1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
4; 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    DEFAULT REL
25    SECTION .text
26
27;------------------------------------------------------------------------------
28;  VOID
29;  EFIAPI
30;  AsmCpuid (
31;    IN   UINT32  RegisterInEax,
32;    OUT  UINT32  *RegisterOutEax  OPTIONAL,
33;    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
34;    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
35;    OUT  UINT32  *RegisterOutEdx  OPTIONAL
36;    )
37;------------------------------------------------------------------------------
38global ASM_PFX(AsmCpuid)
39ASM_PFX(AsmCpuid):
40    push    rbx
41    mov     eax, ecx
42    push    rax                         ; save Index on stack
43    push    rdx
44    cpuid
45    test    r9, r9
46    jz      .0
47    mov     [r9], ecx
48.0:
49    pop     rcx
50    jrcxz   .1
51    mov     [rcx], eax
52.1:
53    mov     rcx, r8
54    jrcxz   .2
55    mov     [rcx], ebx
56.2:
57    mov     rcx, [rsp + 0x38]
58    jrcxz   .3
59    mov     [rcx], edx
60.3:
61    pop     rax                         ; restore Index to rax as return value
62    pop     rbx
63    ret
64
65