Intel IA-32 - Manual (Page 538)

14-12 Vol. 3A
MACHINE-CHECK ARCHITECTURE
Example 14-19. Machine-Check Initialization Pseudocode
Check CPUID Feature Flags for MCE and MCA support
IF CPU supports MCE
THEN
IF CPU supports MCA
THEN
IF (IA32_MCG_CAP.MCG_CTL_P = 1)
(* IA32_MCG_CTL register is present *)
THEN
IA32_MCG_CTL
←
FFFFFFFFFFFFFFFFH;
(* enables all MCA features *)
FI
(* Determine number of error-reporting banks supported *)
COUNT
←
IA32_MCG_CAP.Count;
MAX_BANK_NUMBER
←
COUNT - 1;
IF (Processor Family is 6H)
THEN
(* Enable logging of all errors except for MC0_CTL register *)
FOR error-reporting banks (1 through MAX_BANK_NUMBER)
DO
IA32_MCi_CTL
←
0FFFFFFFFFFFFFFFFH;
OD
(* Clear all errors *)
FOR error-reporting banks (0 through MAX_BANK_NUMBER)
DO
IA32_MCi_STATUS
←
0;
OD
ELSE IF (Processor Family is 0FH) (*any Processor Extended Family *)
THEN
(* Enable logging of all errors including MC0_CTL register *)
FOR error-reporting banks (0 through MAX_BANK_NUMBER)
DO
IA32_MCi_CTL
←
0FFFFFFFFFFFFFFFFH;
OD
(* BIOS clears all errors only on power-on reset *)
IF (BIOS detects Power-on reset)
THEN
FOR error-reporting banks (0 through MAX_BANK_NUMBER)
DO
IA32_MCi_STATUS
←
0;
OD
ELSE