15-48 Vol. 3
MACHINE-CHECK ARCHITECTURE
RESTARTABILITY = FALSE;
FI
FI;
IF RESTARTABILITY = FALSE
THEN
Report RESTARTABILITY to console;
Reset system;
FI;
IF MCA_BROADCAST = TRUE
THEN
IF ProcessorCount = MAX_PROCESSORS
AND NOERROR = TRUE
THEN
Report RESTARTABILITY to console;
Reset system;
FI;
Release SpinLock;
Wait till ProcessorCount = MAX_PROCESSRS on system;
(* implement a timeout and abort function if necessary *)
FI;
CLEAR MCIP flag in IA32_MCG_STATUS;
RESUME Execution;
(* End of MACHINE CHECK HANDLER*)
MCA ERROR PROCESSING: (* MCA Error Processing Routine called from MCA Handler *)
IF MCIP flag in IA32_MCG_STATUS = 0
THEN (* MCIP=0 upon MCA is unexpected *)
RESTARTABILITY = FALSE;
FI;
FOR each bank of machine-check registers
DO
CLEAR_MC_BANK = FALSE;
READ IA32_MCi_STATUS;
IF VAL Flag in IA32_MCi_STATUS = 1
THEN
IF UC Flag in IA32_MCi_STATUS = 1
THEN
IF Bit 24 in IA32_MCG_CAP = 0
THEN (* the processor does not support software error recovery *)
RESTARTABILITY = FALSE;
NOERROR = FALSE;
GOTO LOG MCA REGISTER;
FI;
(* the processor supports software error recovery *)
IF EN Flag in IA32_MCi_STATUS = 0 AND OVER Flag in IA32_MCi_STATUS=0
THEN (* It is a spurious MCA Log. Log and clear the register *)
CLEAR_MC_BANK = TRUE;
GOTO LOG MCA REGISTER;
FI;