Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - DATASHEET VOLUME 2 01-2011 Datasheet page 228

B/D/F/Type:
Address Offset:
Reset Value:
Access:
Size:
BIOS Optimal Default
Bit
60:59
58:34
33:32
31:16
15:8
7:0
228
0/0/0/GFXVTBAR
28–2Fh
0800000000000000h
RW, RW-V, RO-V
64 bits
000000000h
Reset RST/
Attr
Value PWR
RO-V 1h Uncore
RO 0h
RW 0h Uncore
RW 0000h Uncore
RO 0h
RW 00h Uncore
Processor Configuration Registers
Description
Context Actual Invalidation Granularity (CAIG)
Hardware reports the granularity at which an invalidation request
was processed through the CAIG field at the time of reporting
invalidation completion (by clearing the ICC field).
The following are the encodings for this field:
00 = Reserved.
01 = Global Invalidation performed. This could be in response to
a global, domain-selective or device-selective invalidation
request.
10 = Domain-selective invalidation performed using the domain-
id specified by software in the DID field. This could be in
response to a domain-selective or device-selective
invalidation request.
11 = Device-selective invalidation performed using the source-id
and domain-id specified by software in the SID and FM
fields. This can only be in response to a device-selective
invalidation request.
Reserved
Function Mask (FM)
Software may use the Function Mask to perform device-selective
invalidations on behalf of devices supporting PCI Express Phantom
Functions.
This field specifies which bits of the function number portion (least
significant three bits) of the SID field to mask when performing
device-selective invalidations. The following encodings are defined
for this field:
00 = No bits in the SID field masked.
01 = Mask most significant bit of function number in the SID field.
10 = Mask two most significant bit of function number in the SID
field.
11 = Mask all three bits of function number in the SID field.
The context-entries corresponding to all the source-ids specified
through the FM and SID fields must have to the domain-id
specified in the DID field.
Source ID (SID)
This field indicates the source-id of the device whose
corresponding context-entry needs to be selectively invalidated.
This field along with the FM field must be programmed by software
for device-selective invalidation requests.
Reserved
Domain-ID (DID)
this field indicates the id of the domain whose context-entries need
to be selectively invalidated. This field must be programmed by
software for both domain-selective and device-selective
invalidation requests.
The Capability register reports the domain-id width supported by
hardware. Software must ensure that the value written to this field
is within this limit. Hardware may ignore and not implement bits
15:N, where N is the supported domain-id width reported in the
Capability register.
Datasheet, Volume 2