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  1. /*
  2.  * Copyright (C) 2003-2004 Jakub Jermar
  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 mips32 
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef __mips32_EXCEPTION_H__
  36. #define __mips32_EXCEPTION_H__
  37.  
  38. #ifndef __mips32_TYPES_H__
  39. #  include <arch/types.h>
  40. #endif
  41.  
  42. #include <typedefs.h>
  43. #include <arch/cp0.h>
  44.  
  45. #define EXC_Int     0
  46. #define EXC_Mod     1
  47. #define EXC_TLBL    2
  48. #define EXC_TLBS    3
  49. #define EXC_AdEL    4
  50. #define EXC_AdES    5
  51. #define EXC_IBE     6
  52. #define EXC_DBE     7
  53. #define EXC_Sys     8
  54. #define EXC_Bp      9
  55. #define EXC_RI      10
  56. #define EXC_CpU     11
  57. #define EXC_Ov      12
  58. #define EXC_Tr      13
  59. #define EXC_VCEI    14
  60. #define EXC_FPE     15
  61. #define EXC_WATCH   23
  62. #define EXC_VCED    31
  63.  
  64. struct istate {
  65.     uint32_t at;
  66.     uint32_t v0;
  67.     uint32_t v1;
  68.     uint32_t a0;
  69.     uint32_t a1;
  70.     uint32_t a2;
  71.     uint32_t a3;
  72.     uint32_t t0;
  73.     uint32_t t1;
  74.     uint32_t t2;
  75.     uint32_t t3;
  76.     uint32_t t4;
  77.     uint32_t t5;
  78.     uint32_t t6;
  79.     uint32_t t7;
  80.     uint32_t s0;
  81.     uint32_t s1;
  82.     uint32_t s2;
  83.     uint32_t s3;
  84.     uint32_t s4;
  85.     uint32_t s5;
  86.     uint32_t s6;
  87.     uint32_t s7;
  88.     uint32_t t8;
  89.     uint32_t t9;
  90.     uint32_t gp;
  91.     uint32_t sp;
  92.     uint32_t s8;
  93.     uint32_t ra;
  94.    
  95.     uint32_t lo;
  96.     uint32_t hi;
  97.  
  98.     uint32_t status; /* cp0_status */
  99.     uint32_t epc; /* cp0_epc */
  100.     uint32_t k1; /* We use it as thread-local pointer */
  101. };
  102.  
  103. static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
  104. {
  105.     istate->epc = retaddr;
  106. }
  107.  
  108. /** Return true if exception happened while in userspace */
  109. static inline int istate_from_uspace(istate_t *istate)
  110. {
  111.     return istate->status & cp0_status_um_bit;
  112. }
  113. static inline unative_t istate_get_pc(istate_t *istate)
  114. {
  115.     return istate->epc;
  116. }
  117.  
  118. extern void exception(istate_t *istate);
  119. extern void tlb_refill_entry(void);
  120. extern void exception_entry(void);
  121. extern void cache_error_entry(void);
  122. extern void exception_init(void);
  123.  
  124. #endif
  125.  
  126. /** @}
  127.  */
  128.