Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild

[linux-2.6-omap-h63xx.git] / include / asm-sh / cacheflush.h

diff --git a/include/asm-sh/cacheflush.h b/include/asm-sh/cacheflush.h
index 22f12634975b7b350cca273601227cf38a6d0fc1..aa558da084715874d5169f5b3a58863db83849ee 100644 (file)
--- a/include/asm-sh/cacheflush.h
+++ b/include/asm-sh/cacheflush.h
@@ -1,16 +1,47 @@
 #ifndef __ASM_SH_CACHEFLUSH_H
 #define __ASM_SH_CACHEFLUSH_H
+
 #ifdef __KERNEL__
 
-#include <linux/mm.h>
+#ifdef CONFIG_CACHE_OFF
+/*
+ * Nothing to do when the cache is disabled, initial flush and explicit
+ * disabling is handled at CPU init time.
+ *
+ * See arch/sh/kernel/cpu/init.c:cache_init().
+ */
+#define p3_cache_init()                                do { } while (0)
+#define flush_cache_all()                      do { } while (0)
+#define flush_cache_mm(mm)                     do { } while (0)
+#define flush_cache_dup_mm(mm)                 do { } while (0)
+#define flush_cache_range(vma, start, end)     do { } while (0)
+#define flush_cache_page(vma, vmaddr, pfn)     do { } while (0)
+#define flush_dcache_page(page)                        do { } while (0)
+#define flush_icache_range(start, end)         do { } while (0)
+#define flush_icache_page(vma,pg)              do { } while (0)
+#define flush_dcache_mmap_lock(mapping)                do { } while (0)
+#define flush_dcache_mmap_unlock(mapping)      do { } while (0)
+#define flush_cache_sigtramp(vaddr)            do { } while (0)
+#define flush_icache_user_range(vma,pg,adr,len)        do { } while (0)
+#define __flush_wback_region(start, size)      do { (void)(start); } while (0)
+#define __flush_purge_region(start, size)      do { (void)(start); } while (0)
+#define __flush_invalidate_region(start, size) do { (void)(start); } while (0)
+#else
 #include <asm/cpu/cacheflush.h>
 
+/*
+ * Consistent DMA requires that the __flush_xxx() primitives must be set
+ * for any of the enabled non-coherent caches (most of the UP CPUs),
+ * regardless of PIPT or VIPT cache configurations.
+ */
+
 /* Flush (write-back only) a region (smaller than a page) */
 extern void __flush_wback_region(void *start, int size);
 /* Flush (write-back & invalidate) a region (smaller than a page) */
 extern void __flush_purge_region(void *start, int size);
 /* Flush (invalidate only) a region (smaller than a page) */
 extern void __flush_invalidate_region(void *start, int size);
+#endif
 
 #define flush_cache_vmap(start, end)           flush_cache_all()
 #define flush_cache_vunmap(start, end)         flush_cache_all()
@@ -30,8 +61,5 @@ extern void __flush_invalidate_region(void *start, int size);
 
 #define HAVE_ARCH_UNMAPPED_AREA
 
-/* Page flag for lazy dcache write-back for the aliasing UP caches */
-#define PG_dcache_dirty        PG_arch_1
-
 #endif /* __KERNEL__ */
 #endif /* __ASM_SH_CACHEFLUSH_H */