projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c1288a39 LG |
1 | ;------------------------------------------------------------------------------ |
| 2 | ; | |
| 3 | ; Copyright (c) 2006, Intel Corporation | |
| 4 | ; All rights reserved. This program and the accompanying materials | |
| 5 | ; are licensed and made available under the terms and conditions of the BSD License | |
| 6 | ; which accompanies this distribution. The full text of the license may be found at | |
| 7 | ; http://opensource.org/licenses/bsd-license.php | |
| 8 | ; | |
| 9 | ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| 10 | ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| 11 | ; | |
| 12 | ; Module Name: | |
| 13 | ; | |
| 14 | ; CpuId.Asm | |
| 15 | ; | |
| 16 | ; Abstract: | |
| 17 | ; | |
| 18 | ; AsmCpuid function | |
| 19 | ; | |
| 20 | ; Notes: | |
| 21 | ; | |
| 22 | ;------------------------------------------------------------------------------ | |
| 23 | ||
| 24 | .code | |
| 25 | ||
| 26 | ;------------------------------------------------------------------------------ | |
| 27 | ; VOID | |
| 28 | ; EFIAPI | |
| 29 | ; AsmCpuid ( | |
| 30 | ; IN UINT32 RegisterInEax, | |
| 31 | ; OUT UINT32 *RegisterOutEax OPTIONAL, | |
| 32 | ; OUT UINT32 *RegisterOutEbx OPTIONAL, | |
| 33 | ; OUT UINT32 *RegisterOutEcx OPTIONAL, | |
| 34 | ; OUT UINT32 *RegisterOutEdx OPTIONAL | |
| 35 | ; ) | |
| 36 | ;------------------------------------------------------------------------------ | |
| 37 | AsmCpuid PROC USES rbx | |
| 38 | mov eax, ecx | |
| 39 | push rdx | |
| 40 | push rax ; save Index on stack | |
| 41 | cpuid | |
| 42 | test r9, r9 | |
| 43 | jz @F | |
| 44 | mov [r9], ecx | |
| 45 | @@: | |
| 46 | pop rcx | |
| 47 | jrcxz @F | |
| 48 | mov [rcx], eax | |
| 49 | @@: | |
| 50 | mov rcx, r8 | |
| 51 | jrcxz @F | |
| 52 | mov [rcx], ebx | |
| 53 | @@: | |
| 54 | mov rcx, [rsp + 38h] | |
| 55 | jrcxz @F | |
| 56 | mov [rcx], edx | |
| 57 | @@: | |
| 58 | pop rax ; restore Index to rax as return value | |
| 59 | ret | |
| 60 | AsmCpuid ENDP | |
| 61 | ||
| 62 | END |