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 //FIXME: One of the EDK2 tool is broken. It does not look to respect the alignment. Even, if we specify 32-byte alignment for this file.
  29 Dummy1        DCD      0
  30 Dummy2        DCD      0
  31
  32 SecVectorTable
  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    cps       #0x13                     ; Switch to SVC for common stack
  49    mov  r0, #0
  50    blx   SecCommonExceptionEntry
  51
  52 _DefaultUndefined
  53    sub  r1, LR
  54    cps       #0x13                     ; Switch to SVC for common stack
  55    mov  r0, #1
  56    blx   SecCommonExceptionEntry
  57
  58 _DefaultSWI
  59    sub  r1, LR, #4
  60    cps       #0x13                     ; Switch to SVC for common stack
  61    mov  r0, #2
  62    blx   SecCommonExceptionEntry
  63
  64 _DefaultPrefetchAbort
  65    sub  r1, LR, #4
  66    cps       #0x13                     ; Switch to SVC for common stack
  67    mov  r0, #3
  68    blx   SecCommonExceptionEntry
  69
  70 _DefaultDataAbort
  71    sub  r1, LR, #8
  72    cps       #0x13                     ; Switch to SVC for common stack
  73    mov  r0, #4
  74    blx   SecCommonExceptionEntry
  75
  76 _DefaultReserved
  77    mov  r1, lr
  78    cps       #0x13                     ; Switch to SVC for common stack
  79    mov  r0, #5
  80    blx   SecCommonExceptionEntry
  81
  82 _DefaultIrq
  83    sub  r1, LR, #4
  84    cps       #0x13                     ; Switch to SVC for common stack
  85    mov  r0, #6
  86    blx   SecCommonExceptionEntry
  87
  88 _DefaultFiq
  89    sub  r1, LR, #4
  90    cps       #0x13                     ; Switch to SVC for common stack
  91    mov  r0, #7
  92    blx   SecCommonExceptionEntry
  93
  94   END