UefiCpuPkg/SecCore/Ia32/ResetVec.nasmb

   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.nasmb
  15 ;
  16 ; Abstract:
  17 ;
  18 ;  Reset Vector Data structure
  19 ;  This structure is located at 0xFFFFFFC0
  20 ;
  21 ;------------------------------------------------------------------------------
  22
  23 ;    .stack  0x0
  24 ;    SECTION .text
  25 USE16
  26
  27 ;
  28 ; The layout of this file is fixed. The build tool makes assumption of the layout.
  29 ;
  30
  31     ORG     0h
  32 ;
  33 ; Reserved
  34 ;
  35 ReservedData:            DD 0eeeeeeeeh, 0eeeeeeeeh
  36
  37     TIMES 0x10-($-$$) DB 0
  38 ;
  39 ; This is located at 0xFFFFFFD0h
  40 ;
  41     mov     di, "PA"
  42     jmp     ApStartup
  43
  44     TIMES 0x20-($-$$) DB 0
  45 ;
  46 ; Pointer to the entry point of the PEI core
  47 ; It is located at 0xFFFFFFE0, and is fixed up by some build tool
  48 ; So if the value 8..1 appears in the final FD image, tool failure occurs.
  49 ;
  50 PeiCoreEntryPoint:       DD      87654321h
  51
  52 ;
  53 ; This is the handler for all kinds of exceptions. Since it's for debugging
  54 ; purpose only, nothing except a dead loop would be done here. Developers could
  55 ; analyze the cause of the exception if a debugger had been attached.
  56 ;
  57 global ASM_PFX(InterruptHandler)
  58 ASM_PFX(InterruptHandler):
  59     jmp     $
  60     iret
  61
  62     TIMES 0x30-($-$$) DB 0
  63 ;
  64 ; For IA32, the reset vector must be at 0xFFFFFFF0, i.e., 4G-16 byte
  65 ; Execution starts here upon power-on/platform-reset.
  66 ;
  67 ResetHandler:
  68     nop
  69     nop
  70 ApStartup:
  71     ;
  72     ; Jmp Rel16 instruction
  73     ; Use machine code directly in case of the assembler optimization
  74     ; SEC entry point relative address will be fixed up by some build tool.
  75     ;
  76     ; Typically, SEC entry point is the function _ModuleEntryPoint() defined in
  77     ; SecEntry.asm
  78     ;
  79     DB      0e9h
  80     DW      -3
  81
  82
  83     TIMES 0x38-($-$$) DB 0
  84 ;
  85 ; Ap reset vector segment address is at 0xFFFFFFF8
  86 ; This will be fixed up by some build tool,
  87 ; so if the value 1..8 appears in the final FD image,
  88 ; tool failure occurs
  89 ;
  90 ApSegAddress:    dd      12345678h
  91
  92     TIMES 0x3c-($-$$) DB 0
  93 ;
  94 ; BFV Base is at 0xFFFFFFFC
  95 ; This will be fixed up by some build tool,
  96 ; so if the value 1..8 appears in the final FD image,
  97 ; tool failure occurs.
  98 ;
  99 BfvBase:     DD      12345678h
 100
 101 ;
 102 ; Nothing can go here, otherwise the layout of this file would change.
 103 ;