Vol. 3C 35-283
MODEL-SPECIFIC REGISTERS (MSRS)
185H
389
MSR_MCG_RDI
0, 1, 2, 3,
4, 6
Unique
Machine Check EDI/RDI Save State
See Section 15.3.2.6, “IA32_MCG Extended
63:0
Contains register state at time of machine check
error. When in non-64-bit modes at the time of
the error, bits 63-32 do not contain valid data.
186H
390
MSR_MCG_RBP
0, 1, 2, 3,
4, 6
Unique
Machine Check EBP/RBP Save State
See Section 15.3.2.6, “IA32_MCG Extended
63:0
Contains register state at time of machine check
error. When in non-64-bit modes at the time of
the error, bits 63-32 do not contain valid data.
187H
391
MSR_MCG_RSP
0, 1, 2, 3,
4, 6
Unique
Machine Check ESP/RSP Save State
See Section 15.3.2.6, “IA32_MCG Extended
63:0
Contains register state at time of machine check
error. When in non-64-bit modes at the time of
the error, bits 63-32 do not contain valid data.
188H
392
MSR_MCG_RFLAGS
0, 1, 2, 3,
4, 6
Unique
Machine Check EFLAGS/RFLAG Save State
See Section 15.3.2.6, “IA32_MCG Extended
63:0
Contains register state at time of machine check
error. When in non-64-bit modes at the time of
the error, bits 63-32 do not contain valid data.
189H
393
MSR_MCG_RIP
0, 1, 2, 3,
4, 6
Unique
Machine Check EIP/RIP Save State
See Section 15.3.2.6, “IA32_MCG Extended
63:0
Contains register state at time of machine check
error. When in non-64-bit modes at the time of
the error, bits 63-32 do not contain valid data.
18AH
394
MSR_MCG_MISC
0, 1, 2, 3,
4, 6
Unique
Machine Check Miscellaneous
See Section 15.3.2.6, “IA32_MCG Extended
0
DS
When set, the bit indicates that a page assist or
page fault occurred during DS normal operation.
The processors response is to shut down.
The bit is used as an aid for debugging DS
handling code. It is the responsibility of the user
(BIOS or operating system) to clear this bit for
normal operation.
63:1
Reserved.
18BH -
18FH
395
MSR_MCG_RESERVED1 -
MSR_MCG_RESERVED5
Reserved.
Table 35-41. MSRs in the Pentium® 4 and Intel® Xeon® Processors (Contd.)
Register
Address
Register Name
Fields and Flags
Model
Avail-
ability
Shared/
Unique
1
Bit Description
Hex
Dec