;------------------------------------------------------------------------------

;

; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>

; This program and the accompanying materials

; are licensed and made available under the terms and conditions of the BSD License

; which accompanies this distribution. The full text of the license may be found at

; http://opensource.org/licenses/bsd-license.php.

;

; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,

; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

;

; Module Name:

;

; CpuId.Asm

;

; Abstract:

;

; AsmCpuid function

;

; Notes:

;

;------------------------------------------------------------------------------

.code

;------------------------------------------------------------------------------

; VOID

; EFIAPI

; AsmCpuid (

; IN UINT32 RegisterInEax,

; OUT UINT32 *RegisterOutEax OPTIONAL,

; OUT UINT32 *RegisterOutEbx OPTIONAL,

; OUT UINT32 *RegisterOutEcx OPTIONAL,

; OUT UINT32 *RegisterOutEdx OPTIONAL

; )

;------------------------------------------------------------------------------

AsmCpuid PROC USES rbx

mov eax, ecx

push rax ; save Index on stack

push rdx

cpuid

test r9, r9

jz @F

mov [r9], ecx

@@:

pop rcx

jrcxz @F

mov [rcx], eax

@@:

mov rcx, r8

jrcxz @F

mov [rcx], ebx

@@:

mov rcx, [rsp + 38h]

jrcxz @F

mov [rcx], edx

@@:

pop rax ; restore Index to rax as return value

ret

AsmCpuid ENDP

END