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/*

 * Copyright (c) 2003-2004 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/** @addtogroup mips32 

 * @{

 */

/** @file

 */

#ifndef KERN_mips32_EXCEPTION_H_

#define KERN_mips32_EXCEPTION_H_

#include <arch/types.h>

#include <typedefs.h>

#include <arch/cp0.h>

#define EXC_Int     0

#define EXC_Mod     1

#define EXC_TLBL    2

#define EXC_TLBS    3

#define EXC_AdEL    4

#define EXC_AdES    5

#define EXC_IBE     6

#define EXC_DBE     7

#define EXC_Sys     8

#define EXC_Bp      9

#define EXC_RI      10

#define EXC_CpU     11

#define EXC_Ov      12

#define EXC_Tr      13

#define EXC_VCEI    14

#define EXC_FPE     15

#define EXC_WATCH   23

#define EXC_VCED    31

struct istate {

    uint32_t at;

    uint32_t v0;

    uint32_t v1;

    uint32_t a0;

    uint32_t a1;

    uint32_t a2;

    uint32_t a3;

    uint32_t t0;

    uint32_t t1;

    uint32_t t2;

    uint32_t t3;

    uint32_t t4;

    uint32_t t5;

    uint32_t t6;

    uint32_t t7;

    uint32_t s0;

    uint32_t s1;

    uint32_t s2;

    uint32_t s3;

    uint32_t s4;

    uint32_t s5;

    uint32_t s6;

    uint32_t s7;

    uint32_t t8;

    uint32_t t9;

    uint32_t gp;

    uint32_t sp;

    uint32_t s8;

    uint32_t ra;

    uint32_t lo;

    uint32_t hi;

    uint32_t status; /* cp0_status */

    uint32_t epc; /* cp0_epc */

    uint32_t k1; /* We use it as thread-local pointer */

};

static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)

{

    istate->epc = retaddr;

}

/** Return true if exception happened while in userspace */

static inline int istate_from_uspace(istate_t *istate)

{

    return istate->status & cp0_status_um_bit;

}

static inline unative_t istate_get_pc(istate_t *istate)

{

    return istate->epc;

}

extern void exception(istate_t *istate);

extern void tlb_refill_entry(void);

extern void exception_entry(void);

extern void cache_error_entry(void);

extern void exception_init(void);

#endif

/** @}

 */