| /* |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc. |
| */ |
| |
| #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; |
| } __attribute__((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__ */ |