AC82G41SLGQ3 Datasheet, PDF (522/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Intel^® Virtualization Technology for Directed I/O Registers (D0:F0) (Intel^® 82Q45 GMCH Only)
12.3.21 FRCD_REG—Fault Recording Registers
B/D/F/Type:
Address Offset:
Default Value:
Access:
Size:
0/2/0/GFXVTBAR
200-20Fh
00000000000000100000000000000000h
RO/P, RO, R/WC/P
128 bits
This register is used to record DMA-remapping fault information when primary fault
logging is active. Hardware reports the number and location of fault recording registers
through the Capability register. This register is relevant only for primary fault logging.
These registers are sticky and can be cleared only through powergood reset or via
software clearing the RW1C fields by writing a 1.
Bit
Access
127
R/WC/P
126
RO/P
125:124
RO
123:104
103:96
95:80
79:64
RO
RO/P
RO
RO/P
Default
Value
0
0
00b
0s
0s
0s
0010h
RST/PWR
Description
Core
Core
Core
Core
Core
Core
Core
Fault (F): Hardware sets this field to indicate a fault is
logged in this Fault Recording register. The F field is Set by
hardware after the details of the fault is recorded in other
fields.
When this field is set, hardware may collapse additional
faults from the same source-ID (SID).
Software writes the value read from this field to Clear it.
Type (T): Type of the faulted DMA request
0 = DMA write
1 = DMA read request
This field is relevant only when the F field is set.
Address Type (AT): This field captures the AT field from
the faulted DMA request.
Hardware implementations not supporting Device-IOTLBs
(DI field Clear in Extended Capability register) treat this
field as Reserved.
When supported, this field is valid only when the F field is
set, and when the fault reason (FR) indicates one of the
DMA-remapping fault conditions.
NOTE: This field is reserved as this feature is not
supported.
Reserved
Fault Reason (FR): Reason for the fault.
This field is relevant only when the F field is set.
Reserved
Source Identifier (SID): Requester-ID of the faulted
DMA request.
This field is relevant only when the F field is set.
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Datasheet