sh: Split out 29-bit and 32-bit physical mode definitions.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/mm/Kconfig

@@ -46,9 +46,20 @@ config MEMORY_SIZE
 	  as 0x00400000 which was the default value before this became
 	  configurable.
 
+# Physical addressing modes
+
+config 29BIT
+	def_bool !32BIT
+	depends on SUPERH32
+
 config 32BIT
+	bool
+	default y if CPU_SH5
+
+config PMB
 	bool "Support 32-bit physical addressing through PMB"
 	depends on MMU && (CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785)
+	select 32BIT
 	default y
 	help
 	  If you say Y here, physical addressing will be extended to

arch/sh/mm/Makefile

@@ -31,7 +31,7 @@ endif
 endif
 
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
-obj-$(CONFIG_32BIT)		+= pmb.o
+obj-$(CONFIG_PMB)		+= pmb.o
 obj-$(CONFIG_NUMA)		+= numa.o
 
 EXTRA_CFLAGS += -Werror

include/asm-sh/pgtable.h

@@ -28,6 +28,23 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
 
 #endif /* !__ASSEMBLY__ */
 
+/*
+ * Effective and physical address definitions, to aid with sign
+ * extension.
+ */
+#define NEFF		32
+#define	NEFF_SIGN	(1LL << (NEFF - 1))
+#define	NEFF_MASK	(-1LL << NEFF)
+
+#ifdef CONFIG_29BIT
+#define NPHYS		29
+#else
+#define NPHYS		32
+#endif
+
+#define	NPHYS_SIGN	(1LL << (NPHYS - 1))
+#define	NPHYS_MASK	(-1LL << NPHYS)
+
 /*
  * traditional two-level paging structure
  */