ArmPlatformPkg/Sec/Exception.asm

   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   IMPORT  SecCommonExceptionEntry
  19   EXPORT  SecVectorTable
  20
  21   PRESERVE8
  22   AREA    SecException, CODE, READONLY, CODEALIGN, ALIGN=5
  23
  24 //============================================================
  25 //Default Exception Handlers
  26 //============================================================
  27
  28
  29 SecVectorTable
  30   b _DefaultResetHandler
  31   b _DefaultUndefined
  32   b _DefaultSWI
  33   b _DefaultPrefetchAbort
  34   b _DefaultDataAbort
  35   b _DefaultReserved
  36   b _DefaultIrq
  37   b _DefaultFiq
  38
  39 //
  40 // Default Exception handlers: There is no plan to return from any of these exceptions.
  41 // No context saving at all.
  42 //
  43 _DefaultResetHandler
  44    mov  r1, lr
  45    cps       #0x13                     ; Switch to SVC for common stack
  46    mov  r0, #0
  47    blx   SecCommonExceptionEntry
  48
  49 _DefaultUndefined
  50    sub  r1, LR
  51    cps       #0x13                     ; Switch to SVC for common stack
  52    mov  r0, #1
  53    blx   SecCommonExceptionEntry
  54
  55 _DefaultSWI
  56    sub  r1, LR, #4
  57    cps       #0x13                     ; Switch to SVC for common stack
  58    mov  r0, #2
  59    blx   SecCommonExceptionEntry
  60
  61 _DefaultPrefetchAbort
  62    sub  r1, LR, #4
  63    cps       #0x13                     ; Switch to SVC for common stack
  64    mov  r0, #3
  65    blx   SecCommonExceptionEntry
  66
  67 _DefaultDataAbort
  68    sub  r1, LR, #8
  69    cps       #0x13                     ; Switch to SVC for common stack
  70    mov  r0, #4
  71    blx   SecCommonExceptionEntry
  72
  73 _DefaultReserved
  74    mov  r1, lr
  75    cps       #0x13                     ; Switch to SVC for common stack
  76    mov  r0, #5
  77    blx   SecCommonExceptionEntry
  78
  79 _DefaultIrq
  80    sub  r1, LR, #4
  81    cps       #0x13                     ; Switch to SVC for common stack
  82    mov  r0, #6
  83    blx   SecCommonExceptionEntry
  84
  85 _DefaultFiq
  86    sub  r1, LR, #4
  87    cps       #0x13                     ; Switch to SVC for common stack
  88    mov  r0, #7
  89    blx   SecCommonExceptionEntry
  90
  91   END