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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.

 */

#ifndef __mips32_EXCEPTION_H__

#define __mips32_EXCEPTION_H__

#ifndef __mips32_TYPES_H__

#  include <arch/types.h>

#endif

#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 {

	__u32 at;

	__u32 v0;

	__u32 v1;

	__u32 a0;

	__u32 a1;

	__u32 a2;

	__u32 a3;

	__u32 t0;

	__u32 t1;

	__u32 t2;

	__u32 t3;

	__u32 t4;

	__u32 t5;

	__u32 t6;

	__u32 t7;

	__u32 s0;

	__u32 s1;

	__u32 s2;

	__u32 s3;

	__u32 s4;

	__u32 s5;

	__u32 s6;

	__u32 s7;

	__u32 t8;

	__u32 t9;

	__u32 gp;

	__u32 sp;

	__u32 s8;

	__u32 ra;

	__u32 lo;

	__u32 hi;

	__u32 status; /* cp0_status */

	__u32 epc; /* cp0_epc */

	__u32 k1; /* We use it as thread-local pointer */

};

static inline void istate_set_retaddr(istate_t *istate, __address 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 __native 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