Intel B940 Datasheet Page 349

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Datasheet, Volume 2 349
Intel
®
QuickPath Architecture System Address Decode Register Description
3.5 Generic Non-core Registers
3.5.1 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 that these values reset to 2, and need to be increased by
BIOS to whatever the home agents can support.
3.6 SAD—System Address Decoder Registers
3.6.1 SAD_PAM0123
This register is for legacy Device 0, Function 0 90h–93h address space.
Device: 0
Function: 0
Offset: 60h
Access as a Dword
Bit Type
Reset
Value
Description
31:22 RV 000h Reserved
21:16 RW 2
LOCAL_MC
Maximum number of RTIDs for the local home agent.
15:14 RV 00b Reserved
13:8 RW 2h
SIBLING
Maximum number of RTIDs for the sibling home agent.
7:6 RV 00b Reserved
5:0 RW 2h
CHIPSET
Maximum number of RTIDs for the IOH home agent.
Device: 0
Function: 1
Offset: 40h
Access as a Dword
Bit Type
Reset
Value
Description
31:30 RV 0 Reserved
29:28 RW 0
PAM3_HIENABLE. 0D4000h–0D7FFFh Attribute (HIENABLE)
This field controls the steering of read and write cycles that address the BIOS
area from 0D4000h to 0D7FFFh.
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.
27:26 RV 0 Reserved
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