Intel B940 Datasheet Page 220

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Processor Configuration Registers
220 Datasheet, Volume 2
12 RW-L 0b
PEG1 L3 TLBR (PEG1L3TLBR)
This is a TLBR policy bit for PEG1VC0 L3 Cache
11 RW-L 0b
PEG1 TLB Disable (PEG1TLBDIS)
1 = PEG1VC0 TLBs are disabled and each GPA request will result in a miss
and a root walk will be requested from VTd Dispatcher
0 = Normal mode (default), PEG1VC0 TLBs are enabled and normal hit/miss
flows are followed
10 RW-L 0b
DMIVC0TLBDisable (DMIVC0 TLB Disable)
1 = DMIVC0P TLBs are disabled and each GPA request will result in a miss
and a root walk will be requested from VTd Dispatcher
0 = Normal mode (default), DMIVC0P TLBs are enabled and normal hit/miss
flows are followed
9RW-L 0b
PEG TLB Disable (PEGTLBDIS)
1 = PEGVC0 TLBs are disabled and each GPA request will result in a miss
and a root walk will be requested from VTd Dispatcher
0 = Normal mode (default), PEGVC0 TLBs are enabled and normal hit/miss
flows are followed
8RW-L 0b
PEG Context Cache TLBR (PEGCTXTTLBR)
This is a TLBR policy bit for PEGVC0 Context Cache
7RW-L 0b
PEG L1 TLBR (PEGL1TLBR)
This is a TLBR policy bit for PEGVC0 L1 Cache
6RW-L 0b
PEG L3 TLBR (PEGL3TLBR)
This is a TLBR policy bit for PEGVC0 L3 Cache
5RW-L 0b
DMI Context Cache TLBR (DMICTXTTLBR)
This is a TLBR policy bit for DMIVC0p Context Cache.
4RW-L 0b
DMI L1 TLBR (DMIL1TLBR)
This is a TLBR policy bit for DMIVC0p L1 Cache.
3RW-L 0b
DMI L3 TLBR (DMIL3TLBR)
This is a TLBR policy bit for DMIVC0p L3 Cache.
2RW-L 0b
Maximum Guest Physical Address Mode (GPAMODE)
Maximum Guest Physical Address Mode. This bit is static and will be modified
by BIOS only.
1 = 48 bit AGAW mode
0 = 39 bit AGAW mode
1RW-L 0b
Global IOTLB Invalidation Promotion (GLBIOTLBINV)
This bit controls the IOTLB Invalidation behavior of the DMA remap engine.
When this bit is set, any type of IOTLB Invalidation (valid or invalid) will be
promoted to Global IOTLB Invalidation.
0RW-L 0b
Global Context Invalidation Promotion (GLBCTXTINV)
This bit controls the Context Invalidation behavior of the DMA remap engine.
When this bit is set, any type of Context Invalidation (valid or invalid) will be
promoted to Global Context Invalidation.
B/D/F/Type: 0/0/0/VC0PREMAP
Address Offset: FFC–FFFh
Reset Value: 00000000h
Access: RW-L
Bit Attr
Reset
Value
Description
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