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authorGreg Ungerer <gerg@uclinux.org>2012-05-02 17:02:21 +1000
committerGreg Ungerer <gerg@uclinux.org>2012-05-20 21:22:08 +1000
commit1744bd921cd1037f0415574e0f8a3611984ecc7c (patch)
treea2607da59035bf3758e0e3c0c04cde6e1fd633ca /arch/m68k
parent453549d2e511a8490e04f91b084aa418f9f4e5d2 (diff)
downloadlinux-1744bd921cd1037f0415574e0f8a3611984ecc7c.tar.bz2
m68knommu: reorganize the no-MMU cache flushing to match m68k
Introduce cache_push() and cache_clear() functions for the non-MMU m68k devices. With these in place we can more easily merge some of the common m68k arch code. In particular by reorganizing the __flush_cache_all() code and separating the cache push and clear functions it becomes trivial to implement the new cache_push() and cache_clear() functions. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/include/asm/cacheflush_no.h32
1 files changed, 28 insertions, 4 deletions
diff --git a/arch/m68k/include/asm/cacheflush_no.h b/arch/m68k/include/asm/cacheflush_no.h
index cb88aa96c4f1..7cafb537d03c 100644
--- a/arch/m68k/include/asm/cacheflush_no.h
+++ b/arch/m68k/include/asm/cacheflush_no.h
@@ -30,11 +30,8 @@
void mcf_cache_push(void);
-static inline void __flush_cache_all(void)
+static inline void __clear_cache_all(void)
{
-#ifdef CACHE_PUSH
- mcf_cache_push();
-#endif
#ifdef CACHE_INVALIDATE
__asm__ __volatile__ (
"movel %0, %%d0\n\t"
@@ -44,6 +41,14 @@ static inline void __flush_cache_all(void)
#endif
}
+static inline void __flush_cache_all(void)
+{
+#ifdef CACHE_PUSH
+ mcf_cache_push();
+#endif
+ __clear_cache_all();
+}
+
/*
* Some ColdFire parts implement separate instruction and data caches,
* on those we should just flush the appropriate cache. If we don't need
@@ -76,4 +81,23 @@ static inline void __flush_dcache_all(void)
__asm__ __volatile__ ( "nop" );
#endif
}
+
+/*
+ * Push cache entries at supplied address. We want to write back any dirty
+ * data and the invalidate the cache lines associated with this address.
+ */
+static inline void cache_push(unsigned long paddr, int len)
+{
+ __flush_cache_all();
+}
+
+/*
+ * Clear cache entries at supplied address (that is don't write back any
+ * dirty data).
+ */
+static inline void cache_clear(unsigned long paddr, int len)
+{
+ __clear_cache_all();
+}
+
#endif /* _M68KNOMMU_CACHEFLUSH_H */