Order Number: 321322-002
Intel® Xeon® Processor 5500 Series
Datasheet, Volume 2
April 2009
2 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
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Copyright © 2009, Intel Corporation.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 3
Contents
1 Introduction ............................................................................................................ 15
1.1 Terminology ..................................................................................................... 15
1.1.1 Processor Terminology .......................................................................... 15
1.2 References ....................................................................................................... 17
2 Register Description ................................................................................................19
2.1 Register Terminology......................................................................................... 19
2.2 Platform Configuration Structure ......................................................................... 20
2.3 Device Mapping................................................................................................. 21
2.4 Detailed Configuration Space Maps ...................................................................... 23
2.5 PCI Standard Registers ...................................................................................... 45
2.5.1 VID - Vendor Identification Register ........................................................ 45
2.5.2 DID - Device Identification Register......................................................... 45
2.5.3 RID - Revision Identification Register....................................................... 46
2.5.4 CCR - Class Code Register .....................................................................46
2.5.5 HDR - Header Type Register................................................................... 47
2.5.6 SID/SVID - Subsystem Identity/Subsystem Vendor
Identification Register ........................................................................... 47
2.5.7 PCICMD - Command Register ................................................................. 48
2.5.8 PCISTS - PCI Status Register.................................................................. 49
2.6 Generic Non-core Registers ................................................................................ 50
2.6.1 MAXREQUEST_LC .................................................................................50
2.6.2 MAXREQUEST_LS .................................................................................51
2.6.3 MAXREQUEST_LL..................................................................................51
2.6.4 MAX_RTIDS .........................................................................................51
2.6.5 DESIRED_CORES..................................................................................52
2.6.6 MEMLOCK_STATUS ............................................................................... 52
2.6.7 MC_CFG_CONTROL...............................................................................53
2.6.8 POWER_CNTRL_ERR_STATUS................................................................. 53
2.6.9 CURRENT_UCLK_RATIO......................................................................... 54
2.6.10 MIRROR_PORT_CTL ..............................................................................55
2.6.11 MIP_PH_CTR_L0
MIP_PH_CTR_L1...................................................................................55
2.6.12 MIP_PH_PRT_L0
MIP_PH_PRT_L1 ...................................................................................56
2.7 SAD - System Address Decoder Registers............................................................. 56
2.7.1 SAD_PAM0123 .....................................................................................56
2.7.2 SAD_PAM456 .......................................................................................58
2.7.3 SAD_HEN ............................................................................................59
2.7.4 SAD_SMRAM........................................................................................ 59
2.7.5 SAD_PCIEXBAR ....................................................................................60
2.7.6 SAD_DRAM_RULE_0
SAD_DRAM_RULE_1
SAD_DRAM_RULE_2
SAD_DRAM_RULE_3
SAD_DRAM_RULE_4
SAD_DRAM_RULE_5
SAD_DRAM_RULE_6
SAD_DRAM_RULE_7.............................................................................. 60
4 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.7.7 SAD_INTERLEAVE_LIST_0
SAD_INTERLEAVE_LIST_1
SAD_INTERLEAVE_LIST_2
SAD_INTERLEAVE_LIST_3
SAD_INTERLEAVE_LIST_4
SAD_INTERLEAVE_LIST_5
SAD_INTERLEAVE_LIST_6
SAD_INTERLEAVE_LIST_7......................................................................61
2.8 Intel QPI Link Registers ......................................................................................61
2.8.1 QPI_QPILCP_L0
QPI_QPILCP_L1 ....................................................................................61
2.8.2 QPI_QPILCL_L0
QPI_QPILCL_L1.....................................................................................62
2.8.3 QPI_QPILS_L0
QPI_QPILS_L1 ......................................................................................63
2.8.4 QPI_DEF_RMT_VN_CREDITS_L0
QPI_DEF_RMT_VN_CREDITS_L1..............................................................63
2.8.5 QPI_RMT_QPILP0_STAT_L0
QPI_RMT_QPILP0_STAT_L1....................................................................63
2.8.6 QPI_RMT_QPILP1_STAT_L0
QPI_RMT_QPILP1_STAT_L1....................................................................64
2.8.7 QPI_RMT_QPILP2_STAT_L0
QPI_RMT_QPILP2_STAT_L1....................................................................64
2.8.8 QPI_RMT_QPILP3_STAT_L0
QPI_RMT_QPILP3_STAT_L1....................................................................65
2.9 Intel QPI Physical Layer Registers ........................................................................66
2.9.1 QPI_0_PH_CPR
QPI_1_PH_CPR.....................................................................................66
2.9.2 QPI_0_PH_CTR
QPI_1_PH_CTR.....................................................................................67
2.9.3 QPI_0_PH_PIS
QPI_1_PH_PIS......................................................................................68
2.9.4 QPI_0_PH_PTV
QPI_1_PH_PTV .....................................................................................69
2.9.5 QPI_0_PH_LDC
QPI_1_PH_LDC.....................................................................................69
2.9.6 QPI_0_PH_PRT
QPI_1_PH_PRT .....................................................................................70
2.9.7 QPI_0_PH_PMR0
QPI_1_PH_PMR0...................................................................................70
2.9.8 QPI_0_EP_SR
QPI_1_EP_SR .......................................................................................71
2.9.9 QPI_0_EP_MCTR
QPI_1_EP_MCTR...................................................................................71
2.10 Intel QPI Miscellaneous Registers.........................................................................72
2.10.1 QPI_0_PLL_STATUS
QPI_1_PLL_STATUS...............................................................................72
2.10.2 QPI_0_PLL_RATIO
QPI_1_PLL_RATIO.................................................................................72
2.11 Integrated Memory Controller Control Registers.....................................................73
2.11.1 MC_CONTROL.......................................................................................73
2.11.2 MC_STATUS .........................................................................................74
2.11.3 MC_SMI_DIMM_ERROR_STATUS .............................................................74
2.11.4 MC_SMI_CNTRL....................................................................................75
2.11.5 MC_RESET_CONTROL ............................................................................76
2.11.6 MC_CHANNEL_MAPPER ..........................................................................76
2.11.7 MC_MAX_DOD......................................................................................77
2.11.8 MC_RD_CRDT_INIT...............................................................................77
2.11.9 MC_CRDT_WR_THLD .............................................................................78
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 5
2.11.10 MC_SCRUBADDR_LO.............................................................................79
2.11.11 MC_SCRUBADDR_HI .............................................................................79
2.12 TAD - Target Address Decoder Registers .............................................................. 80
2.12.1 TAD_DRAM_RULE_0
TAD_DRAM_RULE_1
TAD_DRAM_RULE_2
TAD_DRAM_RULE_3
TAD_DRAM_RULE_4
TAD_DRAM_RULE_5
TAD_DRAM_RULE_6
TAD_DRAM_RULE_7.............................................................................. 80
2.12.2 TAD_INTERLEAVE_LIST_0
TAD_INTERLEAVE_LIST_1
TAD_INTERLEAVE_LIST_2
TAD_INTERLEAVE_LIST_3
TAD_INTERLEAVE_LIST_4
TAD_INTERLEAVE_LIST_5
TAD_INTERLEAVE_LIST_6
TAD_INTERLEAVE_LIST_7...................................................................... 81
2.13 Integrated Memory Controller RAS Registers......................................................... 82
2.13.1 MC_SSRCONTROL.................................................................................82
2.13.2 MC_SCRUB_CONTROL........................................................................... 83
2.13.3 MC_RAS_ENABLES................................................................................83
2.13.4 MC_RAS_STATUS .................................................................................83
2.13.5 MC_SSRSTATUS ...................................................................................84
2.13.6 MC_COR_ECC_CNT_0
MC_COR_ECC_CNT_1
MC_COR_ECC_CNT_2
MC_COR_ECC_CNT_3
MC_COR_ECC_CNT_4
MC_COR_ECC_CNT_5............................................................................84
2.14 Integrated Memory Controller Test Registers......................................................... 85
2.14.1 MC_TEST_ERR_RCV1 ............................................................................ 85
2.14.2 MC_TEST_ERR_RCV0 ............................................................................ 85
2.14.3 MC_TEST_PH_CTR................................................................................86
2.14.4 MC_TEST_PH_PIS.................................................................................86
2.14.5 MC_TEST_PAT_GCTR ............................................................................ 86
2.14.6 MC_TEST_PAT_BA ................................................................................87
2.14.7 MC_TEST_PAT_IS.................................................................................87
2.14.8 MC_TEST_PAT_DCD..............................................................................87
2.15 Integrated Memory Controller Channel Control Registers ........................................ 88
2.15.1 MC_CHANNEL_0_DIMM_RESET_CMD
MC_CHANNEL_1_DIMM_RESET_CMD
MC_CHANNEL_2_DIMM_RESET_CMD....................................................... 88
2.15.2 MC_CHANNEL_0_DIMM_INIT_CMD
MC_CHANNEL_1_DIMM_INIT_CMD
MC_CHANNEL_2_DIMM_INIT_CMD.......................................................... 88
2.15.3 MC_CHANNEL_0_DIMM_INIT_PARAMS
MC_CHANNEL_1_DIMM_INIT_PARAMS
MC_CHANNEL_2_DIMM_INIT_PARAMS .................................................... 89
2.15.4 MC_CHANNEL_0_DIMM_INIT_STATUS
MC_CHANNEL_1_DIMM_INIT_STATUS
MC_CHANNEL_2_DIMM_INIT_STATUS..................................................... 91
2.15.5 MC_CHANNEL_0_DDR3CMD
MC_CHANNEL_1_DDR3CMD
MC_CHANNEL_2_DDR3CMD ................................................................... 92
2.15.6 MC_CHANNEL_0_REFRESH_THROTTLE_SUPPORT
MC_CHANNEL_1_REFRESH_THROTTLE_SUPPORT
MC_CHANNEL_2_REFRESH_THROTTLE_SUPPORT...................................... 93
6 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.7 MC_CHANNEL_0_MRS_VALUE_0_1
MC_CHANNEL_1_MRS_VALUE_0_1
MC_CHANNEL_2_MRS_VALUE_0_1..........................................................93
2.15.8 MC_CHANNEL_0_MRS_VALUE_2
MC_CHANNEL_1_MRS_VALUE_2
MC_CHANNEL_2_MRS_VALUE_2 .............................................................94
2.15.9 MC_CHANNEL_0_RANK_PRESENT
MC_CHANNEL_1_RANK_PRESENT
MC_CHANNEL_2_RANK_PRESENT............................................................94
2.15.10 MC_CHANNEL_0_RANK_TIMING_A
MC_CHANNEL_1_RANK_TIMING_A
MC_CHANNEL_2_RANK_TIMING_A ..........................................................95
2.15.11 MC_CHANNEL_0_RANK_TIMING_B
MC_CHANNEL_1_RANK_TIMING_B
MC_CHANNEL_2_RANK_TIMING_B ..........................................................98
2.15.12 MC_CHANNEL_0_BANK_TIMING
MC_CHANNEL_1_BANK_TIMING
MC_CHANNEL_2_BANK_TIMING..............................................................99
2.15.13 MC_CHANNEL_0_REFRESH_TIMING
MC_CHANNEL_1_REFRESH_TIMING
MC_CHANNEL_2_REFRESH_TIMING.........................................................99
2.15.14 MC_CHANNEL_0_CKE_TIMING
MC_CHANNEL_1_CKE_TIMING
MC_CHANNEL_2_CKE_TIMING ..............................................................100
2.15.15 MC_CHANNEL_0_ZQ_TIMING
MC_CHANNEL_1_ZQ_TIMING
MC_CHANNEL_2_ZQ_TIMING ...............................................................100
2.15.16 MC_CHANNEL_0_RCOMP_PARAMS
MC_CHANNEL_1_RCOMP_PARAMS
MC_CHANNEL_2_RCOMP_PARAMS.........................................................101
2.15.17 MC_CHANNEL_0_ODT_PARAMS1
MC_CHANNEL_1_ODT_PARAMS1
MC_CHANNEL_2_ODT_PARAMS1...........................................................101
2.15.18 MC_CHANNEL_0_ODT_PARAMS2
MC_CHANNEL_1_ODT_PARAMS2
MC_CHANNEL_2_ODT_PARAMS2...........................................................102
2.15.19 MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_RD
MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_RD
MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_RD.......................................102
2.15.20 MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_RD
MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_RD
MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_RD.......................................103
2.15.21 MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_WR
MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_WR
MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_WR ......................................103
2.15.22 MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_WR
MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_WR
MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_WR ......................................103
2.15.23 MC_CHANNEL_0_WAQ_PARAMS
MC_CHANNEL_1_WAQ_PARAMS
MC_CHANNEL_2_WAQ_PARAMS............................................................104
2.15.24 MC_CHANNEL_0_SCHEDULER_PARAMS
MC_CHANNEL_1_SCHEDULER_PARAMS
MC_CHANNEL_2_SCHEDULER_PARAMS..................................................104
2.15.25 MC_CHANNEL_0_MAINTENANCE_OPS
MC_CHANNEL_1_MAINTENANCE_OPS
MC_CHANNEL_2_MAINTENANCE_OPS....................................................105
2.15.26 MC_CHANNEL_0_TX_BG_SETTINGS
MC_CHANNEL_1_TX_BG_SETTINGS
MC_CHANNEL_2_TX_BG_SETTINGS ......................................................105
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 7
2.15.27 MC_CHANNEL_0_RX_BGF_SETTINGS
MC_CHANNEL_1_RX_BGF_SETTINGS
MC_CHANNEL_2_RX_BGF_SETTINGS .................................................... 106
2.15.28 MC_CHANNEL_0_EW_BGF_SETTINGS
MC_CHANNEL_1_EW_BGF_SETTINGS
MC_CHANNEL_2_EW_BGF_SETTINGS.................................................... 106
2.15.29 MC_CHANNEL_0_EW_BGF_OFFSET_SETTINGS
MC_CHANNEL_1_EW_BGF_OFFSET_SETTINGS
MC_CHANNEL_2_EW_BGF_OFFSET_SETTINGS ....................................... 106
2.15.30 MC_CHANNEL_0_ROUND_TRIP_LATENCY
MC_CHANNEL_1_ROUND_TRIP_LATENCY
MC_CHANNEL_2_ROUND_TRIP_LATENCY............................................... 107
2.15.31 MC_CHANNEL_0_PAGETABLE_PARAMS1
MC_CHANNEL_1_PAGETABLE_PARAMS1
MC_CHANNEL_2_PAGETABLE_PARAMS1 ................................................ 107
2.15.32 MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH0
MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH1
MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH2 ..................................... 107
2.15.33 MC_TX_BG_CMD_OFFSET_SETTINGS_CH0
MC_TX_BG_CMD_OFFSET_SETTINGS_CH1
MC_TX_BG_CMD_OFFSET_SETTINGS_CH2............................................. 108
2.15.34 MC_TX_BG_DATA_OFFSET_SETTINGS_CH0
MC_TX_BG_DATA_OFFSET_SETTINGS_CH1
MC_TX_BG_DATA_OFFSET_SETTINGS_CH2 ........................................... 108
2.16 Integrated Memory Controller Channel Address Registers ..................................... 109
2.16.1 MC_DOD_CH0_0
MC_DOD_CH0_1
MC_DOD_CH0_2 ................................................................................ 109
2.16.2 MC_DOD_CH1_0
MC_DOD_CH1_1
MC_DOD_CH1_2 ................................................................................ 110
2.16.3 MC_DOD_CH2_0
MC_DOD_CH2_1
MC_DOD_CH2_2 ................................................................................ 111
2.16.4 MC_SAG_CH0_0
MC_SAG_CH0_1
MC_SAG_CH0_2
MC_SAG_CH0_3
MC_SAG_CH0_4
MC_SAG_CH0_5
MC_SAG_CH0_6
MC_SAG_CH0_7
MC_SAG_CH1_0
MC_SAG_CH1_1
MC_SAG_CH1_2
MC_SAG_CH1_3
MC_SAG_CH1_4
MC_SAG_CH1_5
MC_SAG_CH1_6
MC_SAG_CH1_7
MC_SAG_CH2_0
MC_SAG_CH2_1
MC_SAG_CH2_2
MC_SAG_CH2_3
MC_SAG_CH2_4
MC_SAG_CH2_5
MC_SAG_CH2_6
MC_SAG_CH2_7................................................................................. 112
2.17 Integrated Memory Controller Channel Rank Registers ......................................... 113
8 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.17.1 MC_RIR_LIMIT_CH0_0
MC_RIR_LIMIT_CH0_1
MC_RIR_LIMIT_CH0_2
MC_RIR_LIMIT_CH0_3
MC_RIR_LIMIT_CH0_4
MC_RIR_LIMIT_CH0_5
MC_RIR_LIMIT_CH0_6
MC_RIR_LIMIT_CH0_7
MC_RIR_LIMIT_CH1_0
MC_RIR_LIMIT_CH1_1
MC_RIR_LIMIT_CH1_2
MC_RIR_LIMIT_CH1_3
MC_RIR_LIMIT_CH1_4
MC_RIR_LIMIT_CH1_5
MC_RIR_LIMIT_CH1_6
MC_RIR_LIMIT_CH1_7
MC_RIR_LIMIT_CH2_0
MC_RIR_LIMIT_CH2_1
MC_RIR_LIMIT_CH2_2
MC_RIR_LIMIT_CH2_3
MC_RIR_LIMIT_CH2_4
MC_RIR_LIMIT_CH2_5
MC_RIR_LIMIT_CH2_6
MC_RIR_LIMIT_CH2_7.........................................................................113
2.17.2 MC_RIR_WAY_CH0_0
MC_RIR_WAY_CH0_1
MC_RIR_WAY_CH0_2
MC_RIR_WAY_CH0_3
MC_RIR_WAY_CH0_4
MC_RIR_WAY_CH0_5
MC_RIR_WAY_CH0_6
MC_RIR_WAY_CH0_7
MC_RIR_WAY_CH0_8
MC_RIR_WAY_CH0_9
MC_RIR_WAY_CH0_10
MC_RIR_WAY_CH0_11
MC_RIR_WAY_CH0_12
MC_RIR_WAY_CH0_13
MC_RIR_WAY_CH0_14
MC_RIR_WAY_CH0_15
MC_RIR_WAY_CH0_16
MC_RIR_WAY_CH0_17
MC_RIR_WAY_CH0_18
MC_RIR_WAY_CH0_19
MC_RIR_WAY_CH0_20
MC_RIR_WAY_CH0_21
MC_RIR_WAY_CH0_22
MC_RIR_WAY_CH0_23
MC_RIR_WAY_CH0_24
MC_RIR_WAY_CH0_25
MC_RIR_WAY_CH0_26
MC_RIR_WAY_CH0_27
MC_RIR_WAY_CH0_28
MC_RIR_WAY_CH0_29
MC_RIR_WAY_CH0_30
MC_RIR_WAY_CH0_31.........................................................................114
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 9
2.17.3 MC_RIR_WAY_CH1_0
MC_RIR_WAY_CH1_1
MC_RIR_WAY_CH1_2
MC_RIR_WAY_CH1_3
MC_RIR_WAY_CH1_4
MC_RIR_WAY_CH1_5
MC_RIR_WAY_CH1_6
MC_RIR_WAY_CH1_7
MC_RIR_WAY_CH1_8
MC_RIR_WAY_CH1_9
MC_RIR_WAY_CH1_10
MC_RIR_WAY_CH1_11
MC_RIR_WAY_CH1_12
MC_RIR_WAY_CH1_13
MC_RIR_WAY_CH1_14
MC_RIR_WAY_CH1_15
MC_RIR_WAY_CH1_16
MC_RIR_WAY_CH1_17
MC_RIR_WAY_CH1_18
MC_RIR_WAY_CH1_19
MC_RIR_WAY_CH1_20
MC_RIR_WAY_CH1_21
MC_RIR_WAY_CH1_22
MC_RIR_WAY_CH1_23
MC_RIR_WAY_CH1_24
MC_RIR_WAY_CH1_25
MC_RIR_WAY_CH1_26
MC_RIR_WAY_CH1_27
MC_RIR_WAY_CH1_28
MC_RIR_WAY_CH1_29
MC_RIR_WAY_CH1_30
MC_RIR_WAY_CH1_31 ........................................................................ 115
10 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.17.4 MC_RIR_WAY_CH2_0
MC_RIR_WAY_CH2_1
MC_RIR_WAY_CH2_2
MC_RIR_WAY_CH2_3
MC_RIR_WAY_CH2_4
MC_RIR_WAY_CH2_5
MC_RIR_WAY_CH2_6
MC_RIR_WAY_CH2_7
MC_RIR_WAY_CH2_8
MC_RIR_WAY_CH2_9
MC_RIR_WAY_CH2_10
MC_RIR_WAY_CH2_11
MC_RIR_WAY_CH2_12
MC_RIR_WAY_CH2_13
MC_RIR_WAY_CH2_14
MC_RIR_WAY_CH2_15
MC_RIR_WAY_CH2_16
MC_RIR_WAY_CH2_17
MC_RIR_WAY_CH2_18
MC_RIR_WAY_CH2_19
MC_RIR_WAY_CH2_20
MC_RIR_WAY_CH2_21
MC_RIR_WAY_CH2_22
MC_RIR_WAY_CH2_23
MC_RIR_WAY_CH2_24
MC_RIR_WAY_CH2_25
MC_RIR_WAY_CH2_26
MC_RIR_WAY_CH2_27
MC_RIR_WAY_CH2_28
MC_RIR_WAY_CH2_29
MC_RIR_WAY_CH2_30
MC_RIR_WAY_CH2_31.........................................................................117
2.18 Memory Thermal Control ..................................................................................118
2.18.1 MC_THERMAL_CONTROL0
MC_THERMAL_CONTROL1
MC_THERMAL_CONTROL2 ....................................................................118
2.18.2 MC_THERMAL_STATUS0
MC_THERMAL_STATUS1
MC_THERMAL_STATUS2.......................................................................119
2.18.3 MC_THERMAL_DEFEATURE0
MC_THERMAL_DEFEATURE1
MC_THERMAL_DEFEATURE2 .................................................................119
2.18.4 MC_THERMAL_PARAMS_A0
MC_THERMAL_PARAMS_A1
MC_THERMAL_PARAMS_A2 ..................................................................119
2.18.5 MC_THERMAL_PARAMS_B0
MC_THERMAL_PARAMS_B1
MC_THERMAL_PARAMS_B2 ..................................................................120
2.18.6 MC_COOLING_COEF0
MC_COOLING_COEF1
MC_COOLING_COEF2 ..........................................................................120
2.18.7 MC_CLOSED_LOOP0
MC_CLOSED_LOOP1
MC_CLOSED_LOOP2............................................................................121
2.18.8 MC_THROTTLE_OFFSET0
MC_THROTTLE_OFFSET1
MC_THROTTLE_OFFSET2......................................................................121
2.18.9 MC_RANK_VIRTUAL_TEMP0
MC_RANK_VIRTUAL_TEMP1
MC_RANK_VIRTUAL_TEMP2..................................................................122
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 11
2.18.10 MC_DDR_THERM_COMMAND0
MC_DDR_THERM_COMMAND1
MC_DDR_THERM_COMMAND2.............................................................. 122
2.18.11 MC_DDR_THERM_STATUS0
MC_DDR_THERM_STATUS1
MC_DDR_THERM_STATUS2.................................................................. 123
2.19 Integrated Memory Controller Miscellaneous Registers.......................................... 123
2.19.1 MC_DIMM_CLK_RATIO_STATUS ........................................................... 123
2.19.2 MC_DIMM_CLK_RATIO ........................................................................ 124
3 DIMM Population Requirements ............................................................................ 125
3.1 General Population Requirements ...................................................................... 125
3.2 Populating DIMMs Within a Channel ................................................................... 126
3.2.1 DIMM Population for Three Slots per Channel ......................................... 126
3.2.2 DIMM Population for Two Slots per Channel............................................ 128
Tables
1-1 References ....................................................................................................... 17
2-1 Functions Specifically Handled by the Processor..................................................... 22
2-2 Device 0, Function 0: Generic Non-core Registers.................................................. 23
2-3 Device 0, Function 1: System Address Decoder Registers ....................................... 24
2-4 Device 2, Function 0: Intel QPI Link 0 Registers .................................................... 25
2-5 Device 2, Function 1: Intel QPI Physical 0 Registers............................................... 26
2-6 Device 2, Function 4: Intel QPI Link 1 Registers1................................................... 27
2-7 Device 2, Function 5: Intel QPI Physical 1 Registers............................................... 28
2-8 Device 3, Function 0: Integrated Memory Controller Registers................................. 29
2-9 Device 3, Function 1: Target Address Decoder Registers......................................... 30
2-10 Device 3, Function 2: Integrated Memory Controller RAS Registers .......................... 31
2-11 Device 3, Function 4: Integrated Memory Controller Test Registers .......................... 32
2-12 Device 4, Function 0: Integrated Memory Controller Channel 0
Control Registers ...............................................................................................33
2-13 Device 4, Function 1: Integrated Memory Controller Channel 0
Address Registers ..............................................................................................34
2-14 Device 4, Function 2: Integrated Memory Controller Channel 0
Rank Registers..................................................................................................35
2-15 Device 4, Function 3: Integrated Memory Controller Channel 0
Thermal Control Registers ..................................................................................36
2-16 Device 5, Function 0: Integrated Memory Controller Channel 1
Control Registers ...............................................................................................37
2-17 Device 5, Function 1: Integrated Memory Controller Channel 1
Address Registers ..............................................................................................38
2-18 Device 5, Function 2: Integrated Memory Controller Channel 1
Rank Registers..................................................................................................39
2-19 Device 5, Function 3: Integrated Memory Controller Channel 1
Thermal Control Registers ..................................................................................40
2-20 Device 6, Function 0: Integrated Memory Controller Channel 2
Control Registers ...............................................................................................41
2-21 Device 6, Function 1: Integrated Memory Controller Channel 2
Address Registers ..............................................................................................42
2-22 Device 6, Function 2: Integrated Memory Controller Channel 2
Rank Registers..................................................................................................43
2-23 Device 6, Function 3: Integrated Memory Controller Channel 2
Thermal Control Registers ..................................................................................44
12 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
3-1 Key Parameters for DIMM Configurations ............................................................125
3-2 RDIMM Population Configurations within a Channel for Three Slots
per Channel ....................................................................................................127
3-3 UDIMM Population Configurations within a Channel for Three Slots
per Channel ....................................................................................................127
3-4 MetaSDRAM* R-DIMM Population Configurations within a Channel for
Three Slots per Channel ...................................................................................128
3-5 RDIMM Population Configurations Within a Channel for
Two Slots per Channel......................................................................................129
3-6 UDIMM Population Configurations within a Channel for Two Slots per Channel..........129
3-7 MetaSDRAM R-DIMM Population Configurations within a Channel for
Two Slots per Channel......................................................................................129
Figures
3-1 DIMM Population within a Channel for Three Slots per Channel ..............................126
3-2 DIMM Population Within a Channel for Two Slots per Channel ................................128
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 13
Revision History
§
Reference
Number Revision
Number Description Date
321322 001 Public release March 2009
321322 002 Added Chapter 3 “DIMM Population Requirements” April 2009
14 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 15
Introduction
1Introduction
The Intel® Xeon® Processor 5500 Series is the first generation DP server/workstation
processor to implement key new technologies:
• Integrated Memory Controller
• Point-to-point link interface based on Intel® QuickPath Interconnect (Intel® QPI).
Reference to this interface may sometimes be abbreviated with Intel QPI
throughout this document.
The processor is optimized for performance with the power efficiencies of a low-power
microarchitecture to enable smaller, quieter systems.
This document provides register documentation and functional description of major
functional areas of the processor non-core design such as the memory controller and
Intel QPI logic, and additional features pertinent to implementation and operation of
the processor.
The Intel Xeon Processor 5500 Series are multi-core processors, based on 45 nm
process technology. Processor features vary by SKU and include up to two Intel
QuickPath Interconnect point to point links capable of up to 6.4 GT/s, up to 8 MB of
shared cache, and an integrated memory controller. The processors support all the
existing Streaming SIMD Extensions 2 (SSE2), Streaming SIMD Extensions 3 (SSE3)
and Streaming SIMD Extensions 4 (SSE4). The processor supports several Advanced
Technologies: Execute Disable Bit, Intel® 64 Technology, Enhanced Intel® SpeedStep
Technology, Intel® Virtualization Technology (Intel® VT), and Intel® Hyper-Threading
Technology.
1.1 Terminology
A ‘#’ symbol after a signal name refers to an active low signal, indicating a signal is in
the active state when driven to a low level. For example, when RESET# is low, a reset
has been requested.
1.1.1 Processor Terminology
Commonly used terms are explained here for clarification:
•DDR3 — Double Data Rate 3 synchronous dynamic random access memory
(SDRAM) is the name of the new DDR memory standard that is being developed as
the successor to DDR2 SDRAM.
•Enhanced Intel SpeedStep® Technology — Enhanced Intel SpeedStep
Technology allows trade-offs to be made between performance and power
consumption.
•Execute Disable Bit — Execute Disable allows memory to be marked as
executable or non-executable, when combined with a supporting operating system.
If code attempts to run in non-executable memory the processor raises an error to
the operating system. This feature can prevent some classes of viruses or worms
that exploit buffer over run vulnerabilities and can thus help improve the overall
security of the system. See the Intel® 64 and IA-32 Architectures Software
Developer’s Manual for more detailed information. Refer to
http://developer.intel.com/ for future reference on up to date nomenclatures.
Introduction
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
16
•Eye Definitions — The eye at any point along the data channel is defined to be the
creation of overlapping of a large number of Unit Interval of the data signal and
timing width measured with respect to the edges of a separate clock signal at any
other point. Each differential signal pair by combining the D+ and D- signals
produces a signal eye.
•1366-land LGA package — The processor is available in a Land Grid Array (LGA)
package, consisting of the processor die mounted on a land grid array substrate
with an integrated heat spreader (IHS).
•Functional Operation — Refers to the normal operating conditions in which all
processor specifications, including DC, AC, system bus, signal quality, mechanical,
and thermal, are satisfied.
•Integrated Memory Controller (IMC) — A memory controller that is integrated
in the processor silicon.
•Integrated Heat Spreader (IHS) — A component of the processor package used
to enhance the thermal performance of the package. Component thermal solutions
interface with the processor at the IHS surface.
•Intel® 64 Architecture — An enhancement to Intel's IA-32 architecture, allowing
the processor to execute operating systems and applications written to take
advantage of Intel 64. Further details on Intel 64 architecture and programming
model can be found at http://developer.intel.com/technology/intel64/.
•Intel® QuickPath Interconnect – A cache-coherent, link-based interconnect
specification for Intel processor, chipset, and I/O bridge components. Sometimes
abbreviated as Intel QPI.
•Intel® QPI — Abbreviation for Intel® QuickPath Interconnect.
•Intel® Virtualization Technology (Intel® VT) — A set of hardware
enhancements to Intel server and client platforms that can improve virtualization
solutions. Intel VT provides a foundation for widely-deployed virtualization
solutions and enables more robust hardware assisted virtualization solutions. More
information can be found at: http://www.intel.com/technology/virtualization/
•Jitter — Any timing variation of a transition edge or edges from the defined Unit
Interval.
•LGA1366 Socket — The processor (in the LGA-1366 package) mates with the
system board through this surface mount, 1366-contact socket.
•Mirror Port - Pads located on the top side of the processor package used to
provide logic analyzer probing access for Intel QPI signal analysis.
•Non-core — The portion of the processor comprising the shared cache, IMC and
Intel QPI Link interface.
•OEM — Original Equipment Manufacturer.
•Storage Conditions — Refers to a non-operational state. The processor may be
installed in a platform, in a tray, or loose. Processors may be sealed in packaging or
exposed to free air. Under these conditions, processor lands should not be
connected to any supply voltages, have any I/Os biased, or receive any clocks.
•Intel Xeon Processor 5500 Series — The 2S server/workstation product,
including processor substrate and integrated heat spreader (IHS).
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 17
Introduction
•Unit Interval (UI) — Signaling convention that is binary and unidirectional. In
this binary signaling, one bit is sent for every edge of the forwarded clock, whether
it be a rising edge or a falling edge. If a number of edges are collected at instances
t1, t2, tn,...., tkthen the UI at instance “n” is defined as:
UI n = t n- t n - 1
1.2 References
Material and concepts available in the following documents may be beneficial when
reading this document:
§
Table 1-1. References
Document Reference # Notes
Intel® 64 and IA-32 Architectures Software Developer’s Manual
• Volume 1: Basic Architecture
• Volume 2A: Instruction Set Reference, A-M
• Volume 2B: Instruction Set Reference, N-Z
• Volume 3A: System Programming Guide, Part 1
• Volume 3B: Systems Programming Guide, Part 2
253665
253666
253667
253668
253669
1
Notes:
1. Document is available publicly at http://www.intel.com.
Intel® 64 and IA-32 Architectures Optimization Reference Manual 248966 1
Intel® Xeon® Processor 5500 Series Specification Update 321324 1
Intel® Xeon® Processor 5500 Series Datasheet, Volume 1 321321 1
Introduction
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
18
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 19
Register Description
2Register Description
The processor supports PCI configuration space accesses using the mechanism denoted
as Configuration Mechanism in the PCI specification as defined in the PCI Local Bus
Specification, as well as the PCI Express enhanced configuration mechanism as
specified in the PCI Express Base Specification. All the registers are organized by bus,
device, function, etc. as defined in the PCI Express Base Specification. All processor
registers appear on the PCI bus assigned for the processor socket. Bus number is
derived by the max bus range setting and processor socket number. All multi-byte
numeric fields use “little-endian” ordering (i.e., lower addresses contain the least
significant parts of the field).
As processor features vary by SKU, not all of the register descriptions in this document
apply to all processors. This document highlights registers which do not apply to all
processor SKUs. Refer to the particular processor's Specification Update for a list of
features supported.
2.1 Register Terminology
Registers and register bits are assigned one or more of the following attributes. These
attributes define the behavior of register and the bit(s) that are contained with in. All
bits are set to default values by hard reset. Sticky bits retain their states between hard
resets.
i
Term Description
RO Read Only. If a register bit is read only, the hardware sets its state. The bit may be read
by software. Writes to this bit have no effect.
WO Write Only. The register bit is not implemented as a bit. The write causes some hardware
event to take place.
RW Read/Write. A register bit with this attribute can be read and written by software.
RC Read Clear: The bit or bits can be read by software, but the act of reading causes the
value to be cleared.
RCW Read Clear/Write: A register bit with this attribute will get cleared after the read. The
register bit can be written.
RW1C Read/Write 1 Clear. A register bit with this attribute can be read or cleared by software.
In order to clear this bit, a one must be written to it. Writing a zero will have no effect.
RW0C Read/Write 0 Clear. A register bit with this attribute can be read or cleared by software.
In order to clear this bit, a zero must be written to it. Writing a one will have no effect.
RW1S Read/Write 1 Set: A register bit can be either read or set by software. In order to set
this bit, a one must be written to it. Writing a zero to this bit has no effect. Hardware will
clear this bit.
RW0S Read/Write 0 Set: A register bit can be either read or set by software. In order to set
this bit, a zero must be written to it. Writing a one to this bit has no effect. Hardware will
clear this bit.
RWL Read/Write/Lock. A register bit with this attribute can be read or written by software.
Hardware or a configuration bit can lock the bit and prevent it from being updated.
RWO Read/Write Once. A register bit with this attribute can be written to only once after
power up. After the first write, the bit becomes read only. This attribute is applied on a bit
by bit basis. For example, if the RWO attribute is applied to a 2 bit field, and only one bit
is written, then the written bit cannot be rewritten (unless reset). The unwritten bit, of the
field, may still be written once. This is special case of RWL.
RRW Read/Restricted Write. This bit can be read and written by software. However, only
supported values will be written. Writes of non supported values will have no effect.
LLock. A register bit with this attribute becomes Read Only after a lock bit is set.
Register Description
20 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.2 Platform Configuration Structure
The processor contains 6 PCI devices within a single physical component. The
configuration registers for these devices are mapped as devices residing on the PCI bus
assigned for the processor socket. Bus number is derived by the max bus range setting
and processor socket number.
•Device 0: Generic processor non-core. Device 0, Function 0 contains the generic
non-core configuration registers for the processor and resides at DID (Device ID) of
2C40h. Device 0, Function 1 contains the System Address Decode registers and
resides at DID of 2C01h.
•Device 2: Intel QPI. Device 2, Function 0 contains the Intel® QuickPath
Interconnect configuration registers for Intel QPI Link 0 and resides at DID of
2C10h. Device 2, Function 1 contains the physical layer registers for Intel QPI Link
0 and resides at DID of 2C11h. Device 2, Function 4 contains the Intel® QuickPath
configuration registers for Intel® QuickPath Interconnect Link 1 and resides at DID
of 2C14h. Device 2, Function 5 contains the physical layer registers for Intel QPI
Link 1 and resides at DID of 2C15h. Functions 4 and 5 only apply to processors with
two Intel QPI links.
•Device 3: Integrated Memory Controller. Device 3, Function 0 contains the general
registers for the Integrated Memory Controller and resides at DID of 2C18h. Device
3, Function 1 contains the Target Address Decode registers for the Integrated
Memory Controller and resides at DID of 2C19h. Device 3, Function 2 contains the
RAS registers for the Integrated Memory Controller and resides at DID of 2C1Ah.
Device 3, Function 4 contains the test registers for the Integrated Memory
Controller and resides at DID of 2C1Ch. Function 2 only applies to processors
supporting registered DIMMs.
•Device 4: Integrated Memory Controller Channel 0. Device 4, Function 0 contains
the control registers for Integrated Memory Controller Channel 0 and resides at
RSVD Reserved Bit. This bit is reserved for future expansion and must not be written. The PCI
Local Bus Specification requires that reserved bits must be preserved. Any software that
modifies a register that contains a reserved bit is responsible for reading the register,
modifying the desired bits, and writing back the result.
Reserved Bits Some of the processor registers described in this section contain reserved bits. These bits
are labeled “Reserved”. Software must deal correctly with fields that are reserved. On
reads, software must use appropriate masks to extract the defined bits and not rely on
reserved bits being any particular value. On writes, software must ensure that the values
of reserved bit positions are preserved. That is, the values of reserved bit positions must
first be read, merged with the new values for other bit positions and then written back.
Note that software does not need to perform a read-merge-write operation for the
Configuration Address (CONFIG_ADDRESS) register.
Reserved
Registers In addition to reserved bits within a register, the processor contains address locations in
the configuration space that are marked either “Reserved” or “Intel Reserved”. The
processor responds to accesses to “Reserved” address locations by completing the host
cycle. When a “Reserved” register location is read, a zero value is returned. (“Reserved”
registers can be 8, 16, or 32 bits in size). Writes to “Reserved” registers have no effect on
the processor. Registers that are marked as “Intel Reserved” must not be modified by
system software. Writes to “Intel Reserved” registers may cause system failure. Reads to
“Intel Reserved” registers may return a non-zero value.
Default Value
upon a Reset Upon a reset, the processor sets all of its internal configuration registers to predetermined
default states. Some register values at reset are determined by external strapping
options. The default state represents the minimum functionality feature set required to
successfully bring up the system. Hence, it does not represent the optimal system
configuration. It is the responsibility of the system initialization software (usually BIOS) to
properly determine the DRAM configurations, operating parameters and optional system
features that are applicable, and to program the processor registers accordingly.
“ST” appended to
the end of a bit
name
The bit is “sticky” or unchanged by a hard reset. These bits can only be cleared by a
PWRGOOD reset.
Term Description
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 21
Register Description
DID of 2C20h. Device 4, Function 1 contains the address registers for Integrated
Memory Controller Channel 0 and resides at DID of 2C21h. Device 4, Function 2
contains the rank registers for Integrated Memory Controller Channel 0 and resides
at DID of 2C22h. Device 4, Function 3 contains the thermal control registers for
Integrated Memory Controller Channel 0 and resides at DID of 2C23h.
•Device 5: Integrated Memory Controller Channel 1. Device 5, Function 0 contains
the control registers for Integrated Memory Controller Channel 1 and resides at
DID of 2C28h. Device 5, Function 1 contains the address registers for Integrated
Memory Controller Channel 1 and resides at DID of 2C29h. Device 5, Function 2
contains the rank registers for Integrated Memory Controller Channel 1 and resides
at DID of 2C2Ah. Device 5, Function 3 contains the thermal control registers for
Integrated Memory Controller Channel 1 and resides at DID of 2C2Bh.
•Device 6: Integrated Memory Controller Channel 2. Device 6, Function 0 contains
the control registers for Integrated Memory Controller Channel 2 and resides at
DID of 2C30h. Device 6, Function 1 contains the address registers for Integrated
Memory Controller Channel 2 and resides at DID of 2C31h. Device 6, Function 2
contains the rank registers for Integrated Memory Controller Channel 2 and resides
at DID of 2C32h. Device 6, Function 3 contains the thermal control registers for
Integrated Memory Controller Channel 2 and resides at DID of 2C33h.
2.3 Device Mapping
Each component in the processor is uniquely identified by a PCI bus address consisting
of Bus Number, Device Number and Function Number. Device configuration is based on
the PCI Type 0 configuration conventions. All processor registers appear on the PCI bus
assigned for the processor socket. Bus number is derived by the max bus range setting
and processor socket number.
Register Description
22 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-1. Functions Specifically Handled by the Processor
Component Register Group DID Device Function
Processor Intel® QuickPath Architecture Generic Non-core Registers 2C40h 0 0
Intel® QuickPath Architecture System Address Decoder 2C01h 1
Intel QPI Link 0 2C10h 2 0
Intel QPI Physical 0 2C11 1
Intel QPI Link 1 2C14h 41
Notes:
1. Applies only to processors with two Intel QPI links.
Intel QPI Physical 1 2C15h 51
Integrated Memory Controller Registers 2C18h 3 0
Integrated Memory Controller Target Address Decoder 2C19h 1
Integrated Memory Controller RAS Registers 2C1Ah 22
2. Applies only to processors supporting mirroring and scrubbing RAS features.
Integrated Memory Controller Test Registers 2C1Ch 4
Integrated Memory Controller Channel 0 Control 2C20h 4 0
Integrated Memory Controller Channel 0 Address 2C21h 1
Integrated Memory Controller Channel 0 Rank 2C22h 2
Integrated Memory Controller Channel 0 Thermal Control 2C23h 3
Integrated Memory Controller Channel 1 Control 2C28h 5 0
Integrated Memory Controller Channel 1 Address 2C29h 1
Integrated Memory Controller Channel 1 Rank 2C2Ah 2
Integrated Memory Controller Channel 1 Thermal Control 2C2Bh 3
Integrated Memory Controller Channel 2 Control 2C30h 6 0
Integrated Memory Controller Channel 2 Address 2C31h 1
Integrated Memory Controller Channel 2 Rank 2C32h 2
Integrated Memory Controller Channel 2 Thermal Control 2C33h 3
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 23
Register Description
2.4 Detailed Configuration Space Maps
Table 2-2. Device 0, Function 0: Generic Non-core Registers
DID VID 00h DESIRED_CORES 80h
PCISTS PCICMD 04h 84h
CCR RID 08h MEMLOCK_STATUS 88h
HDR 0Ch 8Ch
10h MC_CFG_CONTROL 90h
14h 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h POWER_CNTRL_ERR_STATUS B0h
34h B4h
38h B8h
3Ch BCh
MAXREQUEST_LC 40h CURRENT_UCLK_RATIO C0h
MAXREQUEST_LS 44h C4h
MAXREQUEST_LL 48h C8h
4Ch CCh
50h MIRROR_PORT_CTL D0h
54h D4h
58h D8h
5Ch DCh
MAX_RTIDS 60h MIP_PH_CTR_L0 E0h
64h MIP_PH_PRT_L0 E4h
68h E8h
6Ch ECh
70h MIP_PH_CTR_L1 F0h
74h MIP_PH_PRT_L1 F4h
78h F8h
7Ch FCh
Register Description
24 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-3. Device 0, Function 1: System Address Decoder Registers
DID VID 00h SAD_DRAM_RULE_0 80h
PCISTS PCICMD 04h SAD_DRAM_RULE_1 84h
CCR RID 08h SAD_DRAM_RULE_2 88h
HDR 0Ch SAD_DRAM_RULE_3 8Ch
10h SAD_DRAM_RULE_4 90h
14h SAD_DRAM_RULE_5 94h
18h SAD_DRAM_RULE_6 98h
1Ch SAD_DRAM_RULE_7 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
SAD_PAM0123 40h SAD_INTERLEAVE_LIST_0 C0h
SAD_PAM456 44h SAD_INTERLEAVE_LIST_1 C4h
SAD_HEN 48h SAD_INTERLEAVE_LIST_2 C8h
SAD_SMRAM 4Ch SAD_INTERLEAVE_LIST_3 CCh
SAD_PCIEXBAR 50h SAD_INTERLEAVE_LIST_4 D0h
54h SAD_INTERLEAVE_LIST_5 D4h
58h SAD_INTERLEAVE_LIST_6 D8h
5Ch SAD_INTERLEAVE_LIST_7 DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 25
Register Description
Table 2-4. Device 2, Function 0: Intel QPI Link 0 Registers
DID VID 00h 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
QPI_QPILCP_L0 40h QPI_RMT_QPILP0_STAT_L0 C0h
44h QPI_RMT_QPILP1_STAT_L0 C4h
QPI_QPILCL_L0 48h QPI_RMT_QPILP2_STAT_L0 C8h
4Ch QPI_RMT_QPILP3_STAT_L0 CCh
QPI_QPILS_L0 50h D0h
54h D4h
QPI_DEF_RMT_VN_CREDITS_L0 58h D8h
5Ch DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Register Description
26 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-5. Device 2, Function 1: Intel QPI Physical 0 Registers
DID VID 00h QPI_0_PH_PIS 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
HDR 0Ch 8Ch
10h 90h
14h QPI_0_PH_PTV 94h
18h 98h
1Ch QPI_0_PH_LDC 9Ch
20h A0h
24h QPI_0_PH_PRT A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
48h C8h
4Ch CCh
QPI_0_PLL_STATUS 50h QPI_0_PH_PMR0 D0h
QPI_0_PLL_RATIO 54h D4h
58h D8h
5Ch DCh
60h QPI_0_EP_SR E0h
64h E4h
QPI_0_PH_CPR 68h E8h
QPI_0_PH_CTR 6Ch ECh
70h F0h
74h QPI_0_EP_MCTR F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 27
Register Description
Note:
1. Applies only to processors with two Intel QPI links.
Table 2-6. Device 2, Function 4: Intel QPI Link 1 Registers1
DID VID 00h 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
BIST HDR 0Ch 8Ch
10h 90h
14h 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
QPI_QPILCP_L1 40h QPI_RMT_QPILP0_STAT_L1 C0h
44h QPI_RMT_QPILP1_STAT_L1 C4h
QPI_QPILCL_L1 48h QPI_RMT_QPILP2_STAT_L1 C8h
4Ch QPI_RMT_QPILP3_STAT_L1 CCh
QPI_QPILS_L1 50h D0h
54h D4h
QPI_DEF_RMT_VN_CREDITS_L1 58h D8h
5Ch DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Register Description
28 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-7. Device 2, Function 5: Intel QPI Physical 1 Registers
DID VID 00h QPI_1_PH_PIS 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
HDR 0Ch 8Ch
10h 90h
14h QPI_1_PH_PTV 94h
18h 98h
1Ch QPI_1_PH_LDC 9Ch
20h A0h
24h QPI_1_PH_PRT A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
48h C8h
4Ch CCh
QPI_1_PLL_STATUS 50h QPI_1_PH_PMR0 D0h
QPI_1_PLL_RATIO 54h D4h
58h D8h
5Ch DCh
60h QPI_1_EP_SR E0h
64h E4h
QPI_1_PH_CPR 68h E8h
QPI_1_PH_CTR 6Ch ECh
70h F0h
74h QPI_1_EP_MCTR F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 29
Register Description
Table 2-8. Device 3, Function 0: Integrated Memory Controller Registers
DID VID 00h 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_CONTROL 48h C8h
MC_STATUS 4Ch CCh
MC_SMI_DIMM_ERROR_STATUS 50h D0h
MC_SMI_CNTRL 54h D4h
58h D8h
MC_RESET_CONTROL 5Ch DCh
MC_CHANNEL_MAPPER 60h E0h
MC_MAX_DOD 64h E4h
68h E8h
6Ch ECh
MC_RD_CRDT_INIT 70h F0h
MC_CRDT_WR_THLD 74h F4h
MC_SCRUBADDR_LO 78h F8h
MC_SCRUBADDR_HI 7Ch FCh
Register Description
30 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-9. Device 3, Function 1: Target Address Decoder Registers
DID VID 00h TAD_DRAM_RULE_0 80h
PCISTS PCICMD 04h TAD_DRAM_RULE_1 84h
CCR RID 08h TAD_DRAM_RULE_2 88h
HDR 0Ch TAD_DRAM_RULE_3 8Ch
10h TAD_DRAM_RULE_4 90h
14h TAD_DRAM_RULE_5 94h
18h TAD_DRAM_RULE_6 98h
1Ch TAD_DRAM_RULE_7 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h TAD_INTERLEAVE_LIST_0 C0h
44h TAD_INTERLEAVE_LIST_1 C4h
48h TAD_INTERLEAVE_LIST_2 C8h
4Ch TAD_INTERLEAVE_LIST_3 CCh
50h TAD_INTERLEAVE_LIST_4 D0h
54h TAD_INTERLEAVE_LIST_5 D4h
58h TAD_INTERLEAVE_LIST_6 D8h
5Ch TAD_INTERLEAVE_LIST_7 DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 31
Register Description
Table 2-10. Device 3, Function 2: Integrated Memory Controller RAS Registers1
Notes:
1. Applies only to processors supporting registered DIMMs.
DID VID 00h MC_COR_ECC_CNT_0 80h
PCISTS PCICMD 04h MC_COR_ECC_CNT_1 84h
CCR RID 08h MC_COR_ECC_CNT_2 88h
HDR 0Ch MC_COR_ECC_CNT_3 8Ch
10h MC_COR_ECC_CNT_4 90h
14h MC_COR_ECC_CNT_5 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_SSRCONTROL 48h C8h
MC_SCRUB_CONTROL 4Ch CCh
MC_RAS_ENABLES 50h D0h
MC_RAS_STATUS 54h D4h
58h D8h
5Ch DCh
MC_SSRSTATUS 60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Register Description
32 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-11. Device 3, Function 4: Integrated Memory Controller Test Registers
DID VID 00h MC_TEST_PH_PIS 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h MC_TEST_PAT_GCTR A8h
SID SVID 2Ch ACh
30h MC_TEST_PAT_BA B0h
34h B4h
38h B8h
3Ch MC_TEST_PAT_IS BCh
40h MC_TEST_PAT_DCD C0h
44h C4h
48h C8h
4Ch CCh
MC_DIMM_CLK_RATIO_STATUS 50h D0h
MC_DIMM_CLK_RATIO 54h D4h
58h D8h
5Ch DCh
MC_TEST_ERR_RCV1 60h E0h
MC_TEST_ERR_RCV0 64h E4h
68h E8h
MC_TEST_PH_CTR 6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 33
Register Description
Table 2-12. Device 4, Function 0: Integrated Memory Controller Channel 0
Control Registers
DID VID 00h MC_CHANNEL_0_RANK_TIMING_A 80h
PCISTS PCICMD 04h MC_CHANNEL_0_RANK_TIMING_B 84h
CCR RID 08h MC_CHANNEL_0_BANK_TIMING 88h
HDR 0Ch MC_CHANNEL_0_REFRESH_TIMING 8Ch
10h MC_CHANNEL_0_CKE_TIMING 90h
14h MC_CHANNEL_0_ZQ_TIMING 94h
18h MC_CHANNEL_0_RCOMP_PARAMS 98h
1Ch MC_CHANNEL_0_ODT_PARAMS1 9Ch
20h MC_CHANNEL_0_ODT_PARAMS2 A0h
24h MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_RD A4h
28h MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_RD A8h
SID SVID 2Ch MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_WR ACh
30h MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_WR B0h
34h MC_CHANNEL_0_WAQ_PARAMS B4h
38h MC_CHANNEL_0_SCHEDULER_PARAMS B8h
3Ch MC_CHANNEL_0_MAINTENANCE_OPS BCh
40h MC_CHANNEL_0_TX_BG_SETTINGS C0h
44h C4h
48h MC_CHANNEL_0_RX_BGF_SETTINGS C8h
4Ch MC_CHANNEL_0_EW_BGF_SETTINGS CCh
MC_CHANNEL_0_DIMM_RESET_CMD 50h MC_CHANNEL_0_EW_BGF_OFFSET_SETTINGS D0h
MC_CHANNEL_0_DIMM_INIT_CMD 54h MC_CHANNEL_0_ROUND_TRIP_LATENCY D4h
MC_CHANNEL_0_DIMM_INIT_PARAMS 58h MC_CHANNEL_0_PAGETABLE_PARAMS1 D8h
MC_CHANNEL_0_DIMM_INIT_STATUS 5Ch DCh
MC_CHANNEL_0_DDR3CMD 60h MC_TX_BG_CMD_DATA_RATIO_SETTING_CH0 E0h
64h MC_TX_BG_CMD_OFFSET_SETTINGS_CH0 E4h
MC_CHANNEL_0_REFRESH_THROTTLE_SUPPORT 68h MC_TX_BG_DATA_OFFSET_SETTINGS_CH0 E8h
6Ch ECh
MC_CHANNEL_0_MRS_VALUE_0_1 70h MC_CHANNEL_0_ADDR_MATCH F0h
MC_CHANNEL_0_MRS_VALUE_2 74h F4h
78h MC_CHANNEL_0_ECC_ERROR_MASK F8h
MC_CHANNEL_0_RANK_PRESENT 7Ch MC_CHANNEL_0_ECC_ERROR_INJECT FCh
Register Description
34 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-13. Device 4, Function 1: Integrated Memory Controller Channel 0
Address Registers
DID VID 00h MC_SAG_CH0_0 80h
PCISTS PCICMD 04h MC_SAG_CH0_1 84h
CCR RID 08h MC_SAG_CH0_2 88h
HDR 0Ch MC_SAG_CH0_3 8Ch
10h MC_SAG_CH0_4 90h
14h MC_SAG_CH0_5 94h
18h MC_SAG_CH0_6 98h
1Ch MC_SAG_CH0_7 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_DOD_CH0_0 48h C8h
MC_DOD_CH0_1 4Ch CCh
MC_DOD_CH0_2 50h D0h
54h D4h
58h D8h
5Ch DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 35
Register Description
Table 2-14. Device 4, Function 2: Integrated Memory Controller Channel 0
Rank Registers
DID VID 00h MC_RIR_WAY_CH0_0 80h
PCISTS PCICMD 04h MC_RIR_WAY_CH0_1 84h
CCR RID 08h MC_RIR_WAY_CH0_2 88h
HDR 0Ch MC_RIR_WAY_CH0_3 8Ch
10h MC_RIR_WAY_CH0_4 90h
14h MC_RIR_WAY_CH0_5 94h
18h MC_RIR_WAY_CH0_6 98h
1Ch MC_RIR_WAY_CH0_7 9Ch
20h MC_RIR_WAY_CH0_8 A0h
24h MC_RIR_WAY_CH0_9 A4h
28h MC_RIR_WAY_CH0_10 A8h
SID SVID 2Ch MC_RIR_WAY_CH0_11 ACh
30h MC_RIR_WAY_CH0_12 B0h
34h MC_RIR_WAY_CH0_13 B4h
38h MC_RIR_WAY_CH0_14 B8h
3Ch MC_RIR_WAY_CH0_15 BCh
MC_RIR_LIMIT_CH0_0 40h MC_RIR_WAY_CH0_16 C0h
MC_RIR_LIMIT_CH0_1 44h MC_RIR_WAY_CH0_17 C4h
MC_RIR_LIMIT_CH0_2 48h MC_RIR_WAY_CH0_18 C8h
MC_RIR_LIMIT_CH0_3 4Ch MC_RIR_WAY_CH0_19 CCh
MC_RIR_LIMIT_CH0_4 50h MC_RIR_WAY_CH0_20 D0h
MC_RIR_LIMIT_CH0_5 54h MC_RIR_WAY_CH0_21 D4h
MC_RIR_LIMIT_CH0_6 58h MC_RIR_WAY_CH0_22 D8h
MC_RIR_LIMIT_CH0_7 5Ch MC_RIR_WAY_CH0_23 DCh
60h MC_RIR_WAY_CH0_24 E0h
64h MC_RIR_WAY_CH0_25 E4h
68h MC_RIR_WAY_CH0_26 E8h
6Ch MC_RIR_WAY_CH0_27 ECh
70h MC_RIR_WAY_CH0_28 F0h
74h MC_RIR_WAY_CH0_29 F4h
78h MC_RIR_WAY_CH0_30 F8h
7Ch MC_RIR_WAY_CH0_31 FCh
Register Description
36 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-15. Device 4, Function 3: Integrated Memory Controller Channel 0
Thermal Control Registers
DID VID 00h MC_COOLING_COEF0 80h
PCISTS PCICMD 04h MC_CLOSED_LOOP0 84h
CCR RID 08h MC_THROTTLE_OFFSET0 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h MC_RANK_VIRTUAL_TEMP0 98h
1Ch MC_DDR_THERM_COMMAND0 9Ch
20h A0h
24h MC_DDR_THERM_STATUS0 A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_THERMAL_CONTROL0 48h C8h
MC_THERMAL_STATUS0 4Ch CCh
MC_THERMAL_DEFEATURE0 50h D0h
54h D4h
58h D8h
5Ch DCh
MC_THERMAL_PARAMS_A0 60h E0h
MC_THERMAL_PARAMS_B0 64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 37
Register Description
Table 2-16. Device 5, Function 0: Integrated Memory Controller Channel 1
Control Registers
DID VID 00h MC_CHANNEL_1_RANK_TIMING_A 80h
PCISTS PCICMD 04h MC_CHANNEL_1_RANK_TIMING_B 84h
CCR RID 08h MC_CHANNEL_1_BANK_TIMING 88h
HDR 0Ch MC_CHANNEL_1_REFRESH_TIMING 8Ch
10h MC_CHANNEL_1_CKE_TIMING 90h
14h MC_CHANNEL_1_ZQ_TIMING 94h
18h MC_CHANNEL_1_RCOMP_PARAMS 98h
1Ch MC_CHANNEL_1_ODT_PARAMS1 9Ch
20h MC_CHANNEL_1_ODT_PARAMS2 A0h
24h MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_RD A4h
28h MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_RD A8h
SID SVID 2Ch MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_WR ACh
30h MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_WR B0h
34h MC_CHANNEL_1_WAQ_PARAMS B4h
38h MC_CHANNEL_1_SCHEDULER_PARAMS B8h
3Ch MC_CHANNEL_1_MAINTENANCE_OPS BCh
40h MC_CHANNEL_1_TX_BG_SETTINGS C0h
44h C4h
48h MC_CHANNEL_1_RX_BGF_SETTINGS C8h
4Ch MC_CHANNEL_1_EW_BGF_SETTINGS CCh
MC_CHANNEL_1_DIMM_RESET_CMD 50h MC_CHANNEL_1_EW_BGF_OFFSET_SETTINGS D0h
MC_CHANNEL_1_DIMM_INIT_CMD 54h MC_CHANNEL_1_ROUND_TRIP_LATENCY D4h
MC_CHANNEL_1_DIMM_INIT_PARAMS 58h MC_CHANNEL_1_PAGETABLE_PARAMS1 D8h
MC_CHANNEL_1_DIMM_INIT_STATUS 5Ch DCh
MC_CHANNEL_1_DDR3CMD 60h MC_TX_BG_CMD_DATA_RATIO_SETTING_CH1 E0h
64h MC_TX_BG_CMD_OFFSET_SETTINGS_CH1 E4h
MC_CHANNEL_1_REFRESH_THROTTLE_SUPPORT 68h MC_TX_BG_DATA_OFFSET_SETTINGS_CH1 E8h
6Ch ECh
MC_CHANNEL_1_MRS_VALUE_0_1 70h MC_CHANNEL_1_ADDR_MATCH F0h
MC_CHANNEL_1_MRS_VALUE_2 74h F4h
78h MC_CHANNEL_1_ECC_ERROR_MASK F8h
MC_CHANNEL_1_RANK_PRESENT 7Ch MC_CHANNEL_1_ECC_ERROR_INJECT FCh
Register Description
38 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-17. Device 5, Function 1: Integrated Memory Controller Channel 1
Address Registers
DID VID 00h MC_SAG_CH1_0 80h
PCISTS PCICMD 04h MC_SAG_CH1_1 84h
CCR RID 08h MC_SAG_CH1_2 88h
HDR 0Ch MC_SAG_CH1_3 8Ch
10h MC_SAG_CH1_4 90h
14h MC_SAG_CH1_5 94h
18h MC_SAG_CH1_6 98h
1Ch MC_SAG_CH1_7 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_DOD_CH1_0 48h C8h
MC_DOD_CH1_1 4Ch CCh
MC_DOD_CH1_2 50h D0h
54h D4h
58h D8h
5Ch DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 39
Register Description
Table 2-18. Device 5, Function 2: Integrated Memory Controller Channel 1
Rank Registers
DID VID 00h MC_RIR_WAY_CH1_0 80h
PCISTS PCICMD 04h MC_RIR_WAY_CH1_1 84h
CCR RID 08h MC_RIR_WAY_CH1_2 88h
HDR 0Ch MC_RIR_WAY_CH1_3 8Ch
10h MC_RIR_WAY_CH1_4 90h
14h MC_RIR_WAY_CH1_5 94h
18h MC_RIR_WAY_CH1_6 98h
1Ch MC_RIR_WAY_CH1_7 9Ch
20h MC_RIR_WAY_CH1_8 A0h
24h MC_RIR_WAY_CH1_9 A4h
28h MC_RIR_WAY_CH1_10 A8h
SID SVID 2Ch MC_RIR_WAY_CH1_11 ACh
30h MC_RIR_WAY_CH1_12 B0h
34h MC_RIR_WAY_CH1_13 B4h
38h MC_RIR_WAY_CH1_14 B8h
3Ch MC_RIR_WAY_CH1_15 BCh
MC_RIR_LIMIT_CH1_0 40h MC_RIR_WAY_CH1_16 C0h
MC_RIR_LIMIT_CH1_1 44h MC_RIR_WAY_CH1_17 C4h
MC_RIR_LIMIT_CH1_2 48h MC_RIR_WAY_CH1_18 C8h
MC_RIR_LIMIT_CH1_3 4Ch MC_RIR_WAY_CH1_19 CCh
MC_RIR_LIMIT_CH1_4 50h MC_RIR_WAY_CH1_20 D0h
MC_RIR_LIMIT_CH1_5 54h MC_RIR_WAY_CH1_21 D4h
MC_RIR_LIMIT_CH1_6 58h MC_RIR_WAY_CH1_22 D8h
MC_RIR_LIMIT_CH1_7 5Ch MC_RIR_WAY_CH1_23 DCh
60h MC_RIR_WAY_CH1_24 E0h
64h MC_RIR_WAY_CH1_25 E4h
68h MC_RIR_WAY_CH1_26 E8h
6Ch MC_RIR_WAY_CH1_27 ECh
70h MC_RIR_WAY_CH1_28 F0h
74h MC_RIR_WAY_CH1_29 F4h
78h MC_RIR_WAY_CH1_30 F8h
7Ch MC_RIR_WAY_CH1_31 FCh
Register Description
40 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-19. Device 5, Function 3: Integrated Memory Controller Channel 1
Thermal Control Registers
DID VID 00h MC_COOLING_COEF1 80h
PCISTS PCICMD 04h MC_CLOSED_LOOP1 84h
CCR RID 08h MC_THROTTLE_OFFSET1 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h MC_RANK_VIRTUAL_TEMP1 98h
1Ch MC_DDR_THERM_COMMAND1 9Ch
20h A0h
24h MC_DDR_THERM_STATUS1 A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_THERMAL_CONTROL1 48h C8h
MC_THERMAL_STATUS1 4Ch CCh
MC_THERMAL_DEFEATURE1 50h D0h
54h D4h
58h D8h
5Ch DCh
MC_THERMAL_PARAMS_A1 60h E0h
MC_THERMAL_PARAMS_B1 64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 41
Register Description
Table 2-20. Device 6, Function 0: Integrated Memory Controller Channel 2
Control Registers
DID VID 00h MC_CHANNEL_2_RANK_TIMING_A 80h
PCISTS PCICMD 04h MC_CHANNEL_2_RANK_TIMING_B 84h
CCR RID 08h MC_CHANNEL_2_BANK_TIMING 88h
HDR 0Ch MC_CHANNEL_2_REFRESH_TIMING 8Ch
10h MC_CHANNEL_2_CKE_TIMING 90h
14h MC_CHANNEL_2_ZQ_TIMING 94h
18h MC_CHANNEL_2_RCOMP_PARAMS 98h
1Ch MC_CHANNEL_2_ODT_PARAMS1 9Ch
20h MC_CHANNEL_2_ODT_PARAMS2 A0h
24h MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_RD A4h
28h MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_RD A8h
SID SVID 2Ch MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_WR ACh
30h MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_WR B0h
34h MC_CHANNEL_2_WAQ_PARAMS B4h
38h MC_CHANNEL_2_SCHEDULER_PARAMS B8h
3Ch MC_CHANNEL_2_MAINTENANCE_OPS BCh
40h MC_CHANNEL_2_TX_BG_SETTINGS C0h
44h C4h
48h MC_CHANNEL_2_RX_BGF_SETTINGS C8h
4Ch MC_CHANNEL_2_EW_BGF_SETTINGS CCh
MC_CHANNEL_2_DIMM_RESET_CMD 50h MC_CHANNEL_2_EW_BGF_OFFSET_SETTINGS D0h
MC_CHANNEL_2_DIMM_INIT_CMD 54h MC_CHANNEL_2_ROUND_TRIP_LATENCY D4h
MC_CHANNEL_2_DIMM_INIT_PARAMS 58h MC_CHANNEL_2_PAGETABLE_PARAMS1 D8h
MC_CHANNEL_2_DIMM_INIT_STATUS 5Ch DCh
MC_CHANNEL_2_DDR3CMD 60h MC_TX_BG_CMD_DATA_RATIO_SETTING_CH2 E0h
64h MC_TX_BG_CMD_OFFSET_SETTINGS_CH2 E4h
MC_CHANNEL_2_REFRESH_THROTTLE_SUPPORT 68h MC_TX_BG_DATA_OFFSET_SETTINGS_CH2 E8h
6Ch ECh
MC_CHANNEL_2_MRS_VALUE_0_1 70h MC_CHANNEL_2_ADDR_MATCH F0h
MC_CHANNEL_2_MRS_VALUE_2 74h F4h
78h MC_CHANNEL_2_ECC_ERROR_MASK F8h
MC_CHANNEL_2_RANK_PRESENT 7Ch MC_CHANNEL_2_ECC_ERROR_INJECT FCh
Register Description
42 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-21. Device 6, Function 1: Integrated Memory Controller Channel 2
Address Registers
DID VID 00h MC_SAG_CH2_0 80h
PCISTS PCICMD 04h MC_SAG_CH2_1 84h
CCR RID 08h MC_SAG_CH2_2 88h
HDR 0Ch MC_SAG_CH2_3 8Ch
10h MC_SAG_CH2_4 90h
14h MC_SAG_CH2_5 94h
18h MC_SAG_CH2_6 98h
1Ch MC_SAG_CH2_7 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_DOD_CH2_0 48h C8h
MC_DOD_CH2_1 4Ch CCh
MC_DOD_CH2_2 50h D0h
54h D4h
58h D8h
5Ch DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 43
Register Description
Table 2-22. Device 6, Function 2: Integrated Memory Controller Channel 2
Rank Registers
DID VID 00h MC_RIR_WAY_CH2_0 80h
PCISTS PCICMD 04h MC_RIR_WAY_CH2_1 84h
CCR RID 08h MC_RIR_WAY_CH2_2 88h
HDR 0Ch MC_RIR_WAY_CH2_3 8Ch
10h MC_RIR_WAY_CH2_4 90h
14h MC_RIR_WAY_CH2_5 94h
18h MC_RIR_WAY_CH2_6 98h
1Ch MC_RIR_WAY_CH2_7 9Ch
20h MC_RIR_WAY_CH2_8 A0h
24h MC_RIR_WAY_CH2_9 A4h
28h MC_RIR_WAY_CH2_10 A8h
SID SVID 2Ch MC_RIR_WAY_CH2_11 ACh
30h MC_RIR_WAY_CH2_12 B0h
34h MC_RIR_WAY_CH2_13 B4h
38h MC_RIR_WAY_CH2_14 B8h
3Ch MC_RIR_WAY_CH2_15 BCh
MC_RIR_LIMIT_CH2_0 40h MC_RIR_WAY_CH2_16 C0h
MC_RIR_LIMIT_CH2_1 44h MC_RIR_WAY_CH2_17 C4h
MC_RIR_LIMIT_CH2_2 48h MC_RIR_WAY_CH2_18 C8h
MC_RIR_LIMIT_CH2_3 4Ch MC_RIR_WAY_CH2_19 CCh
MC_RIR_LIMIT_CH2_4 50h MC_RIR_WAY_CH2_20 D0h
MC_RIR_LIMIT_CH2_5 54h MC_RIR_WAY_CH2_21 D4h
MC_RIR_LIMIT_CH2_6 58h MC_RIR_WAY_CH2_22 D8h
MC_RIR_LIMIT_CH2_7 5Ch MC_RIR_WAY_CH2_23 DCh
60h MC_RIR_WAY_CH2_24 E0h
64h MC_RIR_WAY_CH2_25 E4h
68h MC_RIR_WAY_CH2_26 E8h
6Ch MC_RIR_WAY_CH2_27 ECh
70h MC_RIR_WAY_CH2_28 F0h
74h MC_RIR_WAY_CH2_29 F4h
78h MC_RIR_WAY_CH2_30 F8h
7Ch MC_RIR_WAY_CH2_31 FCh
Register Description
44 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Table 2-23. Device 6, Function 3: Integrated Memory Controller Channel 2
Thermal Control Registers
DID VID 00h MC_COOLING_COEF2 80h
PCISTS PCICMD 04h MC_CLOSED_LOOP2 84h
CCR RID 08h MC_THROTTLE_OFFSET2 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h MC_RANK_VIRTUAL_TEMP2 98h
1Ch MC_DDR_THERM_COMMAND2 9Ch
20h A0h
24h MC_DDR_THERM_STATUS2 A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
MC_THERMAL_CONTROL2 48h C8h
MC_THERMAL_STATUS2 4Ch CCh
MC_THERMAL_DEFEATURE2 50h D0h
54h D4h
58h D8h
5Ch DCh
MC_THERMAL_PARAMS_A2 60h E0h
MC_THERMAL_PARAMS_B2 64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 45
Register Description
2.5 PCI Standard Registers
These registers appear in every function for every device.
2.5.1 VID - Vendor Identification Register
The VID Register contains the vendor identification number. This 16-bit register,
combined with the Device Identification Register uniquely identifies the manufacturer
of the function within the processor. Writes to this register have no effect.
2.5.2 DID - Device Identification Register
This 16-bit register combined with the Vendor Identification register uniquely identifies
the Function within the processor. Writes to this register have no effect. See Table 2-1
for the DID of each processor function.
Device: 0
Function: 0-1
Offset: 00h
Device: 2
Function: 0-1, 4-5
Offset: 00h
Device: 3
Function: 0-2, 4
Offset: 00h
Device: 4-6
Function: 0-3
Offset: 00h
Bit Type Reset
Value Description
15:0 RO 8086h Vendor Identification Number
The value assigned to Intel.
Device: 0
Function: 0-1
Offset: 02h
Device: 2
Function: 0-1, 4-5
Offset: 02h
Device: 3
Function: 0-2, 4
Offset: 02h
Device: 4-6
Function: 0-3
Offset: 02h
Bit Type Reset
Value Description
15:0 RO *See
Table 2-1 Device Identification Number
Identifies each function of the processor.
Register Description
46 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.5.3 RID - Revision Identification Register
This register contains the revision number of the processor. The Revision ID (RID) is a
traditional 8-bit Read Only (RO) register located at offset 08h in the standard PCI
header of every PCI/PCI Express compatible device and function.
2.5.4 CCR - Class Code Register
This register contains the Class Code for the device. Writes to this register have no
effect.
Device: 0
Function: 0-1
Offset: 08h
Device: 2
Function: 0-1, 4-5
Offset: 08h
Device: 3
Function: 0-2, 4
Offset: 08h
Device: 4-6
Function: 0-3
Offset: 08h
Bit Type Reset
Value Description
7:0 RO 0h Revision Identification Number
0: A Stepping
1: A Stepping
2: B Stepping
4: C Stepping
5: D Stepping
Others: RSVD
Device: 0
Function: 0-1
Offset: 09h
Device: 2
Function: 0-1, 4-5
Offset: 09h
Device: 3
Function: 0-2, 4
Offset: 09h
Device: 4-6
Function: 0-3
Offset: 09h
Bit Type Reset
Value Description
23:16 RO 06h Base Class.
This field indicates the general device category. For the processor, this field is
hardwired to 06h, indicating it is a “Bridge Device”.
15:8 RO 0 Sub-Class.
This field qualifies the Base Class, providing a more detailed specification of
the device function.
For all devices the default is 00h, indicating “Host Bridge”.
7:0 RO 0 Register-Level Programming Interface.
This field identifies a specific programming interface (if any), that device
independent software can use to interact with the device. There are no such
interfaces defined for “Host Bridge” types, and this field is hardwired to 00h.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 47
Register Description
2.5.5 HDR - Header Type Register
This register identifies the header layout of the configuration space.
2.5.6 SID/SVID - Subsystem Identity/Subsystem Vendor
Identification Register
This register identifies the manufacturer of the system. This 32-bit register uniquely
identifies any PCI device.
Device: 0
Function: 0-1
Offset: 0Eh
Device: 2
Function: 0-1, 4-5
Offset: 0Eh
Device: 3
Function: 0-2, 4
Offset: 0Eh
Device: 4-6
Function: 0-3
Offset: 0Eh
Bit Type Reset
Value Description
7 RO 1 Multi-function Device.
Selects whether this is a multi-function device, that may have alternative
configuration layouts. This bit is hardwired to ‘1’ for devices in the processor.
6:0 RO 0 Configuration Layout.
This field identifies the format of the configuration header layout for a PCI-to-
PCI bridge from bytes 10h through 3Fh.
For all devices the default is 00h, indicating a conventional type 00h PCI header.
Device: 0
Function: 0-1
Offset: 2Ch, 2Eh
Device: 2
Function: 0-1, 4-5
Offset: 2Ch, 2Eh
Device: 3
Function: 0-2, 4
Offset: 2Ch, 2Eh
Device: 4-6
Function: 0-3
Offset: 2Ch, 2Eh
Access as a Dword
Bit Type Reset
Value Description
31:16 RWO 8086h Subsystem Identification Number:
The default value specifies Intel
15:0 RWO 8086h Vendor Identification Number.
The default value specifies Intel.
Register Description
48 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.5.7 PCICMD - Command Register
This register defines the PCI 3.0 compatible command register values applicable to PCI
Express space.
Device: 0
Function: 0-1
Offset: 04h
Device: 2
Function: 0-1, 4-5
Offset: 04h
Device: 3
Function: 0-2, 4
Offset: 04h
Device: 4-6
Function: 0-3
Offset: 04h
Bit Type Reset
Value Description
15:11 RV 0 Reserved. (by PCI SIG)
10 RO 0 INTxDisable: Interrupt Disable
Controls the ability of the PCI Express port to generate INTx messages.
If this device does not generate interrupts then this bit is not implemented and
is RO.
If this device generates interrupts then this bit is RW and this bit disables the
device/function from asserting INTx#. A value of 0 enables the assertion of its
INTx# signal. A value of 1 disables the assertion of its INTx# signal.
1: Legacy Interrupt mode is disabled
0: Legacy Interrupt mode is enabled
9 RO 0 FB2B: Fast Back-to-Back Enable
This bit controls whether or not the master can do fast back-to-back writes.
Since this device is strictly a target this bit is not implemented. This bit is
hardwired to 0. Writes to this bit position have no effect.
8 RO 0 SERRE: SERR Message Enable
This bit is a global enable bit for this devices SERR messaging. This host bridge
will not implement SERR messaging. This bit is hardwired to 0. Writes to this bit
position have no effect.If SERR is used for error generation, then this bit must
be RW and enable/disable SERR signaling.
7 RO 0 IDSELWCC: IDSEL Stepping/Wait Cycle Control
Per PCI 2.3 spec this bit is hardwired to 0. Writes to this bit position have no
effect.
6 RO 0 PERRE: Parity Error Response Enable
Parity error is not implemented in this host bridge. This bit is hardwired to “0”.
Writes to this bit position have no effect.
5 RO 0 VGAPSE: VGA palette snoop Enable
This host bridge does not implement this bit. This bit is hardwired to a “0”.
Writes to this bit position have no effect.
4 RO 0 MWIEN: Memory Write and Invalidate Enable
This host bridge will never issue memory write and invalidate commands. This
bit is therefore hardwired to “0”. Writers to this bit position will have no effect.
3 RO 0 SCE: Special Cycle Enable
This host bridge does not implement this bit. This bit is hardwired to a “0”.
Writers to this bit position will have no effect.
2 RO 1 BME: Bus Master Enable
This host bridge is always enabled as a master. This bit is hardwired to a “1”.
Writes to this bit position have no effect.
1 RO 1 MSE: Memory Space Enable
This host bridge always allows access to main memory. This bit is not
implemented and is hardwired to “1”. Writes to this bit position have no effect.
0 RO 0 IOAE: Access Enable
This bit is not implemented in this host bridge and is hardwired to “0”. Writes to
this bit position have no effect.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 49
Register Description
2.5.8 PCISTS - PCI Status Register
The PCI Status register is a 16-bit status register that reports the occurrence of various
error events on this device's PCI interface.
Device: 0
Function: 0-1
Offset: 06h
Device: 2
Function: 0-1, 4-5
Offset: 06h
Device: 3
Function: 0-2, 4
Offset: 06h
Device: 4-6
Function: 0-3
Offset: 06h
Bit Type Reset
Value Description
15 RO 0 Detect Parity Error (DPE)
The host bridge does not implement this bit and is hardwired to a “0”. Writes to
this bit position have no effect.
14 RO 0 Signaled System Error (SSE)
This bit is set to 1 when this device generates an SERR message over the bus
for any enabled error condition. If the host bridge does not signal errors using
this bit, this bit is hardwired to a “0” and is read-only. Writes to this bit position
have no effect.
13 RO 0 Received Master Abort Status (RMAS)
This bit is set when this device generates request that receives an Unsupported
Request completion packet. Software clears the bit by writing 1 to it.
If this device does not receive Unsupported Request completion packets, the bit
is hardwired to “0” and is read-only. Writes to this bit position have no effect.
12 RO 0 Received Target Abort Status (RTAS)
This bit is set when this device generates a request that receives a Completer
Abort completion packet. Software clears this bit by writing a 1 to it.
If this device does not receive Completer Abort completion packets, this bit is
hardwired to “0” and read-only. Writes to this bit position have no effect.
11 RO 0 Signaled Target Abort Status (STAS)
This device will not generate a Target Abort completion or Special Cycle. This bit
is not implemented in this device and is hardwired to a “0”. Writes to this bit
position have no effect.
10:9 RO 0 DEVSEL Timing (DEVT)
These bits are hardwired to “00”. Writes to these bit positions have no effect.
This device does not physically connect to PCI bus X. These bits are set to “00”
(fast decode) so that optimum DEVSEL timing for PCI bus X is not limited by this
device.
8 RO 0 Master Data Parity Error Detected (DPD)
PERR signaling and messaging are not implemented by this bridge, therefore
this bit is hardwired to “0”. Writes to this bit position have no effect.
7 RO 1 Fast Back-to-Back (FB2B)
This bit is hardwired to “1”. Writes to this bit position have no effect. This device
is not physically connected to a PCI bus. This bit is set to 1 (indicating back-to-
back capabilities) so that the optimum setting for this PCI bus is not limited by
this device.
6 RO 0 Reserved
5 RO 0 66 MHz Capable
Does not apply to PCI Express. Must be hardwired to “0”.
Register Description
50 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.6 Generic Non-core Registers
2.6.1 MAXREQUEST_LC
Maximum requests expected from the chipset (number of TAD home trackers allocated
to chipset). The maximum RTID value that may be used is one less than this number.
Home trackers are allocated in groups of 8, so bits 2:0 of the register may not be
written, and bits 5:3 indicate how many groups of 8 are allocated.
4 RO TBD Capability List (CLIST)
This bit is hardwired to “1” to indicate to the configuration software that this
device/function implements a list of new capabilities. A list of new capabilities is
accessed via registers CAPPTR at the configuration address offset 34h from the
start of the PCI configuration space header of this function. Register CAPPTR
contains the offset pointing to the start address with configuration space of this
device where the capability register resides. This bit must be set for a PCI
Express device or if the VSEC capability.
If no capability structures are implemented, this bit is hardwired to 0.
3 RO 0 Interrupt Status:
If this device generates an interrupt, then this read-only bit reflects the state of
the interrupt in the device/function. Only when the Interrupt Disable bit in the
command register is a 0 and this Interrupt Status bit is a 1, will the
device’s/function’s INTx# signal be asserted. Setting the Interrupt Disable bit to
a 1 has no effect on the state of this bit.
If this device does not generate interrupts, then this bit is not implemented (RO
and reads returns 0).
2:0 RO 0 Reserved
Device: 0
Function: 0-1
Offset: 06h
Device: 2
Function: 0-1, 4-5
Offset: 06h
Device: 3
Function: 0-2, 4
Offset: 06h
Device: 4-6
Function: 0-3
Offset: 06h
Bit Type Reset
Value Description
Device: 0
Function: 0
Offset: 40h
Access as a Dword
Bit Type Reset
Value Description
5:3 RW 3 VALUE. Maximum TAD requests from chipset (allocated in groups of 8).
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 51
Register Description
2.6.2 MAXREQUEST_LS
Maximum requests expected from the sibling (number of TAD home trackers allocated
to sibling). The maximum RTID value that may be used is one less than this number.
Home Trackers are allocated in groups of 8, so bits 2:0 of the register may not be
written, and bits 5:3 indicate how many groups of 8 are allocated.
2.6.3 MAXREQUEST_LL
Maximum requests expected from local accesses (number of TAD home trackers
allocated to the local queue). The maximum RTID value that may be used is one less
than this number. Home Trackers are allocated in groups of 8, so bits 2:0 of the register
may not be written, and bits 5:3 indicate how many groups of 8 are allocated.
2.6.4 MAX_RTIDS
Maximum number of RTIDs other homes have. How many requests can this caching
agent send to the other home agents. This number is one more than the highest
numbered RTID to use. Note these values reset to 2, and need to be increased by BIOS
to whatever the home agents can support.
Device: 0
Function: 0
Offset: 44h
Access as a Dword
Bit Type Reset
Value Description
5:3 RW 2 VALUE. Maximum TAD requests from sibling (allocated in groups of 8).
Device: 0
Function: 0
Offset: 48h
Access as a Dword
Bit Type Reset
Value Description
5:3 RW 3 VALUE. Maximum TAD requests from local accesses (allocated in groups of
8).
Device: 0
Function: 0
Offset: 60h
Access as a Dword
Bit Type Reset
Value Description
21:16 RW 2 LOCAL_MC. Maximum number of RTIDs for the local home agent.
13:8 RW 2 SIBLING. Maximum number of RTIDs for the sibling home agent.
5:0 RW 2 CHIPSET. Maximum number of RTIDs for the IOH home agent.
Register Description
52 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.6.5 DESIRED_CORES
Number of cores, threads BIOS wants to exist on the next reset. A processor reset
must be used for this register to take affect. Note programing this register to a value
higher than the product has cores, should not be done. Which cores are removed is not
defined and is implementation dependent. This does not result in all of the power
savings of a reduced number of core product, but does save more power than even the
deepest sleep state.
.
2.6.6 MEMLOCK_STATUS
Status register for various Memory and Control Register functions that can be locked
down.
Device: 0
Function: 0
Offset: 80h
Access as a Dword
Bit Type Reset
Value Description
16 RW1S 0 LOCK. Once written to 1, changes to this register cannot be made.
8 RWL 0 MT_DISABLE. Disables multi-threading (2 logical threads per core) in all
cores if set to 1.
1:0 RWL 0 CORE_COUNT.
00: max number (default value)
01 - 1 core
10 - 2 cores
Device: 0
Function: 0
Offset: 88h
Access as a Dword
Bit Type Reset
Value Description
9 RO - MEM_LOCKED_REMOTE. Any access to local memory from another agent
(i.e. everybody but this processor) is aborted. Can only be unlocked when in
Authenticated Code Mode.
8 RO - MEM_LOCKED_LOCAL. Any Access to local memory from this processor is
aborted. Can only be unlocked when in Authenticated Code Mode.
1 RO - MEM_CFG_USER_LOCKED. Locks same as MEM_CFG_LOCKED but user
controlled lockable by MC_CFG_CONTROL; unlockable via MC_CFG_CONTROL
csr(0x0090).
0 RO - MEM_CFG_LOCKED. All Configuration registers dealing with memory and
address programming are locked down and cannot be changed. This includes all
registers in Device 3 Function [0,1], Device 4,5,6 Function 0, Device 4,5,6
Function 1, Device 4,5,6 Function 2, and most registers in Device 0 Function 1.
But does not include the memory controller thermal registers, or
SAD_PAM0123, SAD_PAM456, SAD_SMRAM registers.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 53
Register Description
2.6.7 MC_CFG_CONTROL
This register locks and unlocks write access to the Uncore configuration. BIOS must
write a “1” to the MC_CFG_LOCK bit after reset to allow the Integrated Memory
Controller to start accepting requests. It may subsequently be unlocked by writing a
“1” to the MC_CFG_UNLOCK bit and a “0” to the MC_CFG_LOCK bit without affecting
memory traffic.
2.6.8 POWER_CNTRL_ERR_STATUS
Power management Error Status register.
Device: 0
Function: 0
Offset: 90h
Access as a Dword
Bit Type Reset
Value Description
1 WO 0 MC_CFG_UNLOCK. Unlocks Integrated Memory Controller configuration
registers without CPU reset. This bit does NOT unlock any other lock type
without a CPU reset.
0 WO 0 MC_CFG_LOCK. Locks Integrated Memory Controller configuration registers.
Writes are no longer allowed to the configuration registers.
Device: 0
Function: 0
Offset: B0h
Access as a Qword
Bit Type Reset
Value Description
63 RO - VAL. MC7_STATUS Register Valid. Indicates if the register is valid.
0: Not Valid
1: Valid
62 RO - OVER. Machine Check Overflow Flag. Indicates (when set) that a
machine-check error occurred while the results of a previous error were still
in the error-reporting register bank (that is, the VAL bit was already set in
the IA32_MC7_STATUS register). The processor sets the OVER flag and
software is responsible for clearing it. In general, enabled errors are written
over disabled errors, and uncorrected errors are written over corrected
errors. Uncorrected errors are not written over previous valid uncorrected
errors.
0: No Overflow
1: Overflow
61 RO - UC. Error Uncorrected Flag. Indicates (when set) that the processor did not
or was not able to correct the error condition. When cleared, this flag
indicates that the processor was able to correct the error condition.
0: Corrected
1: Uncorrected
60 RO - EN. Error Enabled Flag. Indicates (when set) that the error was enabled by
the associated EEj bit of the IA32_MC7_CTL register.
0: Not Enabled
1: Enabled
Register Description
54 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.6.9 CURRENT_UCLK_RATIO
Status Register reporting the current Uncore Clk Ratio relative to BCLK (133Mhz). This
is the clock in which the Last Level Cache (LLC) runs.
59 RO - MISCV. IA32_MC7_MISC. Register Valid Flag. Indicates (when set) that
the IA32_MC7_MISC register contains additional information regarding the
error. When clear, this flag indicates that the IA32_MC7_MISC register is
either not implemented or does not contain additional information regarding
the error. Do not read these registers if they are not implemented in the
processor.
58 RO - ADDRV. IA32_MC7_ADDR. Register Valid Flag. Indicates (when set) that
the IA32_MC7_ADDR register contains the address where the error occurred.
When clear , this flag indicates that the IA32_MC7_ADDR register is either
not implemented or does not contain the address where the error occurred.
Do not read these registers if they are not implemented in the processor.
57 RO - PCC. Processor context corrupt flag. Indicates (when set) that the state of
the processor might have been corrupted by the error condition detected
and that reliable restarting of the processor may not be possible. When
cleared, this flag indicates that the error did not affect the processor’s state.
0: Not Corrupt
1: Corrupt
56:32 - - RSVD.
31:16 RO - MODEL SPECIFIC ERROR CODE. Specifies the model specific error code
that uniquely identifies the machine-check error condition detected. The
following list describes the error codes that may be found on the processor.
0x0000: No Error
0x0300: Unexpected reset error. Processor boot failed.
0x0800: PMReq or CmpD received was illegal in the current context.
0x0A00: Illegal PMReq request detected under S3, S4 or S5.
0x0D00: Invalid S-state transition requested.
0x1100: Platform / CPU VID controller mismatch. Processor boot failed.
0x1A00: Platform / CPU MSID mismatch. Processor boot failed.
0x2000: QPI training error.
15:0 RO - MCA ERROR CODE FIELD. Specifies the machine-check architecture-
defined error code for the machine-check error condition detected. The
machine-check architecture-defined error codes are guaranteed to be the
same for all IA-32 processors that implement the machine-check
architecture.
See Section 14.7 of the Software Developers Manual, Vol 3A, “Interpreting
the MCA Error Codes,” and Appendix E, “Interpreting Machine-Check Error
Codes”, for information on machine-check error codes.
Device: 0
Function: 0
Offset: B0h
Access as a Qword
Device: 0
Function: 0
Offset: C0h
Access as a Dword
Bit Type Reset
Value Description
15 RW 0 RSVD.
14:8 RW 12 RSVD.
6:0 RO - UCLK. The current UCLK ratio
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 55
Register Description
2.6.10 MIRROR_PORT_CTL
Mirror Port physical layer control register.
.
2.6.11 MIP_PH_CTR_L0
MIP_PH_CTR_L1
Mirror Port Physical Layer Control Register.
.
Device: 0
Function: 0
Offset: D0h
Access as a Dword
Bit Type Reset
Value Description
7 RW 0 SPARE. Spare MiP control register bits.
6 RW 0 DSBL_ENH_MPRX_SYNC. When set, it disables the enhancing
synchronization scheme for the MiP_Rx.
5 RW 0 MIP_GO_10. When set, the Mip_Tx and Mip_Rx go to L0 directly from
Config_FlitLock.
4 RW 0 MIP_RX_CRC_SQUASH. When set, replaces CRC errors with CRC special
packet on MiP Rx.
3 RW 0 MIP_RX_PORT_SEL. Port select for MiP Rx. _PORT_SEL0=QPI Port 0.
_PORT_SEL1=QPI Port 1.
2 RW 0 MIP_TX_PORT_SEL. Port select for MiP Tx. _PORT_SEL0=QPI Port 0.
_PORT_SEL1=QPI Port 1.
1 RW 1 MIP_RX_ENABLE. Enables the Rx portion of the mirror port.
0 RW 1 MIP_TX_ENABLE. Enables the Tx portion of the mirror port.
Device: 0
Function: 0
Offset: E0h, F0h
Access as a Dword
Bit Type Reset
Value Description
27 RW 0 LA_LOAD_DISABLE. Disables the loading of the effective values of the
Intel® QuickPath CSRs when set.
23 RW 0 ENABLE_PRBS. Enables LFSR pattern during bitlock/training.
22 RW 0 ENABLE_SCRAMBLE. Enables data scrambling through LFSR.
14 RW 1 DETERMINISM_MODE. Sets determinism mode of operation.
13 RW 1 DISABLE_AUTO_COMP. Disables automatic entry into compliance.
12 RW 0 INIT_FREEZE. When set, freezes the FSM when initialization aborts.
10:8 RW 0 INIT_MODE. Initialization mode that determines altered initialization
modes.
7 RW 0 LINK_SPEED. Identifies slow speed or at-speed operation for the Intel QPI
port.
5 RW 1 PHYINITBEGIN. Instructs the port to start initialization.
4 RW 0 SINGLE_STEP. Enables single step mode.
3 RW 0 LAT_FIX_CTL. If set, instructs the remote agent to fix the latency.
2 RW 0 BYPASS_CALIBRATION. Indicates the physical layer to bypass calibration.
Register Description
56 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.6.12 MIP_PH_PRT_L0
MIP_PH_PRT_L1
Mirror Port periodic retraining timing register.
.
2.7 SAD - System Address Decoder Registers
2.7.1 SAD_PAM0123
Register for legacy dev0func0 90h-93h address space.
1 RW 0 RESET_MODIFIER. Modifies soft reset to default reset when set.
0 RW1S 0 PHY_RESET. Physical Layer Reset. Note while this register is locked after
going to FAST speed L0, this bit is not locked.
Device: 0
Function: 0
Offset: E0h, F0h
Access as a Dword
Bit Type Reset
Value Description
Device: 0
Function: 0
Offset: E4h, F4h
Access as a Dword
Bit Type Reset
Value Description
21:16 RW 29 RETRAIN_PKT_CNT. Retraining packet count.
13:10 RW 11 EXP_RETRAIN_INTERVAL. Exponential count for retraining interval.
7:0 RW 3 RETRAIN_INTERVAL. Periodic retraining interval. A value of 0 indicates
retraining is disabled.
Device: 0
Function: 1
Offset: 40h
Access as a Dword
Bit Type Reset
Value Description
29:28 RW 0 PAM3_HIENABLE. 0D4000-0D7FFF Attribute (HIENABLE) This field controls
the steering of read and write cycles that address the BIOS area from 0D4000
to 0D7FFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
25:24 RW 0 PAM3_LOENABLE. 0D0000-0D3FFF Attribute (LOENABLE) This field controls
the steering of read and write cycles that address the BIOS area from 0D0000
to 0D3FFF
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 57
Register Description
21:20 RW 0 PAM2_HIENABLE. 0CC000-0CFFFF Attribute (HIENABLE) This field controls
the steering of read and write cycles that address the BIOS area from 0CC000
to 0CFFFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
17:16 RW 0 PAM2_LOENABLE. 0C8000-0CBFFF Attribute (LOENABLE) This field controls
the steering of read and write cycles that address the BIOS area from 0C8000
to 0CBFFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
13:12 RW 0 PAM1_HIENABLE. 0C4000-0C7FFF Attribute (HIENABLE) This field controls
the steering of read and write cycles that address the BIOS area from 0C4000
to 0C7FFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
9:8 RW 0 PAM1_LOENABLE. 0C0000-0C3FFF Attribute (LOENABLE) This field controls
the steering of read and write cycles that address the BIOS area from 0C0000
to 0C3FFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
5:4 RW 0 PAM0_HIENABLE. 0F0000-0FFFFF Attribute (HIENABLE) This field controls
the steering of read and write cycles that address the BIOS area from 0F0000
to 0FFFFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
Device: 0
Function: 1
Offset: 40h
Access as a Dword
Bit Type Reset
Value Description
Register Description
58 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.7.2 SAD_PAM456
Register for legacy dev0func0 94h-97h address space.
Device: 0
Function: 1
Offset: 44h
Access as a Dword
Bit Type Reset
Value Description
21:20 RW 0 PAM6_HIENABLE. 0EC000-0EFFFF Attribute (HIENABLE) This field controls
the steering of read and write cycles that address the BIOS area from
0EC000 to 0EFFFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
17:16 RW 0 PAM6_LOENABLE. 0E8000-0EBFFF Attribute (LOENABLE) This field controls
the steering of read and write cycles that address the BIOS area from
0E8000 to 0EBFFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
13:12 RW 0 PAM5_HIENABLE. 0E4000-0E7FFF Attribute (HIENABLE) This field controls
the steering of read and write cycles that address the BIOS area from
0E4000 to 0E7FFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
9:8 RW 0 PAM5_LOENABLE. 0E0000-0E3FFF Attribute (LOENABLE) This field controls
the steering of read and write cycles that address the BIOS area from
0E0000 to 0E3FFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
5:4 RW 0 PAM4_HIENABLE. 0DC000-0DFFFF Attribute (HIENABLE) This field controls
the steering of read and write cycles that address the BIOS area from
0DC000 to 0DFFFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
1:0 RW 0 PAM4_LOENABLE. 0D8000-0DBFFF Attribute (LOENABLE) This field
controls the steering of read and write cycles that address the BIOS area
from 0D8000 to 0DBFFF.
00: DRAM Disabled: All accesses are directed to ESI.
01: Read Only: All reads are sent to DRAM. All writes are forwarded to ESI.
10: Write Only: All writes are send to DRAM. Reads are serviced by ESI.
11: Normal DRAM Operation: All reads and writes are serviced by DRAM.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 59
Register Description
2.7.3 SAD_HEN
Register for legacy Hole Enable.
2.7.4 SAD_SMRAM
Register for legacy 9Dh address space. Note both IOH and non-core have this now.
Device: 0
Function: 1
Offset: 48h
Access as a Dword
Bit Type Reset
Value Description
7 RW 0 HEN. This field enables a memory hole in DRAM space. The DRAM that lies
"behind" this space is not remapped.
0: No Memory hole.
1: Memory hole from 15 MB to 16MB.
Device: 0
Function: 1
Offset: 4Ch
Access as a Dword
Bit Type Reset
Value Description
14 RW 0 SMM Space Open (D_OPEN). When D_OPEN=1 and D_LCK=0, the SMM
space DRAM is made visible even when SMM decode is not active. This is
intended to help BIOS initialize SMM space. Software should ensure that
D_OPEN=1 and D_CLS=1 are not set at the same time.
13 RW 0 SMM Space Closed (D_CLS). When D_CLS = 1 SMM space DRAM is not
accessible to data references, even if SMM decode is active. Code references
may still access SMM space DRAM. This will allow SMM software to reference
through SMM space to update the display even when SMM is mapped over
the VGA range. Software should ensure that D_OPEN=1 and D_CLS=1 are
not set at the same time.
12 RW1S 0 SMM Space Locked (D_LCK). When D_LCK is set to 1 then D_OPEN is
reset to 0 and D_LCK, D_OPEN, C_BASE_SEG, G_SMRAME, PCIEXBAR,
(DRAM_RULEs and INTERLEAVE_LISTs) become read only. D_LCK can be set
to 1 via a normal configuration space write but can only be cleared by a
Reset. The combination of D_LCK and D_OPEN provide convenience with
security. The BIOS can use the D_OPEN function to initialize SMM space and
then use D_LCK to "lock down" SMM space in the future so that no
application software (or BIOS itself) can violate the integrity of SMM space,
even if the program has knowledge of the D_OPEN function. Note that TAD
does not implement this lock.
11 RW 0 Global SMRAM Enable (G_SMRAME). If set to a 1, then Compatible
SMRAM functions are enabled, providing 128 KB of DRAM accessible at the
A0000h address while in SMM (ADSB with SMM decode). To enable Extended
SMRAM function this bit has to be set to 1. Once D_LCK is set, this bit
becomes read only.
10:8 RO - Compatible SMM Space Base Segment (C_BASE_SEG). This field
indicates the location of SMM space. SMM DRAM is not remapped. It is simply
made visible if the conditions are right to access SMM space, otherwise the
access is forwarded to HI. Only SMM space between A0000 and BFFFF is
supported so this field is hardwired to 010.
Register Description
60 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.7.5 SAD_PCIEXBAR
Global register for PCIEXBAR address space.
2.7.6 SAD_DRAM_RULE_0
SAD_DRAM_RULE_1
SAD_DRAM_RULE_2
SAD_DRAM_RULE_3
SAD_DRAM_RULE_4
SAD_DRAM_RULE_5
SAD_DRAM_RULE_6
SAD_DRAM_RULE_7
SAD DRAM rules. Address Map for package determination.
Device: 0
Function: 1
Offset: 50h
Access as a Qword
Bit Type Reset
Value Description
39:20 RW 0 ADDRESS. Base address of PCIEXBAR. Must be naturally aligned to size; low
order bits are ignored.
3:1 RW 0 SIZE. Size of the PCIEXBAR address space. (MAX bus number).
000: 256MB.
001: Reserved.
010: Reserved.
011: Reserved.
100: Reserved.
101: Reserved.
110: 64MB.
111: 128MB.
0 RW 0 ENABLE. Enable for PCIEXBAR address space. Editing size should not be done
without also enabling range.
Device: 0
Function: 1
Offset: 80h, 84h, 88h, 8Ch, 90h, 94h, 98h, 9Ch
Access as a Dword
Bit Type Reset
Value Description
19:6 RW - LIMIT. DRAM rule top limit address. Must be strictly greater than previous rule,
even if this rule is disabled, unless this rule and all following rules are disabled.
Lower limit is the previous rule (or 0 if it is first rule). This field is compared
against MA[39:26] in the memory address map.
2:1 RW - MODE. DRAM rule interleave mode. If a DRAM_RULE hits a 3 bit number is
used to index into the corresponding interleave_list to determine which
package the DRAM belongs to. This mode selects how that number is
computed.
00: Address bits {8,7,6}.
01: Address bits {8,7,6} XORed with {18,17,16}.
10: Address bit {6}, MOD3(Address[39..6]). (Note 6 is the high order bit)
11: Reserved.
0 RW 0 ENABLE. Enable for DRAM rule. If Enabled Range between this rule and
previous rule is Directed to HOME channel (unless overridden by other
dedicated address range registers). If disabled, all accesses in this range are
directed in MMIO to the IOH.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 61
Register Description
2.7.7 SAD_INTERLEAVE_LIST_0
SAD_INTERLEAVE_LIST_1
SAD_INTERLEAVE_LIST_2
SAD_INTERLEAVE_LIST_3
SAD_INTERLEAVE_LIST_4
SAD_INTERLEAVE_LIST_5
SAD_INTERLEAVE_LIST_6
SAD_INTERLEAVE_LIST_7
SAD DRAM package assignments. When the corresponding DRAM_RULE hits, a 3-bit
number (determined by mode) is used to index into the interleave_list to determine
which package is the HOME for this address.
00: IOH
01: Socket 0
10: Socket 1
11: Reserved
2.8 Intel QPI Link Registers
2.8.1 QPI_QPILCP_L0
QPI_QPILCP_L1
Intel QPI Link Capability. Function 4 in the below table applies only to processors with
two Intel QPI links.
;
Device: 0
Function: 1
Offset: C0h, C4h, C8h, CCh, D0h, D4h, D8h, DCh
Access as a Dword
Bit Type Reset
Value Description
29:28 RW - PACKAGE7. Package for index value 7 of interleaves.
25:24 RW - PACKAGE6. Package for index value 6 of interleaves.
21:20 RW - PACKAGE5. Package for index value 5 of interleaves.
17:16 RW - PACKAGE4. Package for index value 4 of interleaves.
13:12 RW - PACKAGE3. Package for index value 3 of interleaves.
9:8 RW - PACKAGE2. Package for index value 2 of interleaves.
5:4 RW - PACKAGE1. Package for index value 1 of interleaves.
1:0 RW - PACKAGE0. Package for index value 0 of interleaves.
Device: 2
Function: 0, 4
Offset: 40h
Access as a Dword
Bit Type Reset
Value Description
27:26 RO - VN0_CRDTS_DATA. VN0 Credits per Data MC
00 - 0 credits
01 - 1
10 - 2 to 8
11 - RSVD
Register Description
62 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.8.2 QPI_QPILCL_L0
QPI_QPILCL_L1
Intel QPI Link Control.
23:22 RO - VN0_CRDTS_NDATA. VN0 Credits per Non-Data MC
00 - 0 credits
01 - 1
10 - 2 to 8
11 - RSVD
21:16 RO - VNA_CRDTS. VNA Credits / 8, after rounding down.
11 RO - CRC_SUPPORT. CRC Mode Support.
0 - 8b CRC.
1 - RSVD
9:8 RO - FLIT_INTERLEAVE. Flit Interleave.
00 - Idle/Null flit only.
01 - Command Insert Interleave.
10 - RSVD.
11 - RSVD.
7:0 RO - QPI_VER. Intel QPI Version Number
0 - Rev 1.0
!0 - RSVD.
Device: 2
Function: 0, 4
Offset: 40h
Access as a Dword
Bit Type Reset
Value Description
Device: 2
Function: 0, 4
Offset: 48h
Access as a Dword
Bit Type Reset
Value Description
21 RW 0 L1_MASTER. Indicates that this end of the link is the L1 master. This link
transmitter bit is an L1 power state master and can initiate an L1 power state
transition. If this bit is not set, then the link transmitter is an L1 power state
slave and should respond to L1 transitions with an ACK or NACK.
If the link power state of L1 is enabled, then there is one master and one slave
per link. The master may only issue single L1 requests, while the slave can only
issue single L1_Ack or L1_NAck responses for the corresponding request.
20 RW 0 L1_ENABLE. Enables L1 mode at the transmitter. This bit should be ANDed
with the receive L1 capability bit received during parameter exchange to
determine if a transmitter is allowed to enter into L1. This is NOT a bit that
determines the capability of a device.
18 RW 0 L0S_ENABLE. Enables L0s mode at the transmitter. This bit should be ANDed
with the receive L0s capability bit received during parameter exchange to
determine if a transmitter is allowed to enter into L0s. This is NOT a bit that
determines the capability of a device.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 63
Register Description
2.8.3 QPI_QPILS_L0
QPI_QPILS_L1
Intel QPI Link Status.
2.8.4 QPI_DEF_RMT_VN_CREDITS_L0
QPI_DEF_RMT_VN_CREDITS_L1
This is the control register that houses the default values of available remote credits to
be transmitted to the remote agent for the remote Tx use.
2.8.5 QPI_RMT_QPILP0_STAT_L0
QPI_RMT_QPILP0_STAT_L1
Remote's QPI Parameter 0 Value register.
Device: 2
Function: 0, 4
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
31 RO - CHIPSET_LINK. Indicates that the local physical link is connected to the
IOH.
Device: 2
Function: 0, 4
Offset: 58h
Access as a Dword
Bit Type Reset
Value Description
18:12 RW 100 VNA. VNA Credits.
11:10 RW 1 NCS. NCS Channel VN0 Credits.
9:8 RW 1 NCB. NCB Channel VN0 Credits.
7:6 RW 1 DRS. DRS Channel VN0 Credits.
5:4 RW 1 NDR. NDRChannel VN0 Credits.
3:2 RW 1 SNP. SNP Channel VN0 Credits.
1:0 RW 1 HOM. HOMChannel VN0 Credits.
Device: 2
Function: 0, 4
Offset: C0h
Access as a Dword
Bit Type Reset
Value Description
23:16 RO - LLR_WRAP_VALUE. Value after which the LLR sequence counter wraps.
14:8 RO - NodeID_OFFSET. Node ID offset for the sending agent.
7:5 RO - NodeID. Number of Node IDs of the transmitting agent.
4:0 RO - PORT_NUMBER. Sender's port number.
Register Description
64 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.8.6 QPI_RMT_QPILP1_STAT_L0
QPI_RMT_QPILP1_STAT_L1
Remote's QPI Parameter 1 Value register.
2.8.7 QPI_RMT_QPILP2_STAT_L0
QPI_RMT_QPILP2_STAT_L1
Remote's QPI Parameter 2 Value register.
Device: 2
Function: 0, 4
Offset: C4h
Access as a Dword
Bit Type Reset
Value Description
9 RO - L1_SUPPORT. Indicates the remote agent's ability to support L1 state.
8 RO - L0P_SUPPORT. Indicates the remote agent's ability to support L0P state.
7 RO - L0S_SUPPORT. Indicates the remote agent's ability to support L0S state.
6 RO - RX_CII_SUPPORT. Indicates the remote agent's ability to receive CII data.
5 RO - PREFERRED_TX_SDI_MODE. Indicates the ability of the remote agent
transmitter to send scheduled data interleave data.
4 RO - RCV_SDI_SUPPORT. Indicates remote agent can receive scheduled data
interleave data.
3:2 RO - PREFERRED_TX_CRC_MODE. Preferred send mode for the remote
transmitter.
00: No CRC
01: 8b CRC
10: 16b rolling CRC
11: RSVD
1:0 RO - RCV_CRC_MODE_SUPPORTED. CRC modes that the remote agent
supports.
00: RSVD
01: 8b CRC
10: 16b and 8b CRC
11: RSVD
Device: 2
Function: 0, 4
Offset: C8h
Access as a Dword
Bit Type Reset
Value Description
31 RO - Agent_000_Caching. Indicates agent 000 is a caching agent.
30 RO - Agent_000_Home. Indicates agent 000 is a home agent.
29 RO - Agent_000_IO_Proxy. Indicates agent 000 is an IO Proxy agent.
28 RO - RSVD.
26 RO - Agent_000_Router. Indicates agent 000 is a router agent.
25 RO - Agent_000_Firmware. Indicates agent 000 is a firmware agent.
24 RO - Agent_000_Config. Indicates agent 000 is a configuration agent.
23 RO - Agent_001_Caching. Indicates agent 001 is a caching agent.
22 RO - Agent_001_Home. Indicates agent 001 is a home agent.
21 RO - Agent_001_IO_Proxy. Indicates agent 001 is an IO Proxy agent.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 65
Register Description
2.8.8 QPI_RMT_QPILP3_STAT_L0
QPI_RMT_QPILP3_STAT_L1
Remote's QPI Parameter 3 Value register.
20 RO - RSVD.
18 RO - Agent_001_Router. Indicates agent 001 is a router agent.
17 RO - Agent_001_Firmware. Indicates agent 001 is a firmware agent.
16 RO - Agent_001_Config. Indicates agent 001 is a configuration agent.
15 RO - Agent_010_Caching. Indicates agent 010 is a caching agent.
14 RO - Agent_010_Home. Indicates agent 010 is a home agent.
13 RO - Agent_010_IO_Proxy. Indicates agent 010 is an IO Proxy agent.
12 RO - RSVD.
10 RO - Agent_010_Router. Indicates agent 010 is a router agent.
9 RO - Agent_010_Firmware. Indicates agent 010 is a firmware agent
8 RO - Agent_010_Config. Indicates agent 010 is a configuration agent.
7 RO - Agent_011_Caching. Indicates agent 011 is a caching agent.
6 RO - Agent_011_Home. Indicates agent 011 is a home agent.
5 RO - Agent_011_IO_Proxy. Indicates agent 011 is an IO Proxy agent.
4 RO - RSVD.
2 RO - Agent_011_Router. Indicates agent 011 is a router agent.
1 RO - Agent_011_Firmware. Indicates agent 011 is a firmware agent.
0 RO - Agent_011_Config. Indicates agent 011 is a configuration agent.
Device: 2
Function: 0, 4
Offset: C8h
Access as a Dword
Bit Type Reset
Value Description
Device: 2
Function: 0, 4
Offset: CCh
Access as a Dword
Bit Type Reset
Value Description
31 RO - Agent_100_Caching. Indicates agent 100 is a caching agent.
30 RO - Agent_100_Home. Indicates agent 100 is a home agent.
29 RO - Agent_100_IO_Proxy. Indicates agent 100 is an IO Proxy agent.
28 RO - RSVD.
26 RO - Agent_100_Router. Indicates agent 100 is a router agent.
25 RO - Agent_100_Firmware. Indicates agent 100 is a firmware agent.
24 RO - Agent_100_Config. Indicates agent 100 is a configuration agent.
23 RO - Agent_101_Caching. Indicates agent 101 is a caching agent.
22 RO - Agent_101_Home. Indicates agent 101 is a home agent.
21 RO - Agent_101_IO_Proxy. Indicates agent 101 is an IO Proxy agent.
20 RO - RSVD.
Register Description
66 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.9 Intel QPI Physical Layer Registers
2.9.1 QPI_0_PH_CPR
QPI_1_PH_CPR
Intel QPI Physical Layer Capability Register.
18 RO - Agent_101_Router. Indicates agent 101 is a router agent.
17 RO - Agent_101_Firmware. Indicates agent 101 is a firmware agent.
16 RO - Agent_101_Config. Indicates agent 101 is a configuration agent.
15 RO - Agent_110_Caching. Indicates agent 110 is a caching agent.
14 RO - Agent_110_Home. Indicates agent 110 is a home agent.
13 RO - Agent_110_IO_Proxy. Indicates agent 110 is an IO Proxy agent.
12 RO - RSVD.
10 RO - Agent_110_Router. Indicates agent 110 is a router agent.
9 RO - Agent_110_Firmware. Indicates agent 110 is a firmware agent
8 RO - Agent_110_Config. Indicates agent 110 is a configuration agent.
7 RO - Agent_111_Caching. Indicates agent 111 is a caching agent.
6 RO - Agent_111_Home. Indicates agent 111 is a home agent.
5 RO - Agent_111_IO_Proxy. Indicates agent 111 is an IO Proxy agent.
4 RO - RSVD.
2 RO - Agent_111_Router. Indicates agent 111 is a router agent.
1 RO - Agent_111_Firmware. Indicates agent 111 is a firmware agent.
0 RO - Agent_111_Config. Indicates agent 111 is a configuration agent.
Device: 2
Function: 0, 4
Offset: CCh
Access as a Dword
Bit Type Reset
Value Description
Device: 2
Function: 1, 5
Offset: 68h
Access as a Dword
Bit Type Reset
Value Description
29 RO - LFSR_POLYNOMIAL. Agent's ITU polynomial capability for loopback.
28:24 RO - NUMBER_OF_TX_LANES. Number of Tx lanes with which an implementation
can operate for full width.
Bit 28 - If set, 20 lanes.
The bit indicating the maximum lanes will determine the number of
control/status bits implemented in Tx/Rx Data lane Control/Status Registers.
23 RO - PRBS_CAPABILITY. If set, implementation is capable of using specified
pattern in bitlock/retraining.
22 RO - SCRAMBLE_CAPABILITY. If set, implementation is capable of data
scrambling/descrambling with LFSR.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 67
Register Description
2.9.2 QPI_0_PH_CTR
QPI_1_PH_CTR
Intel QPI Physical Layer Control Register.
21:20 RO - RAS_CAPABILITY. Any of these bits set indicates Alternate Clock RAS
capability available and that corresponding control bits in QPI_*_PH_CTR are
implemented.
17:16 RO - DETERMINISM_SUPPORT. Determinism supported mode of operations.
Bit17: If set, Master mode of operation supported. Component Specification or
equivalent document should contain the information about PhyL0Synch.
Bit16: If set, Slave mode of operation supported.
10:8 RO - LINK_WIDTH_CAPABILITY. Bit8: If set, Full Width capable.
7:5 RO 0 DEBUG_CAPABILITY. Bit7: If set, an implementation is not capable of
extracting slave electrical parameter from TS.Loopback and apply during the
test.
Bit6: If set, an implementation is not capable of running in Compliance slave
mode as well as transitioning to Loopback.Pattern from Compliance state.
Bit5: If set, an implementation is not capable of doing Loopcount Stal
4 RO 0 RETRAIN_GRANULARITY. If set, implementation is capable of 16UI
granularity in retraining duration.
3:0 RO - PHY_VERSION. This is the Intel QPI Phy version.
0: Current Intel QPI version 0.
Rest are reserved.
Device: 2
Function: 1, 5
Offset: 68h
Access as a Dword
Bit Type Reset
Value Description
Device: 2
Function: 1, 5
Offset: 6Ch
Access as a Dword
Bit Type Reset
Value Description
27 RW 0 LA_LOAD_DISABLE. Disables the loading of the effective values of the Intel
QPI CSRs when set.
23 RW 0 ENABLE_PRBS. Enables LFSR pattern during bitlock/training.
1 - use pattern in bitlock/retraining.
0 - use clock pattern for bitlock/retraining.
22 RW 0 ENABLE_SCRAMBLE. Enables data scrambling through LFSR.
1 - data scrambled/descrambled with LFSR
0 - data not scrambled/descrambled.
15:14 RW 2 DETERMINISM_MODE. Sets determinism mode of operation.
00 - Non-deterministic initialization.
01 - Slave mode initialization.
10 - Master mode of initialization - valid only if a component can generate its
PhyL0Synch.
13 RW 1 DISABLE_AUTO_COMP. Disables automatic entry into compliance.
0 - path from detect.clkterm to compliance is allowed.
1 - path from detect.clkterm to compliance is disabled.
12 RW 0 INIT_FREEZE. When set, freezes the FSM when initialization aborts.
Register Description
68 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.9.3 QPI_0_PH_PIS
QPI_1_PH_PIS
Intel QPI Physical Layer Initialization Status Register.
11 RW 0 DISABLE_ISI_CHECK. Defeature mode to disable ISI checking during
Polling.LaneDeskew state.
10:8 RW 0 INIT_MODE. Initialization mode that determines altered initialization modes.
7 RW 0 LINK_SPEED. Identifies slow speed or at-speed operation for the Intel QPI
port.
1 - Force direct operational speed initialization.
0 - Slow speed initialization.
5 RW 1 PHYINITBEGIN. Instructs the port to start initialization.
4 RW 0 SINGLE_STEP. Enables single step mode.
3 RW 0 LAT_FIX_CTL. If set, instructs the remote agent to fix the latency.
2 RW 0 BYPASS_CALIBRATION. Indicates the physical layer to bypass calibration.
1 RW 0 RESET_MODIFIER. Modifies soft reset to default reset when set.
0 RW1S 0 PHY_RESET. Physical Layer Reset.
Device: 2
Function: 1, 5
Offset: 6Ch
Access as a Dword
Bit Type Reset
Value Description
Device: 2
Function: 1, 5
Offset: 80h
Access as a Dword
Bit Type Reset
Value Description
29 RO - GLOBAL_ERROR. Set upon any error detected on the link during Loopback
Pattern.
28 RO - TEST_BUSY. Test busy bit indicating that a test is in progress.
27 RW1C 0 STATE_HOLD. State machine hold bit for single step and init freeze modes.
26 RO - INIT_SPEED. Current initialization speed.
1 - Operational Speed Initialization.
0 - Slow Speed Initialization.
25 RO - PORT_RMT_ACK. Port Remote ACK status.
24 RO - PORT_TX_RDY. Port Tx Ready status.
20:16 RO - RX_STATE. Current state of the local Rx.
12:8 RO - TX_STATE. Current state of the local Tx.
1 RW1C 0 CALIBRATION_DONE. Indicates that calibration has been completed for the
Intel QPI link.
0 RW1C 0 LINKUP_IDENTIFIER. Link up identifier for the Intel QPI link.
Set to 0 during Default Reset.
Set to 1 when initialization completes and link enters L0.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 69
Register Description
2.9.4 QPI_0_PH_PTV
QPI_1_PH_PTV
Intel QPI Physical Layer Initialization Primary Timeout Value Register.
2.9.5 QPI_0_PH_LDC
QPI_1_PH_LDC
Intel QPI Physical Layer Link Determinism Control Register.
Device: 2
Function: 1, 5
Offset: 94h
Access as a Dword
Bit Type Reset
Value Description
19:16 RW 0 POLLING_BITLOCK. Exponential count for Polling Bitlock. Timeout value is
2^(count in this field)*128 TSL.
11:8 RW 1 INBAND_RESET. Exponential count for Inband_Reset_Init. Time-out value is
2^(count in this field)*128 TSL.
3:0 RW 2 DEBOUNCE. Exponential count for debounce.
Device: 2
Function: 1, 5
Offset: 9Ch
Access as a Dword
Bit Type Reset
Value Description
23:16 RW 0 TARGET_LINK_LATENCY. This field specifies the target link latency value in
UI that the remote port needs to adjust to.
11:8 RW 5 DRIFT_BUF_DEPTH. The default pointer separation for the Intel QPI Rx PI
FIFO.
3:0 RW 2 DRIFT_ALARM_THRESHOLD. Intel QPI RX PI FIFO alarm threshold.
Register Description
70 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.9.6 QPI_0_PH_PRT
QPI_1_PH_PRT
Intel QPI Periodic Retraining Timing Register
2.9.7 QPI_0_PH_PMR0
QPI_1_PH_PMR0
Intel QPI Physical Layer Power Management Register.
Device: 2
Function: 1, 5
Offset: A4h
Access as a Dword
Bit Type Reset
Value Description
22 RW 0 DURATION_GRANULARITY.
1 indicates agent is using 16 UI granularity
0 indicates agent is using 64 UI granularity.
21:14 RW - RETRAIN_PKT_CNT. Retraining packet count.
13:10 RW - EXP_RETRAIN_INTERVAL. Exponential count for retraining interval. Interval
value is multiplied by 2^(count in this field). Although these values are
specified in exponential form, counting still needs to be accurate to single UI.
7:0 RW - RETRAIN_INTERVAL. Periodic retraining interval. A value of 0 indicates
periodic retraining is disabled.
Retraining must be disabled in Slow Mode.
Value to be programmed by firmware. Each count represents 1024 UI (16 TSL)
Device: 2
Function: 1, 5
Offset: D0h
Access as a Dword
Bit Type Reset
Value Description
27:26 RW 0 L0s_SLEEP_MIN_REM.
Remote agent's minimum L0S time.
00 -> 32 UI
01 -> 48 UI
10 -> 64 UI
11 -> 96 UI
21:16 RW 0 L0s_WAKE_REM. Remote agent's L0S wake time in effect. Value is
(field+1)*16 UI.
11:10 RW - L0s_SLEEP_MIN. Minimum time local Tx on a port initiating L0s entry should
stay in L0s.
00 -> 32 UI
01 -> 48 UI
10 -> 64 UI
11 -> 96 UI
5:0 RW - L0s_WAKE. L0s Wake-up time to be used by remote Tx.
This parameter value is derived from field value as (field + 1)*16 UI.
Field value of 0 (parameter value of 16) means L0s is not supported.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 71
Register Description
2.9.8 QPI_0_EP_SR
QPI_1_EP_SR
Intel QPI Physical Layer Electrical Parameter Select Register. This register enables the
equalization coefficient setting functionality of the QPI_[0,1]_EP_MCTR register when
QPI_[0,1]_EP_SR is set to 6.
2.9.9 QPI_0_EP_MCTR
QPI_1_EP_MCTR
Intel QPI Electrical Parameter Miscellaneous Control Register. This register holds
equalization coefficient parameters.
Device: 2
Function: 1, 5
Offset: E0h
Access as a Dword
Bit Type Reset
Value Description
23:16 RW 0 EPARAM_SEL. Select electrical parameter. Set to 6 to enable equalization
coefficient setting functionality of QPI_[0,1]_EP_MCTR register.
Device: 2
Function: 1, 5
Offset: F4h
Access as a Dword
Bit Type Reset
Value Description
31:8 RW 0 MISC_EPARAM_CTL. Miscellaneous electrical-parameter specific control.
7:3 RW 12 TX_EQUALIZATION. Sets the equalization coefficient of the QPI transmitter
based on value obtained from SISTAI simulations.
2 RW 1 EN. Enables or disables custom TEQ setting.
1 - Enable
0 - Disable
1:0 RW 0 RSVD.
Register Description
72 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.10 Intel QPI Miscellaneous Registers
2.10.1 QPI_0_PLL_STATUS
QPI_1_PLL_STATUS
This register provides the current and available operating conditions for the Intel QPI
PLLs.
2.10.2 QPI_0_PLL_RATIO
QPI_1_PLL_RATIO
This register holds the next PLL multiplier. The write to one link will affect the mirror
port as well as both Intel QPI links. The reads are link specific.
Device: 2
Function: 1, 5
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
30:24 RO - MAX_CCLK_RATIO. Maximum CCLK (The Intel® QuickPath Interconnect
Forwarded Clock for at speed operation) supported on this part (Value *
133Mhz).
22:16 RO - MIN_CCLK_RATIO. Minimum CCLK (The Intel® QuickPath Interconnect
Forwarded Clock for at speed operation) supported on this part (Value *
133Mhz).
14:8 RO - CCLK_RATIO_MASK. Mask that will be applied to the
QPI_[0,1]_PLL_RATIO.NEXT_PLL_RATIO field on reset to obtain the current
ratio (I.E. mask of 1 will force only even ratios; mask of 3 forces every 4th
ratio).
6:0 RO - CURRENT_CCLK_RATIO. The current CCLK (The Intel® QuickPath
Interconnect Forwarded Clock for at speed operation) (Value * 133Mhz).
Device: 2
Function: 1, 5
Offset: 54h
Access as a Dword
Bit Type Reset
Value Description
6:0 RW 12 NEXT_PLL_RATIO. The next Intel QPI PLL ratio to be adopted.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 73
Register Description
2.11 Integrated Memory Controller Control Registers
The registers in section 2.11 apply only to processors supporting registered DIMMs.
2.11.1 MC_CONTROL
Primary control register.
Device: 3
Function: 0
Offset: 48h
Access as a Dword
Bit Type Reset
Value Description
10 RW 0 CHANNEL2_ACTIVE. When set, indicates MC channel 2 is active. This bit is
controlled (set/reset) by software only. This bit is required to be set for any
active channel when INIT_DONE is set by software.
9 RW 0 CHANNEL1_ACTIVE. When set, indicates MC channel 1 is active. This bit is
controlled (set/reset) by software only. This bit is required to be set for any
active channel when INIT_DONE is set by software. Channel 0 AND Channel
1 active must both be set for a lockstep or mirrored pair.
8 RW 0 CHANNEL0_ACTIVE. When set, indicate MC channel 0 is active. This bit is
controlled (set/reset) by software only. This bit is required to be set for any
active channel when INIT_DONE is set by software. Channel 0 AND Channel
1 active must both be set for a lockstep or mirrored pair.
7 WO 0 INIT_DONE. MC initialize complete signal. Setting this bit will exit the
training mode of the Integrated Memory Controller and begin normal
operation including all enabled maintenance operations. Any
CHANNNEL_ACTIVE bits not set when writing a 1 to INIT_DONE will cause
the corresponding channel to be disabled.
6 RW 0 DIVBY3EN. Divide By 3 enable. When set, MAD would use the longer
pipeline for transactions that are 3 or 6 way interleaved and shorter pipeline
for all other transactions. The SAG registers must be appropriately
programmed as well.
5 RW 0 CHANNELRESET2. Reset only the state within the channel. Equivalent to
pulling warm reset for that channel.
4 RW 0 CHANNELRESET1. Reset only the state within the channel. Equivalent to
pulling warm reset for that channel.
3 RW 0 CHANNELRESET0. Reset only the state within the channel. Equivalent to
pulling warm reset for that channel.
2 RW 0 AUTOPRECHARGE. Autoprecharge enable. This bit should be set with the
closed page bit. If it is not set with closed page, address decode will be done
without setting the autoprecharge bit.
1 RW 0 ECCEN. ECC Checking enables. When this bit is set in lockstep mode the ECC
checking is for the x8 SDDC. ECCEN without Lockstep enables the x4 SDDC
ECC checking.
0 RW 0 CLOSED_PAGE. When set, the MC supports a Closed Page policy. The
default is Open Page but BIOS should always configure this bit.
Register Description
74 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.11.2 MC_STATUS
MC Primary Status register.
2.11.3 MC_SMI_DIMM_ERROR_STATUS
SMI DIMM error threshold overflow status register. This bit is set when the per-DIMM
error counter exceeds the specified threshold. The bit is reset by BIOS.
Device: 3
Function: 0
Offset: 4Ch
Access as a Dword
Bit Type Reset
Value Description
4 RO 1 ECC_ENABLED. ECC is enabled.
2 RO 0 CHANNEL2_DISABLED. Channel 2 is disabled. This can be factory configured
or if Init done is written without the channel_active being set. Clocks in the
channel will be disabled when this bit is set.
1 RO 0 CHANNEL1_DISABLED. Channel 1 is disabled. This can be factory configured
or if Init done is written without the channel_active being set. Clocks in the
channel will be disabled when this bit is set.
0 RO 0 CHANNEL0_DISABLED. Channel 0 is disabled. This can be factory configured
or if Init done is written without the channel_active being set. Clocks in the
channel will be disabled when this bit is set.
Device: 3
Function: 0
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
13:12 RW0C 0 REDUNDANCY_LOSS_FAILING_DIMM. The ID for the failing DIMM when
redundancy is lost.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 75
Register Description
2.11.4 MC_SMI_CNTRL
System Management Interrupt control register.
11:0 RW0C 0 DIMM_ERROR_OVERFLOW_STATUS. This 12-bit field is the per dimm error
overflow status bits. The organization is as follows:
If there are three or more DIMMS on the channel:
Bit 0 : Dimm 0 Channel 0
Bit 1 : Dimm 1 Channel 0
Bit 2 : Dimm 2 Channel 0
Bit 3 : Dimm 3 Channel 0
Bit 4 : Dimm 0 Channel 1
Bit 5 : Dimm 1 Channel 1
Bit 6 : Dimm 2 Channel 1
Bit 7 : Dimm 3 Channel 1
Bit 8 : Dimm 0 Channel 2
Bit 9 : Dimm 1 Channel 2
Bit 10 : Dimm 2 Channel 2
Bit 11 : Dimm 3 Channel 2
If there are one or two DIMMS on the channel:
Bit 0 : Dimm 0, Ranks 0 and 1, Channel 0
Bit 1 : Dimm 0, Ranks 2 and 3, Channel 0
Bit 2 : Dimm 1, Ranks 0 and 1, Channel 0
Bit 3 : Dimm 1, Ranks 2 and 3, Channel 0
Bit 4 : Dimm 0, Ranks 0 and 1, Channel 1
Bit 5 : Dimm 0, Ranks 2 and 3, Channel 1
Bit 6 : Dimm 1, Ranks 0 and 1, Channel 1
Bit 7 : Dimm 1, Ranks 2 and 3, Channel 1
Bit 8 : Dimm 0, Ranks 0 and 1, Channel 2
Bit 9 : Dimm 0, Ranks 2 and 3, Channel 2
Bit 10 : Dimm 1, Ranks 0 and 1, Channel 2
Bit 11 : Dimm 1, Ranks 2 and 3, Channel 2
Device: 3
Function: 0
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
Device: 3
Function: 0
Offset: 54h
Access as a Dword
Bit Type Reset
Value Description
16 RW 0 INTERRUPT_SELECT_NMI. NMI enable. Set to enable NMI signaling. Clear to
disable NMI signaling. If both NMI and SMI enable bits are set, then only SMI is
sent.
15 RW 0 INTERRUPT_SELECT_SMI. SMI enable. Set to enable SMI signaling. Clear to
disable SMI signaling. If both NMI and SMI enable bits are set, then only SMI is
sent. This bit functions the same way in Mirror and Independent Modes.
The possible SMI events enabled by this bit are:
Any one of the error counters MC_COR_ECC_CNT_X meets the value of
SMI_ERROR_THRESHOLD field of this register.
MC_RAS_STATUS.REDUNDANCY_LOSS bit is set to 1.
14:0 RW 0 SMI_ERROR_THRESHOLD. Defines the error threshold to compare against
the per-DIMM error counters MC_COR_ECC_CNT_X, which are also 15 bits.
Register Description
76 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.11.5 MC_RESET_CONTROL
DIMM Reset enabling controls.
2.11.6 MC_CHANNEL_MAPPER
Channel mapping register. The sequence of operations to update this register is:
Read MC_Channel_Mapper register
Compare data read to data to be written. If different then write.
Poll MC_Channel_Mapper register until the data read matches data written.
Device: 3
Function: 0
Offset: 5Ch
Access as a Dword
Bit Type Reset
Value Description
0 WO 0 BIOS_RESET_ENABLE. When set, MC takes over control of driving RESET to
the DIMMs. This bit is set on S3 exit and cold boot to take over RESET driving
responsibility from the physical layer.
Device: 3
Function: 0
Offset: 60h
Access as a Dword
Bit Type Reset
Value Description
17:15 RW 0 RDLCH2. Mapping of Logical Channel 2 to physical channel for Reads.
001 - Maps to physical Channel 0
010 - Maps to physical Channel 1
100 - Maps to physical Channel 2
14:12 RW 0 WRLCH2. Mapping of Logical Channel 2 to physical channel for Writes.
001 - Maps to physical Channel 0
010 - Maps to physical Channel 1
100 - Maps to physical Channel 2
11:9 RW 0 RDLCH1. Mapping of Logical Channel 1 to physical channel for Reads.
001 - Maps to physical Channel 0
010 - Maps to physical Channel 1
100 - Maps to physical Channel 2
8:6 RW 0 WRLCH1. Mapping of Logical Channel 1 to physical channel for Writes.
001 - Maps to physical Channel 0
010 - Maps to physical Channel 1
100 - Maps to physical Channel 2
5:3 RW 0 RDLCH0. Mapping of Logical Channel 0 to physical channel for Read.
001 - Maps to physical Channel 0
010 - Maps to physical Channel 1
100 - Maps to physical Channel 2
2:0 RW 0 WRLCH0. Mapping of Logical Channel 0 to physical channel for Writes.
001 - Maps to physical Channel 0
010 - Maps to physical Channel 1
100 - Maps to physical Channel 2
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 77
Register Description
2.11.7 MC_MAX_DOD
Defines the MAX number of DIMMS, RANKS, BANKS, ROWS, COLS among all DIMMS
populating the three channels. The Memory Init logic uses this register to cycle through
all the memory addresses writing all 0's to initialize all locations. This register is also
used for scrubbing and must always be programmed if any DODs are programmed.
2.11.8 MC_RD_CRDT_INIT
These registers contain the initial read credits available for issuing memory reads. TAD
read credit counters are loaded with the corresponding values at reset and anytime this
register is written. BIOS must initialize this register with appropriate values depending
on the level of Isoch support in the platform. It is illegal to write this register while TAD
is active (has memory requests outstanding), as the write will break TAD's outstanding
credit count values.
Register programming rules:
• Total read credits (CRDT_RD + CRDT_RD_HIGH + CRDT_RD_CRIT) must not
exceed 31.
• CRDT_RD_HIGH value must correspond to the number of high RTIDs reserved at
the IOH.
• CRDT_RD_CRIT value must correspond to the number of critical RTIDs reserved at
the IOH.
Device: 3
Function: 0
Offset: 64h
Access as a Dword
Bit Type Reset
Value Description
10:9 RW 0 MAXNUMCOL. Maximum Number of Columns.
00: 2^10 columns
01: 2^11 columns
10: 2^12 columns
11: RSVD.
8:6 RW 0 MAXNUMROW. Maximum Number of Rows.
000: 2^12 Rows
001: 2^13 Rows
010: 2^14 Rows
011: 2^15 Rows
100: 2^16 Rows
Others: RSVD.
5:4 RW 0 MAXNUMBANK. Max Number of Banks.
00: Four-banked
01: Eight-banked
10: Sixteen-banked.
3:2 RW 0 MAXNUMRANK. Maximum Number of Ranks.
00: Single Ranked
01: Double Ranked
10: Quad Ranked.
1:0 RW 0 MAXNUMDIMMS. Maximum Number of Dimms.
00: 1 Dimm
01: 2 Dimms
10: 3 Dimms
11: RSVD.
Register Description
78 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
• CRDT_RD_HIGH + CRDT_RD must be less than or equal to 13 if High or Critical
credits are nonzero.
• CRDT_RD_HIGH + CRDT_RD_CRIT must be less than or equal to 8.
• CRDT_RD_CRIT must be less than or equal to 6. Set CRDT_RD to (16 -
CRDT_RD_CRIT - CRDT_RD_HIGH).
• If (Mirroring enabled) then Max for CRDT_RD is 14, otherwise it is 15.
• If (Isoch not enabled) then CRDT_RD_HIGH and CRDT_RD_CRIT are set to 0.
2.11.9 MC_CRDT_WR_THLD
Memory Controller Write Credit Thresholds. A Write threshold is defined as the number
of credits reserved for this priority (or higher) request. It is required that High
threshold be greater than or equal to Crit threshold, and that both be lower than the
total Write Credit init value. BIOS must initialize this register with appropriate values
depending on the level of Isoch support in the platform. The new values take effect
immediately upon being written.
Register programming rules:
• CRIT threshold value must correspond to the number of critical RTIDs reserved at
the IOH.
• HIGH threshold value must correspond to the sum of critical and high RTIDs
reserved at the IOH (which must not exceed 30).
• Set MC_Channel_*_WAQ_PARAMS.ISOCENTRYTHRESHHOLD equal to (31-CRIT).
Device: 3
Function: 0
Offset: 70h
Access as a Dword
Bit Type Reset
Value Description
20:16 RW 3 CRDT_RD_CRIT. Critical Read Credits.
12:8 RW 1 CRDT_RD_HIGH. High Read Credits.
4:0 RW 13 CRDT_RD. Normal Read Credits.
Device: 3
Function: 0
Offset: 74h
Access as a Dword
Bit Type Reset
Value Description
12:8 RW 4 HIGH. High Credit Threshold.
4:0 RW 3 CRIT. Critical Credit Threshold.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 79
Register Description
2.11.10 MC_SCRUBADDR_LO
This register contains part of the address of the last patrol scrub request issued. When
running Memtest, the failing address is logged in this register on Memtest errors.
Software can write the next address to be scrubbed into this register. Patrol scrubs
must be disabled to reliably write this register.
2.11.11 MC_SCRUBADDR_HI
This register pair contains part of the address of the last patrol scrub request issued.
When running memtest, the failing address is logged in this register on memtest
errors. Software can write the next address into this register. Scrubbing must be
disabled to reliably read and write this register.
Device: 3
Function: 0
Offset: 78h
Access as a Dword
Bit Type Reset
Value Description
29:14 RW 0 PAGE. Contains the row of the last scrub issued. Can be written to specify the
next scrub address with STARTSCRUB in the MC_SCRUB_CONTROL register.
13:0 RW 0 COLUMN. Contains the column of the last scrub issued. Can be written to
specify the next scrub address with STARTSCRUB in the MC_SCRUB_CONTROL
register.
Device: 3
Function: 0
Offset: 7Ch
Access as a Dword
Bit Type Reset
Value Description
12 RO 0 MEMBIST_INPROGRESS. When this bit is asserted by hardware
MemTest/MemInit is in progress.
11 RO 0 MEMBIST_CMPLT. When this bit is asserted by hardware MemTest/MemInit is
complete.
10 WO 0 RESET_MEMBIST_STATUS. When this bit is written to a 1, the status field
MEMBIST_CMPLT is cleared.
9:8 RW 0 CHNL. Can be written to specify the next scrub address with STARTSCRUB in
the MC_SCRUB_CONTROL register. This register is not updated with channel
address of the last scrub address issued.
7:6 RW 0 DIMM. Contains the dimm of the last scrub issued. Can be written to specify
the next scrub address with STARTSCRUB in the MC_SCRUB_CONTROL register.
5:4 RW 0 RANK. Contains the rank of the last scrub issued. Can be written to specify the
next scrub address with STARTSCRUB in the MC_SCRUB_CONTROL register.
3:0 RW 0 BANK. Contains the bank of the last scrub issued. Can be written to specify the
next scrub address with STARTSCRUB in the MC_SCRUB_CONTROL register.
Register Description
80 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.12 TAD - Target Address Decoder Registers
2.12.1 TAD_DRAM_RULE_0
TAD_DRAM_RULE_1
TAD_DRAM_RULE_2
TAD_DRAM_RULE_3
TAD_DRAM_RULE_4
TAD_DRAM_RULE_5
TAD_DRAM_RULE_6
TAD_DRAM_RULE_7
TAD DRAM rules. Address map for channel determination within a package. All
addresses sent to this HOME agent must hit a valid enabled DRAM_RULE. No error will
be generated if they do not and memory aliasing will happen.
Device: 3
Function: 1
Offset: 80h, 84h, 88h, 8Ch, 90h, 94h, 98h, 9Ch
Access as a Dword
Bit Type Reset
Value Description
19:6 RW - LIMIT. DRAM rule top limit address. Must be strictly greater than previous
rule, even if this rule is disabled, unless this rule and all following rules are
disabled. Lower limit is the previous rule (or 0 if it is the first rule).
2:1 RW - MODE. DRAM rule interleave mode. If a DRAM_RULE hits, a 3-bit number is
used to index into the corresponding interleave_list to determine which
channel the DRAM belongs to. This mode selects how that number is
computed.
00: Address bits {8,7,6}.
01: Address bits {8,7,6} XORed with {18,17,16}.
10: Address bit {6}, MOD3(Address[39..6]). (Note 6 is the high order bit)
11: reserved.
0 RW 0 ENABLE. Enable for DRAM rule.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 81
Register Description
2.12.2 TAD_INTERLEAVE_LIST_0
TAD_INTERLEAVE_LIST_1
TAD_INTERLEAVE_LIST_2
TAD_INTERLEAVE_LIST_3
TAD_INTERLEAVE_LIST_4
TAD_INTERLEAVE_LIST_5
TAD_INTERLEAVE_LIST_6
TAD_INTERLEAVE_LIST_7
TAD DRAM package assignments. When the corresponding DRAM_RULE hits, a 3-bit
number (determined by mode) is used to index into the Interleave_List Branches to
determine which channel the DRAM request belongs to.
Device: 3
Function: 1
Offset: C0h, C4h, C8h, CCh, D0h, D4h, D8h, DCh
Access as a Dword
Bit Type Reset
Value Description
29:28 RW - Logical Channel7. Index 111 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
25:24 RW - Logical Channel6. Index 110 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
21:20 RW - Logical Channel5. Index 101 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
17:16 RW - Logical Channel4. Index 100 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
13:12 RW - Logical Channel3. Index 011 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
Register Description
82 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.13 Integrated Memory Controller RAS Registers
2.13.1 MC_SSRCONTROL
Scrubbing control. This register allows the enabling of patrol scrubbing and demand
scrubbing.
9:8 RW - Logical Channel2. Index 010 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
5:4 RW - Logical Channel1. Index 001 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
1:0 RW - Logical Channel0. Index 000 of the Interleave List. Bits determined from
the matching TAD_DRAM_RULE mode.
00 – Logical channel 0
01 – Logical channel 1
10 – Logical channel 2
11 – Reserved
Device: 3
Function: 1
Offset: C0h, C4h, C8h, CCh, D0h, D4h, D8h, DCh
Access as a Dword
Bit Type Reset
Value Description
Device: 3
Function: 2
Offset: 48h
Access as a Dword
Bit Type Reset
Value Description
14:7 RW 0 SCRATCHPAD. This field is available as a scratchpad for Scrubbing operations.
6 RW 0 DEMAND_SCRUB_EN. Enable Demand Scrubs.
1:0 RW 0 SSR_MODE. Patrol scrub enable.
00: Disable Patrol Scrub
01: Enable Patrol Scrub
10: RSVD.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 83
Register Description
2.13.2 MC_SCRUB_CONTROL
Contains the Scrub control parameters and status.
2.13.3 MC_RAS_ENABLES
RAS enables register.
2.13.4 MC_RAS_STATUS
RAS status register.
Device: 3
Function: 2
Offset: 4Ch
Access as a Dword
Bit Type Reset
Value Description
26 RW 0 SCRUBISSUED. When Set, the scrub address registers contain the last scrub
address issued.
25 RW 0 ISSUEONCE. When Set, the patrol scrub engine will issue the address in the
scrub address registers only once and stop.
24 RW 0 STARTSCRUB. When Set, the Patrol scrub engine will start from the address in
the scrub address registers. Once the scrub is issued this bit is reset.
23:0 RW 0 SCRUBINTERVAL. Defines the interval in DCLKS between patrol scrub
requests. The calculation for this register to get a scrub to every line in 24
hours is:
((36400)/(memory capacity/64))/cycle time of DCLK.
For 512MB at DDR3-800:
(36400/((2^29)/64))/1.25 x 10^-9 = 3471374 = 0x34F80E.
Device: 3
Function: 2
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
1 RW 0 LOCKSTEPEN. Lockstep enable. When set, channel 0 and 1 are tied together
in lockstep. The channel mapper register must be appropriately programmed
as well.
0 RW 0 MIRROREN. Mirror mode enable. The channel mapping must be set up
before this bit will have an effect on Integrated Memory Controller operation.
This changes the error policy and alternates reads between channels.
Device: 3
Function: 2
Offset: 54h
Access as a Dword
Bit Type Reset
Value Description
0 RW 0 REDUNDANCY_LOSS. One channel of a mirrored pair had an uncorrectable
error and redundancy has been lost. This bit is set by hardware and must be
cleared by software performing a channel reset to regain mirrored status.
Register Description
84 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.13.5 MC_SSRSTATUS
Provides the status of the operation specified in MC_SSRCONTROL.SSR_Mode.
2.13.6 MC_COR_ECC_CNT_0
MC_COR_ECC_CNT_1
MC_COR_ECC_CNT_2
MC_COR_ECC_CNT_3
MC_COR_ECC_CNT_4
MC_COR_ECC_CNT_5
Per Dimm counters of correctable ECC errors. The register organization is as follows.
For example, if there are three DIMMS on the channel, MC_COR_ECC_CNT_0 contains
the error counter information for DIMM 0 and DIMM1 on Channel 0.
MC_COR_ECC_CNT_1 contains the error counter information for DIMM2 on Channel 0.
The lower 16-bit of MC_COR_ECC_CNT_0 contains the errors for DIMM0 and the upper
16-bit field contains the errors for DIMM1. The lower 16-bit of MC_COR_ECC_CNT_1
contains the errors for DIMM2. The upper 16 bits of MC_COR_ECC_CNT_1 are not
used. The same organization applies to Channel 1 and Channel 2.
MC_COR_ECC_CNT_0 : Channel 0 Dimm 0/1
MC_COR_ECC_CNT_1 : Channel 0 Dimm 2/Rsvd
MC_COR_ECC_CNT_2 : Channel 1 Dimm 0/1
MC_COR_ECC_CNT_3 : Channel 1 Dimm 2/Rsvd
MC_COR_ECC_CNT_4 : Channel 2 Dimm 0/1
MC_COR_ECC_CNT_5 : Channel 2 Dimm 2/Rsvd
If there are one or two DIMMS on the channel, the lower 16-bit field of
MC_COR_ECC_CNT_0 contains the errors for DIMM0 on Ranks 0 and 1 on Channel 0.
The upper 16-bit field contains information for DIMM0 on Ranks 2 and 3 for a quad rank
DIMM. The same organization follows for DIMM1 for MC_COR_ECC_CNT_1.
MC_COR_ECC_CNT_0 : Channel 0 Dimm 0 Ranks 0,1/2,3
MC_COR_ECC_CNT_1 : Channel 0 Dimm 1 Ranks 0,1/2,3
MC_COR_ECC_CNT_2 : Channel 1 Dimm 0 Ranks 0,1/2,3
MC_COR_ECC_CNT_3 : Channel 1 Dimm 1 Ranks 0,1/2,3
MC_COR_ECC_CNT_4 : Channel 2 Dimm 0 Ranks 0,1/2,3
MC_COR_ECC_CNT_5 : Channel 2 Dimm 1 Ranks 0,1/2,3
Device: 3
Function: 2
Offset: 60h
Access as a Dword
Bit Type Reset
Value Description
1 RO 0 INPROGRESS. Patrol Scrub operation in progress. This bit is set by hardware
once scrubbing operation has started. It is cleared once operation is complete
or fails.
0 RO 0 CMPLT. Patrol Scrub operation complete. Set by hardware once operation is
complete. Bit is cleared by hardware when a new operation is enabled.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 85
Register Description
2.14 Integrated Memory Controller Test Registers
2.14.1 MC_TEST_ERR_RCV1
Memory test error recovery and detection. This is another address to access
COR_ECC_CNT register. This is the ecc error information for DIMM 2.
2.14.2 MC_TEST_ERR_RCV0
Memory test error recovery and detection. This is another address to access
COR_ECC_CNT register. This is the ecc error information for DIMM 0 and DIMM 1.
Device: 3
Function: 2
Offset: 80h, 84h, 88h, 8Ch, 90h, 94h
Access as a Dword
Bit Type Reset
Value Description
31 RW 0 DIMM1_ERR_OVERFLOW. Correctable error overflow on DIMM 1/Rsvd.
30:16 RW 0 DIMM1_COR_ERR. Correctable error count from DIMM 1/Rsvd.
15 RW 0 DIMM0_ERR_OVERFLOW. Correctable error overflow on DIMM 0/2.
14:0 RW 0 DIMM0_COR_ERR. Correctable error count from DIMM 0/2.
Device: 3
Function: 4
Offset: 60h
Access as a Dword
Bit Type Reset
Value Description
15 RW 0 DIMM2_ERR_OVERFLOW. Correctable error overflow on DIMM 2.
14:0 RW 0 DIMM2_COR_ERR. Correctable error count from DIMM 2.
Device: 3
Function: 4
Offset: 64h
Access as a Dword
Bit Type Reset
Value Description
31 RW 0 DIMM1_ERR_OVERFLOW. Correctable error overflow on DIMM 1.
30:16 RW 0 DIMM1_COR_ERR. Correctable error count from DIMM 1.
15 RW 0 DIMM0_ERR_OVERFLOW. Correctable error overflow on DIMM 0.
14:0 RW 0 DIMM0_COR_ERR. Correctable error count from DIMM 0.
Register Description
86 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.14.3 MC_TEST_PH_CTR
Memory test Control Register
2.14.4 MC_TEST_PH_PIS
Memory test physical layer initialization status
2.14.5 MC_TEST_PAT_GCTR
Pattern Generator Control
Device: 3
Function: 4
Offset: 6Ch
Access as a Dword
Bit Type Reset
Value Description
10:8 RW 0 INIT_MODE: Initialization Mode
Idle: 000
Loopback: 001
Memtest: 110
Meminit: 111
Device: 3
Function: 4
Offset: 80h
Access as a Dword
Bit Type Reset
Value Description
29 RO - GLOBAL_ERROR: Indication that an error was detected during a memory test.
Device: 3
Function: 4
Offset: A8h
Access as a Dword
Bit Type Reset
Value Description
28:24 RW 6 EXP_LOOP_CNT: Sets the length of the test, defined as 2^(EXP_LOOP_CNT)
21 RW 0 ERROR_COUNT_STALL: Masks all detected errors until cleared
20 RW1S 0 STOP_TEST: Force exit from Loopback.Pattern
19 RW 0 DRIVE_DC_ZERO: Drive 0 on lanes with PAT_DCD asserted
13:12 RW 0 PATBUF_WD_SEL: Select word within pattern buffer to be written
10:9 RW 0 PATBUF_SEL: Select which pattern buffer will be written when
MC_TEST_PAT_BA is written
5 RW 0 IGN_REM_PARAM: Slave will ignore remote parameters transmitted in
Loopback.Marker
4 RW 0 ENABLE_LFSR2: Use scrambled output of Pattern Buffer 2
3 RW 0 ENABLE_LFSR1: Use scrambled output of Pattern Buffer 1
2 RW 1 ENABLE_AUTOINV: Inversion pattern register will rotate automatically once
per loop
1 RW 0 STOP_ON_ERROR: Exit Loopback.Pattern upon first detected error
0 RW1S 0 START_TEST: Initiate transition to Loopback.Pattern
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 87
Register Description
2.14.6 MC_TEST_PAT_BA
Memory Test Pattern Generator Buffer
2.14.7 MC_TEST_PAT_IS
Memory test pattern inversion selection register
2.14.8 MC_TEST_PAT_DCD
Memory test DC drive register
Device: 3
Function: 4
Offset: B0h
Access as a Dword
Bit Type Reset
Value Description
31:0 RW 0 DATA: 32-bit window into the indirectly-addressed pattern buffer register
space.
Device: 3
Function: 4
Offset: BCh
Access as a Dword
Bit Type Reset
Value Description
7:0 RW 1 LANE_INVERT: Per-lane selection of normal or inverted pattern
Device: 3
Function: 4
Offset: C0h
Access as a Dword
Bit Type Reset
Value Description
7:0 RW 0 LANE_DRIVE_DC: Per-lane selection of DC pattern
Register Description
88 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15 Integrated Memory Controller Channel Control
Registers
2.15.1 MC_CHANNEL_0_DIMM_RESET_CMD
MC_CHANNEL_1_DIMM_RESET_CMD
MC_CHANNEL_2_DIMM_RESET_CMD
Integrated Memory Controller DIMM reset command register. This register is used to
sequence the reset signals to the DIMMs.
2.15.2 MC_CHANNEL_0_DIMM_INIT_CMD
MC_CHANNEL_1_DIMM_INIT_CMD
MC_CHANNEL_2_DIMM_INIT_CMD
Integrated Memory Controller DIMM initialization command register. This register is
used to sequence the channel through the physical layer training required for DDR.
Device: 4, 5, 6
Function: 0
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
2 RW 0 BLOCK_CKE. When set, CKE will be forced to be deasserted.
1 RW 0 ASSERT_RESET. When set, Reset will be driven to the DIMMs.
0 WO 0 RESET. Reset the DIMMs. Setting this bit will cause the Integrated Memory
Controller DIMM Reset state machine to sequence through the reset sequence
using the parameters in MC_DIMM_INIT_PARAMS.
Device: 4, 5, 6
Function: 0
Offset: 54h
Access as a Dword
Bit Type Reset
Value Description
17 WO 0 ASSERT_CKE. When set, all CKE will be asserted. Write a 0 to this bit to stop
the init block from driving CKE. This bit has no effect once
MC_CONTROL.INIT_DONE is set. This bit must be used during INITIALIZATION
only and be cleared out before MC_CONTROL.INIT_DONE is set. This bit must
not be asserted during initialization for S3 resume.
16 RW 0 DO_RCOMP. When set, an RCOMP will be issued to the rank specified in the
RANK field.
15 RW 0 DO_ZQCL. When set, a ZQCL will be issued to the rank specified in the RANK
field.
14 RW 0 WRDQDQS_MASK. When set, the Write DQ-DQS training will be skipped.
13 RW 0 WRLEVEL_MASK. When set, the Write Levelization step will be skipped.
12 RW 0 RDDQDQS_MASK. When set, the Read DQ-DQS step will be skipped.
11 RW 0 RCVEN_MASK. When set, the RCVEN step will be skipped.
10 WO 0 RESET_FIFOS. When set, the TX and RX FIFO pointers will be reset at the next
BCLK edge. The Bubble Generators will also be reset.
9 RW 0 IGNORE_RX. When set, the read return datapath will ignore all data coming
from the RX FIFOS. This is done by gating the early valid bit.
8 RW 0 STOP_ON_FAIL. When set along with the AUTORESETDIS not being set, the
phyinit FSM will stop if a step has not completed after timing out.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 89
Register Description
2.15.3 MC_CHANNEL_0_DIMM_INIT_PARAMS
MC_CHANNEL_1_DIMM_INIT_PARAMS
MC_CHANNEL_2_DIMM_INIT_PARAMS
Initialization sequence parameters are stored in this register. Each field is 2^n count.
Bits [24:22] control the logical to physical rank mapping. The Integrated Memory
Controller needs to know the location of different ranks in order to drive the proper chip
selects (CS#) and Clock Enable (CKE). Each valid combination results in a different
mapping of CS or CKE connections to the logical ranks. The table below summarizes
the supported combinations.
7:5 RW 0 RANK. The rank currently being tested. The PhyInit FSM must be sequenced
for every rank present in the channel. The rank value is set to the rank being
trained.
4:2 RW 0 NXT_PHYINIT_STATE. Set to sequence the physical layer state machine.
000: IDLE
001: RD DQ-DQS
010: RcvEn Bitlock
011: Write Level
100: WR DQ-DQS.
1 RW 0 AUTODIS. Disables the automatic training where each step is automatically
incremented. When set, the physical layer state machine must be sequenced
with software. The training FSM must be sequenced using the
NXT_PHYINIT_STATE field.
0 WO 0 TRAIN. Cycle through the training sequence for the rank specified in the RANK
field.
Device: 4, 5, 6
Function: 0
Offset: 54h
Access as a Dword
Bit Type Reset
Value Description
3DP[24] SQRP[23] QRP[22] Notes
1 0 0 3 DIMMs Per Channel (6ODT/6CS)
0 1 1 Single Quad Rank (2ODT/4CS)
0 0 1 Quad Rank plus another DIMM (4ODT/8CS)
0 0 0 All other configurations.
Register Description
90 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Device: 4, 5, 6
Function: 0
Offset: 58h
Access as a Dword
Bit Type Reset
Value Description
26 RW 0 DIS_3T. When set, 3T mode will not be enabled as a part of the MRS write to
the RDIMM. The RC2 write to switch to 3T and back to 1T timing before and
after an MRS write will not be done if the bit is set. This bit should be set if the
RDIMM supports auto MRS cycles where the dimm takes care of the 3T
switching on MRS writes.
25 RW 0 DIS_AI. When set, address inversion will not be disabled as a part of the MRS
write to the RDIMM. The RC0 write to disable and enable address inversion will
not be done. This bit should be set if the RDIMM supports auto MRS cycles
where the dimm takes care of disabling address inversion for MRS writes.
24 RW 0 THREE_DIMMS_PRESENT. Set when channel contains three DIMMs.
THREE_DIMMS_PRESENT=1 and QUAD_RANK_PRESENT=1 (or
SINGLE_QUAD_RANK_PRESENT=1) are mutually exclusive.
23 RW 0 SINGLE_QUAD_RANK_PRESENT. Set when channel contains a single quad
rank DIMM.
22 RW 0 QUAD_RANK_PRESENT. Set when channel contains 1 or 2 quad rank DIMMs.
21:17 RW 15 WRDQDQS_DELAY. Specifies the delay in DCLKs between reads and writes for
WRDQDQS training.
16 RW 0 WRLEVEL_DELAY. Specifies the delay used between write CAS indications for
write leveling training.
0: 16 DCLKs.
1: 32 DCLKs.
15 RW 0 REGISTERED_DIMM. Set when channel contains registered DIMMs.
14:10 RW 0 PHY_FSM_DELAY. Global timer used for bounding the physical layer training.
If the timer expires, the FSM will go to the next step and the counter will be
reloaded with PHY_FSM_DELAY value. Units are 2^n dclk.
9:5 RW 0 BLOCK_CKE_DELAY. Delay in ns from when clocks and command are valid to
the point CKE is allowed to be asserted. Units are in 2^n uclk.
4:0 RW 0 RESET_ON_TIME. Reset will be asserted for the time specified. Units are 2^n
Uclk.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 91
Register Description
2.15.4 MC_CHANNEL_0_DIMM_INIT_STATUS
MC_CHANNEL_1_DIMM_INIT_STATUS
MC_CHANNEL_2_DIMM_INIT_STATUS
The initialization state is stored in this register. This register is cleared on a new
training command.
Device: 4, 5, 6
Function: 0
Offset: 5Ch
Access as a Dword
Bit Type Reset
Value Description
9 RO 0 RCOMP_CMPLT. When set, indicates that RCOMP command has complete.
This bit is cleared by hardware on command issuance and set once the
command is complete.
8 RO 0 INIT_CMPLT. This bit is cleared when a new training command is issued. It is
set once the sequence is complete regardless of whether all steps passed or
not.
7 RO 0 ZQCL_CMPLT. When set, indicates that ZQCL command has completed. This
bit is cleared by hardware on command issuance and set once the command is
complete.
6 RO 0 WR_DQ_DQS_PASS. Set after a training command when the Write DQ-DQS
training step passes. The bit is cleared by hardware when a new training
command is sent.
5 RO 0 WR_LEVEL_PASS. Set after a training command when the write leveling
training step passes. The bit is cleared by hardware when a new training
command is sent.
4 RO 0 RD_RCVEN_PASS. Set after a training command when the Read Receive
Enable training step passes. The bit is cleared by hardware when a new training
command is sent.
3 RO 0 RD_DQ_DQS_PASS. Set after a training command when the Read DQ-DQS
training step passes. The bit is cleared by hardware when a new training
command is sent.
2:0 RO 0 PHYFSMSTATE. The current state of the top level training FSM.
000: IDLE
001: RD DQ-DQS
010: RcvEn Bitlock
011: Write Level
100: WR DQ-DQS
Register Description
92 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.5 MC_CHANNEL_0_DDR3CMD
MC_CHANNEL_1_DDR3CMD
MC_CHANNEL_2_DDR3CMD
DDR3 Configuration Command. This register is used to issue commands to the DIMMs
such as MRS commands. The register is used by setting one of the *_VALID bits along
with the appropriate address and destination RANK. The command is then issued
directly to the DIMM. Care must be taken in using this register as there is no
enforcement of timing parameters related to the action taken by a DDR3CMD write.
This register has no effect after MC_CONTROL.INIT_DONE is set.
Device: 4, 5, 6
Function: 0
Offset: 60h
Access as a Dword
Bit Type Reset
Value Description
28 RW 0 PRECHARGE_VALID. Indicates current command is for a precharge
command.
27 RW 0 ACTIVATE_VALID. Indicates current command is for an activate command.
26 RW 0 REG_VALID. Indicates current command is for a registered DIMM config write
Bit is cleared by hardware on issuance. This bit applies only to processors
supporting registered DIMMs.
25 RW 0 WR_VALID. Indicates current command is for a write CAS. Bit is cleared by
hardware on issuance.
24 RW 0 RD_VALID. Indicates current command is for a read CAS. Bit is cleared by
hardware on issuance.
23 RW 0 MRS_VALID. Indicates current command is an MRS command. Bit is cleared
by hardware on issuance.
22:20 RW 0 RANK. Destination rank for command.
19:16 RW 0 MRS_BA. Address bits driven to DDR_BA[2:0] pins for the DRAM command
being issued due to a valid bit being set in this register.
15:0 RW 0 MRS_ADDR. Address bits driven to DDR_MA pins for the DRAM command
being issued due to a valid bit being set in this register.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 93
Register Description
2.15.6 MC_CHANNEL_0_REFRESH_THROTTLE_SUPPORT
MC_CHANNEL_1_REFRESH_THROTTLE_SUPPORT
MC_CHANNEL_2_REFRESH_THROTTLE_SUPPORT
This register supports Self Refresh and Thermal Throttle functions.
2.15.7 MC_CHANNEL_0_MRS_VALUE_0_1
MC_CHANNEL_1_MRS_VALUE_0_1
MC_CHANNEL_2_MRS_VALUE_0_1
The initial MRS register values for MR0, and MR1 can be specified in this register. These
values are used for the automated MRS writes used as a part of the training FSM. The
remaining values of the MRS register must be specified here.
Device: 4, 5, 6
Function: 0
Offset: 68h
Access as a Dword
Bit Type Reset
Value Description
3:2 RW 0 INC_ENTERPWRDWN_RATE. Powerdown rate will be increased during
thermal throttling based on the following configurations.
00: tRANKIDLE (Default)
01: 16
10: 24
11: 32
1 RW 0 DIS_OP_REFRESH. When set, the refresh engine will not issue opportunistic
refresh.
0 RW 0 ASR_PRESENT. When set, indicates DRAMs on this channel can support
Automatic Self Refresh. If the DRAM is not supporting ASR (Auto Self Refresh),
then Self Refresh entry will be delayed until the temperature is below the 2x
refresh temperature.
Device: 4, 5, 6
Function: 0
Offset: 70h
Access as a Dword
Bit Type Reset
Value Description
31:16 RW 0 MR1. The values to write to MR1 for A15:A0.
15:0 RW 0 MR0. The values to write to MR0 for A15:A0.
Register Description
94 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.8 MC_CHANNEL_0_MRS_VALUE_2
MC_CHANNEL_1_MRS_VALUE_2
MC_CHANNEL_2_MRS_VALUE_2
The initial MRS register values for MR2. This register also contains the values used for
RC0 and RC2 writes for registered DIMMs. These values are used during the automated
training sequence when MRS writes or registered DIMM RC writes are used. The RC
fields do not need to be programmed if the address inversion and 3T/1T transitions are
disabled.
2.15.9 MC_CHANNEL_0_RANK_PRESENT
MC_CHANNEL_1_RANK_PRESENT
MC_CHANNEL_2_RANK_PRESENT
This register provides the rank present vector.
Device: 4, 5, 6
Function: 0
Offset: 74h
Access as a Dword
Bit Type Reset
Value Description
23:20 RW 0 RC2. The values to write to the RC2 register on RDIMMS. This value will be
written whenever 3T or 1T timings are enabled by hardware. For this reason bit
1 of the RC2 field (bit 21 of this register) will be controlled by hardware.
[23:22] and [20] will be driven with the RDIMM register write command for
RC2.
19:16 RW 0 RC0. The values to write to the RC0 register on RDIMMS. This value will be
written whenever address inversion is enabled or disabled by hardware. For this
reason bit 0 of the RC0 field (bit 16 of this register) will be controlled by
hardware. [19:17] will be driven with the RDIMM register write command for
RC0.
15:0 RW 0 MR2. The values to write to MR2 for A15:A0.
Device: 4, 5, 6
Function: 0
Offset: 7Ch
Access as a Dword
Bit Type Reset
Value Description
7:0 RW 0 RANK_PRESENT. Vector that represents the ranks that are present. Each bit
represents a logical rank. When two or fewer DIMMs are present, [3:0]
represents the four possible ranks in DIMM0 and [7:4] represents the ranks
that are possible in DIMM1. When three DIMMs are present, then the following
applies:
[1:0] represents ranks 1:0 in Slot 0
[3:2] represents ranks 3:2 in Slot 1
[5:4] represents ranks 5:4 in Slot 2
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 95
Register Description
2.15.10 MC_CHANNEL_0_RANK_TIMING_A
MC_CHANNEL_1_RANK_TIMING_A
MC_CHANNEL_2_RANK_TIMING_A
This register contains parameters that specify the rank timing used. All parameters are
in DCLK.
Device: 4, 5, 6
Function: 0
Offset: 80h
Access as a Dword
Bit Type Reset
Value Description
28:26 RW 0 tddWrTRd. Minimum delay between a write followed by a read to different
DIMMs.
000: 1
001: 2
010: 3
011: 4
100: 5
101: 6
110: 7
111: 8
25:23 RW 0 tdrWrTRd. Minimum delay between a write followed by a read to different
ranks on the same DIMM.
000: 1
001: 2
010: 3
011: 4
100: 5
101: 6
110: 7
111: 8
22:19 RW 0 tsrWrTRd. Minimum delay between a write followed by a read to the same
rank.
0000: 10
0001: 11
0010: 12
0011: 13
0100: 14
0101: 15
0110: 16
0111: 17
1000: 18
1001: 19
1010: 20
1011: 21
1100: 22
1101: RSVD
1110: RSVD
1111: RSVD
Register Description
96 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
18:15 RW 0 tddRdTWr. Minimum delay between Read followed by a Write to different
DIMMs.
0000: 2
0001: 3
0010: 4
0011: 5
0100: 6
0101: 7
0110: 8
0111: 9
1000: 10
1001: 11
1010: 12
1011: 13
1100: 14
1101: RSVD
1110: RSVD
1111: RSVD
14:11 RW 0 tdrRdTWr. Minimum delay between Read followed by a write to different ranks
on the same DIMM.
0000: 2
0001: 3
0010: 4
0011: 5
0100: 6
0101: 7
0110: 8
0111: 9
1000: 10
1001: 11
1010: 12
1011: 13
1100: 14
1101: RSVD
1110: RSVD
1111: RSVD
10:7 RW 0 tsrRdTWr. Minimum delay between Read followed by a write to the same rank.
0000: RSVD
0001: RSVD
0010: RSVD
0011: 5
0100: 6
0101: 7
0110: 8
0111: 9
1000: 10
1001: 11
1010: 12
1011: 13
1100: 14
1101: RSVD
1110: RSVD
1111: RSVD
Device: 4, 5, 6
Function: 0
Offset: 80h
Access as a Dword
Bit Type Reset
Value Description
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 97
Register Description
6:4 RW 0 tddRdTRd. Minimum delay between reads to different DIMMs.
000: 2
001: 3
010: 4
011: 5
100: 6
101: 7
110: 8
111: 9
3:1 RW 0 tdrRdTRd. Minimum delay between reads to different ranks on the same
DIMM.
000: 2
001: 3
010: 4
011: 5
100: 6
101: 7
110: 8
111: 9
0 RW 0 tsrRdTRd. Minimum delay between reads to the same rank.
0: 4
1: 6
Device: 4, 5, 6
Function: 0
Offset: 80h
Access as a Dword
Bit Type Reset
Value Description
Register Description
98 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.11 MC_CHANNEL_0_RANK_TIMING_B
MC_CHANNEL_1_RANK_TIMING_B
MC_CHANNEL_2_RANK_TIMING_B
This register contains parameters that specify the rank timing used. All parameters are
in DCLK.
Device: 4, 5, 6
Function: 0
Offset: 84h
Access as a Dword
Bit Type Reset
Value Description
20:16 RW 0 B2B_CAS_DELAY. Controls the delay between CAS commands in DCLKS. The
minimum spacing is 4 DCLKS. Values below 3 have no effect. A value of 0
disables the logic. Setting the value between 3-31 also spaces the read data by
0-29 DCLKS. The value entered is one less than the spacing required, i.e. a
spacing of 5 DCLKS between CAS commands (or 1 DCLK on the read data)
requires a setting of 4.
15:13 RW 0 tddWrTWr. Minimum delay between writes to different DIMMs.
000: 2
001: 3
010: 4
011: 5
100: 6
101: 7
110: 8
111: 9
12:10 RW 0 tdrWrTWr. Minimum delay between writes to different ranks on the same
DIMM.
000: 2
001: 3
010: 4
011: 5
100: 6
101: 7
110: 8
111: 9
9 RW 0 tsrWrTWr. Minimum delay between writes to the same rank.
0: 4
1: 6
8:6 RW 0 tRRD. Specifies the minimum time between activate commands to the same
rank.
5:0 RW 0 tFAW. Four Activate Window. Specifies the time window in which four activates
are allowed the same rank.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 99
Register Description
2.15.12 MC_CHANNEL_0_BANK_TIMING
MC_CHANNEL_1_BANK_TIMING
MC_CHANNEL_2_BANK_TIMING
This register contains parameters that specify the bank timing parameters. These
values are in DCLK. The values in these registers are encoded where noted. All of these
values apply to commands to the same rank only.
2.15.13 MC_CHANNEL_0_REFRESH_TIMING
MC_CHANNEL_1_REFRESH_TIMING
MC_CHANNEL_2_REFRESH_TIMING
This register contains parameters that specify the refresh timings. Units are in DCLK.
Device: 4, 5, 6
Function: 0
Offset: 88h
Access as a Dword
Bit Type Reset
Value Description
21:17 RW 0 tWTPr. Minimum Write CAS to Precharge command delay.
16:13 RW 0 tRTPr. Minimum Read CAS to Precharge command delay.
12:9 RW 0 tRCD. Minimum delay between Activate and CAS commands.
8:4 RW 0 tRAS. Minimum delay between Activate and Precharge commands.
3:0 RW 0 tRP. Minimum delay between Precharge command and Activate command.
Device: 4, 5, 6
Function: 0
Offset: 8Ch
Access as a Dword
Bit Type Reset
Value Description
29:19 RW 0 tTHROT_OPPREF. The minimum time between two opportunistic refreshes.
Should be set to tRFC in DCLKS. Zero is an invalid encoding. A value of 1 should
be programmed to disable the throttling of opportunistic refreshes. By setting this
field to tRFC, current to a single DIMM can be limited to that required to support
this scenario without significant performance impact:
- 8 panic refreshes in tREFI to one rank
- 1 opportunistic refresh every tRFC to another rank
- full bandwidth delivered by the third and fourth ranks
Platforms that can supply peak currents to the DIMMs should disable opportunistic
refresh throttling for max performance.
18:9 RW 0 tREFI_8. Average periodic refresh interval divided by 8.
8:0 RW 0 tRFC. Delay between the refresh command and an activate or refresh command.
Register Description
100 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.14 MC_CHANNEL_0_CKE_TIMING
MC_CHANNEL_1_CKE_TIMING
MC_CHANNEL_2_CKE_TIMING
This register contains parameters that specify the CKE timings. All units are in DCLK.
2.15.15 MC_CHANNEL_0_ZQ_TIMING
MC_CHANNEL_1_ZQ_TIMING
MC_CHANNEL_2_ZQ_TIMING
This register contains parameters that specify ZQ timing. All units are DCLK unless
otherwise specified. The register encodings are specified where applicable.
Device: 4, 5, 6
Function: 0
Offset: 90h
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 0 tRANKIDLE. Rank will go into powerdown after it has been idle for the
specified number of dclks. tRANKIDLE covers max(txxxPDEN). Minimum value
is tWRAPDEN. If CKE is being shared between ranks then both ranks must be
idle for this amount of time. A Power Down Entry command will be requested
for a rank after this number of DCLKs if no request to the rank is in the MC.
23:21 RW 0 tXP. Minimum delay from exit power down with DLL and any valid command.
Exit Precharge Power Down with DLL frozen to commands not requiring a
locked DLL. Slow exit precharge powerdown is not supported.
20:11 RW 0 tXSDLL. Minimum delay between the exit of self refresh and commands that
require a locked DLL.
10:3 RW 0 tXS. Minimum delay between the exit of self refresh and commands not
requiring a DLL.
2:0 RW 0 tCKE. CKE minimum pulse width.
Device: 4, 5, 6
Function: 0
Offset: 94h
Access as a Dword
Bit Type Reset
Value Description
30 RW 1 Parallel_ZQ. Enable ZQ calibration to different ranks in parallel.
29 RW 1 tZQenable. Enable the issuing of periodic ZQCS calibration commands.
28:8 RW 16410 ZQ_Interval. Nominal interval between periodic ZQ calibration in increments
of maintenance counter intervals.
7:5 RW 4 tZQCS. Specifies ZQCS cycles in increments of 16. This is the minimum delay
between ZQCS and any other command. This register should be programmed to
at least 64/16=4='100' to conform to the DDR3 spec.
4:0 RW 0 tZQInit. Specifies ZQInit cycles in increments of 32. This is the minimum delay
between ZQCL and any other command. This register should be programmed to
at least 512/32=16='10000' to conform to the DDR3 spec.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 101
Register Description
2.15.16 MC_CHANNEL_0_RCOMP_PARAMS
MC_CHANNEL_1_RCOMP_PARAMS
MC_CHANNEL_2_RCOMP_PARAMS
This register contains parameters that specify Rcomp timings.
2.15.17 MC_CHANNEL_0_ODT_PARAMS1
MC_CHANNEL_1_ODT_PARAMS1
MC_CHANNEL_2_ODT_PARAMS1
This register contains parameters that specify ODT timings. All values are in DCLK.
Device: 4, 5, 6
Function: 0
Offset: 98h
Access as a Dword
Bit Type Reset
Value Description
16 RW 1 RCOMP_EN. Enable Rcomp. When set, the Integrated Memory Controller will
do the programmed blocking of requests and send indications.
15:10 RW 2 RCOMP_CMD_DCLK. Delay from the start of an RCOMP command blocking
period in which the command rcomp update is done. Program this field to 15 for
all configurations.
9:4 RW 9 RCOMP_LENGTH. Number of Dclks during which all commands are blocked for
an RCOMP update. Data RCOMP update is done on the last DCLK of this period.
Program this field to 31 for all configurations.
3:0 RW 0 RCOMP_INTERVAL. Duration of interval between Rcomp in increments of
maintenance counter intervals. Register value is (maintenance counter
intervals-1). For example, a setting of 0 will produce one maintenance counter
interval.
Device: 4, 5, 6
Function: 0
Offset: 9Ch
Access as a Dword
Bit Type Reset
Value Description
26:24 RW 0 TAOFD. ODT turn off delay.
23:20 RW 6 MCODT_DURATION. Controls the duration of MC ODT activation. BL/2 + 2.
19:16 RW 4 MCODT_DELAY. Controls the delay from Rd CAS to MC ODT activation. This
value is tCAS-1.
15:12 RW 5 ODT_RD_DURATION. Controls the duration of Rd ODT activation. This value
is BL/2 + 2.
11:8 RW 0 ODT_RD_DELAY. Controls the delay from Rd CAS to ODT activation. This
value is tCAS-tWL.
7:4 RW 5 ODT_WR_DURATION. Controls the duration of Wr ODT activation. value is
BL/2 + 2.
3:0 RW 0 ODT_WR_DELAY. Controls the delay from Wr CAS to ODT activation. This
value is always 0.
Register Description
102 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.18 MC_CHANNEL_0_ODT_PARAMS2
MC_CHANNEL_1_ODT_PARAMS2
MC_CHANNEL_2_ODT_PARAMS2
The FORCE_ODT fields are directly mapped to pins. When the force bits are set, the
corresponding pin on the interface is always driven high regardless of the cycle that is
being generated. This register is used in debug only and not during normal operation.
2.15.19 MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_RD
MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_RD
MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_RD
This register contains the ODT activation matrix for RANKS 0 to 3 for Reads.
Device: 4, 5, 6
Function: 0
Offset: A0h
Access as a Dword
Bit Type Reset
Value Description
9 RW 0 MCODT_Writes. Drive MC ODT on reads and writes.
8 RW 0 FORCE_MCODT. Force MC ODT to always be asserted.
7 RW 0 RSVD.
6 RW 0 RSVD.
5 RW 0 FORCE_ODT5. Force ODT pin 5 to always be asserted.
4 RW 0 FORCE_ODT4. Force ODT pin 4 to always be asserted.
3 RW 0 FORCE_ODT3. Force ODT pin 3 to always be asserted.
2 RW 0 FORCE_ODT2. Force ODT pin 2 to always be asserted.
1 RW 0 FORCE_ODT1. Force ODT pin 1 to always be asserted.
0 RW 0 FORCE_ODT0. Force ODT pin 0 to always be asserted.
Device: 4, 5, 6
Function: 0
Offset: A4h
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 1 ODT_RD3. Bit patterns driven out onto ODT pins when Rank3 is read.
23:16 RW 1 ODT_RD2. Bit patterns driven out onto ODT pins when Rank2 is read.
15:8 RW 4 ODT_RD1. Bit patterns driven out onto ODT pins when Rank1 is read.
7:0 RW 4 ODT_RD0. Bit patterns driven out onto ODT pins when Rank0 is read.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 103
Register Description
2.15.20 MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_RD
MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_RD
MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_RD
This register contains the ODT activation matrix for RANKS 4 to 7 for Reads.
2.15.21 MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_WR
MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_WR
MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_WR
This register contains the ODT activation matrix for RANKS 0 to 3 for Writes.
2.15.22 MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_WR
MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_WR
MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_WR
This register contains the ODT activation matrix for RANKS 4 to 7 for Writes.
Device: 4, 5, 6
Function:)0
Offset: A8h
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 1 ODT_RD7. Bit patterns driven out onto ODT pins when Rank7 is read.
23:16 RW 1 ODT_RD6. Bit patterns driven out onto ODT pins when Rank6 is read.
15:8 RW 4 ODT_RD5. Bit patterns driven out onto ODT pins when Rank5 is read.
7:0 RW 4 ODT_RD4. Bit patterns driven out onto ODT pins when Rank4 is read.
Device: 4, 5, 6
Function: 0
Offset: ACh
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 9 ODT_WR3. Bit patterns driven out onto ODT pins when Rank3 is written.
23:16 RW 5 ODT_WR2. Bit patterns driven out onto ODT pins when Rank2 is written.
15:8 RW 6 ODT_WR1. Bit patterns driven out onto ODT pins when Rank1 is written.
7:0 RW 5 ODT_WR0. Bit patterns driven out onto ODT pins when Rank0 is written.
Device: 4, 5, 6
Function: 0
Offset: B0h
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 9 ODT_WR7. Bit patterns driven out onto ODT pins when Rank7 is written.
23:16 RW 5 ODT_WR6. Bit patterns driven out onto ODT pins when Rank6 is written.
15:8 RW 6 ODT_WR5. Bit patterns driven out onto ODT pins when Rank5 is written.
7:0 RW 5 ODT_WR4. Bit patterns driven out onto ODT pins when Rank4 is written
Register Description
104 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.23 MC_CHANNEL_0_WAQ_PARAMS
MC_CHANNEL_1_WAQ_PARAMS
MC_CHANNEL_2_WAQ_PARAMS
This register contains parameters that specify settings for the Write Address Queue.
2.15.24 MC_CHANNEL_0_SCHEDULER_PARAMS
MC_CHANNEL_1_SCHEDULER_PARAMS
MC_CHANNEL_2_SCHEDULER_PARAMS
These are the parameters used to control parameters within the scheduler.
Device: 4, 5, 6
Function: 0
Offset: B4h
Access as a Dword
Bit Type Reset
Value Description
29:25 RW 6 PRECASWRTHRESHOLD. Threshold above which Medium-Low Priority reads
cannot PRE-CAS write requests.
24:20 RW 31 PARTWRTHRESHOLD. Threshold used to raise the priority of underfill
requests in the scheduler. Set to 31 to disable.
19:15 RW 31 ISOCEXITTHRESHOLD. Write Major Mode ISOC Exit Threshold. When the
number of writes in the WAQ drops below this threshold, the MC will exit write
major mode in the presence of a read.
14:10 RW 31 ISOCENTRYTHRESHOLD. Write Major Mode ISOC Entry Threshold. When the
number of writes in the WAQ exceeds this threshold, the MC will enter write
major mode in the presence of a read.
9:5 RW 22 WMENTRYTHRESHOLD. Write Major Mode Entry Threshold. When the number
of writes in the WAQ exceeds this threshold, the MC will enter write major
mode.
4:0 RW 22 WMEXITTHRESHOLD. Write Major Mode Exit Threshold. When the number of
writes in the WAQ drop below this threshold, the MC will exit write major mode.
Device: 4, 5, 6
Function: 0
Offset: B8h
Access as a Dword
Bit Type Reset
Value Description
12 RW 1 CS_FOR_CKE_TRANSITION. Specifies if chip select is to be asserted when
CKE transitions with PowerDown entry/exit and SelfRefresh exit.
11 RW 0 FLOAT_EN. When set, the address and command lines will float to save power
when commands are not being sent out. This setting may not work with
RDIMMs.
10:6 RW 7 PRECASRDTHRESHOLD. Threshold above which Medium-Low Priority reads
can PRE-CAS write requests.
5 RW 0 DISABLE_ISOC_RBC_RESERVE. When set this bit will prevent any RBC's
from being reserved for ISOC.
3 RW 0 ENABLE2N. Enable 2n Timing.
2:0 RW 0 PRIORITYCOUNTER. Upper 3 MSB of 8 bit priority time out counter.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 105
Register Description
2.15.25 MC_CHANNEL_0_MAINTENANCE_OPS
MC_CHANNEL_1_MAINTENANCE_OPS
MC_CHANNEL_2_MAINTENANCE_OPS
This register enables various maintenance operations such as ZQ, RCOMP, etc.
2.15.26 MC_CHANNEL_0_TX_BG_SETTINGS
MC_CHANNEL_1_TX_BG_SETTINGS
MC_CHANNEL_2_TX_BG_SETTINGS
These are the parameters used to set the Start Scheduler for TX clock crossing. This is
used to send commands to the DIMMs.
The NATIVE RATIO is UCLK multiplier of BCLK = U
ALIEN RATION is DCLK multiplier of BCLK = D
PIPE DEPTH = 8 UCLK (design dependent variable)
MIN SEP DELAY = 670ps (design dependent variable, Internally this is logic delay of
FIFO + clock skew between U and D)
TOTAL EFFECTIVE DELAY = PIPE DEPTH * UCLK PERIOD in ps + MIN SEP DELAY
DELAY FRACTION = (TOTAL EFFECTIVE DELAY * D) / (UCLK PERIOD in ps * G.C.D(U,D)
Determine OFFSET MULTIPLE using the equation
FLOOR ((OFFSET MULTIPLE +1) / G.C.D (U,D)) > DELAY FRACTION
OFFSET VALUE = MOD (OFFSET MULTIPLE, U) <= Final answer for OFFSET MULTIPLE
Device: 4, 5, 6
Function: 0
Offset: BCh
Access as a Dword
Bit Type Reset
Value Description
12:0 RW 0 MAINT_CNTR. Value to be loaded in the maintenance counter. This counter
sequences the rate to ZQ, RCOMP in increments of maintenance counter
intervals.
Device: 4, 5, 6
Function: 0
Offset: C0h
Access as a Dword
Bit Type Reset
Value Description
23:16 RW 2 OFFSET. TX offset setting.
15:8 RW 1 ALIENRATIO. Dclk ratio to BCLK. TX Alien Ratio setting.
7:0 RW 4 NATIVERATIO. Uclk ratio to BCLK. TX Native Ratio setting.
Register Description
106 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.27 MC_CHANNEL_0_RX_BGF_SETTINGS
MC_CHANNEL_1_RX_BGF_SETTINGS
MC_CHANNEL_2_RX_BGF_SETTINGS
These are the parameters used to set the Rx clock crossing BGF.
2.15.28 MC_CHANNEL_0_EW_BGF_SETTINGS
MC_CHANNEL_1_EW_BGF_SETTINGS
MC_CHANNEL_2_EW_BGF_SETTINGS
These are the parameters used to set the early warning RX clock crossing BGF.
2.15.29 MC_CHANNEL_0_EW_BGF_OFFSET_SETTINGS
MC_CHANNEL_1_EW_BGF_OFFSET_SETTINGS
MC_CHANNEL_2_EW_BGF_OFFSET_SETTINGS
These are the parameters to set the early warning RX clock crossing BGF.
Device: 4, 5, 6
Function: 0
Offset: C8h
Access as a Dword
Bit Type Reset
Value Description
26:24 RW 2 PTRSEP. RX FIFO pointer separation settings. THIS FIELD IS NOT USED BY
HARDWARE. RX Pointer separation can be modified via the round trip setting
(larger value causes a larger pointer separation).
23:16 RW 0 OFFSET. RX offset setting.
15:8 RW 1 ALIENRATIO. Qclk to BCLK ratio. RX Alien Ratio setting.
7:0 RW 2 NATIVERATIO. Uclk to BCLK ratio. RX Native Ratio setting.
Device: 4, 5, 6
Function: 0
Offset: CCh
Access as a Dword
Bit Type Reset
Value Description
15:8 RW 1 ALIENRATIO. Dclk to Bclk ratio. Early warning Alien Ratio setting.
Device: 4, 5, 6
Function: 0
Offset: D0h
Access as a Dword
Bit Type Reset
Value Description
15:8 RW 2 EVENOFFSET. Early warning even offset setting.
7:0 RW 0 ODDOFFSET. Early warning odd offset setting.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 107
Register Description
2.15.30 MC_CHANNEL_0_ROUND_TRIP_LATENCY
MC_CHANNEL_1_ROUND_TRIP_LATENCY
MC_CHANNEL_2_ROUND_TRIP_LATENCY
These are the parameters to set the early warning RX clock crossing the Bubble
Generator FIFO (BGF) used to go between different clocking domains. These settings
provide the gearing necessary to make that clock crossing.
2.15.31 MC_CHANNEL_0_PAGETABLE_PARAMS1
MC_CHANNEL_1_PAGETABLE_PARAMS1
MC_CHANNEL_2_PAGETABLE_PARAMS1
These are the parameters used to control parameters for page closing policies.
2.15.32 MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH0
MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH1
MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH2
Channel Bubble Generator ratios for CMD and DATA.
Device: 4, 5, 6
Function: 0
Offset: D4h
Access as a Dword
Bit Type Reset
Value Description
7:0 RW 0 ROUND_TRIP_LATENCY. Round trip latency for reads. Units are in UCLK. This
register must be programmed with the appropriate time for read data to be
retuned from the pads after a READ CAS is sent to the DIMMs.
Device: 4, 5, 6
Function: 0
Offset: D8h
Access as a Dword
Bit Type Reset
Value Description
15:8 RW 0 RSVD.
7:0 RW 0 ADAPTIVETIMEOUTCOUNTER. Upper 8 MSBs of a 12-bit counter. This
counter adapts the interval between assertions of the page close flag. For a less
aggressive page close, the length of the count interval is increased and vice
versa for a more aggressive page close policy.
Device: 4, 5, 6
Function: 0
Offset: E0h
Access as a Dword
Bit Type Reset
Value Description
15:8 RW 1 ALIENRATIO. DCLK to BCLK ratio.
7:0 RW 4 NATIVERATIO. UCLK to BCLK ratio.
Register Description
108 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.15.33 MC_TX_BG_CMD_OFFSET_SETTINGS_CH0
MC_TX_BG_CMD_OFFSET_SETTINGS_CH1
MC_TX_BG_CMD_OFFSET_SETTINGS_CH2
Integrated Memory Controller Channel Bubble Generator Offsets for CMD FIFO. The
Data command FIFOs share the settings for channel 0 across all three channels. The
register in Channel 0 must be programmed for all configurations.
2.15.34 MC_TX_BG_DATA_OFFSET_SETTINGS_CH0
MC_TX_BG_DATA_OFFSET_SETTINGS_CH1
MC_TX_BG_DATA_OFFSET_SETTINGS_CH2
Integrated Memory Controller Channel Bubble Generator Offsets for DATA FIFO.
Device: 4, 5, 6
Function: 0
Offset: E4h
Access as a Dword
Bit Type Reset
Value Description
9:8 RW 0 PTROFFSET. FIFO pointer offset.
7:0 RW 0 BGOFFSET. BG offset.
Device: 4, 5, 6
Function: 0
Offset: E8h
Access as a Dword
Bit Type Reset
Value Description
16:14 RW 0 RDPTROFFSET. Read FIFO pointer offset.
13:10 RW 0 WRTPTROFFSET. Write FIFO pointer offset.
9:8 RW 0 PTROFFSET. FIFO pointer offset.
7:0 RW 0 BGOFFSET. BG offset.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 109
Register Description
2.16 Integrated Memory Controller Channel Address
Registers
2.16.1 MC_DOD_CH0_0
MC_DOD_CH0_1
MC_DOD_CH0_2
Channel 0 DIMM Organization Descriptor Register.
Device: 4
Function: 1
Offset: 48h, 4Ch, 50h
Access as a Dword
Bit Type Reset
Value Description
12:10 RW 0 RANKOFFSET. Rank Offset for calculating RANK. This corresponds to the first
logical rank on the DIMM. The rank offset is always programmed to 0 for the
DIMM 0 DOD registers. (DIMM 0 rank offset is always 0.) DIMM 1 DOD rank
offset is either 4 for two DIMMs per channel or 2 if there are three DIMMs per
channel. DIMM2 DOD rank offset is always 4 as it is only used in three DIMMs
per channel case.
9 RW 0 DIMMPRESENT. DIMM slot is populated.
8:7 RW 0 NUMBANK. Defines the number of (real, not shadow) banks on these DIMMs.
00: Four-banked
01: Eight-banked
10: Sixteen-banked
6:5 RW 0 NUMRANK. Number of Ranks. Defines the number of ranks on these DIMMs.
00: Single Ranked
01: Double Ranked
10: Quad Ranked
4:2 RW 0 NUMROW. Number of Rows. Defines the number of rows within these DIMMs.
000: 2^12 Rows
001: 2^13 Rows
010: 2^14 Rows
011: 2^15 Rows
100: 2^16 Rows
1:0 RW 0 NUMCOL. Number of Columns. Defines the number of columns within on these
DIMMs.
00: 2^10 columns
01: 2^11 columns
10: 2^12 columns
11: RSVD.
Register Description
110 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.16.2 MC_DOD_CH1_0
MC_DOD_CH1_1
MC_DOD_CH1_2
Channel 1 DIMM Organization Descriptor Register.
Device: 5
Function: 1
Offset: 48h, 4Ch, 50h
Access as a Dword
Bit Type Reset
Value Description
12:10 RW 0 RANKOFFSET. Rank Offset for calculating RANK. This corresponds to the first
logical rank on the DIMM. The rank offset is always programmed to 0 for the
DIMM 0 DOD registers. (DIMM 0 rank offset is always 0.) DIMM 1 DOD rank
offset is either 4 for two DIMMs per channel or 2 if there are three DIMMs per
channel. DIMM2 DOD rank offset is always 4 as it is only used in three DIMMs
per channel case.
9 RW 0 DIMMPRESENT. DIMM slot is populated.
8:7 RW 0 NUMBANK. Defines the number of (real, not shadow) banks on these DIMMs.
00: Four-banked
01: Eight-banked
10: Sixteen-banked
6:5 RW 0 NUMRANK. Number of Ranks. Defines the number of ranks on these DIMMs.
00: Single Ranked
01: Double Ranked
10: Quad Ranked
4:2 RW 0 NUMROW. Number of Rows. Defines the number of rows within these DIMMs.
000: 2^12 Rows
001: 2^13 Rows
010: 2^14 Rows
011: 2^15 Rows
100: 2^16 Rows
1:0 RW 0 NUMCOL. Number of Columns. Defines the number of columns within on these
DIMMs.
00: 2^10 columns
01: 2^11 columns
10: 2^12 columns
11: RSVD.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 111
Register Description
2.16.3 MC_DOD_CH2_0
MC_DOD_CH2_1
MC_DOD_CH2_2
Channel 2 DIMM Organization Descriptor Register.
Device: 6
Function: 1
Offset: 48h, 4Ch, 50h
Access as a Dword
Bit Type Reset
Value Description
12:10 RW 0 RANKOFFSET. Rank Offset for calculating RANK. This corresponds to the first
logical rank on the DIMM. The rank offset is always programmed to 0 for the
DIMM 0 DOD registers. (DIMM 0 rank offset is always 0.) DIMM 1 DOD rank
offset is either 4 for two DIMMs per channel or 2 if there are three DIMMs per
channel. DIMM2 DOD rank offset is always 4 as it is only used in three DIMMs
per channel case.
9 RW 0 DIMMPRESENT. DIMM slot is populated.
8:7 RW 0 NUMBANK. Defines the number of (real, not shadow) banks on these DIMMs.
00: Four-banked
01: Eight-banked
10: Sixteen-banked
6:5 RW 0 NUMRANK. Defines the number of ranks on these DIMMs.
00: Single Ranked
01: Double Ranked
10: Quad Ranked
4:2 RW 0 NUMROW. Defines the number of rows within these DIMMs.
000: 2^12 Rows
001: 2^13 Rows
010: 2^14 Rows
011: 2^15 Rows
100: 2^16 Rows
1:0 RW 0 NUMCOL. Defines the number of columns within on these DIMMs.
00: 2^10 columns
01: 2^11 columns
10: 2^12 columns
11: RSVD
Register Description
112 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.16.4 MC_SAG_CH0_0
MC_SAG_CH0_1
MC_SAG_CH0_2
MC_SAG_CH0_3
MC_SAG_CH0_4
MC_SAG_CH0_5
MC_SAG_CH0_6
MC_SAG_CH0_7
MC_SAG_CH1_0
MC_SAG_CH1_1
MC_SAG_CH1_2
MC_SAG_CH1_3
MC_SAG_CH1_4
MC_SAG_CH1_5
MC_SAG_CH1_6
MC_SAG_CH1_7
MC_SAG_CH2_0
MC_SAG_CH2_1
MC_SAG_CH2_2
MC_SAG_CH2_3
MC_SAG_CH2_4
MC_SAG_CH2_5
MC_SAG_CH2_6
MC_SAG_CH2_7
Channel Segment Address Registers. For each of the 8 interleave ranges, they specify
the offset between the System Address and the Memory Address and the System
Address bits used for level 1 interleave, which should not be translated to Memory
Address bits. Memory Address is calculated from System Address and the contents of
these registers by the following algorithm:
m[39:16] = SystemAddress[39:16] + (sign extend {Offset[23:0]});
m[15:6] = SystemAddress[15:6];
If (Removed[2]) {bit 8 removed};
If (Removed[1]) {bit 7 removed};
If (Removed[0]) {bit 6 removed};
MemoryAddress[36:6] = m[36:6];
The table below summarizes the combinations of removed bits and divide-by-3
operations for the various supported interleave configurations. All other combinations
are not supported.
Note: If any of bits [8:6] are removed, the higher order bits are shifted down.
Removed [8:6] Divide-By-3 Interleave
000 0 None
001 0 2-Way
011 0 4-Way
000 1 3-Way
001 1 6-Way
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 113
Register Description
2.17 Integrated Memory Controller Channel Rank
Registers
2.17.1 MC_RIR_LIMIT_CH0_0
MC_RIR_LIMIT_CH0_1
MC_RIR_LIMIT_CH0_2
MC_RIR_LIMIT_CH0_3
MC_RIR_LIMIT_CH0_4
MC_RIR_LIMIT_CH0_5
MC_RIR_LIMIT_CH0_6
MC_RIR_LIMIT_CH0_7
MC_RIR_LIMIT_CH1_0
MC_RIR_LIMIT_CH1_1
MC_RIR_LIMIT_CH1_2
MC_RIR_LIMIT_CH1_3
MC_RIR_LIMIT_CH1_4
MC_RIR_LIMIT_CH1_5
MC_RIR_LIMIT_CH1_6
MC_RIR_LIMIT_CH1_7
MC_RIR_LIMIT_CH2_0
MC_RIR_LIMIT_CH2_1
MC_RIR_LIMIT_CH2_2
MC_RIR_LIMIT_CH2_3
MC_RIR_LIMIT_CH2_4
MC_RIR_LIMIT_CH2_5
MC_RIR_LIMIT_CH2_6
MC_RIR_LIMIT_CH2_7
Device: 4
Function: 1
Offset: 80h, 84h, 88h, 8Ch, 90h, 94h, 98h, 9Ch
Access as a Dword
Bit Type Reset
Value Description
27 RW 0 DIVBY3. This bit indicates the rule is a 3 or 6 way interleave.
26:24 RW 0 REMOVED. These are the bits to be removed after offset subtraction. These
bits correspond to System Address [8,7,6].
23:0 RW 0 OFFSET. This value should be subtracted from the current system address to
create a contiguous address space within a channel. BITS 9:0 ARE RESERVED
AND MUST ALWAYS BE SET TO 0.
Register Description
114 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
Channel Rank Limit Range Registers.
2.17.2 MC_RIR_WAY_CH0_0
MC_RIR_WAY_CH0_1
MC_RIR_WAY_CH0_2
MC_RIR_WAY_CH0_3
MC_RIR_WAY_CH0_4
MC_RIR_WAY_CH0_5
MC_RIR_WAY_CH0_6
MC_RIR_WAY_CH0_7
MC_RIR_WAY_CH0_8
MC_RIR_WAY_CH0_9
MC_RIR_WAY_CH0_10
MC_RIR_WAY_CH0_11
MC_RIR_WAY_CH0_12
MC_RIR_WAY_CH0_13
MC_RIR_WAY_CH0_14
MC_RIR_WAY_CH0_15
MC_RIR_WAY_CH0_16
MC_RIR_WAY_CH0_17
MC_RIR_WAY_CH0_18
MC_RIR_WAY_CH0_19
MC_RIR_WAY_CH0_20
MC_RIR_WAY_CH0_21
MC_RIR_WAY_CH0_22
MC_RIR_WAY_CH0_23
MC_RIR_WAY_CH0_24
MC_RIR_WAY_CH0_25
MC_RIR_WAY_CH0_26
MC_RIR_WAY_CH0_27
MC_RIR_WAY_CH0_28
MC_RIR_WAY_CH0_29
MC_RIR_WAY_CH0_30
MC_RIR_WAY_CH0_31
Channel Rank Interleave Way Range Registers. These registers allow the user to define
the ranks and offsets that apply to the ranges defined by the LIMIT in the
MC_RIR_LIMIT_CH registers. The mappings are as follows:
RIR_LIMIT_CH{chan}[0] -> RIR_WAY_CH{chan}[3:0]
Device: 4
Function: 2
Offset: 40h, 44h, 48h, 4Ch, 50h, 54h, 58h, 5Ch
Access as a Dword
Bit Type Reset
Value Description
9:0 RW 0 LIMIT. This specifies the top of the range being mapped to the ranks specified
in the MC_RIR_WAY_CH registers. The most significant bits of the lowest
address in this range is one greater than the limit field in the RIR register with
the next lower index. This field is compared against MA[37:28].
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 115
Register Description
RIR_LIMIT_CH{chan}[1] -> RIR_WAY_CH{chan}[7:6]
RIR_LIMIT_CH{chan}[2] -> RIR_WAY_CH{chan}[11:10]
RIR_LIMIT_CH{chan}[3] -> RIR_WAY_CH{chan}[15:14]
RIR_LIMIT_CH{chan}[4] -> RIR_WAY_CH{chan}[19:18]
RIR_LIMIT_CH{chan}[5] -> RIR_WAY_CH{chan}[23:22]
RIR_LIMIT_CH{chan}[6] -> RIR_WAY_CH{chan}[27:26]
RIR_LIMIT_CH{chan}[7] -> RIR_WAY_CH{chan}[31:28]
2.17.3 MC_RIR_WAY_CH1_0
MC_RIR_WAY_CH1_1
MC_RIR_WAY_CH1_2
MC_RIR_WAY_CH1_3
MC_RIR_WAY_CH1_4
MC_RIR_WAY_CH1_5
MC_RIR_WAY_CH1_6
MC_RIR_WAY_CH1_7
MC_RIR_WAY_CH1_8
MC_RIR_WAY_CH1_9
MC_RIR_WAY_CH1_10
MC_RIR_WAY_CH1_11
MC_RIR_WAY_CH1_12
MC_RIR_WAY_CH1_13
MC_RIR_WAY_CH1_14
MC_RIR_WAY_CH1_15
MC_RIR_WAY_CH1_16
MC_RIR_WAY_CH1_17
MC_RIR_WAY_CH1_18
MC_RIR_WAY_CH1_19
MC_RIR_WAY_CH1_20
MC_RIR_WAY_CH1_21
MC_RIR_WAY_CH1_22
MC_RIR_WAY_CH1_23
Device: 4
Function: 2
Offset: 80h, 84h, 88h, 8Ch, 90h, 94h, 98h, 9Ch, A0h, A4h, A8h, ACh, B0h, B4h, B8h, BCh, C0h,
C4h, C8h, CCh, D0h, D4h, D8h, DCh, E0h, E4h, E8h, ECh, F0h, F4h, F8h, FCh
Access as a Dword
Bit Type Reset
Value Description
13:4 RW 0 OFFSET. Defines the offset used in the rank interleave. This is a 2's
complement value.
3:0 RW 0 RANK. Defines which rank participates in WAY(n). If
MC_CONTROL.CLOSED_PAGE=1, this field defines the DRAM rank selected
when MemoryAddress[7:6]=(n). If MC_CONTROL.CLOSED_PAGE=0, this field
defines which rank is selected when MemoryAddress[13:12]=(n). (n) is the
instantiation of the register. This field is organized by physical rank. Bits [3:2]
are the encoded DIMM ID(slot). Bits [1:0] are the rank within that DIMM.
Register Description
116 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
MC_RIR_WAY_CH1_24
MC_RIR_WAY_CH1_25
MC_RIR_WAY_CH1_26
MC_RIR_WAY_CH1_27
MC_RIR_WAY_CH1_28
MC_RIR_WAY_CH1_29
MC_RIR_WAY_CH1_30
MC_RIR_WAY_CH1_31
Channel Rank Interleave Way Range Registers. These registers allow the user to define
the ranks and offsets that apply to the ranges defined by the LIMIT in the
MC_RIR_LIMIT_CH registers. The mappings are as follows:
RIR_LIMIT_CH{chan}[0] -> RIR_WAY_CH{chan}[3:0]
RIR_LIMIT_CH{chan}[1] -> RIR_WAY_CH{chan}[7:6]
RIR_LIMIT_CH{chan}[2] -> RIR_WAY_CH{chan}[11:10]
RIR_LIMIT_CH{chan}[3] -> RIR_WAY_CH{chan}[15:14]
RIR_LIMIT_CH{chan}[4] -> RIR_WAY_CH{chan}[19:18]
RIR_LIMIT_CH{chan}[5] -> RIR_WAY_CH{chan}[23:22]
RIR_LIMIT_CH{chan}[6] -> RIR_WAY_CH{chan}[27:26]
RIR_LIMIT_CH{chan}[7] -> RIR_WAY_CH{chan}[31:28]
Device: 5
Function: 2
Offset: 80h, 84h, 88h, 8Ch, 90h, 94h, 98h, 9Ch, A0h, A4h, A8h, ACh, B0h, B4h, B8h, BCh, C0h,
C4h, C8h, CCh, D0h, D4h, D8h, DCh, E0h, E4h, E8h, ECh, F0h, F4h, F8h, FCh
Access as a Dword
Bit Type Reset
Value Description
13:4 RW 0 OFFSET. Defines the offset used in the rank interleave. This is a 2's
complement value.
3:0 RW 0 RANK. Defines which rank participates in WAY(n). If
MC_CONTROL.CLOSED_PAGE=1, this field defines the DRAM rank selected
when MemoryAddress[7:6]=(n). If MC_CONTROL.CLOSED_PAGE=0, this field
defines which rank is selected when MemoryAddress[13:12]=(n). (n) is the
instantiation of the register. This field is organized by physical rank. Bits [3:2]
are the encoded DIMM ID(slot). Bits [1:0] are the rank within that DIMM.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 117
Register Description
2.17.4 MC_RIR_WAY_CH2_0
MC_RIR_WAY_CH2_1
MC_RIR_WAY_CH2_2
MC_RIR_WAY_CH2_3
MC_RIR_WAY_CH2_4
MC_RIR_WAY_CH2_5
MC_RIR_WAY_CH2_6
MC_RIR_WAY_CH2_7
MC_RIR_WAY_CH2_8
MC_RIR_WAY_CH2_9
MC_RIR_WAY_CH2_10
MC_RIR_WAY_CH2_11
MC_RIR_WAY_CH2_12
MC_RIR_WAY_CH2_13
MC_RIR_WAY_CH2_14
MC_RIR_WAY_CH2_15
MC_RIR_WAY_CH2_16
MC_RIR_WAY_CH2_17
MC_RIR_WAY_CH2_18
MC_RIR_WAY_CH2_19
MC_RIR_WAY_CH2_20
MC_RIR_WAY_CH2_21
MC_RIR_WAY_CH2_22
MC_RIR_WAY_CH2_23
MC_RIR_WAY_CH2_24
MC_RIR_WAY_CH2_25
MC_RIR_WAY_CH2_26
MC_RIR_WAY_CH2_27
MC_RIR_WAY_CH2_28
MC_RIR_WAY_CH2_29
MC_RIR_WAY_CH2_30
MC_RIR_WAY_CH2_31
Channel Rank Interleave Way Range Registers. These registers allow the user to define
the ranks and offsets that apply to the ranges defined by the LIMIT in the
MC_RIR_LIMIT_CH registers. The mappings are as follows:
RIR_LIMIT_CH{chan}[0] -> RIR_WAY_CH{chan}[3:0]
RIR_LIMIT_CH{chan}[1] -> RIR_WAY_CH{chan}[7:6]
RIR_LIMIT_CH{chan}[2] -> RIR_WAY_CH{chan}[11:10]
RIR_LIMIT_CH{chan}[3] -> RIR_WAY_CH{chan}[15:14]
RIR_LIMIT_CH{chan}[4] -> RIR_WAY_CH{chan}[19:18]
RIR_LIMIT_CH{chan}[5] -> RIR_WAY_CH{chan}[23:22]
RIR_LIMIT_CH{chan}[6] -> RIR_WAY_CH{chan}[27:26]
RIR_LIMIT_CH{chan}[7] -> RIR_WAY_CH{chan}[31:28]
Register Description
118 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.18 Memory Thermal Control
2.18.1 MC_THERMAL_CONTROL0
MC_THERMAL_CONTROL1
MC_THERMAL_CONTROL2
Controls for the Integrated Memory Controller thermal throttle logic for each channel.
Device: 6
Function: 2
Offset: 80h, 84h, 88h, 8Ch, 90h, 94h, 98h, 9Ch, A0h, A4h, A8h, ACh, B0h, B4h, B8h, BCh, C0h,
C4h, C8h, CCh, D0h, D4h, D8h, DCh, E0h, E4h, E8h, ECh, F0h, F4h, F8h, FCh
Access as a Dword
Bit Type Reset
Value Description
13:4 RW 0 OFFSET. Defines the offset used in the rank interleave. This is a 2's
complement value.
3:0 RW 0 RANK. Defines which rank participates in WAY(n). If
MC_CONTROL.CLOSED_PAGE=1, this field defines the DRAM rank selected
when MemoryAddress[7:6]=(n). If MC_CONTROL.CLOSED_PAGE=0, this field
defines which rank is selected when MemoryAddress[13:12]=(n). (n) is the
instantiation of the register. This field is organized by physical rank. Bits [3:2]
are the encoded DIMM ID(slot). Bits [1:0] are the rank within that DIMM.
Device: 4, 5, 6
Function: 3
Offset: 48h
Access as a Dword
Bit Type Reset
Value Description
2 RW 1 APPLY_SAFE. Enable the application of safe values while
MC_THERMAL_PARAMS_B.SAFE_INTERVAL is exceeded.
1:0 RW 0 THROTTLE_MODE. Selects throttling mode. When in lockstep mode, this field
should only be non-zero for Channel0.
0: Throttle disabled
1: Open Loop: Throttle when Virtual Temperature is greater than
MC_THROTTLE_OFFSET.
2: Closed Loop: Throttle when MC_CLOSED_LOOP.THROTTLE_NOW is set.
3: Closed Loop: Throttle when MC_DDR_THERM_COMMAND.THROTTLE is set
and the MC_DDR_THERM pin is asserted OR OLTT will be implemented
(Condition 1).
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 119
Register Description
2.18.2 MC_THERMAL_STATUS0
MC_THERMAL_STATUS1
MC_THERMAL_STATUS2
Status registers for the thermal throttling logic for each channel.
2.18.3 MC_THERMAL_DEFEATURE0
MC_THERMAL_DEFEATURE1
MC_THERMAL_DEFEATURE2
Thermal Throttle defeature register for each channel.
2.18.4 MC_THERMAL_PARAMS_A0
MC_THERMAL_PARAMS_A1
MC_THERMAL_PARAMS_A2
Parameters used by Open Loop Throughput Throttling (OLTT) and Closed Loop Thermal
Throttling (CLTT).
Device: 4, 5, 6
Function: 3
Offset: 4Ch
Access as a Dword
Bit Type Reset
Value Description
29:4 RO 0 CYCLES_THROTTLED. The number of throttle cycles, in increments of 256
Dclks, triggered in any rank in the last SAFE_INTERVAL number of ZQs.
3:0 RO 0 RANK_TEMP. The bit specifies whether the rank is above throttling threshold.
Device: 4, 5, 6
Function: 3
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
0 RW1S 0 THERM_REG_LOCK. When set, no further modification of all thermal throttle
registers are allowed. This bit must be set to the same value for all channels.
Device: 4, 5, 6
Function: 3
Offset: 60h
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 0 CKE_ASSERT_ENERGY. Energy of having CKE asserted when no command is
issued.
23:16 RW 0 CKE_DEASSERT_ENERGY. Energy of having CKE de-asserted when no
command is issued.
15:8 RW 0 WRCMD_ENERGY. Energy of a write including data transfer.
7:0 RW 0 RDCMD_ENERGY. Energy of a read including data transfer.
Register Description
120 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.18.5 MC_THERMAL_PARAMS_B0
MC_THERMAL_PARAMS_B1
MC_THERMAL_PARAMS_B2
Parameters used by the thermal throttling logic.
2.18.6 MC_COOLING_COEF0
MC_COOLING_COEF1
MC_COOLING_COEF2
Heat removed from DRAM 8 DCLKs. This should be scaled relative to the per command
weights and the initial value of the throttling threshold. This includes idle command and
refresh energies. If 2X refresh is supported, the worst case of 2X refresh must be
assumed.
When there are more than 4 ranks attached to the channel, the thermal throttle logic is
shared.
Device: 4, 5, 6
Function: 3
Offset: 64h
Access as a Dword
Bit Type Reset
Value Description
31:26 RW 1 SAFE_INTERVAL. Safe values for cooling coefficient and duty cycle will be
applied while the SAFE_INTERVAL is exceeded. This interval is the number of
ZQ intervals since the last time the MC_COOLING_COEF or MC_CLOSED_LOOP
registers have been written. A register to write to MC_COOLING_COEF or
MC_CLOSED_LOOP will re-apply the normal MC_COOLING_COEF and
MC_CLOSED_LOOP.MIN_THROTTLE_DUTY_CYC values. The register value
written need not be different; writing the current value will suffice. The
MC_THERMAL_STATUS.CYCLES_THROTTLED field is reloaded when the number
of ZQ intervals exceeds this value. This field must not be programmed to 0; this
value is illegal.
25:16 RW 255 SAFE_DUTY_CYC. This value replaces
MC_CLOSED_LOOP.MIN_THROTTLE_DUTY_CYC while the
MC_THERMAL_PARAMS_B.SAFE_INTERVAL is exceeded.
15:8 RW 1 SAFE_COOL_COEF. This value replaces MC_COOLING_COEF while the
THERMAL_PARAMS_B.SAFE_INTERVAL is exceeded.
7:0 RW 0 ACTCMD_ENERGY. Energy of an Activate/Precharge Cycle.
Device: 4, 5, 6
Function: 3
Offset: 80h
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 255 RANK3. Rank 3 Cooling Coefficient.
23:16 RW 255 RANK2. Rank 2 Cooling Coefficient.
15:8 RW 255 RANK1. Rank 1 Cooling Coefficient.
7:0 RW 255 RANK0. Rank 0 Cooling Coefficient.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 121
Register Description
2.18.7 MC_CLOSED_LOOP0
MC_CLOSED_LOOP1
MC_CLOSED_LOOP2
This register controls the closed loop thermal response of the DRAM thermal throttle
logic. It supports immediate thermal throttle and 2X refresh. In addition, the register is
used to configure the throttling duty cycle.
2.18.8 MC_THROTTLE_OFFSET0
MC_THROTTLE_OFFSET1
MC_THROTTLE_OFFSET2
Compared against bits [36:29] of virtual temperature of each rank stored in
RANK_VIRTUAL_TEMP to determine the throttle point. Recommended value for each
rank is 255.
When there are more than 4 ranks attached to the channel, the thermal throttle logic is
shared.
Device: 4, 5, 6
Function: 3
Offset: 84h
Access as a Dword
Bit Type Reset
Value Description
17:8 RW 64 MIN_THROTTLE_DUTY_CYC. This parameter represents the minimum
number of DCLKs of operation allowed after throttling. In order to provide
actual command opportunities, the number of clocks between CKE de-assertion
and first command should be considered. When in Lockstep, this field may not
be changed when throttling is possible. This includes THROTTLE_NOW or
DDR_THERM# pin assertion, depending on throttling mode selected.
4 RW 0 REF_2X_NOW. Direct control of dynamic 2X refresh if
MC_THERMAL_CONTROL.THROTTLE_MODE = 2. This bit can be set only when
MC_CHANNEL_X_REFRESH_THROTTLE_SUPPORT.ASR_PRESENT bit is set.
3:0 RW 0 THROTTLE_NOW. Throttler Vector to directly control throttling if
MC_THERMAL_CONTROL.THROTTLE_MODE = 2.
Device: 4, 5, 6
Function: 3
Offset: 88h
Access as a Dword
Bit Type Reset
Value Description
31:24 RW 0 RANK3. Rank 3 throttle offset.
23:16 RW 0 RANK2. Rank 2 throttle offset.
15:8 RW 0 RANK1. Rank 1 throttle offset.
7:0 RW 0 RANK0. Rank 0 throttle offset.
Register Description
122 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.18.9 MC_RANK_VIRTUAL_TEMP0
MC_RANK_VIRTUAL_TEMP1
MC_RANK_VIRTUAL_TEMP2
This register contains the 8 most significant bits [37:30] of the virtual temperature of
each rank. The difference between the virtual temperature and the sensor temperature
can be used to determine how fast fan speed should be increased. The value stored is
right shifted one bit to the right with respect to the corresponding MC_Throttle_Offset
register value. For example when When a rank throttle offset is set to 0x40, the value
read from the corresponding in MC_RANK_VIRTUAL_TEMP register is 0x20.
When there are more than 4 ranks attached to the channel, the thermal throttle logic is
shared.
2.18.10 MC_DDR_THERM_COMMAND0
MC_DDR_THERM_COMMAND1
MC_DDR_THERM_COMMAND2
This register contains the command portion of the DDR_THERM# functionality as
described in the Intel® Xeon® Processor 5500 Series Datasheet, Volume 1 (i.e. what
an assertion of the pin does).
Device: 4, 5, 6
Function: 3
Offset: 98h
Access as a Dword
Bit Type Reset
Value Description
31:24 RO 0 RANK3. Rank 3 virtual temperature.
23:16 RO 0 RANK2. Rank 2 virtual temperature.
15:8 RO 0 RANK1. Rank 1 virtual temperature.
7:0 RO 0 RANK0. Rank 0 virtual temperature.
Device: 4, 5, 6
Function: 3
Offset: 9Ch
Access as a Dword
Bit Type Reset
Value Description
3 RW 0 THROTTLE. Force throttling when DDR_THERM# pin is asserted.
2 RW 0 RSVD.
1 RW 0 DISABLE_EXTTS. Response to DDR_THERM# pin is disabled. ASSERTION and
DEASSERTION fields in the register MC_DDR_THERM_STATUS are frozen.
0 RW1S 0 LOCK. When set, all bits in this register are RO and cannot be written. Reset
will clear the lock.
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 123
Register Description
2.18.11 MC_DDR_THERM_STATUS0
MC_DDR_THERM_STATUS1
MC_DDR_THERM_STATUS2
This register contains the status portion of the DDR_THERM# functionality as described
in the Intel® Xeon® Processor 5500 Series Datasheet, Volume 1 (i.e. what is
happening or has happened with respect to the pin).
2.19 Integrated Memory Controller Miscellaneous
Registers
2.19.1 MC_DIMM_CLK_RATIO_STATUS
Contains status information about DIMM clock ratio.
Device: 4, 5, 6
Function: 3
Offset: A4h
Access as a Dword
Bit Type Reset
Value Description
2 RO 0 ASSERTION. An assertion edge was seen on DDR_THERM#. Write-1-to-clear.
1 RO 0 DEASSERTION. A de-assertion edge was seen on DDR_THERM#. Write-1-to-
clear.
0 RO 0 STATE. Present logical state of DDR_THERM# bit. This is a static indication of
the pin, and may be several clocks out of date due to the delay between the pin
and the signal.
STATE = 0 means DDR_THERM# is deasserted
STATE = 1 means DDR_THERM# is asserted
Device: 3
Function: 4
Offset: 50h
Access as a Dword
Bit Type Reset
Value Description
28:24 RO 0 MAX_RATIO. Maximum ratio allowed by the part.
Value - Qclk
00000 - RSVD
00110 - 800Mhz
01000 - 1066Mhz
01010 - 1333Mhz
4:0 RO 0 QCLK_RATIO. Current ratio of Qclk.
Value - Qclk.
00000 - RSVD
00110 - 800Mhz
01000 - 1066Mhz
01010 - 1333Mhz
Register Description
124 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
2.19.2 MC_DIMM_CLK_RATIO
Requested DIMM clock ratio (Qclk). This is the data rate going to the dimm. The clock
sent to the DIMM is 1/2 of QCLK rate.
§
Device: 3
Function: 4
Offset: 54h
Access as a Dword
Bit Type Reset
Value Description
4:0 RW 6 QCLK_RATIO. Requested ratio of Qclk/Bclk.
00000 - RSVD
00110 - 800Mhz
01000 - 1066Mhz
01010 - 1333Mhz
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 125
DIMM Population Requirements
3DIMM Population Requirements
3.1 General Population Requirements
The Intel® 5500 platform offers a wide variety of DIMM configurations. Key parameters
used in defining various DIMM configurations are listed in Table 3-1.
Following are generic population requirements:
• All DIMMs must be DDR3 DIMMs.
• The Intel® Xeon® processor 5500 series does not support low voltage (1.35V)
DDR3 memory. If 1.35V (DDR3L) and 1.50V (DDR3) DIMMs are mixed, the DIMMs
will run at 1.50V.
• Registered DIMMs must be ECC only, Unbuffered DIMMs can be ECC or non-ECC.
• Mixing of Registered and Unbuffered DIMMs is not allowed.
• Mixing of MetaSDRAM* R-DIMM with any other DIMM type is not allowed.
• It is allowed to mix ECC and non-ECC Unbuffered DIMMs. The presence of a single
non-ECC Unbuffered DIMM will result in disabling ECC functionality.
• DIMMs with different timing parameters can be installed on different slots within
the same channel, but only timings that support the slowest DIMM will be applied
to all. As a consequence, faster DIMMs will be operated at timings supported by the
slowest DIMM populated. The same interface frequency (DDR3-800, DDR3-1066,
or DDR3-1333) will be applied to all DIMMs on all channels on the platform (both
processors).
• DIMMs with DDR3-1333 speed are allowed only when one DIMM Per Channel
(1DPC) is populated. If two 1333 MT/s capable UDIMMs or RDIMMs are detected in
the same channel, BIOS would flag this as a warning and force the speed to
1066 MT/s.
• DIMMs with DDR3-1066 speed are allowed only when two DIMMs Per Channel
(2DPC) are populated. If three 1066 MT/s capable UDIMMs or RDIMMs are detected
in the same channel, BIOS will force the speed to 800 MT/s.
Table 3-1. Key Parameters for DIMM Configurations
Parameter Possible Values
# of Channels 1, 2, or 3
# of DIMM Slots per channel Two DIMM slots or Three DIMM slots
# of DIMMs Populated per channel 1DPC, 2DPC, or 3DPC (required three DIMM slots per channel)
DIMM Type RDIMM (w/ECC), UDIMM (w/ or w/o ECC)
MetaSDRAM* R-DIMM (8 GB module only)
DIMM Raw Cards RDIMM Raw Cards as defined by JEDEC:
A(1Rx8), B (2Rx8), C (1Rx4), D (2Rx4), E/J (2Rx4), F (4Rx4), or H
(4Rx8)
UDIMM Raw Cards as defined by JEDEC:
A (1Rx8), B (2Rx8), C (1Rx161), D (1Rx8 w/ECC), E (2Rx8 w/ECC)
Notes:
1. UDIMM Raw Card C(1Rx16) is not supported in RDIMM/UDIMM combo designs (a combo platform can support
either RDIMM only or UDIMM only but not a mix of both types).
DIMM Frequencies DDR3-800, DDR3-1066, or DDR3-1333
DIMM Population Requirements
126 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
• When one quad rank DIMMs is used, it must be populated in DIMM slot0 (farthest
away from the CPU) of a given channel
• Mixing of quad ranks DIMMs (RDIMM Raw Cards F and H) in one channel and three
DIMMs in other channel (3DPC) on the same CPU socket is not allowed. If such
configuration is detected on a CPU socket, BIOS would flag this as a warning and
disable the QR DIMM channel(s).
3.2 Populating DIMMs Within a Channel
3.2.1 DIMM Population for Three Slots per Channel
For three slot per channel configurations, the Intel 5500 platform requires DIMMs
within a channel to be populated starting with the DIMMs farthest from the processor in
a “fill-farthest” approach (see Figure 3-1). In addition, when populating a Quad-rank
DIMM with a Single- or Dual-rank DIMM in the same channel, the Quad-rank DIMM
must be populated farthest from the processor. Note that Quad-rank DIMMs and
UDIMMs are not allowed in three slots populated configurations. Intel recommends
checking for correct DIMM placement during BIOS initialization. Additionally, Intel
strongly recommends that all designs follow the DIMM ordering, command clock, and
control signal routing documented in Figure 3-1. This addressing must be maintained
to be compliant with the reference BIOS code supplied by Intel. All allowed DIMM
population configurations for three slots per channel are shown in Table 3-2 and
Table 3-3.
Note: ODT[5:4] is muxed with CS[7:6]#.
Figure 3-1. DIMM Population within a Channel for Three Slots per Channel
CLK:
Processor
D
I
M
M
1
4/5/6/7
2/3
D
I
M
M
2
P2/N2
2/3
4/5
Fill
Second Fill
First
Chip Select:
ODT:
P1/N1
D
I
M
M
0
Fill
Third
0/1/2/3
0/1
P0/N0
1/30/2CKE: 0/2
P3/N3 P2/N2
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 127
DIMM Population Requirements
Table 3-2. RDIMM Population Configurations within a Channel for Three Slots
per Channel
Configuration
Number Maximum Supported
Speed1
Notes:
1. If a DIMM faster than the maximum supported speed is populated, BIOS will force the memory to run at the
maximum supported speed.
1N or 2N DIMM2 DIMM1 DIMM0
1 DDR3-1333 1N Empty Empty Single-rank
2 DDR3-1333 1N Empty Empty Dual-rank
3 DDR3-1066 1N Empty Empty Quad-rank
4 DDR3-1066 1N Empty Single-rank Single-rank
5 DDR3-1066 1N Empty Single-rank Dual-rank
6 DDR3-1066 1N Empty Dual-rank Single-rank
7 DDR3-1066 1N Empty Dual-rank Dual-rank
8 DDR3-800 1N Empty Single-rank Quad-rank
9 DDR3-800 1N Empty Dual-rank Quad-rank
10 DDR3-800 1N Empty Quad-rank Quad-rank
11 DDR3-800 1N Single-rank Single-rank Single-rank
12 DDR3-800 1N Single-rank Single-rank Dual-rank
13 DDR3-800 1N Single-rank Dual-rank Single-rank
14 DDR3-800 1N Dual-rank Single-rank Single-rank
15 DDR3-800 1N Single-rank Dual-rank Dual-rank
16 DDR3-800 1N Dual-rank Single-rank Dual-rank
17 DDR3-800 1N Dual-rank Dual-rank Single-rank
18 DDR3-800 1N Dual-rank Dual-rank Dual-rank
Table 3-3. UDIMM Population Configurations within a Channel for Three Slots
per Channel
Configuration
Number Maximum Supported
Speed1
Notes:
1. If a DIMM faster than the maximum supported speed is populated, BIOS will force the memory to run at the
maximum supported speed.
1N or 2N DIMM2 DIMM1 DIMM0
1 DDR3-1333 1N Empty Empty Single-rank
2 DDR3-1333 1N Empty Empty Dual-rank
3 DDR3-1066 2N Empty Single-rank Single-rank
4 DDR3-1066 2N Empty Single-rank Dual-rank
5 DDR3-1066 2N Empty Dual-rank Single-rank
6 DDR3-1066 2N Empty Dual-rank Dual-rank
DIMM Population Requirements
128 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
3.2.2 DIMM Population for Two Slots per Channel
For two slot per channel configurations, the Intel 5500 platform requires DIMMs within
a channel to be populated starting with the DIMMs farthest from the processor in a “fill-
farthest” approach (see Figure 3-2). In addition, when populating a Quad-rank DIMM
with a Single- or Dual-rank DIMM in the same channel, the Quad-rank DIMM must be
populated farthest from the processor. Intel recommends checking for correct DIMM
placement during BIOS initialization. Additionally, Intel strongly recommends that all
designs follow the DIMM ordering, command clock, and control signal routing
documented in Figure 3-2. This addressing must be maintained to be compliant with
the reference BIOS code supplied by Intel. All allowed DIMM population configurations
for two slots per channel are shown in Table 3-5 and Table 3-6.
Table 3-4. MetaSDRAM* R-DIMM1 Population Configurations within a Channel for
Three Slots per Channel
Notes:
1. 8 GB DDR3 MetaSDRAM R-DIMM only. Designers considering the support of MetaSDRAM R-DIMM are
recommended to review the platform VR design guidelines as the DC/AC load requirement may be different
from that of RDIMM/UDIMM.
Configuration
Number Maximum Supported
Speed2
2. If a DIMM faster than the maximum supported speed is populated, BIOS will force the memory to run at the
maximum supported speed.
1N or 2N DIMM2 DIMM1 DIMM0
1 DDR3-1066 1N Empty Empty Dual-rank
2 DDR3-1066 1N Empty Dual-rank Dual-rank
3 DDR3-1066 1N Dual-rank Dual-rank Dual-rank
Figure 3-2. DIMM Population Within a Channel for Two Slots per Channel
CLK:
Processor
D
I
M
M
0
0/1/2/3
0/1
D
I
M
M
1
P1/N1
4/5/6/7
2/3
Chip Select:
ODT:
P0/N0
0/21/3CKE:
Fill
Second Fill
First
P3/N3 P2/N2
Intel® Xeon® Processor 5500 Series Datasheet, Volume 2 129
DIMM Population Requirements
§
Table 3-5. RDIMM Population Configurations Within a Channel for
Two Slots per Channel
Configuration
Number Maximum Supported
Speed1
Notes:
1. If a DIMM faster than the maximum supported speed is populated, BIOS will force the memory to run at the
maximum supported speed.
1N or 2N DIMM1 DIMM0
1 DDR3-1333 1N Empty Single-rank
2 DDR3-1333 1N Empty Dual-rank
3 DDR3-1066 1N Empty Quad-rank
4 DDR3-1066 1N Single-rank Single-rank
5 DDR3-1066 1N Single-rank Dual-rank
6 DDR3-1066 1N Dual-rank Single-rank
7 DDR3-1066 1N Dual-rank Dual-rank
8 DDR3-800 1N Single-rank Quad-rank
9 DDR3-800 1N Dual-rank Quad-rank
10 DDR3-800 1N Quad-rank Quad-rank
Table 3-6. UDIMM Population Configurations within a Channel for Two Slots per Channel
Configuration
Number Maximum Supported Speed1
Notes:
1. If a DIMM faster than the maximum supported speed is populated, BIOS will force the memory to run at the
maximum supported speed.
1N or 2N DIMM1 DIMM0
1 DDR3-1333 1N Empty Single-rank
2 DDR3-1333 1N Empty Dual-rank
3 DDR3-1066 2N Single-rank Single-rank
4 DDR3-1066 2N Single-rank Dual-rank
5 DDR3-1066 2N Dual-rank Single-rank
6 DDR3-1066 2N Dual-rank Dual-rank
Table 3-7. MetaSDRAM R-DIMM1 Population Configurations within a Channel for
Two Slots per Channel
Notes:
1. 8 GB DDR3 MetaSDRAM R-DIMM only.
Configuration
Number Maximum Supported Speed2
2. If a DIMM faster than the maximum supported speed is populated, BIOS will force the memory to run at the
maximum supported speed.
1N or 2N DIMM1 DIMM0
1 DDR3-1066 1N Empty Dual-rank
2 DDR3-1066 1N Dual-rank Dual-rank
DIMM Population Requirements
130 Intel® Xeon® Processor 5500 Series Datasheet, Volume 2
