sh: Split out extable.c _32 and _64 variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile
index d35cacc..9f4bc3d 100644
--- a/arch/sh/mm/Makefile
+++ b/arch/sh/mm/Makefile
@@ -1,37 +1,5 @@
-#
-# Makefile for the Linux SuperH-specific parts of the memory manager.
-#
-
-obj-y := init.o extable.o consistent.o
-
-ifndef CONFIG_CACHE_OFF
-obj-$(CONFIG_CPU_SH2) += cache-sh2.o
-obj-$(CONFIG_CPU_SH3) += cache-sh3.o
-obj-$(CONFIG_CPU_SH4) += cache-sh4.o
-obj-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o
+ifeq ($(CONFIG_SUPERH32),y)
+include ${srctree}/arch/sh/mm/Makefile_32
+else
+include ${srctree}/arch/sh/mm/Makefile_64
endif
-
-mmu-y := tlb-nommu.o pg-nommu.o
-mmu-$(CONFIG_MMU) := fault.o clear_page.o copy_page.o tlb-flush.o \
- ioremap.o
-
-obj-y += $(mmu-y)
-
-ifdef CONFIG_DEBUG_FS
-obj-$(CONFIG_CPU_SH4) += cache-debugfs.o
-endif
-
-ifdef CONFIG_MMU
-obj-$(CONFIG_CPU_SH3) += tlb-sh3.o
-obj-$(CONFIG_CPU_SH4) += tlb-sh4.o
-ifndef CONFIG_CACHE_OFF
-obj-$(CONFIG_CPU_SH4) += pg-sh4.o
-obj-$(CONFIG_SH7705_CACHE_32KB) += pg-sh7705.o
-endif
-endif
-
-obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PMB) += pmb.o
-obj-$(CONFIG_NUMA) += numa.o
-
-EXTRA_CFLAGS += -Werror
diff --git a/arch/sh/mm/Makefile_32 b/arch/sh/mm/Makefile_32
new file mode 100644
index 0000000..cc68b26
--- /dev/null
+++ b/arch/sh/mm/Makefile_32
@@ -0,0 +1,37 @@
+#
+# Makefile for the Linux SuperH-specific parts of the memory manager.
+#
+
+obj-y := init.o extable_32.o consistent.o
+
+ifndef CONFIG_CACHE_OFF
+obj-$(CONFIG_CPU_SH2) += cache-sh2.o
+obj-$(CONFIG_CPU_SH3) += cache-sh3.o
+obj-$(CONFIG_CPU_SH4) += cache-sh4.o
+obj-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o
+endif
+
+mmu-y := tlb-nommu.o pg-nommu.o
+mmu-$(CONFIG_MMU) := fault.o clear_page.o copy_page.o tlb-flush.o \
+ ioremap.o
+
+obj-y += $(mmu-y)
+
+ifdef CONFIG_DEBUG_FS
+obj-$(CONFIG_CPU_SH4) += cache-debugfs.o
+endif
+
+ifdef CONFIG_MMU
+obj-$(CONFIG_CPU_SH3) += tlb-sh3.o
+obj-$(CONFIG_CPU_SH4) += tlb-sh4.o
+ifndef CONFIG_CACHE_OFF
+obj-$(CONFIG_CPU_SH4) += pg-sh4.o
+obj-$(CONFIG_SH7705_CACHE_32KB) += pg-sh7705.o
+endif
+endif
+
+obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
+obj-$(CONFIG_PMB) += pmb.o
+obj-$(CONFIG_NUMA) += numa.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/sh/mm/Makefile_64 b/arch/sh/mm/Makefile_64
new file mode 100644
index 0000000..de964a1
--- /dev/null
+++ b/arch/sh/mm/Makefile_64
@@ -0,0 +1,11 @@
+#
+# Makefile for the Linux SuperH-specific parts of the memory manager.
+#
+
+obj-y := init.o extable_64.o consistent.o
+
+obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
+obj-$(CONFIG_PMB) += pmb.o
+obj-$(CONFIG_NUMA) += numa.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/sh/mm/extable.c b/arch/sh/mm/extable_32.c
similarity index 100%
rename from arch/sh/mm/extable.c
rename to arch/sh/mm/extable_32.c
diff --git a/arch/sh/mm/extable_64.c b/arch/sh/mm/extable_64.c
new file mode 100644
index 0000000..a2e6e05
--- /dev/null
+++ b/arch/sh/mm/extable_64.c
@@ -0,0 +1,80 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * arch/sh64/mm/extable.c
+ *
+ * Copyright (C) 2003 Richard Curnow
+ * Copyright (C) 2003, 2004 Paul Mundt
+ *
+ * Cloned from the 2.5 SH version..
+ */
+#include <linux/rwsem.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+
+extern unsigned long copy_user_memcpy, copy_user_memcpy_end;
+extern void __copy_user_fixup(void);
+
+static const struct exception_table_entry __copy_user_fixup_ex = {
+ .fixup = (unsigned long)&__copy_user_fixup,
+};
+
+/* Some functions that may trap due to a bad user-mode address have too many loads
+ and stores in them to make it at all practical to label each one and put them all in
+ the main exception table.
+
+ In particular, the fast memcpy routine is like this. It's fix-up is just to fall back
+ to a slow byte-at-a-time copy, which is handled the conventional way. So it's functionally
+ OK to just handle any trap occurring in the fast memcpy with that fixup. */
+static const struct exception_table_entry *check_exception_ranges(unsigned long addr)
+{
+ if ((addr >= (unsigned long)©_user_memcpy) &&
+ (addr <= (unsigned long)©_user_memcpy_end))
+ return &__copy_user_fixup_ex;
+
+ return NULL;
+}
+
+/* Simple binary search */
+const struct exception_table_entry *
+search_extable(const struct exception_table_entry *first,
+ const struct exception_table_entry *last,
+ unsigned long value)
+{
+ const struct exception_table_entry *mid;
+
+ mid = check_exception_ranges(value);
+ if (mid)
+ return mid;
+
+ while (first <= last) {
+ long diff;
+
+ mid = (last - first) / 2 + first;
+ diff = mid->insn - value;
+ if (diff == 0)
+ return mid;
+ else if (diff < 0)
+ first = mid+1;
+ else
+ last = mid-1;
+ }
+
+ return NULL;
+}
+
+int fixup_exception(struct pt_regs *regs)
+{
+ const struct exception_table_entry *fixup;
+
+ fixup = search_exception_tables(regs->pc);
+ if (fixup) {
+ regs->pc = fixup->fixup;
+ return 1;
+ }
+
+ return 0;
+}
+