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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. #define HIGH_EXCEPTION_VECTORS
  43.  
  44. #ifdef HIGH_EXCEPTION_VECTORS
  45.     #define EXC_BASE_ADDRESS    0xffff0000
  46. #else
  47.     #define EXC_BASE_ADDRESS    0x0
  48. #endif
  49.  
  50. /* Exception Vectors */
  51. #define EXC_RESET_VEC       EXC_BASE_ADDRESS + 0x0
  52. #define EXC_UNDEF_INSTR_VEC EXC_BASE_ADDRESS + 0x4
  53. #define EXC_SWI_VEC     EXC_BASE_ADDRESS + 0x8
  54. #define EXC_PREFETCH_ABORT_VEC  EXC_BASE_ADDRESS + 0xc
  55. #define EXC_DATA_ABORT_VEC  EXC_BASE_ADDRESS + 0x10
  56. #define EXC_IRQ_VEC     EXC_BASE_ADDRESS + 0x18
  57. #define EXC_FIQ_VEC     EXC_BASE_ADDRESS + 0x1c
  58.  
  59. /* Exception numbers */
  60. #define EXC_RESET       0
  61. #define EXC_UNDEF_INSTR     1
  62. #define EXC_SWI         2
  63. #define EXC_PREFETCH_ABORT  3
  64. #define EXC_DATA_ABORT      4
  65. #define EXC_IRQ         5
  66. #define EXC_FIQ         6
  67.  
  68.  
  69.  
  70. typedef struct {
  71.     uint32_t r0;
  72.     uint32_t r1;
  73.     uint32_t r2;
  74.     uint32_t r3;
  75.     uint32_t r4;
  76.     uint32_t r5;
  77.     uint32_t r6;
  78.     uint32_t r7;
  79.     uint32_t r8;
  80.     uint32_t r9;
  81.     uint32_t r10;
  82.     uint32_t r11;
  83.     uint32_t r12;
  84.     uint32_t sp;
  85.     uint32_t lr;
  86.  
  87.     uint32_t spsr;
  88. } istate_t;
  89.  
  90. static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
  91. {
  92.     istate->lr = retaddr;
  93. }
  94.  
  95. /** Return true if exception happened while in userspace */
  96. static inline int istate_from_uspace(istate_t *istate)
  97. {
  98.     return !(istate->lr & 0x80000000);
  99.     return 0;
  100. }
  101. static inline unative_t istate_get_pc(istate_t *istate)
  102. {
  103.     return istate->lr;
  104. }
  105.  
  106. extern void setup_exception_stacks(void);
  107. extern void install_exception_handlers(void);
  108. extern void exception_init(void);
  109.  
  110. #endif
  111.  
  112. /** @}
  113.  */
  114.