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  1. /*
  2.  * Copyright (c) 2007 Michal Kebrt
  3.  * Copyright (c) 2007 Petr Stepan
  4.  *
  5.  * All rights reserved.
  6.  *
  7.  * Redistribution and use in source and binary forms, with or without
  8.  * modification, are permitted provided that the following conditions
  9.  * are met:
  10.  *
  11.  * - Redistributions of source code must retain the above copyright
  12.  *   notice, this list of conditions and the following disclaimer.
  13.  * - Redistributions in binary form must reproduce the above copyright
  14.  *   notice, this list of conditions and the following disclaimer in the
  15.  *   documentation and/or other materials provided with the distribution.
  16.  * - The name of the author may not be used to endorse or promote products
  17.  *   derived from this software without specific prior written permission.
  18.  *
  19.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29.  */
  30.  
  31. /** @addtogroup arm32  
  32.  * @{
  33.  */
  34. /** @file
  35.  */
  36.  
  37. #ifndef KERN_arm32_EXCEPTION_H_
  38. #define KERN_arm32_EXCEPTION_H_
  39.  
  40. #include <arch/types.h>
  41.  
  42. /* Exception Vectors */
  43. #define EXC_RESET_VEC       0x0
  44. #define EXC_UNDEF_INSTR_VEC 0x4
  45. #define EXC_SWI_VEC     0x8
  46. #define EXC_PREFETCH_ABORT_VEC  0xc
  47. #define EXC_DATA_ABORT_VEC  0x10
  48. #define EXC_IRQ_VEC     0x18
  49. #define EXC_FIQ_VEC     0x1c
  50.  
  51. typedef struct {
  52.    
  53.     uint32_t cpsr;
  54.     uint32_t retaddr;
  55.  
  56.     uint32_t r0;
  57.     uint32_t r1;
  58.     uint32_t r2;
  59.     uint32_t r3;
  60.     uint32_t r4;
  61.     uint32_t r5;
  62.     uint32_t r6;
  63.     uint32_t r7;
  64.     uint32_t r8;
  65.     uint32_t r10;
  66.     uint32_t r11;
  67.     uint32_t r12;
  68.     uint32_t sp;
  69.     uint32_t lr;
  70.  
  71. } istate_t;
  72.  
  73. static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
  74. {
  75.     istate->retaddr = retaddr;
  76. }
  77.  
  78. /** Return true if exception happened while in userspace */
  79. static inline int istate_from_uspace(istate_t *istate)
  80. {
  81.     return !(istate->retaddr & 0x80000000);
  82. }
  83. static inline unative_t istate_get_pc(istate_t *istate)
  84. {
  85.     return istate->retaddr;
  86. }
  87.  
  88.  
  89. extern void install_exception_handlers(void);
  90. extern void exception_init(void);
  91.  
  92. #endif
  93.  
  94. /** @}
  95.  */
  96.