forked from Minki/linux
ea49f8ffae
Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
151 lines
4.4 KiB
C
151 lines
4.4 KiB
C
/****************************************************************************/
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/*
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* mcfcache.h -- ColdFire CPU cache support code
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*
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* (C) Copyright 2004, Greg Ungerer <gerg@snapgear.com>
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*/
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/****************************************************************************/
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#ifndef __M68KNOMMU_MCFCACHE_H
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#define __M68KNOMMU_MCFCACHE_H
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/****************************************************************************/
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/*
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* The different ColdFire families have different cache arrangments.
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* Everything from a small instruction only cache, to configurable
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* data and/or instruction cache, to unified instruction/data, to
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* harvard style separate instruction and data caches.
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*/
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#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || defined(CONFIG_M5272)
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/*
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* Simple version 2 core cache. These have instruction cache only,
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* we just need to invalidate it and enable it.
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*/
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.macro CACHE_ENABLE
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movel #0x01000000,%d0 /* invalidate cache cmd */
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movec %d0,%CACR /* do invalidate cache */
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movel #0x80000100,%d0 /* setup cache mask */
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movec %d0,%CACR /* enable cache */
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.endm
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#endif /* CONFIG_M5206 || CONFIG_M5206e || CONFIG_M5272 */
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#if defined(CONFIG_M523x) || defined(CONFIG_M527x)
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/*
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* New version 2 cores have a configurable split cache arrangement.
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* For now I am just enabling instruction cache - but ultimately I
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* think a split instruction/data cache would be better.
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*/
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.macro CACHE_ENABLE
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movel #0x01400000,%d0
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movec %d0,%CACR /* invalidate cache */
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nop
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movel #0x0000c000,%d0 /* set SDRAM cached only */
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movec %d0,%ACR0
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movel #0x00000000,%d0 /* no other regions cached */
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movec %d0,%ACR1
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movel #0x80400100,%d0 /* configure cache */
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movec %d0,%CACR /* enable cache */
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nop
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.endm
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#endif /* CONFIG_M523x || CONFIG_M527x */
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#if defined(CONFIG_M528x)
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.macro CACHE_ENABLE
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nop
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movel #0x01000000, %d0
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movec %d0, %CACR /* Invalidate cache */
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nop
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movel #0x0000c020, %d0 /* Set SDRAM cached only */
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movec %d0, %ACR0
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movel #0x00000000, %d0 /* No other regions cached */
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movec %d0, %ACR1
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movel #0x80000200, %d0 /* Setup cache mask */
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movec %d0, %CACR /* Enable cache */
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nop
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.endm
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#endif /* CONFIG_M528x */
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#if defined(CONFIG_M5249) || defined(CONFIG_M5307)
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/*
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* The version 3 core cache. Oddly enough the version 2 core 5249
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* has the same SDRAM and cache setup as the version 3 cores.
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* This is a single unified instruction/data cache.
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*/
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.macro CACHE_ENABLE
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movel #0x01000000,%d0 /* invalidate whole cache */
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movec %d0,%CACR
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nop
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#if defined(DEBUGGER_COMPATIBLE_CACHE) || defined(CONFIG_SECUREEDGEMP3)
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movel #0x0000c000,%d0 /* set SDRAM cached (write-thru) */
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#else
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movel #0x0000c020,%d0 /* set SDRAM cached (copyback) */
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#endif
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movec %d0,%ACR0
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movel #0x00000000,%d0 /* no other regions cached */
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movec %d0,%ACR1
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movel #0xa0000200,%d0 /* enable cache */
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movec %d0,%CACR
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nop
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.endm
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#endif /* CONFIG_M5249 || CONFIG_M5307 */
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#if defined(CONFIG_M532x)
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.macro CACHE_ENABLE
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movel #0x01000000,%d0 /* invalidate cache cmd */
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movec %d0,%CACR /* do invalidate cache */
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nop
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movel #0x4001C000,%d0 /* set SDRAM cached (write-thru) */
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movec %d0,%ACR0
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movel #0x00000000,%d0 /* no other regions cached */
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movec %d0,%ACR1
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movel #0x80000200,%d0 /* setup cache mask */
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movec %d0,%CACR /* enable cache */
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nop
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.endm
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#endif /* CONFIG_M532x */
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#if defined(CONFIG_M5407) || defined(CONFIG_M548x)
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/*
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* Version 4 cores have a true harvard style separate instruction
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* and data cache. Invalidate and enable cache, also enable write
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* buffers and branch accelerator.
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*/
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.macro CACHE_ENABLE
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movel #0x01040100,%d0 /* invalidate whole cache */
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movec %d0,%CACR
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nop
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movel #0x000fc000,%d0 /* set SDRAM cached only */
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movec %d0, %ACR0
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movel #0x00000000,%d0 /* no other regions cached */
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movec %d0, %ACR1
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movel #0x000fc000,%d0 /* set SDRAM cached only */
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movec %d0, %ACR2
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movel #0x00000000,%d0 /* no other regions cached */
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movec %d0, %ACR3
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movel #0xb6088400,%d0 /* enable caches */
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movec %d0,%CACR
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nop
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.endm
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#endif /* CONFIG_M5407 */
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#if defined(CONFIG_M520x)
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.macro CACHE_ENABLE
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move.l #0x01000000,%d0 /* invalidate whole cache */
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movec %d0,%CACR
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nop
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move.l #0x0000c000,%d0 /* set SDRAM cached (write-thru) */
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movec %d0,%ACR0
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move.l #0x00000000,%d0 /* no other regions cached */
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movec %d0,%ACR1
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move.l #0x80400000,%d0 /* enable 8K instruction cache */
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movec %d0,%CACR
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nop
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.endm
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#endif /* CONFIG_M520x */
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/****************************************************************************/
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#endif /* __M68KNOMMU_MCFCACHE_H */
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