IntelFspPkg/FspSecCore/Ia32/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 ; Abstract:
  13 ;
  14 ;  Reset Vector Data structure
  15 ;  This structure is located at 0xFFFFFFC0
  16 ;
  17 ;------------------------------------------------------------------------------
  18
  19     .model  tiny
  20     .686p
  21     .stack  0h
  22     .code
  23
  24 ;
  25 ; The layout of this file is fixed. The build tool makes assumption of the layout.
  26 ;
  27
  28     ORG     0h
  29 ;
  30 ; Reserved
  31 ;
  32 ReservedData         DD 0eeeeeeeeh, 0eeeeeeeeh
  33
  34     ORG     10h
  35 ;
  36 ; This is located at 0xFFFFFFD0h
  37 ;
  38     mov     di, "AP"
  39     jmp     ApStartup
  40
  41     ORG     20h
  42 ;
  43 ; Pointer to the entry point of the PEI core
  44 ; It is located at 0xFFFFFFE0, and is fixed up by some build tool
  45 ; So if the value 8..1 appears in the final FD image, tool failure occurs.
  46 ;
  47 PeiCoreEntryPoint       DD      12345678h
  48
  49 ;
  50 ; This is the handler for all kinds of exceptions. Since it's for debugging
  51 ; purpose only, nothing except a deadloop would be done here. Developers could
  52 ; analyze the cause of the exception if a debugger had been attached.
  53 ;
  54 InterruptHandler    PROC
  55     jmp     $
  56     iret
  57 InterruptHandler    ENDP
  58
  59     ORG     30h
  60 ;
  61 ; For IA32, the reset vector must be at 0xFFFFFFF0, i.e., 4G-16 byte
  62 ; Execution starts here upon power-on/platform-reset.
  63 ;
  64 ResetHandler:
  65     nop
  66     nop
  67
  68 ApStartup:
  69     ;
  70     ; Jmp Rel16 instruction
  71     ; Use machine code directly in case of the assembler optimization
  72     ; SEC entry point relatvie address will be fixed up by some build tool.
  73     ;
  74     ; Typically, SEC entry point is the function _ModuleEntryPoint() defined in
  75     ; SecEntry.asm
  76     ;
  77     DB      0e9h
  78     DW      -3
  79
  80
  81     ORG     38h
  82 ;
  83 ; Ap reset vector segment address is at 0xFFFFFFF8
  84 ; This will be fixed up by some build tool,
  85 ; so if the value 1..8 appears in the final FD image,
  86 ; tool failure occurs
  87 ;
  88 ApSegAddress    dd      12345678h
  89
  90     ORG     3ch
  91 ;
  92 ; BFV Base is at 0xFFFFFFFC
  93 ; This will be fixed up by some build tool,
  94 ; so if the value 1..8 appears in the final FD image,
  95 ; tool failure occurs.
  96 ;
  97 BfvBase     DD      12345678h
  98
  99 ;
 100 ; Nothing can go here, otherwise the layout of this file would change.
 101 ;
 102
 103     END