CP80617004119AES LBU3 Intel, CP80617004119AES LBU3 Datasheet - Page 315
CP80617004119AES LBU3
Manufacturer Part Number
CP80617004119AES LBU3
Description
Manufacturer
Intel
Datasheet
1.CP80617004119AES_LBU3.pdf
(388 pages)
Specifications of CP80617004119AES LBU3
Lead Free Status / RoHS Status
Compliant
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Processor Configuration Registers
1.19.7
Datasheet
CCMD_REG - Context Command Register
B/D/F/Type:
Address Offset:
Default Value:
Access:
Size:
Register to manage context cache. The act of writing the uppermost byte of the
CCMD_REG with ICC field set causes the hardware to perform the context-cache
invalidation.
Bit
63
Access
RW-SC
Default
Value
0b
Invalidate Context-Cache (ICC)
Software requests invalidation of context-cache by setting
this field. Software must also set the requested invalidation
granularity by programming the CIRG field.
Software must read back and check the ICC field to be clear
to confirm the invalidation is complete. Software must not
update this register when this field is set.
Hardware clears the ICC field to indicate the invalidation
request is complete. Hardware also indicates the granularity
at which the invalidation operation was performed through
the CAIG field. Software must not submit another
invalidation request through this register while the ICC field
is set.
Software must submit a context cache invalidation request
through this field only when there are no invalidation
requests pending at this DMA-remapping hardware unit.
Refer to Intel VT-d specification Section 11 for software
programming requirements.
Since information from the context-cache may be used by
hardware to tag IOTLB entries, software must perform
domain-selective (or global) invalidation of IOTLB after the
context cache invalidation has completed.
Hardware implementations reporting write-buffer flushing
requirement (RWBF=1 in Capability register) must implicitly
perform a write buffer flush before invalidating the context-
cache.
Refer to Intel VT-d specification Section 11.1 for write buffer
flushing requirements.
0/0/0/DMIVC1REMAP
28-2Fh
0000000000000000h
RW-SC; RW; RO; W
64 bits
(Sheet 1 of 3)
Description
315
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