IntelFspWrapperPkg/FspWrapperSecCore/Ia32/ResetVec.asm16

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Module Name:
   7 ;
   8 ;  ResetVec.asm
   9 ;
  10 ; Abstract:
  11 ;
  12 ;  Reset Vector Data structure
  13 ;  This structure is located at 0xFFFFFFC0
  14 ;
  15 ;------------------------------------------------------------------------------
  16
  17     .model  tiny
  18     .686p
  19     .stack  0h
  20     .code
  21
  22 ;
  23 ; The layout of this file is fixed. The build tool makes assumption of the layout.
  24 ;
  25
  26     ORG     0h
  27 ;
  28 ; Reserved
  29 ;
  30 ReservedData         DD 0eeeeeeeeh, 0eeeeeeeeh
  31
  32     ORG     10h
  33 ;
  34 ; This is located at 0xFFFFFFD0h
  35 ;
  36     mov     di, "AP"
  37     jmp     ApStartup
  38
  39     ORG     20h
  40 ;
  41 ; Pointer to the entry point of the PEI core
  42 ; It is located at 0xFFFFFFE0, and is fixed up by some build tool
  43 ; So if the value 8..1 appears in the final FD image, tool failure occurs.
  44 ;
  45 PeiCoreEntryPoint       DD      87654321h
  46
  47 ;
  48 ; This is the handler for all kinds of exceptions. Since it's for debugging
  49 ; purpose only, nothing except a deadloop would be done here. Developers could
  50 ; analyze the cause of the exception if a debugger had been attached.
  51 ;
  52 InterruptHandler    PROC
  53     jmp     $
  54     iret
  55 InterruptHandler    ENDP
  56
  57     ORG     30h
  58 ;
  59 ; For IA32, the reset vector must be at 0xFFFFFFF0, i.e., 4G-16 byte
  60 ; Execution starts here upon power-on/platform-reset.
  61 ;
  62 ResetHandler:
  63     nop
  64     nop
  65 ApStartup:
  66     ;
  67     ; Jmp Rel16 instruction
  68     ; Use machine code directly in case of the assembler optimization
  69     ; SEC entry point relatvie address will be fixed up by some build tool.
  70     ;
  71     ; Typically, SEC entry point is the function _ModuleEntryPoint() defined in
  72     ; SecEntry.asm
  73     ;
  74     DB      0e9h
  75     DW      -3
  76
  77
  78     ORG     38h
  79 ;
  80 ; Ap reset vector segment address is at 0xFFFFFFF8
  81 ; This will be fixed up by some build tool,
  82 ; so if the value 1..8 appears in the final FD image,
  83 ; tool failure occurs
  84 ;
  85 ApSegAddress    dd      12345678h
  86
  87     ORG     3ch
  88 ;
  89 ; BFV Base is at 0xFFFFFFFC
  90 ; This will be fixed up by some build tool,
  91 ; so if the value 1..8 appears in the final FD image,
  92 ; tool failure occurs.
  93 ;
  94 BfvBase     DD      12345678h
  95
  96 ;
  97 ; Nothing can go here, otherwise the layout of this file would change.
  98 ;
  99
 100     END