ResetVec.asm16

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2014, 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 ;  ResetVec.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;  Reset Vector Data structure
  19 ;  This structure is located at 0xFFFFFFC0
  20 ;
  21 ;------------------------------------------------------------------------------
  22
  23     .model  tiny
  24     .686p
  25     .stack  0h
  26     .code
  27
  28 ;
  29 ; The layout of this file is fixed. The build tool makes assumption of the layout.
  30 ;
  31
  32     ORG     0h
  33 ;
  34 ; Reserved
  35 ;
  36 ReservedData         DD 0eeeeeeeeh, 0eeeeeeeeh
  37
  38     ORG     10h
  39 ;
  40 ; This is located at 0xFFFFFFD0h
  41 ;
  42     mov     di, "AP"
  43     jmp     ApStartup
  44
  45     ORG     20h
  46 ;
  47 ; Pointer to the entry point of the PEI core
  48 ; It is located at 0xFFFFFFE0, and is fixed up by some build tool
  49 ; So if the value 8..1 appears in the final FD image, tool failure occurs.
  50 ;
  51 PeiCoreEntryPoint       DD      87654321h
  52
  53 ;
  54 ; This is the handler for all kinds of exceptions. Since it's for debugging
  55 ; purpose only, nothing except a deadloop would be done here. Developers could
  56 ; analyze the cause of the exception if a debugger had been attached.
  57 ;
  58 InterruptHandler    PROC
  59     jmp     $
  60     iret
  61 InterruptHandler    ENDP
  62
  63     ORG     30h
  64 ;
  65 ; For IA32, the reset vector must be at 0xFFFFFFF0, i.e., 4G-16 byte
  66 ; Execution starts here upon power-on/platform-reset.
  67 ;
  68 ResetHandler:
  69     nop
  70     nop
  71 ApStartup:
  72     ;
  73     ; Jmp Rel16 instruction
  74     ; Use machine code directly in case of the assembler optimization
  75     ; SEC entry point relatvie address will be fixed up by some build tool.
  76     ;
  77     ; Typically, SEC entry point is the function _ModuleEntryPoint() defined in
  78     ; SecEntry.asm
  79     ;
  80     DB      0e9h
  81     DW      -3
  82
  83
  84     ORG     38h
  85 ;
  86 ; Ap reset vector segment address is at 0xFFFFFFF8
  87 ; This will be fixed up by some build tool,
  88 ; so if the value 1..8 appears in the final FD image,
  89 ; tool failure occurs
  90 ;
  91 ApSegAddress    dd      12345678h
  92
  93     ORG     3ch
  94 ;
  95 ; BFV Base is at 0xFFFFFFFC
  96 ; This will be fixed up by some build tool,
  97 ; so if the value 1..8 appears in the final FD image,
  98 ; tool failure occurs.
  99 ;
 100 BfvBase     DD      12345678h
 101
 102 ;
 103 ; Nothing can go here, otherwise the layout of this file would change.
 104 ;
 105
 106     END