diff options
Diffstat (limited to 'Core/CPU/x64/x64AsmLib/WriteMsr.asm')
-rw-r--r-- | Core/CPU/x64/x64AsmLib/WriteMsr.asm | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/Core/CPU/x64/x64AsmLib/WriteMsr.asm b/Core/CPU/x64/x64AsmLib/WriteMsr.asm new file mode 100644 index 0000000..b181a5b --- /dev/null +++ b/Core/CPU/x64/x64AsmLib/WriteMsr.asm @@ -0,0 +1,89 @@ +;************************************************************************* +;************************************************************************* +;** ** +;** (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/WriteMsr.asm 1 10/01/10 5:08p Felixp $ +; +; $Revision: 1 $ +; +; $Date: 10/01/10 5:08p $ +;************************************************************************* +; Revision History +; ---------------- +; $Log: /Alaska/SOURCE/Core/Modules/x64Core/x64AsmLib/WriteMsr.asm $ +; +; 1 10/01/10 5:08p Felixp +; +; 1 8/24/06 12:57p Felixp +; +;************************************************************************* +;<AMI_FHDR_START> +; +; Name: +; +; Description: +; +;<AMI_FHDR_END> +;************************************************************************* +.code + +;************************************************************************* +;<AMI_PHDR_START> +; +; Name: WriteMsr +; +; Description: +; VOID WriteMsr(IN UINT32 Msr, IN UINT64 Value) writes the Value to the +; supplied MSR index, Msr. +; +; Input: +; IN UINT32 Msr +; 32-bit MSR index to be written to. +; +; IN UINT64 Value +; Value to be written to MSR index. +; +; Output: +; VOID. +; +; Modified: +; +; Referrals: +; +; Notes: +; +;<AMI_PHDR_END> +;************************************************************************* +WriteMsr proc + ;rcx = MSR + mov rax, rdx ;rax = rdx = Value + and rax, 0ffffffffh ;Lower 32 bit MSR Value + shr rdx, 32 ;Upper 32 bit MSR Value + wrmsr + ret +WriteMsr endp + +END +;************************************************************************* +;************************************************************************* +;** ** +;** (C)Copyright 1985-2009, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;************************************************************************* |