Intel B940 Datasheet Page 201

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Datasheet, Volume 2 201
Processor Configuration Registers
2.15.13 AFLOG_REG—Advanced Fault Log Register
This register specifies the base address of memory-resident fault-log region.
This register is treated as read-only (0) for implementations not supporting advanced
translation fault logging (AFL field reported as 0 in the Capability register).
This register is sticky and can be cleared only through a powergood reset or using
software clearing the RW1C fields by writing a 1.
B/D/F/Type: 0/0/0/VC0PREMAP
Address Offset: 58–5Fh
Reset Value: 0000000000000000h
Access: RO
Bit Attr
Reset
Value
Description
63:12 RO
00000000
00000h
Fault Log Address (FLA)
This field specifies the base of size-aligned fault-log region in system
memory. Hardware may ignore and not implement bits 63:HAW, where HAW
is the host address width.
Software specifies the base address and size of the fault log region through
this register, and programs it in hardware through the SFL field in the Global
Command register. When implemented, reads of this field returns value that
was last programmed to it.
11:9 RO 0h
Fault Log Size (FLS)
This field specifies the size of the fault log region pointed by the FLA field.
The size of the fault log region is 2X * 4KB, where X is the value programmed
in this register. When implemented, reads of this field returns value that was
last programmed to it.
8:2 RO 00h Reserved
1RO 0h
Advanced Pending Fault (APF)
When this field is clear, hardware sets this field When the first fault record (at
index 0) is written to a fault log. At this time, a fault event is generated
based on the programming of the Fault Event Control register. Software
writing 1 to this field clears it.
0RO 0h
Advanced Fault Overflow (AFO)
Hardware sets this field to indicate advanced fault log overflow condition.
Software writing 1 to this field clears it.
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