Intel IA-32 Manuale Utente
14-2 Vol. 3A
MACHINE-CHECK ARCHITECTURE
14.3
MACHINE-CHECK MSRS
Machine check MSRs in the Pentium 4, Intel Xeon, and P6 family processors consist of a set of
global control and status registers and several error-reporting register banks (see Figure 14-1).
Each error-reporting bank is associated with a specific hardware unit (or group of hardware
units) in the processor. Use RDMSR and WRMSR to read and to write these registers.
global control and status registers and several error-reporting register banks (see Figure 14-1).
Each error-reporting bank is associated with a specific hardware unit (or group of hardware
units) in the processor. Use RDMSR and WRMSR to read and to write these registers.
14.3.1
Machine-Check Global Control MSRs
The machine-check global control MSRs include the IA32_MCG_CAP, IA32_MCG_STATUS,
and IA32_MCG_CTL. See Appendix B, “Model-Specific Registers (MSRs),” for the addresses
of these registers.
and IA32_MCG_CTL. See Appendix B, “Model-Specific Registers (MSRs),” for the addresses
of these registers.
The structure of the IA32_MCG_CAP is implemented differently in Pentium 4 and Intel Xeon
processors and in P6 family processors. Also, note that the register names used for P6 family
processors do not have the ‘IA32’ prefix.
processors and in P6 family processors. Also, note that the register names used for P6 family
processors do not have the ‘IA32’ prefix.
14.3.1.1
IA32_MCG_CAP MSR (Pentium 4 and Intel Xeon Processors)
The IA32_MCG_CAP MSR is a read-only register that provides information about the
machine-check architecture implementation in Pentium 4 and Intel Xeon processors (see
Figure 14-2).
machine-check architecture implementation in Pentium 4 and Intel Xeon processors (see
Figure 14-2).
Figure 14-1. Machine-Check MSRs
0
63
0
63
IA32_MCG_CAP MSR
IA32_MCG_STATUS MSR
Error-Reporting Bank Registers
0
63
0
63
IA32_MCi_CTL MSR
IA32_MCi_STATUS MSR
0
63
0
63
IA32_MCi_ADDR MSR
IA32_MCi_MISC MSR
Global Control MSRs
(One Set for Each Hardware Unit)
0
63
IA32_MCG_CTL MSR