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Project/Src/rt-thread/libcpu/mips/xburst/exception.c

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+/*
+ * File      : exception.c
+ * COPYRIGHT (C) 2008 - 2016, RT-Thread Development Team
+ *
+ *  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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ */
+#include <rtthread.h>
+#include <rthw.h>
+#include "../common/exception.h"
+#include "../common/mipsregs.h"
+
+/**
+ * @addtogroup Ingenic
+ */
+/*@{*/
+
+/**
+ * exception handle table
+ */
+exception_func_t sys_exception_handlers[33];
+
+/**
+ * setup the exception handle
+ */
+exception_func_t rt_set_except_vector(int n, exception_func_t func)
+{
+    exception_func_t old_handler = sys_exception_handlers[n];
+
+    if ((n == 0) || (n > 32) || (!func))
+    {
+        return 0;
+    }
+
+    sys_exception_handlers[n] = func;
+
+    return old_handler;
+}
+
+void tlb_refill_handler(void)
+{
+    rt_kprintf("tlb-miss happens, epc: 0x%08x\n", read_c0_epc());
+    rt_hw_cpu_shutdown();
+}
+
+void cache_error_handler(void)
+{
+    rt_kprintf("cache exception happens, epc: 0x%08x\n", read_c0_epc());
+    rt_hw_cpu_shutdown();
+}
+
+static void unhandled_exception_handle(pt_regs_t *regs)
+{
+    rt_kprintf("exception happens, epc: 0x%08x\n", regs->cp0_epc);
+}
+
+void install_default_execpt_handle(void)
+{
+    rt_int32_t i;
+
+    for (i=0; i<33; i++)
+        sys_exception_handlers[i] = (exception_func_t)unhandled_exception_handle;
+}
+
+/*@}*/
+