Datasheet

Datasheet, Volume 2 197
Processor Configuration Registers
60:59 RO 0h
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
the CAIG 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.
58:34 RO 00..00b Reserved
33:32 W 0h
Function Mask (FM)
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 device(s)
specified through the FM and SID fields must correspond to the domain-
id specified in the DID field. Value returned on read of this field is
undefined.
31:16 W 0000h
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.
Value returned on read of this field is undefined.
15:0 RW 0000h
Domain-ID (DID)
This field indicates the ID of the domain whose context-entries needs 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.
B/D/F/Type: 0/0/0/VC0PREMAP
Address Offset: 28–2Fh
Reset Value: 0000000000000000h
Access: W, RW, RO
Bit Attr
Reset
Value
Description