sh: nommu: use 32-bit phys mode.

The nommu code has regressed somewhat in that 29BIT gets set for the
SH-2/2A configs regardless of the fact that they are really 32BIT sans
MMU or PMB. This does a bit of tidying to get nommu properly selecting
32BIT as it was before.

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

3 files changed, 9 insertions, 10 deletions

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 09370392aff1..c3e61b366493 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -79,7 +79,7 @@ config 29BIT
 
 config 32BIT
         bool
-        default y if CPU_SH5
+        default y if CPU_SH5 || !MMU
 
 config PMB
         bool "Support 32-bit physical addressing through PMB"
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 038793286990..40733a952402 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -79,21 +79,20 @@ void dma_generic_free_coherent(struct device *dev, size_t size,
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
                     enum dma_data_direction direction)
 {
-#if defined(CONFIG_CPU_SH5) || defined(CONFIG_PMB)
-        void *p1addr = vaddr;
-#else
-        void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
-#endif
+        void *addr;
+
+        addr = __in_29bit_mode() ?
+               (void *)P1SEGADDR((unsigned long)vaddr) : vaddr;
 
         switch (direction) {
         case DMA_FROM_DEVICE:           /* invalidate only */
-                __flush_invalidate_region(p1addr, size);
+                __flush_invalidate_region(addr, size);
                 break;
         case DMA_TO_DEVICE:             /* writeback only */
-                __flush_wback_region(p1addr, size);
+                __flush_wback_region(addr, size);
                 break;
         case DMA_BIDIRECTIONAL:         /* writeback and invalidate */
-                __flush_purge_region(p1addr, size);
+                __flush_purge_region(addr, size);
                 break;
         default:
                 BUG();
diff --git a/arch/sh/mm/uncached.c b/arch/sh/mm/uncached.c
index 8a4eca551fc0..a7767da815e9 100644
--- a/arch/sh/mm/uncached.c
+++ b/arch/sh/mm/uncached.c
@@ -28,7 +28,7 @@ EXPORT_SYMBOL(virt_addr_uncached);
 
 void __init uncached_init(void)
 {
-#ifdef CONFIG_29BIT
+#if defined(CONFIG_29BIT) || !defined(CONFIG_MMU)
         uncached_start = P2SEG;
 #else
         uncached_start = memory_end;