MdePkg/Library/BaseLib/Ia32/CpuIdEx.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Module Name:
   7 ;
   8 ;   CpuIdEx.Asm
   9 ;
  10 ; Abstract:
  11 ;
  12 ;   AsmCpuidEx function
  13 ;
  14 ; Notes:
  15 ;
  16 ;------------------------------------------------------------------------------
  17
  18     SECTION .text
  19
  20 ;------------------------------------------------------------------------------
  21 ;  UINT32
  22 ;  EFIAPI
  23 ;  AsmCpuidEx (
  24 ;    IN   UINT32  RegisterInEax,
  25 ;    IN   UINT32  RegisterInEcx,
  26 ;    OUT  UINT32  *RegisterOutEax  OPTIONAL,
  27 ;    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
  28 ;    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
  29 ;    OUT  UINT32  *RegisterOutEdx  OPTIONAL
  30 ;    )
  31 ;------------------------------------------------------------------------------
  32 global ASM_PFX(AsmCpuidEx)
  33 ASM_PFX(AsmCpuidEx):
  34     push    ebx
  35     push    ebp
  36     mov     ebp, esp
  37     mov     eax, [ebp + 12]
  38     mov     ecx, [ebp + 16]
  39     cpuid
  40     push    ecx
  41     mov     ecx, [ebp + 20]
  42     jecxz   .0
  43     mov     [ecx], eax
  44 .0:
  45     mov     ecx, [ebp + 24]
  46     jecxz   .1
  47     mov     [ecx], ebx
  48 .1:
  49     mov     ecx, [ebp + 32]
  50     jecxz   .2
  51     mov     [ecx], edx
  52 .2:
  53     mov     ecx, [ebp + 28]
  54     jecxz   .3
  55     pop     DWORD [ecx]
  56 .3:
  57     mov     eax, [ebp + 12]
  58     leave
  59     pop     ebx
  60     ret
  61