MdePkg/Library/BaseLib/Ia32/CpuIdEx.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006 - 2008, Intel Corporation
   4 # All rights reserved. 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.S
  15 #
  16 # Abstract:
  17 #
  18 #   AsmCpuidEx function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24     .686:
  25     .code:
  26
  27 #------------------------------------------------------------------------------
  28 #  UINT32
  29 #  EFIAPI
  30 #  AsmCpuidEx (
  31 #    IN   UINT32  RegisterInEax,
  32 #    IN   UINT32  RegisterInEcx,
  33 #    OUT  UINT32  *RegisterOutEax  OPTIONAL,
  34 #    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
  35 #    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
  36 #    OUT  UINT32  *RegisterOutEdx  OPTIONAL
  37 #    )
  38 #------------------------------------------------------------------------------
  39 .globl ASM_PFX(AsmCpuidEx)
  40 ASM_PFX(AsmCpuidEx):
  41     push    %ebx
  42     push    %ebp
  43     movl    %esp, %ebp
  44     movl    12(%ebp), %eax
  45     movl    16(%ebp), %ecx
  46     cpuid
  47     push    %ecx
  48     movl    20(%ebp), %ecx
  49     jecxz   L1
  50     movl    %eax, (%ecx)
  51 L1:
  52     movl    24(%ebp), %ecx
  53     jecxz   L2
  54     movl    %ebx, (%ecx)
  55 L2:
  56     movl    28(%ebp), %ecx
  57     jecxz   L3
  58     popl    (%ecx)
  59 L3:
  60     movl    32(%ebp), %edx
  61     jecxz   L4
  62     movl    %edx, (%ecx)
  63 L4:
  64     movl    12(%ebp), %eax
  65     leave
  66     pop     %ebx
  67     ret