unicore32 core architecture: mm related: fault handling
This patch implements fault handling of memory management.
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/unicore32/mm/extable.c b/arch/unicore32/mm/extable.c
new file mode 100644
index 0000000..6564180
--- /dev/null
+++ b/arch/unicore32/mm/extable.c
@@ -0,0 +1,24 @@
+/*
+ * linux/arch/unicore32/mm/extable.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/uaccess.h>
+
+int fixup_exception(struct pt_regs *regs)
+{
+ const struct exception_table_entry *fixup;
+
+ fixup = search_exception_tables(instruction_pointer(regs));
+ if (fixup)
+ regs->UCreg_pc = fixup->fixup;
+
+ return fixup != NULL;
+}