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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 | |
c1288a39 | 39 | push rax ; save Index on stack |
50a3fe95 | 40 | push rdx |
c1288a39 LG |
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 |