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e29e52e7 | 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.S | |
15 | # | |
16 | # Abstract: | |
17 | # | |
18 | # AsmCpuid function | |
19 | # | |
20 | # Notes: | |
21 | # | |
22 | #------------------------------------------------------------------------------ | |
23 | ||
24 | #------------------------------------------------------------------------------ | |
25 | # VOID | |
26 | # EFIAPI | |
27 | # AsmCpuid ( | |
28 | # IN UINT32 RegisterInEax, | |
29 | # OUT UINT32 *RegisterOutEax OPTIONAL, | |
30 | # OUT UINT32 *RegisterOutEbx OPTIONAL, | |
31 | # OUT UINT32 *RegisterOutEcx OPTIONAL, | |
32 | # OUT UINT32 *RegisterOutEdx OPTIONAL | |
33 | # ) | |
34 | #------------------------------------------------------------------------------ | |
35 | .global _AsmCpuid; | |
36 | _AsmCpuid: | |
37 | push %rbx | |
38 | mov %ecx, %eax | |
39 | push %rax # save Index on stack | |
40 | push %rdx | |
41 | cpuid | |
42 | test %r9, %r9 | |
43 | jz L1 | |
44 | mov %ecx, (%r9) | |
45 | L1: | |
46 | pop %rcx | |
47 | jrcxz L2 | |
48 | mov %eax, (%rcx) | |
49 | L2: | |
50 | mov %r8, %rcx | |
51 | jrcxz L3 | |
52 | mov %ebx, (%rcx) | |
53 | L3: | |
54 | mov 0x38(%rsp), %rcx | |
55 | jrcxz L4 | |
56 | mov %edx, (%rcx) | |
57 | L4: | |
58 | pop %rax # restore Index to rax as return value | |
59 | pop %rbx | |
60 | ret |