EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ia32/WriteIdt.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 # 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 #   WriteIdt.Asm
  15 #
  16 # Abstract:
  17 #
  18 #   SetIdtBase function
  19 #
  20 # Notes:
  21 #
  22 #include "EfiBind.h"
  23 #------------------------------------------------------------------------------
  24
  25     .586:
  26     #.MODEL flat,C
  27     .code:
  28 #------------------------------------------------------------------------------
  29
  30 .globl ASM_PFX(SetIdtBase)
  31
  32 # void
  33 # SetIdtBase (
  34 #   UINT32  IdtBase,
  35 #   UINT16  IdtLimit
  36 #   )
  37 #
  38 # Abstract: Set IDTR with the given physical address
  39 #
  40 ASM_PFX(SetIdtBase):
  41    push   %ebp
  42    mov    %esp,%ebp
  43    add    $0xfffffff8,%esp
  44    mov    0x8(%ebp),%eax
  45    mov    0xc(%ebp),%cx
  46    mov    %eax,0xfffffffc(%ebp)
  47    mov    %cx,0xfffffffa(%ebp)
  48    lidtl  0xfffffffa(%ebp)
  49    leave
  50    ret