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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. #ifndef __mips32_EXCEPTION_H__
  30. #define __mips32_EXCEPTION_H__
  31.  
  32. #ifndef __mips32_TYPES_H__
  33. #  include <arch/types.h>
  34. #endif
  35.  
  36. #include <typedefs.h>
  37. #include <arch/cp0.h>
  38.  
  39. #define EXC_Int     0
  40. #define EXC_Mod     1
  41. #define EXC_TLBL    2
  42. #define EXC_TLBS    3
  43. #define EXC_AdEL    4
  44. #define EXC_AdES    5
  45. #define EXC_IBE     6
  46. #define EXC_DBE     7
  47. #define EXC_Sys     8
  48. #define EXC_Bp      9
  49. #define EXC_RI      10
  50. #define EXC_CpU     11
  51. #define EXC_Ov      12
  52. #define EXC_Tr      13
  53. #define EXC_VCEI    14
  54. #define EXC_FPE     15
  55. #define EXC_WATCH   23
  56. #define EXC_VCED    31
  57.  
  58. struct istate {
  59.     __u32 at;
  60.     __u32 v0;
  61.     __u32 v1;
  62.     __u32 a0;
  63.     __u32 a1;
  64.     __u32 a2;
  65.     __u32 a3;
  66.     __u32 t0;
  67.     __u32 t1;
  68.     __u32 t2;
  69.     __u32 t3;
  70.     __u32 t4;
  71.     __u32 t5;
  72.     __u32 t6;
  73.     __u32 t7;
  74.     __u32 s0;
  75.     __u32 s1;
  76.     __u32 s2;
  77.     __u32 s3;
  78.     __u32 s4;
  79.     __u32 s5;
  80.     __u32 s6;
  81.     __u32 s7;
  82.     __u32 t8;
  83.     __u32 t9;
  84.     __u32 gp;
  85.     __u32 sp;
  86.     __u32 s8;
  87.     __u32 ra;
  88.    
  89.     __u32 lo;
  90.     __u32 hi;
  91.  
  92.     __u32 status; /* cp0_status */
  93.     __u32 epc; /* cp0_epc */
  94.     __u32 k1; /* We use it as thread-local pointer */
  95. };
  96.  
  97. static inline void istate_set_retaddr(istate_t *istate, __address retaddr)
  98. {
  99.     istate->epc = retaddr;
  100. }
  101.  
  102. /** Return true if exception happened while in userspace */
  103. static inline int istate_from_uspace(istate_t *istate)
  104. {
  105.     return istate->status & cp0_status_um_bit;
  106. }
  107. static inline __native istate_get_pc(istate_t *istate)
  108. {
  109.     return istate->epc;
  110. }
  111.  
  112. extern void exception(istate_t *istate);
  113. extern void tlb_refill_entry(void);
  114. extern void exception_entry(void);
  115. extern void cache_error_entry(void);
  116. extern void exception_init(void);
  117.  
  118. #endif
  119.