MdeModulePkg/Core/DxeIplPeim/Ia32/IdtVectorAsm.asm

   1 ;-------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2007, 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 ;
  13 ; Module Name:
  14 ;
  15 ;   IdtVectorAsm.asm
  16 ;
  17 ; Abstract:
  18 ;
  19 ;
  20 ;-------------------------------------------------------------------------------
  21
  22
  23     .686p
  24     .model  flat,C
  25     .code
  26
  27 ;
  28 ;------------------------------------------------------------------------------
  29 ;  Generic IDT Vector Handlers for the Host.
  30 ;
  31 ;------------------------------------------------------------------------------
  32
  33 ALIGN   8
  34 PUBLIC  AsmGetVectorTemplatInfo
  35 PUBLIC  AsmVectorFixup
  36
  37 PUBLIC  AsmVectorFixup
  38
  39 @VectorTemplateBase:
  40         push  eax
  41         db    6ah       ; push #VectorNumber
  42 @VectorNum:
  43         db    0
  44         mov   eax, CommonInterruptEntry
  45         jmp   eax
  46 @VectorTemplateEnd:
  47
  48
  49 AsmGetVectorTemplatInfo PROC
  50         mov   ecx, [esp + 4]
  51         mov   [ecx], @VectorTemplateBase
  52         mov   eax, (@VectorTemplateEnd - @VectorTemplateBase)
  53         ret
  54 AsmGetVectorTemplatInfo ENDP
  55
  56
  57 AsmVectorFixup PROC
  58         mov   eax, dword ptr [esp + 8]
  59         mov   ecx, [esp + 4]
  60         mov   [ecx + (@VectorNum - @VectorTemplateBase)], al
  61         ret
  62 AsmVectorFixup ENDP
  63
  64
  65 ;---------------------------------------;
  66 ; CommonInterruptEntry                  ;
  67 ;---------------------------------------;
  68 ; The follow algorithm is used for the common interrupt routine.
  69
  70 ;
  71 ; +---------------------+ <-- 16-byte aligned ensured by processor
  72 ; +    Old SS           +
  73 ; +---------------------+
  74 ; +    Old RSP          +
  75 ; +---------------------+
  76 ; +    RFlags           +
  77 ; +---------------------+
  78 ; +    CS               +
  79 ; +---------------------+
  80 ; +    RIP              +
  81 ; +---------------------+
  82 ; +    Error Code       +
  83 ; +---------------------+
  84 ; +    Vector Number    +
  85 ; +---------------------+
  86
  87 CommonInterruptEntry PROC
  88   cli
  89
  90   jmp $
  91 CommonInterruptEntry ENDP
  92
  93 END
  94
  95