MdePkg/Library/BaseLib/X64/CpuIdEx.asm

   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 ;   CpuIdEx.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   AsmCpuidEx function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     .code
  25
  26 ;------------------------------------------------------------------------------
  27 ;  UINT32
  28 ;  EFIAPI
  29 ;  AsmCpuidEx (
  30 ;    IN   UINT32  RegisterInEax,
  31 ;    IN   UINT32  RegisterInEcx,
  32 ;    OUT  UINT32  *RegisterOutEax  OPTIONAL,
  33 ;    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
  34 ;    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
  35 ;    OUT  UINT32  *RegisterOutEdx  OPTIONAL
  36 ;    )
  37 ;------------------------------------------------------------------------------
  38 AsmCpuidEx  PROC    USES    rbx
  39     mov     eax, ecx
  40     mov     ecx, edx
  41     push    rax                         ; save Index on stack
  42     cpuid
  43     mov     r10, [rsp + 38h]
  44     test    r10, r10
  45     jz      @F
  46     mov     [r10], ecx
  47 @@:
  48     mov     rcx, r8
  49     jrcxz   @F
  50     mov     [rcx], eax
  51 @@:
  52     mov     rcx, r9
  53     jrcxz   @F
  54     mov     [rcx], ebx
  55 @@:
  56     mov     rcx, [rsp + 40h]
  57     jrcxz   @F
  58     mov     [rcx], edx
  59 @@:
  60     pop     rax                         ; restore Index to rax as return value
  61     ret
  62 AsmCpuidEx  ENDP
  63
  64     END