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/** @file
AsmCpuid function.
Copyright (c) 2006 - 2007, Intel Corporation<BR>
All rights reserved. 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.
**/
//
// Include common header file for this module.
//
#include "CommonHeader.h"
UINT32
EFIAPI
AsmCpuid (
IN UINT32 Index,
OUT UINT32 *RegisterEax, OPTIONAL
OUT UINT32 *RegisterEbx, OPTIONAL
OUT UINT32 *RegisterEcx, OPTIONAL
OUT UINT32 *RegisterEdx OPTIONAL
)
{
_asm {
mov eax, Index
cpuid
push ecx
mov ecx, RegisterEax
jecxz SkipEax
mov [ecx], eax
SkipEax:
mov ecx, RegisterEbx
jecxz SkipEbx
mov [ecx], ebx
SkipEbx:
pop eax
mov ecx, RegisterEcx
jecxz SkipEcx
mov [ecx], eax
SkipEcx:
mov ecx, RegisterEdx
jecxz SkipEdx
mov [ecx], edx
SkipEdx:
mov eax, Index
}
}
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