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authorGreg Ungerer <gerg@uclinux.org>2010-11-09 14:27:50 +1000
committerGreg Ungerer <gerg@uclinux.org>2011-01-05 15:19:19 +1000
commitd475e3e4739ce465df740b51decbbea3b1b51823 (patch)
tree537a24e871043cb216fe9db747e94367eca47a71 /arch/m68k
parent8ce877a8eb8293b5b2c07f259d694026b0f519e4 (diff)
m68knommu: make cache push code ColdFire generic
Currently the code to push cache lines is only available to version 4 cores. Version 3 cores may also need to use this if we support copy- back caches on them. Move this code to make it more generic, and useful for all version ColdFire cores. With this in place we can now have a single cache_flush_all() code path that does all the right things on all version cores. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/include/asm/cacheflush_no.h7
-rw-r--r--arch/m68k/include/asm/m54xxacr.h38
2 files changed, 7 insertions, 38 deletions
diff --git a/arch/m68k/include/asm/cacheflush_no.h b/arch/m68k/include/asm/cacheflush_no.h
index 8ada4ffc98e..f931e182983 100644
--- a/arch/m68k/include/asm/cacheflush_no.h
+++ b/arch/m68k/include/asm/cacheflush_no.h
@@ -30,9 +30,13 @@
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
-#ifndef __flush_cache_all
+void mcf_cache_push(void);
+
static inline void __flush_cache_all(void)
{
+#ifdef CACHE_PUSH
+ mcf_cache_push();
+#endif
#ifdef CACHE_INVALIDATE
__asm__ __volatile__ (
"movel %0, %%d0\n\t"
@@ -41,6 +45,5 @@ static inline void __flush_cache_all(void)
: : "i" (CACHE_INVALIDATE) : "d0" );
#endif
}
-#endif /* __flush_cache_all */
#endif /* _M68KNOMMU_CACHEFLUSH_H */
diff --git a/arch/m68k/include/asm/m54xxacr.h b/arch/m68k/include/asm/m54xxacr.h
index 3c81a7a34a8..6bce82fdb9c 100644
--- a/arch/m68k/include/asm/m54xxacr.h
+++ b/arch/m68k/include/asm/m54xxacr.h
@@ -83,46 +83,12 @@
#define ACR2_MODE (0x000f0000+INSN_CACHE_MODE)
#define ACR3_MODE 0
-#ifndef __ASSEMBLY__
-
#if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_WT)
#define flush_dcache_range(a, l) do { asm("nop"); } while (0)
#endif
-
-static inline void __m54xx_flush_cache_all(void)
-{
- __asm__ __volatile__ (
#if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_CP)
- /*
- * Use cpushl to push and invalidate all cache lines.
- * Gas doesn't seem to know how to generate the ColdFire
- * cpushl instruction... Oh well, bit stuff it for now.
- */
- "clrl %%d0\n\t"
- "1:\n\t"
- "movel %%d0,%%a0\n\t"
- "2:\n\t"
- ".word 0xf468\n\t"
- "addl %0,%%a0\n\t"
- "cmpl %1,%%a0\n\t"
- "blt 2b\n\t"
- "addql #1,%%d0\n\t"
- "cmpil %2,%%d0\n\t"
- "bne 1b\n\t"
+/* Copyback cache mode must push dirty cache lines first */
+#define CACHE_PUSH
#endif
- "movel %3,%%d0\n\t"
- "movec %%d0,%%CACR\n\t"
- "nop\n\t" /* forces flush of Store Buffer */
- : /* No output */
- : "i" (CACHE_LINE_SIZE),
- "i" (DCACHE_SIZE / CACHE_WAYS),
- "i" (CACHE_WAYS),
- "i" (CACHE_INVALIDATE)
- : "d0", "a0" );
-}
-
-#define __flush_cache_all() __m54xx_flush_cache_all()
-
-#endif /* __ASSEMBLY__ */
#endif /* m54xxacr_h */