kernel/arch/mips32/include/exception.h

   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 KERN_mips32_EXCEPTION_H_
  36 #define KERN_mips32_EXCEPTION_H_
  37
  38 #include <arch/types.h>
  39 #include <typedefs.h>
  40 #include <arch/cp0.h>
  41
  42 #define EXC_Int         0
  43 #define EXC_Mod         1
  44 #define EXC_TLBL        2
  45 #define EXC_TLBS        3
  46 #define EXC_AdEL        4
  47 #define EXC_AdES        5
  48 #define EXC_IBE         6
  49 #define EXC_DBE         7
  50 #define EXC_Sys         8
  51 #define EXC_Bp          9
  52 #define EXC_RI          10
  53 #define EXC_CpU         11
  54 #define EXC_Ov          12
  55 #define EXC_Tr          13
  56 #define EXC_VCEI        14
  57 #define EXC_FPE         15
  58 #define EXC_WATCH       23
  59 #define EXC_VCED        31
  60
  61 struct istate {
  62         uint32_t at;
  63         uint32_t v0;
  64         uint32_t v1;
  65         uint32_t a0;
  66         uint32_t a1;
  67         uint32_t a2;
  68         uint32_t a3;
  69         uint32_t t0;
  70         uint32_t t1;
  71         uint32_t t2;
  72         uint32_t t3;
  73         uint32_t t4;
  74         uint32_t t5;
  75         uint32_t t6;
  76         uint32_t t7;
  77         uint32_t s0;
  78         uint32_t s1;
  79         uint32_t s2;
  80         uint32_t s3;
  81         uint32_t s4;
  82         uint32_t s5;
  83         uint32_t s6;
  84         uint32_t s7;
  85         uint32_t t8;
  86         uint32_t t9;
  87         uint32_t gp;
  88         uint32_t sp;
  89         uint32_t s8;
  90         uint32_t ra;
  91
  92         uint32_t lo;
  93         uint32_t hi;
  94
  95         uint32_t status; /* cp0_status */
  96         uint32_t epc; /* cp0_epc */
  97         uint32_t k1; /* We use it as thread-local pointer */
  98 };
  99
 100 static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
 101 {
 102         istate->epc = retaddr;
 103 }
 104
 105 /** Return true if exception happened while in userspace */
 106 static inline int istate_from_uspace(istate_t *istate)
 107 {
 108         return istate->status & cp0_status_um_bit;
 109 }
 110 static inline unative_t istate_get_pc(istate_t *istate)
 111 {
 112         return istate->epc;
 113 }
 114
 115 extern void exception(istate_t *istate);
 116 extern void tlb_refill_entry(void);
 117 extern void exception_entry(void);
 118 extern void cache_error_entry(void);
 119 extern void exception_init(void);
 120
 121 #endif
 122
 123 /** @}
 124  */