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  1. /*
  2.  * Copyright (c) 2007 Michal Kebrt, Petr Stepan
  3.  *
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup arm32  
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #ifndef KERN_arm32_EXCEPTION_H_
  37. #define KERN_arm32_EXCEPTION_H_
  38.  
  39. #include <arch/types.h>
  40. #include <arch/regutils.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. typedef struct {
  69.     uint32_t spsr;
  70.     uint32_t sp;
  71.     uint32_t lr;
  72.  
  73.     uint32_t r0;
  74.     uint32_t r1;
  75.     uint32_t r2;
  76.     uint32_t r3;
  77.     uint32_t r4;
  78.     uint32_t r5;
  79.     uint32_t r6;
  80.     uint32_t r7;
  81.     uint32_t r8;
  82.     uint32_t r9;
  83.     uint32_t r10;
  84.     uint32_t r11;
  85.     uint32_t r12;
  86.  
  87.     uint32_t pc;
  88. } istate_t;
  89.  
  90.  
  91.  
  92. static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
  93. {
  94.     istate->pc = retaddr;
  95. }
  96.  
  97. /** Return true if exception happened while in userspace */
  98. static inline int istate_from_uspace(istate_t *istate)
  99. {
  100.     return (istate->spsr & STATUS_REG_MODE_MASK) == USER_MODE;
  101. }
  102. static inline unative_t istate_get_pc(istate_t *istate)
  103. {
  104.     return istate->pc;
  105. }
  106.  
  107. extern void setup_exception_stacks(void);
  108. extern void install_exception_handlers(void);
  109. extern void exception_init(void);
  110. extern void print_istate(istate_t *istate);
  111.  
  112. #endif
  113.  
  114. /** @}
  115.  */
  116.