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authorGreg Ungerer <gerg@uclinux.org>2010-11-09 15:31:08 +1000
committerGreg Ungerer <gerg@uclinux.org>2011-01-05 15:19:20 +1000
commit0ef6c9b8f7bf62ea05be5b26ee14b18a116b0c2a (patch)
tree01ffb12226fef2f4de5f3408e21fe64e19b5a522 /arch/m68k
parentd475e3e4739ce465df740b51decbbea3b1b51823 (diff)
downloadop-kernel-dev-0ef6c9b8f7bf62ea05be5b26ee14b18a116b0c2a.zip
op-kernel-dev-0ef6c9b8f7bf62ea05be5b26ee14b18a116b0c2a.tar.gz
m68knommu: support version 2 ColdFire split cache
The newer version 2 ColdFire CPU cores support a configurable cache arrangement. The cache memory can be used as all instruction cache, all data cache, or split in half for both instruction and data caching. Support this setup via a Kconfig time menu that allows a kernel builder to choose the arrangement they want to use. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/include/asm/m52xxacr.h30
1 files changed, 16 insertions, 14 deletions
diff --git a/arch/m68k/include/asm/m52xxacr.h b/arch/m68k/include/asm/m52xxacr.h
index 52230b5..701f680 100644
--- a/arch/m68k/include/asm/m52xxacr.h
+++ b/arch/m68k/include/asm/m52xxacr.h
@@ -53,23 +53,25 @@
#define ACR_WPROTECT 0x00000004 /* Write protect region */
/*
- * Set the cache controller settings we will use. This code is set to
- * only use the instruction cache, even on the controllers that support
- * split cache. (This setup is trying to preserve the existing behavior
- * for now, in the furture I hope to actually use the split cache mode).
+ * Set the cache controller settings we will use. On the cores that support
+ * a split cache configuration we allow all the combinations at Kconfig
+ * time. For those cores that only have an instruction cache we just set
+ * that as on.
*/
-#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
- defined(CONFIG_M5249) || defined(CONFIG_M5272)
-#define CACHE_INIT (CACR_CINV)
-#define CACHE_MODE (CACR_CENB + CACR_DCM)
+#if defined(CONFIG_CACHE_I)
+#define CACHE_TYPE CACR_DISD
+#elif defined(CONFIG_CACHE_D)
+#define CACHE_TYPE CACR_DISI
#else
-#ifdef CONFIG_COLDFIRE_SW_A7
-#define CACHE_INIT (CACR_CINV + CACR_DISD)
-#define CACHE_MODE (CACR_CENB + CACR_DISD + CACR_DCM)
-#else
-#define CACHE_INIT (CACR_CINV + CACR_DISD + CACR_EUSP)
-#define CACHE_MODE (CACR_CENB + CACR_DISD + CACR_DCM + CACR_EUSP)
+#define CACHE_TYPE
#endif
+
+#if defined(CONFIG_HAVE_CACHE_SPLIT)
+#define CACHE_INIT (CACR_CINV + CACHE_TYPE + CACR_EUSP)
+#define CACHE_MODE (CACR_CENB + CACHE_TYPE + CACR_DCM + CACR_EUSP)
+#else
+#define CACHE_INIT (CACR_CINV)
+#define CACHE_MODE (CACR_CENB + CACR_DCM)
#endif
#define CACHE_INVALIDATE (CACHE_MODE + CACR_CINV)
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