3 files changed, 29 insertions, 1 deletions

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index a7bbc2cbbf8c..8192c872a69a 100644
--- a/arch/sh/mm/Kconfig
+++ b/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
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile
index aa44607f072d..d35caccd0aaa 100644
--- a/arch/sh/mm/Makefile
+++ b/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
diff --git a/include/asm-sh/pgtable.h b/include/asm-sh/pgtable.h
index 8f1e8be8d15d..6ab3ba82d255 100644
--- a/include/asm-sh/pgtable.h
+++ b/include/asm-sh/pgtable.h
@@ -29,6 +29,23 @@ 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
  */
 /* PTE bits */