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/****************************************************************************/
/*
* m52xxacr.h -- ColdFire version 2 core cache support
*
* (C) Copyright 2010, Greg Ungerer <gerg@snapgear.com>
*/
/****************************************************************************/
#ifndef m52xxacr_h
#define m52xxacr_h
/****************************************************************************/
/*
* All varients of the ColdFire using version 2 cores have a similar
* cache setup. Although not absolutely identical the cache register
* definitions are compatible for all of them. Mostly they support a
* configurable cache memory that can be instruction only, data only,
* or split instruction and data. The exception is the very old version 2
* core based parts, like the 5206(e), 5249 and 5272, which are instruction
* cache only. Cache size varies from 2k up to 16k.
*/
/*
* Define the Cache Control register flags.
*/
#define CACR_CENB 0x80000000 /* Enable cache */
#define CACR_CDPI 0x10000000 /* Disable invalidation by CPUSHL */
#define CACR_CFRZ 0x08000000 /* Cache freeze mode */
#define CACR_CINV 0x01000000 /* Invalidate cache */
#define CACR_DISI 0x00800000 /* Disable instruction cache */
#define CACR_DISD 0x00400000 /* Disable data cache */
#define CACR_INVI 0x00200000 /* Invalidate instruction cache */
#define CACR_INVD 0x00100000 /* Invalidate data cache */
#define CACR_CEIB 0x00000400 /* Non-cachable instruction burst */
#define CACR_DCM 0x00000200 /* Default cache mode */
#define CACR_DBWE 0x00000100 /* Buffered write enable */
#define CACR_DWP 0x00000020 /* Write protection */
#define CACR_EUSP 0x00000010 /* Enable separate user a7 */
/*
* Define the Access Control register flags.
*/
#define ACR_BASE_POS 24 /* Address Base (upper 8 bits) */
#define ACR_MASK_POS 16 /* Address Mask (next 8 bits) */
#define ACR_ENABLE 0x00008000 /* Enable this ACR */
#define ACR_USER 0x00000000 /* Allow only user accesses */
#define ACR_SUPER 0x00002000 /* Allow supervisor access only */
#define ACR_ANY 0x00004000 /* Allow any access type */
#define ACR_CENB 0x00000000 /* Caching of region enabled */
#define ACR_CDIS 0x00000040 /* Caching of region disabled */
#define ACR_BWE 0x00000020 /* Write buffer enabled */
#define ACR_WPROTECT 0x00000004 /* Write protect region */
/*
* 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_CACHE_I)
#define CACHE_TYPE CACR_DISD
#elif defined(CONFIG_CACHE_D)
#define CACHE_TYPE CACR_DISI
#else
#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)
#define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \
(0x000f0000) + \
(ACR_ENABLE + ACR_ANY + ACR_CENB + ACR_BWE))
#define ACR1_MODE 0
/****************************************************************************/
#endif /* m52xxsim_h */
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