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  1. /*
  2.  * Copyright (c) 2007 Pavel Jancik, Michal Kebrt
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup arm32mm
  30.  * @{
  31.  */
  32. /** @file
  33.  *  @brief Page fault related declarations.
  34.  */
  35. #ifndef KERN_arm32_PAGE_FAULT_H_
  36. #define KERN_arm32_PAGE_FAULT_H
  37.  
  38. #include <arch/types.h>
  39.  
  40.  
  41. /** Decribes CP15 "fault status register" (FSR). */
  42. typedef struct {
  43.     unsigned status           : 3;
  44.     unsigned domain           : 4;
  45.     unsigned zero             : 1;
  46.     unsigned should_be_zero   : 24;
  47. } __attribute__ ((packed)) fault_status_t;
  48.  
  49.  
  50. /** Help union used for casting integer value into #fault_status_t. */
  51. typedef union {
  52.     fault_status_t    fs;
  53.     uint32_t          dummy;
  54. } fault_status_union_t;
  55.  
  56.  
  57. /** Simplified description of instruction code.
  58.  *
  59.  * @note Used for recognizing memory access instructions.
  60.  * @see ARM architecture reference (chapter 3.1)
  61.  */
  62. typedef struct {
  63.     unsigned dummy1        : 4;
  64.     unsigned bit4          : 1;
  65.     unsigned bits567       : 3;
  66.     unsigned dummy         : 12;
  67.     unsigned access        : 1;
  68.     unsigned opcode        : 4;
  69.     unsigned type          : 3;
  70.     unsigned condition     : 4;
  71. } __attribute__ ((packed)) instruction_t;
  72.  
  73.  
  74. /** Help union used for casting pc register (uint_32_t) value into
  75.  *  #instruction_t pointer.
  76.  */
  77. typedef union {
  78.     instruction_t*   instr;
  79.     uint32_t         pc;
  80. } instruction_union_t;
  81.  
  82.  
  83. extern void prefetch_abort(int n, istate_t *istate);
  84. extern void data_abort(int n, istate_t *istate);
  85.  
  86.  
  87. #endif
  88.  
  89. /** @}
  90.  */
  91.  
  92.