EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/CpuIdEx.asm

   1 ; Copyright (c) 2004, Intel Corporation
   2 ; All rights reserved. This program and the accompanying materials
   3 ; are licensed and made available under the terms and conditions of the BSD License
   4 ; which accompanies this distribution.  The full text of the license may be found at
   5 ; http://opensource.org/licenses/bsd-license.php
   6 ;
   7 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   8 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   9 ;
  10 ; Module Name:
  11 ;
  12 ;   CpuIdEx.Asm
  13 ;
  14 ; Abstract:
  15 ;
  16 ;   AsmCpuidEx function
  17 ;
  18 ; Notes:
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22     .code
  23
  24 ;------------------------------------------------------------------------------
  25 ;  UINT32
  26 ;  EFIAPI
  27 ;  AsmCpuidEx (
  28 ;    IN   UINT32  RegisterInEax,
  29 ;    IN   UINT32  RegisterInEcx,
  30 ;    OUT  UINT32  *RegisterOutEax  OPTIONAL,
  31 ;    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
  32 ;    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
  33 ;    OUT  UINT32  *RegisterOutEdx  OPTIONAL
  34 ;    )
  35 ;------------------------------------------------------------------------------
  36 AsmCpuidEx  PROC    USES    rbx
  37     mov     eax, ecx
  38     mov     ecx, edx
  39     push    rax                         ; save Index on stack
  40     cpuid
  41     mov     r10, [rsp + 38h]
  42     test    r10, r10
  43     jz      @F
  44     mov     [r10], ecx
  45 @@:
  46     mov     rcx, r8
  47     jrcxz   @F
  48     mov     [rcx], eax
  49 @@:
  50     mov     rcx, r9
  51     jrcxz   @F
  52     mov     [rcx], ebx
  53 @@:
  54     mov     rcx, [rsp + 40h]
  55     jrcxz   @F
  56     mov     [rcx], edx
  57 @@:
  58     pop     rax                         ; restore Index to rax as return value
  59     ret
  60 AsmCpuidEx  ENDP
  61
  62     END