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1 jermar 1
/*
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 * Copyright (c) 2003-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup mips32 
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 * @{
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 */
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/** @file
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 */
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#ifndef KERN_mips32_EXCEPTION_H_
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#define KERN_mips32_EXCEPTION_H_
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#include <arch/types.h>
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#include <arch/cp0.h>
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#define EXC_Int     0
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#define EXC_Mod     1
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#define EXC_TLBL    2
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#define EXC_TLBS    3
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#define EXC_AdEL    4
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#define EXC_AdES    5
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#define EXC_IBE     6
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#define EXC_DBE     7
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#define EXC_Sys     8
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#define EXC_Bp      9
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#define EXC_RI      10
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#define EXC_CpU     11
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#define EXC_Ov      12
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#define EXC_Tr      13
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#define EXC_VCEI    14
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#define EXC_FPE     15
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#define EXC_WATCH   23
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#define EXC_VCED    31
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typedef struct {
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    uint32_t at;
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    uint32_t v0;
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    uint32_t v1;
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    uint32_t a0;
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    uint32_t a1;
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    uint32_t a2;
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    uint32_t a3;
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    uint32_t t0;
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    uint32_t t1;
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    uint32_t t2;
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    uint32_t t3;
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    uint32_t t4;
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    uint32_t t5;
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    uint32_t t6;
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    uint32_t t7;
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    uint32_t t8;
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    uint32_t t9;
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    uint32_t gp;
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    uint32_t sp;
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    uint32_t ra;
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    uint32_t lo;
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    uint32_t hi;
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    uint32_t status; /* cp0_status */
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    uint32_t epc; /* cp0_epc */
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    uint32_t k1; /* We use it as thread-local pointer */
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} istate_t;
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static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
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{
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    istate->epc = retaddr;
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}
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/** Return true if exception happened while in userspace */
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static inline int istate_from_uspace(istate_t *istate)
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{
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    return istate->status & cp0_status_um_bit;
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}
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static inline unative_t istate_get_pc(istate_t *istate)
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{
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    return istate->epc;
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}
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extern void exception(istate_t *istate);
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extern void tlb_refill_entry(void);
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extern void exception_entry(void);
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extern void cache_error_entry(void);
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extern void exception_init(void);
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#endif
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/** @}
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 */