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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2014 Imagination Technologies
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __MIPS_ARCH_EXCEPTION_H__
#define __MIPS_ARCH_EXCEPTION_H__
#include <stdint.h>
void exception_init_asm(void);
void exception_dispatch(void);
struct exception_state_t {
struct {
/* Always 0: just to keep the series complete */
u32 zero;
/* Reserved for the assembler */
/* TODO: is this actually needed here? */
u32 at;
/* v0-v1: expression evaluation */
u32 v0;
u32 v1;
/* a0-a3: Arguments */
u32 a0;
u32 a1;
u32 a2;
u32 a3;
/* t0-t3: Temporary registers for expression evaluation */
u32 t0;
u32 t1;
u32 t2;
u32 t3;
u32 t4;
u32 t5;
u32 t6;
u32 t7;
/* s0-s7: Saved registers */
u32 s0;
u32 s1;
u32 s2;
u32 s3;
u32 s4;
u32 s5;
u32 s6;
u32 s7;
/* t8-t9: Temporary registers for expression evaluation */
u32 t8;
u32 t9;
/* k0-k1: reserved for SO kernel */
u32 k0;
u32 k1;
/* Global pointer */
u32 gp;
/* Stack pointer */
u32 sp;
/* Frame pointer */
u32 fp;
/* Return address */
u32 ra;
} regs;
u32 vector;
} __packed;
extern struct exception_state_t *exception_state_ptr;
extern u32 *exception_stack_end;
enum {
EXC_CACHE_ERROR = 0,
EXC_TLB_REFILL_AND_ALL = 1,
EXC_INTERRUPT = 2,
EXC_EJTAG_DEBUG = 3,
EXC_COUNT
};
#endif /* __MIPS_ARCH_EXCEPTION_H__ */
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