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

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006, 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.Asm
  15 #
  16 # Abstract:
  17 #
  18 #   AsmCpuidEx function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23 #include <EdkIIGlueBase.h>
  24
  25 #------------------------------------------------------------------------------
  26 #  UINT32
  27 #  EFIAPI
  28 #  AsmCpuidEx (
  29 #    IN   UINT32  RegisterInEax,
  30 #    IN   UINT32  RegisterInEcx,
  31 #    OUT  UINT32  *RegisterOutEax  OPTIONAL,
  32 #    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
  33 #    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
  34 #    OUT  UINT32  *RegisterOutEdx  OPTIONAL
  35 #    )
  36 #------------------------------------------------------------------------------
  37 .global ASM_PFX(AsmCpuidEx)
  38 ASM_PFX(AsmCpuidEx):
  39     push    %rbx
  40     movl    %ecx,%eax
  41     movl    %edx,%ecx
  42     push    %rax
  43     cpuid
  44     mov     0x38(%rsp), %r10
  45     test    %r10, %r10
  46     jz      L1
  47     mov     %ecx,(%r10)
  48 L1:
  49     mov     %r8, %rcx
  50     jrcxz   L2
  51     movl    %eax,(%rcx)
  52 L2:
  53     mov     %r9, %rcx
  54     jrcxz   L3
  55     mov     %ebx, (%rcx)
  56 L3:
  57     mov     0x40(%rsp), %rcx
  58     jrcxz   L4
  59     mov     %edx, (%rcx)
  60 L4:
  61     pop     %rax
  62     pop     %rbx
  63     ret