ArmPlatformPkg/PrePeiCore/Arm/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(PeiCommonExceptionEntry)
  24
  25 # EXPORT
  26 GCC_ASM_EXPORT(PeiVectorTable)
  27
  28 //============================================================
  29 //Default Exception Handlers
  30 //============================================================
  31
  32
  33 ASM_PFX(PeiVectorTable):
  34   b _DefaultResetHandler
  35   b _DefaultUndefined
  36   b _DefaultSWI
  37   b _DefaultPrefetchAbort
  38   b _DefaultDataAbort
  39   b _DefaultReserved
  40   b _DefaultIrq
  41   b _DefaultFiq
  42
  43 //
  44 // Default Exception handlers: There is no plan to return from any of these exceptions.
  45 // No context saving at all.
  46 //
  47 _DefaultResetHandler:
  48   mov  r1, lr
  49   # Switch to SVC for common stack
  50   cps  #0x13
  51   mov  r0, #0
  52   blx  ASM_PFX(PeiCommonExceptionEntry)
  53
  54 _DefaultUndefined:
  55   sub  r1, LR, #4
  56   # Switch to SVC for common stack
  57   cps  #0x13
  58   mov  r0, #1
  59   blx  ASM_PFX(PeiCommonExceptionEntry)
  60
  61 _DefaultSWI:
  62   sub  r1, LR, #4
  63   # Switch to SVC for common stack
  64   cps  #0x13
  65   mov  r0, #2
  66   blx  ASM_PFX(PeiCommonExceptionEntry)
  67
  68 _DefaultPrefetchAbort:
  69   sub  r1, LR, #4
  70   # Switch to SVC for common stack
  71   cps  #0x13
  72   mov  r0, #3
  73   blx  ASM_PFX(PeiCommonExceptionEntry)
  74
  75 _DefaultDataAbort:
  76   sub  r1, LR, #8
  77   # Switch to SVC for common stack
  78   cps  #0x13
  79   mov  r0, #4
  80   blx  ASM_PFX(PeiCommonExceptionEntry)
  81
  82 _DefaultReserved:
  83   mov  r1, lr
  84   # Switch to SVC for common stack
  85   cps  #0x13
  86   mov  r0, #5
  87   blx  ASM_PFX(PeiCommonExceptionEntry)
  88
  89 _DefaultIrq:
  90   sub  r1, LR, #4
  91   # Switch to SVC for common stack
  92   cps  #0x13
  93   mov  r0, #6
  94   blx  ASM_PFX(PeiCommonExceptionEntry)
  95
  96 _DefaultFiq:
  97   sub  r1, LR, #4
  98   # Switch to SVC for common stack
  99   cps  #0x13
 100   mov  r0, #7
 101   blx  ASM_PFX(PeiCommonExceptionEntry)
 102