mirror of https://github.com/acidanthera/audk.git
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/** @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.
|
|
//
|
|
|
|
|
|
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
|
|
}
|
|
}
|
|
|