MdePkg/Library/BaseLib/Ia32/CpuIdEx.S

   1 //
   2 // Include common header file for this module.
   3 //
   4 #include "CommonHeader.h"
   5
   6 #------------------------------------------------------------------------------
   7 #
   8 # Copyright (c) 2006, Intel Corporation
   9 # All rights reserved. This program and the accompanying materials
  10 # are licensed and made available under the terms and conditions of the BSD License
  11 # which accompanies this distribution.  The full text of the license may be found at
  12 # http://opensource.org/licenses/bsd-license.php
  13 #
  14 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  15 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  16 #
  17 # Module Name:
  18 #
  19 #   CpuIdEx.Asm
  20 #
  21 # Abstract:
  22 #
  23 #   AsmCpuidEx function
  24 #
  25 # Notes:
  26 #
  27 #------------------------------------------------------------------------------
  28
  29     .686:
  30     .code:
  31
  32 #------------------------------------------------------------------------------
  33 #  UINT32
  34 #  EFIAPI
  35 #  AsmCpuidEx (
  36 #    IN   UINT32  RegisterInEax,
  37 #    IN   UINT32  RegisterInEcx,
  38 #    OUT  UINT32  *RegisterOutEax  OPTIONAL,
  39 #    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
  40 #    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
  41 #    OUT  UINT32  *RegisterOutEdx  OPTIONAL
  42 #    )
  43 #------------------------------------------------------------------------------
  44 .globl ASM_PFX(AsmCpuidEx)
  45 ASM_PFX(AsmCpuidEx):
  46     push    %ebx
  47     push    %ebp
  48     movl    %esp, %ebp
  49     movl    12(%ebp), %eax
  50     movl    16(%ebp), %ecx
  51     cpuid
  52     push    %ecx
  53     movl    20(%ebp), %ecx
  54     jecxz   L1
  55     movl    %eax, (%ecx)
  56 L1:
  57     movl    24(%ebp), %ecx
  58     jecxz   L2
  59     movl    %ebx, (%ecx)
  60 L2:
  61     movl    28(%ebp), %ecx
  62     jecxz   L3
  63     popl    (%ecx)
  64 L3:
  65     movl    32(%ebp), %edx
  66     jecxz   L4
  67     movl    %edx, (%ecx)
  68 L4:
  69     movl    12(%ebp), %eax
  70     leave
  71     pop     %ebx
  72     ret