Datasheet

Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family 93
Datasheet Volume Two: Functional Description, February 2014
Processor Uncore Configuration Registers
13.2.1.3 TADWAYNESS_[0:11]
TAD Range Wayness, Limit and Target.
There are total of 12 TAD ranges (N + P + 1 = number of TAD ranges; P = how many
times channel interleave changes within the SAD ranges.).
Note for mirroring configuration:
For 1-way interleave, channel 0-2 mirror pair: target list = <0,2,x,x>,
TAD ways = “00”
11:10 RW_LB 0x0
CPGC_IOSAV (trng_mode):
00: IOSAV mode
01: CPGC Mode- Setting to be used post VMSE CMD training (including EV)
10: CPGC VMSE CMD training mode - Set until VMSE CMD (coarse/fine) bus
is trained
11: Normal Mode
Converged Pattern Generation and Checking (CPGC) is described in the
System Agent BIOS specification.
9:9 RV -
Reserved2:
Reserved.
8:8 RW_LB 0x0
NORMAL (normal):
0: Training mode
1: Normal Mode
7:4 RV -
Reserved1:
Reserved.
3:3 RW_LBV 0x0
DIR_EN (dir_en):
Should always be set with VMSE. It is important to know that changing this
bit will require BIOS to reinitialize the memory.
2:2 RW_LBV 0x0
ECC_EN (ecc_en):
ECC enable.
Note: This bit may be overridden to 0 when disable ECC via fuse.
1:1 RW_LBV 0x0
LS_EN (ls_en):
Use lock-step channel mode if set; otherwise, independent channel mode.
This field should only be set for native ddr3 lockstep.
VMSE Lockstep 1:1 mode should always set this bit to 0
Note: This bit will only work if the SKU is enabled for this feature.
0:0 RW_LB 0x0
CLOSE_PG (close_pg):
Use close page address mapping if set; otherwise, open page.
Type: CFG PortID: N/A
Bus: 1 Device: 15 Function: 0
Bus: 1 Device: 29 Function: 0
Offset: 0x7c
Bit Attr Default Description