sh: Prepare for dynamic PMB support
To allow the MMU to be switched between 29bit and 32bit mode at runtime
some constants need to swapped for functions that return a runtime
value.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h
index 4f3efa7..5dff578 100644
--- a/arch/sh/include/asm/pgtable.h
+++ b/arch/sh/include/asm/pgtable.h
@@ -75,13 +75,31 @@
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
#define FIRST_USER_ADDRESS 0
-#ifdef CONFIG_32BIT
-#define PHYS_ADDR_MASK 0xffffffff
+#define PHYS_ADDR_MASK29 0x1fffffff
+#define PHYS_ADDR_MASK32 0xffffffff
+
+#ifdef CONFIG_PMB
+static inline unsigned long phys_addr_mask(void)
+{
+ /* Is the MMU in 29bit mode? */
+ if (__in_29bit_mode())
+ return PHYS_ADDR_MASK29;
+
+ return PHYS_ADDR_MASK32;
+}
+#elif CONFIG_32BIT
+static inline unsigned long phys_addr_mask(void)
+{
+ return PHYS_ADDR_MASK32;
+}
#else
-#define PHYS_ADDR_MASK 0x1fffffff
+static inline unsigned long phys_addr_mask(void)
+{
+ return PHYS_ADDR_MASK29;
+}
#endif
-#define PTE_PHYS_MASK (PHYS_ADDR_MASK & PAGE_MASK)
+#define PTE_PHYS_MASK (phys_addr_mask() & PAGE_MASK)
#define PTE_FLAGS_MASK (~(PTE_PHYS_MASK) << PAGE_SHIFT)
#ifdef CONFIG_SUPERH32