diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/CpuId.asm')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/CpuId.asm | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/CpuId.asm b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/CpuId.asm new file mode 100644 index 0000000..e46802c --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/CpuId.asm @@ -0,0 +1,60 @@ +; Copyright (c) 2004, Intel Corporation +; 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. +; +; 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 |