IntelFrameworkModulePkg/Csm/LegacyBiosDxe/IA32/InterruptTable.asm

   1 ;; @file
   2 ;  Interrupt Redirection Template
   3 ;
   4 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   5 ;
   6 ; This program and the accompanying materials
   7 ; are licensed and made available under the terms and conditions
   8 ; of the BSD License which accompanies this distribution.  The
   9 ; full text of the license may be found at
  10 ; http://opensource.org/licenses/bsd-license.php
  11 ;
  12 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14 ;
  15 ;;
  16
  17 .686P
  18 .MODEL FLAT, C
  19 .CODE
  20
  21 ;----------------------------------------------------------------------------
  22 ; Procedure:    InterruptRedirectionTemplate: Redirects interrupts 0x68-0x6F
  23 ;
  24 ; Input:        None
  25 ;
  26 ; Output:       None
  27 ;
  28 ; Prototype:    VOID
  29 ;               InterruptRedirectionTemplate (
  30 ;                                VOID
  31 ;                                );
  32 ;
  33 ; Saves:        None
  34 ;
  35 ; Modified:     None
  36 ;
  37 ; Description:  Contains the code that is copied into low memory (below 640K).
  38 ;               This code reflects interrupts 0x68-0x6f to interrupts 0x08-0x0f.
  39 ;               This template must be copied into low memory, and the IDT entries
  40 ;               0x68-0x6F must be point to the low memory copy of this code.  Each
  41 ;               entry is 4 bytes long, so IDT entries 0x68-0x6F can be easily
  42 ;               computed.
  43 ;
  44 ;----------------------------------------------------------------------------
  45
  46 InterruptRedirectionTemplate PROC  C
  47   int     08h
  48   DB      0cfh          ; IRET
  49   nop
  50   int     09h
  51   DB      0cfh          ; IRET
  52   nop
  53   int     0ah
  54   DB      0cfh          ; IRET
  55   nop
  56   int     0bh
  57   DB      0cfh          ; IRET
  58   nop
  59   int     0ch
  60   DB      0cfh          ; IRET
  61   nop
  62   int     0dh
  63   DB      0cfh          ; IRET
  64   nop
  65   int     0eh
  66   DB      0cfh          ; IRET
  67   nop
  68   int     0fh
  69   DB      0cfh          ; IRET
  70   nop
  71 InterruptRedirectionTemplate ENDP
  72
  73 END