EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ia32/ReadIdt.asm

   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 ;   ReadIdtBase.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   ReadIdtBase function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     .586
  25     .model  flat,C
  26     .mmx
  27     .code
  28
  29 ;------------------------------------------------------------------------------
  30 ; UINTN
  31 ; ReadIdtBase (
  32 ;   void
  33 ;   )
  34 ;
  35 ; Abstract: Returns physical address of IDTR
  36 ;
  37 ReadIdtBase     PROC    C PUBLIC
  38                 LOCAL   IdtrBuf:FWORD
  39                 sidt    IdtrBuf
  40                 mov     eax, DWORD PTR IdtrBuf + 2
  41                 ret
  42 ReadIdtBase     ENDP
  43
  44 ;------------------------------------------------------------------------------
  45 ; UINT16
  46 ; ReadIdtLimit (
  47 ;   void
  48 ;   )
  49 ;
  50 ; Abstract: Returns Limit of IDTR
  51 ;
  52 ReadIdtLimit    PROC    C PUBLIC
  53                 LOCAL   IdtrBuf:FWORD
  54                 sidt    IdtrBuf
  55                 mov     ax, WORD PTR IdtrBuf
  56                 ret
  57 ReadIdtLimit    ENDP
  58
  59
  60     END