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