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-rw-r--r--arch/m68knommu/include/asm/mcfcache.h150
1 files changed, 150 insertions, 0 deletions
diff --git a/arch/m68knommu/include/asm/mcfcache.h b/arch/m68knommu/include/asm/mcfcache.h
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+++ b/arch/m68knommu/include/asm/mcfcache.h
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+/****************************************************************************/
+
+/*
+ * mcfcache.h -- ColdFire CPU cache support code
+ *
+ * (C) Copyright 2004, Greg Ungerer <gerg@snapgear.com>
+ */
+
+/****************************************************************************/
+#ifndef __M68KNOMMU_MCFCACHE_H
+#define __M68KNOMMU_MCFCACHE_H
+/****************************************************************************/
+
+
+/*
+ * The different ColdFire families have different cache arrangments.
+ * Everything from a small instruction only cache, to configurable
+ * data and/or instruction cache, to unified instruction/data, to
+ * harvard style separate instruction and data caches.
+ */
+
+#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || defined(CONFIG_M5272)
+/*
+ * Simple version 2 core cache. These have instruction cache only,
+ * we just need to invalidate it and enable it.
+ */
+.macro CACHE_ENABLE
+ movel #0x01000000,%d0 /* invalidate cache cmd */
+ movec %d0,%CACR /* do invalidate cache */
+ movel #0x80000100,%d0 /* setup cache mask */
+ movec %d0,%CACR /* enable cache */
+.endm
+#endif /* CONFIG_M5206 || CONFIG_M5206e || CONFIG_M5272 */
+
+#if defined(CONFIG_M523x) || defined(CONFIG_M527x)
+/*
+ * New version 2 cores have a configurable split cache arrangement.
+ * For now I am just enabling instruction cache - but ultimately I
+ * think a split instruction/data cache would be better.
+ */
+.macro CACHE_ENABLE
+ movel #0x01400000,%d0
+ movec %d0,%CACR /* invalidate cache */
+ nop
+ movel #0x0000c000,%d0 /* set SDRAM cached only */
+ movec %d0,%ACR0
+ movel #0x00000000,%d0 /* no other regions cached */
+ movec %d0,%ACR1
+ movel #0x80400100,%d0 /* configure cache */
+ movec %d0,%CACR /* enable cache */
+ nop
+.endm
+#endif /* CONFIG_M523x || CONFIG_M527x */
+
+#if defined(CONFIG_M528x)
+.macro CACHE_ENABLE
+ nop
+ movel #0x01000000, %d0
+ movec %d0, %CACR /* Invalidate cache */
+ nop
+ movel #0x0000c020, %d0 /* Set SDRAM cached only */
+ movec %d0, %ACR0
+ movel #0x00000000, %d0 /* No other regions cached */
+ movec %d0, %ACR1
+ movel #0x80000200, %d0 /* Setup cache mask */
+ movec %d0, %CACR /* Enable cache */
+ nop
+.endm
+#endif /* CONFIG_M528x */
+
+#if defined(CONFIG_M5249) || defined(CONFIG_M5307)
+/*
+ * The version 3 core cache. Oddly enough the version 2 core 5249
+ * has the same SDRAM and cache setup as the version 3 cores.
+ * This is a single unified instruction/data cache.
+ */
+.macro CACHE_ENABLE
+ movel #0x01000000,%d0 /* invalidate whole cache */
+ movec %d0,%CACR
+ nop
+#if defined(DEBUGGER_COMPATIBLE_CACHE) || defined(CONFIG_SECUREEDGEMP3)
+ movel #0x0000c000,%d0 /* set SDRAM cached (write-thru) */
+#else
+ movel #0x0000c020,%d0 /* set SDRAM cached (copyback) */
+#endif
+ movec %d0,%ACR0
+ movel #0x00000000,%d0 /* no other regions cached */
+ movec %d0,%ACR1
+ movel #0xa0000200,%d0 /* enable cache */
+ movec %d0,%CACR
+ nop
+.endm
+#endif /* CONFIG_M5249 || CONFIG_M5307 */
+
+#if defined(CONFIG_M532x)
+.macro CACHE_ENABLE
+ movel #0x01000000,%d0 /* invalidate cache cmd */
+ movec %d0,%CACR /* do invalidate cache */
+ nop
+ movel #0x4001C000,%d0 /* set SDRAM cached (write-thru) */
+ movec %d0,%ACR0
+ movel #0x00000000,%d0 /* no other regions cached */
+ movec %d0,%ACR1
+ movel #0x80000200,%d0 /* setup cache mask */
+ movec %d0,%CACR /* enable cache */
+ nop
+.endm
+#endif /* CONFIG_M532x */
+
+#if defined(CONFIG_M5407)
+/*
+ * Version 4 cores have a true harvard style separate instruction
+ * and data cache. Invalidate and enable cache, also enable write
+ * buffers and branch accelerator.
+ */
+.macro CACHE_ENABLE
+ movel #0x01040100,%d0 /* invalidate whole cache */
+ movec %d0,%CACR
+ nop
+ movel #0x000fc000,%d0 /* set SDRAM cached only */
+ movec %d0, %ACR0
+ movel #0x00000000,%d0 /* no other regions cached */
+ movec %d0, %ACR1
+ movel #0x000fc000,%d0 /* set SDRAM cached only */
+ movec %d0, %ACR2
+ movel #0x00000000,%d0 /* no other regions cached */
+ movec %d0, %ACR3
+ movel #0xb6088400,%d0 /* enable caches */
+ movec %d0,%CACR
+ nop
+.endm
+#endif /* CONFIG_M5407 */
+
+#if defined(CONFIG_M520x)
+.macro CACHE_ENABLE
+ move.l #0x01000000,%d0 /* invalidate whole cache */
+ movec %d0,%CACR
+ nop
+ move.l #0x0000c000,%d0 /* set SDRAM cached (write-thru) */
+ movec %d0,%ACR0
+ move.l #0x00000000,%d0 /* no other regions cached */
+ movec %d0,%ACR1
+ move.l #0x80400000,%d0 /* enable 8K instruction cache */
+ movec %d0,%CACR
+ nop
+.endm
+#endif /* CONFIG_M520x */
+
+/****************************************************************************/
+#endif /* __M68KNOMMU_MCFCACHE_H */