1*10465441SEvalZero /*
2*10465441SEvalZero * File : exception.c
3*10465441SEvalZero * COPYRIGHT (C) 2008 - 2016, RT-Thread Development Team
4*10465441SEvalZero *
5*10465441SEvalZero * This program is free software; you can redistribute it and/or modify
6*10465441SEvalZero * it under the terms of the GNU General Public License as published by
7*10465441SEvalZero * the Free Software Foundation; either version 2 of the License, or
8*10465441SEvalZero * (at your option) any later version.
9*10465441SEvalZero *
10*10465441SEvalZero * This program is distributed in the hope that it will be useful,
11*10465441SEvalZero * but WITHOUT ANY WARRANTY; without even the implied warranty of
12*10465441SEvalZero * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13*10465441SEvalZero * GNU General Public License for more details.
14*10465441SEvalZero *
15*10465441SEvalZero * You should have received a copy of the GNU General Public License along
16*10465441SEvalZero * with this program; if not, write to the Free Software Foundation, Inc.,
17*10465441SEvalZero * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18*10465441SEvalZero *
19*10465441SEvalZero * Change Logs:
20*10465441SEvalZero * Date Author Notes
21*10465441SEvalZero * 2010-05-17 swkyer first version
22*10465441SEvalZero */
23*10465441SEvalZero #include <rtthread.h>
24*10465441SEvalZero #include <rthw.h>
25*10465441SEvalZero #include "../common/exception.h"
26*10465441SEvalZero #include "../common/mipsregs.h"
27*10465441SEvalZero
28*10465441SEvalZero /**
29*10465441SEvalZero * @addtogroup Ingenic
30*10465441SEvalZero */
31*10465441SEvalZero /*@{*/
32*10465441SEvalZero
33*10465441SEvalZero /**
34*10465441SEvalZero * exception handle table
35*10465441SEvalZero */
36*10465441SEvalZero exception_func_t sys_exception_handlers[33];
37*10465441SEvalZero
38*10465441SEvalZero /**
39*10465441SEvalZero * setup the exception handle
40*10465441SEvalZero */
rt_set_except_vector(int n,exception_func_t func)41*10465441SEvalZero exception_func_t rt_set_except_vector(int n, exception_func_t func)
42*10465441SEvalZero {
43*10465441SEvalZero exception_func_t old_handler = sys_exception_handlers[n];
44*10465441SEvalZero
45*10465441SEvalZero if ((n == 0) || (n > 32) || (!func))
46*10465441SEvalZero {
47*10465441SEvalZero return 0;
48*10465441SEvalZero }
49*10465441SEvalZero
50*10465441SEvalZero sys_exception_handlers[n] = func;
51*10465441SEvalZero
52*10465441SEvalZero return old_handler;
53*10465441SEvalZero }
54*10465441SEvalZero
tlb_refill_handler(void)55*10465441SEvalZero void tlb_refill_handler(void)
56*10465441SEvalZero {
57*10465441SEvalZero rt_kprintf("tlb-miss happens, epc: 0x%08x\n", read_c0_epc());
58*10465441SEvalZero rt_hw_cpu_shutdown();
59*10465441SEvalZero }
60*10465441SEvalZero
cache_error_handler(void)61*10465441SEvalZero void cache_error_handler(void)
62*10465441SEvalZero {
63*10465441SEvalZero rt_kprintf("cache exception happens, epc: 0x%08x\n", read_c0_epc());
64*10465441SEvalZero rt_hw_cpu_shutdown();
65*10465441SEvalZero }
66*10465441SEvalZero
unhandled_exception_handle(pt_regs_t * regs)67*10465441SEvalZero static void unhandled_exception_handle(pt_regs_t *regs)
68*10465441SEvalZero {
69*10465441SEvalZero rt_kprintf("exception happens, epc: 0x%08x\n", regs->cp0_epc);
70*10465441SEvalZero }
71*10465441SEvalZero
install_default_execpt_handle(void)72*10465441SEvalZero void install_default_execpt_handle(void)
73*10465441SEvalZero {
74*10465441SEvalZero rt_int32_t i;
75*10465441SEvalZero
76*10465441SEvalZero for (i=0; i<33; i++)
77*10465441SEvalZero sys_exception_handlers[i] = (exception_func_t)unhandled_exception_handle;
78*10465441SEvalZero }
79*10465441SEvalZero
80*10465441SEvalZero /*@}*/
81*10465441SEvalZero
82