diff options
Diffstat (limited to 'include/asm-m68knommu/mcfcache.h')
| -rw-r--r-- | include/asm-m68knommu/mcfcache.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/include/asm-m68knommu/mcfcache.h b/include/asm-m68knommu/mcfcache.h new file mode 100644 index 0000000..bdd8c53 --- /dev/null +++ b/include/asm-m68knommu/mcfcache.h @@ -0,0 +1,125 @@ +/****************************************************************************/ + +/* + * mcfcache.h -- ColdFire CPU cache support code + * + * (C) Copyright 2004, Greg Ungerer <gerg@snapgear.com> + */ + +/****************************************************************************/ +#ifndef __M68KNOMMU_MCFCACHE_H +#define __M68KNOMMU_MCFCACHE_H +/****************************************************************************/ + +#include <linux/config.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_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_M527x */ + +#if defined(CONFIG_M528x) +/* + * Cache is totally broken on early 5282 silicon. So far now we + * disable its cache all together. + */ +.macro CACHE_ENABLE + movel #0x01000000,%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 #0x00000000,%d0 /* configure cache */ + 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_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 */ + + +/****************************************************************************/ +#endif /* __M68KNOMMU_MCFCACHE_H */ |
