MdeModulePkg/Core/DxeIplPeim/Ia32/IdtVectorAsm.asm

   1 ;/** @file
   2 ;
   3 ;    IDT vector entry.
   4 ;
   5 ;  Copyright (c) 2007 - 2008, Intel Corporation. All rights reserved.<BR>
   6 ;  This program and the accompanying materials
   7 ;  are licensed and made available under the terms and conditions of the BSD License
   8 ;  which accompanies this distribution.  The full text of the license may be found at
   9 ;  http://opensource.org/licenses/bsd-license.php
  10 ;
  11 ;  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 ;  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 ;
  14 ;**/
  15
  16     .686p
  17     .model  flat,C
  18     .code
  19
  20 ;
  21 ;------------------------------------------------------------------------------
  22 ;  Generic IDT Vector Handlers for the Host.
  23 ;
  24 ;------------------------------------------------------------------------------
  25
  26 ALIGN   8
  27 PUBLIC  AsmGetVectorTemplatInfo
  28 PUBLIC  AsmVectorFixup
  29
  30 PUBLIC  AsmVectorFixup
  31
  32 @VectorTemplateBase:
  33         push  eax
  34         db    6ah       ; push #VectorNumber
  35 @VectorNum:
  36         db    0
  37         mov   eax, CommonInterruptEntry
  38         jmp   eax
  39 @VectorTemplateEnd:
  40
  41
  42 AsmGetVectorTemplatInfo PROC
  43         mov   ecx, [esp + 4]
  44         mov   [ecx], @VectorTemplateBase
  45         mov   eax, (@VectorTemplateEnd - @VectorTemplateBase)
  46         ret
  47 AsmGetVectorTemplatInfo ENDP
  48
  49
  50 AsmVectorFixup PROC
  51         mov   eax, dword ptr [esp + 8]
  52         mov   ecx, [esp + 4]
  53         mov   [ecx + (@VectorNum - @VectorTemplateBase)], al
  54         ret
  55 AsmVectorFixup ENDP
  56
  57
  58 ;---------------------------------------;
  59 ; CommonInterruptEntry                  ;
  60 ;---------------------------------------;
  61 ; The follow algorithm is used for the common interrupt routine.
  62
  63 ;
  64 ; +---------------------+ <-- 16-byte aligned ensured by processor
  65 ; +    Old SS           +
  66 ; +---------------------+
  67 ; +    Old RSP          +
  68 ; +---------------------+
  69 ; +    RFlags           +
  70 ; +---------------------+
  71 ; +    CS               +
  72 ; +---------------------+
  73 ; +    RIP              +
  74 ; +---------------------+
  75 ; +    Error Code       +
  76 ; +---------------------+
  77 ; +    Vector Number    +
  78 ; +---------------------+
  79
  80 CommonInterruptEntry PROC
  81   cli
  82
  83   jmp $
  84 CommonInterruptEntry ENDP
  85
  86 END
  87
  88