ArmPlatformPkg/PrePi/Exception.S

   1 //
   2 //  Copyright (c) 2011, ARM Limited. All rights reserved.
   3 //
   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 #
  13
  14 #include <AsmMacroIoLib.h>
  15 #include <Base.h>
  16 #include <AutoGen.h>
  17
  18 #start of the code section
  19 .text
  20 .align 5
  21
  22 # IMPORT
  23 GCC_ASM_IMPORT(PrePiCommonExceptionEntry)
  24
  25 # EXPORT
  26 GCC_ASM_EXPORT(PrePiVectorTable)
  27
  28 //============================================================
  29 //Default Exception Handlers
  30 //============================================================
  31
  32 ASM_PFX(PrePiVectorTable):
  33   b _DefaultResetHandler
  34   b _DefaultUndefined
  35   b _DefaultSWI
  36   b _DefaultPrefetchAbort
  37   b _DefaultDataAbort
  38   b _DefaultReserved
  39   b _DefaultIrq
  40   b _DefaultFiq
  41
  42 //
  43 // Default Exception handlers: There is no plan to return from any of these exceptions.
  44 // No context saving at all.
  45 //
  46 _DefaultResetHandler:
  47   mov  r1, lr
  48   # Switch to SVC for common stack
  49   cps  #0x13
  50   mov  r0, #0
  51    blx   ASM_PFX(PrePiCommonExceptionEntry)
  52
  53 _DefaultUndefined:
  54   sub  r1, LR, #4
  55   # Switch to SVC for common stack
  56   cps  #0x13
  57   mov  r0, #1
  58    blx   ASM_PFX(PrePiCommonExceptionEntry)
  59
  60 _DefaultSWI:
  61   sub  r1, LR, #4
  62   # Switch to SVC for common stack
  63   cps  #0x13
  64   mov  r0, #2
  65    blx   ASM_PFX(PrePiCommonExceptionEntry)
  66
  67 _DefaultPrefetchAbort:
  68   sub  r1, LR, #4
  69   # Switch to SVC for common stack
  70   cps  #0x13
  71   mov  r0, #3
  72    blx   ASM_PFX(PrePiCommonExceptionEntry)
  73
  74 _DefaultDataAbort:
  75   sub  r1, LR, #8
  76   # Switch to SVC for common stack
  77   cps  #0x13
  78   mov  r0, #4
  79    blx   ASM_PFX(PrePiCommonExceptionEntry)
  80
  81 _DefaultReserved:
  82   mov  r1, lr
  83   # Switch to SVC for common stack
  84   cps  #0x13
  85   mov  r0, #5
  86    blx   ASM_PFX(PrePiCommonExceptionEntry)
  87
  88 _DefaultIrq:
  89   sub  r1, LR, #4
  90   # Switch to SVC for common stack
  91   cps  #0x13
  92   mov  r0, #6
  93    blx   ASM_PFX(PrePiCommonExceptionEntry)
  94
  95 _DefaultFiq:
  96   sub  r1, LR, #4
  97   # Switch to SVC for common stack
  98   cps  #0x13
  99   mov  r0, #7
 100    blx   ASM_PFX(PrePiCommonExceptionEntry)
 101