diff options
Diffstat (limited to 'Core/CPU/x64/x64AsmLib/CPULib_GetInterruptState.asm')
| -rw-r--r-- | Core/CPU/x64/x64AsmLib/CPULib_GetInterruptState.asm | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/Core/CPU/x64/x64AsmLib/CPULib_GetInterruptState.asm b/Core/CPU/x64/x64AsmLib/CPULib_GetInterruptState.asm new file mode 100644 index 0000000..436cba7 --- /dev/null +++ b/Core/CPU/x64/x64AsmLib/CPULib_GetInterruptState.asm @@ -0,0 +1,87 @@ +;************************************************************************* +;************************************************************************* +;** ** +;** (C)Copyright 1985-2009, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;************************************************************************* +;************************************************************************* + +;************************************************************************* +; $Header: /Alaska/SOURCE/Core/Modules/x64Core/x64AsmLib/CPULib_GetInterruptState.asm 1 10/01/10 5:07p Felixp $ +; +; $Revision: 1 $ +; +; $Date: 10/01/10 5:07p $ +;************************************************************************* +; Revision History +; ---------------- +; $Log: /Alaska/SOURCE/Core/Modules/x64Core/x64AsmLib/CPULib_GetInterruptState.asm $ +; +; 1 10/01/10 5:07p Felixp +; +; 1 8/24/06 12:57p Felixp +; +;************************************************************************* +;<AMI_FHDR_START> +; +; Name: +; +; Description: +; +;<AMI_FHDR_END> +;************************************************************************* +.code + +;************************************************************************* +;<AMI_PHDR_START> +; +; Name: CPULib_GetInterruptState +; +; Description: +; BOOLEAN CPULib_GetInterruptState()returns the current CPU interrupt state. +; +; Input: +; VOID. +; +; Output: +; FALSE if interrupts are disabled; otherwise TRUE. +; +; Modified: +; +; Referrals: +; +; Notes: +; +;<AMI_PHDR_END> +;************************************************************************* +CPULib_GetInterruptState PROC PUBLIC + xor cl, cl + pushf ; push flags onto stack. + pop ax ; eax = flags. + bt ax, 9 ; IF (bit 9) if set, set carry flag. + ; Interrupts are allowed if IF is set. + adc cl, 0 ; CL = IF = CF. + + mov al, cl ; Return value + ret +CPULib_GetInterruptState ENDP + +END +;************************************************************************* +;************************************************************************* +;** ** +;** (C)Copyright 1985-2009, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;************************************************************************* |