Datasheet

Processor Configuration Registers
268 Datasheet, Volume 2
7RO 0bUncore
Caching Mode (CM)
0 = Not-present and erroneous entries are Not cached in any of
the remapping caches. Invalidations are not required for
modifications to individual not present or invalid entries.
However, any modifications that result in decreasing the
effective permissions or partial permission increases require
invalidations for them to be effective.
1 = Not-present and erroneous mappings may be cached in the
remapping caches. Any software updates to the remapping
structures (including updates to "not-present" or erroneous
entries) require explicit invalidation.
Hardware implementations of this architecture must support a
value of 0 in this field.
6RO 1bUncore
Protected High-Memory Region (PHMR)
0 = Indicates protected high-memory region is not supported.
1 = Indicates protected high-memory region is supported.
5RO 1bUncore
Protected Low-Memory Region (PLMR)
0 = Indicates protected low-memory region is not supported.
1 = Indicates protected low-memory region is supported.
4RO 0bUncore
Required Write-Buffer Flushing (RWBF)
0 = No write-buffer flushing is needed to ensure changes to
memory-resident structures are visible to hardware.
1 = Software must explicitly flush the write buffers to ensure
updates made to memory-resident remapping structures are
visible to hardware.
3RO 0bUncore
Advanced Fault Logging (AFL)
0 = Advanced fault logging is not supported. Only primary fault
logging is supported.
1 = Advanced fault logging is supported.
2:0 RO 010b Uncore
Number of domains supported (ND)
000 = Hardware supports 4-bit domain-ids with support for up to
16 domains.
001 = Hardware supports 6-bit domain-ids with support for up to
64 domains.
010 = Hardware supports 8-bit domain-ids with support for up to
256 domains.
011 = Hardware supports 10-bit domain-ids with support for up to
1024 domains.
100 = Hardware supports 12-bit domain-ids with support for up to
4K domains.
100 = Hardware supports 14-bit domain-ids with support for up to
16K domains.
110 = Hardware supports 16-bit domain-ids with support for up to
64K domains.
111 = Reserved.
B/D/F/Type: 0/0/0/VC0PREMAP
Address Offset: 8–Fh
Reset Value: 00C9_0080_2066_0262h
Access: RO
Size: 64 bits
BIOS Optimal Default 000h
Bit Attr
Reset
Value
RST/
PWR
Description