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>

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 5c075f562ebae912476974f20faee1bfaeec707d..7f217b3a50a806b7347f991b588397011aa3388e 100644 (file)
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -193,6 +193,7 @@ config CPU_SH2
 config CPU_SH2A
        bool
        select CPU_SH2
+       select UNCACHED_MAPPING
 
 config CPU_SH3
        bool

diff --git a/arch/sh/include/asm/addrspace.h b/arch/sh/include/asm/addrspace.h
index 446b3831c2149380265476f47674d4ad4ea72b1e..3d1ae2bfaa6fd7056701e8ddc41538d94a4a1a71 100644 (file)
--- a/arch/sh/include/asm/addrspace.h
+++ b/arch/sh/include/asm/addrspace.h
@@ -44,10 +44,10 @@
 /*
  * These will never work in 32-bit, don't even bother.
  */
-#define P1SEGADDR(a)   __futile_remapping_attempt
-#define P2SEGADDR(a)   __futile_remapping_attempt
-#define P3SEGADDR(a)   __futile_remapping_attempt
-#define P4SEGADDR(a)   __futile_remapping_attempt
+#define P1SEGADDR(a)   ({ (void)(a); BUG(); NULL; })
+#define P2SEGADDR(a)   ({ (void)(a); BUG(); NULL; })
+#define P3SEGADDR(a)   ({ (void)(a); BUG(); NULL; })
+#define P4SEGADDR(a)   ({ (void)(a); BUG(); NULL; })
 #endif
 #endif /* P1SEG */
 

diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 09370392aff15d791d612ac57bcdf0c6031d8443..c3e61b36649380f5db818c5f6edb05bfc897de1c 100644 (file)
--- 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 0387932869904a042472cca19b65141b5b8bdc9f..40733a9524021d42d42ddc5a8d7e08ef77a1c155 100644 (file)
--- 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 8a4eca551fc0a08542085faddeac7af373ad091b..a7767da815e91453c5b5526a05f4c72405e4afba 100644 (file)
--- 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;