/* SPDX-License-Identifier: GPL-2.0 */
/****************************************************************************/
/*
* m53xxacr . h - - ColdFire version 3 core cache support
*
* ( C ) Copyright 2010 , Greg Ungerer < gerg @ snapgear . com >
*/
/****************************************************************************/
#ifndef m53xxacr_h
#define m53xxacr_h
/****************************************************************************/
/*
* All varients of the ColdFire using version 3 cores have a similar
* cache setup . They have a unified instruction and data cache , with
* configurable write - through or copy - back operation .
*/
/*
* Define the Cache Control register flags .
*/
#define CACR_EC 0 x80000000 /* Enable cache */
#define CACR_ESB 0 x20000000 /* Enable store buffer */
#define CACR_DPI 0 x10000000 /* Disable invalidation by CPUSHL */
#define CACR_HLCK 0 x08000000 /* Half cache lock mode */
#define CACR_CINVA 0 x01000000 /* Invalidate cache */
#define CACR_DNFB 0 x00000400 /* Inhibited fill buffer */
#define CACR_DCM_WT 0 x00000000 /* Cacheable write-through */
#define CACR_DCM_CB 0 x00000100 /* Cacheable copy-back */
#define CACR_DCM_PRE 0 x00000200 /* Cache inhibited, precise */
#define CACR_DCM_IMPRE 0 x00000300 /* Cache inhibited, imprecise */
#define CACR_WPROTECT 0 x00000020 /* Write protect*/
#define CACR_EUSP 0 x00000010 /* Eanble 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 0 x00008000 /* Enable this ACR */
#define ACR_USER 0 x00000000 /* Allow only user accesses */
#define ACR_SUPER 0 x00002000 /* Allow supervisor access only */
#define ACR_ANY 0 x00004000 /* Allow any access type */
#define ACR_CM_WT 0 x00000000 /* Cacheable, write-through */
#define ACR_CM_CB 0 x00000020 /* Cacheable, copy-back */
#define ACR_CM_PRE 0 x00000040 /* Cache inhibited, precise */
#define ACR_CM_IMPRE 0 x00000060 /* Cache inhibited, imprecise */
#define ACR_WPROTECT 0 x00000004 /* Write protect region */
/*
* Define the cache type and arrangement ( needed for pushes ) .
*/
#if defined (CONFIG_M5307)
#define CACHE_SIZE 0 x2000 /* 8k of unified cache */
#define ICACHE_SIZE CACHE_SIZE
#define DCACHE_SIZE CACHE_SIZE
#elif defined (CONFIG_M53xx)
#define CACHE_SIZE 0 x4000 /* 16k of unified cache */
#define ICACHE_SIZE CACHE_SIZE
#define DCACHE_SIZE CACHE_SIZE
#endif
#define CACHE_LINE_SIZE 16 /* 16 byte line size */
#define CACHE_WAYS 4 /* 4 ways - set associative */
/*
* Set the cache controller settings we will use . This default in the
* CACR is cache inhibited , we use the ACR register to set cacheing
* enabled on the regions we want ( eg RAM ) .
*/
#if defined (CONFIG_CACHE_COPYBACK)
#define CACHE_TYPE ACR_CM_CB
#define CACHE_PUSH
#else
#define CACHE_TYPE ACR_CM_WT
#endif
#ifdef CONFIG_COLDFIRE_SW_A7
#define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE)
#else
#define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE + CACR_EUSP)
#endif
/*
* Unified cache means we will never need to flush for coherency of
* instruction fetch . We will need to flush to maintain memory / DMA
* coherency though in all cases . And for copyback caches we will need
* to push cached data as well .
*/
#define CACHE_INIT (CACHE_MODE + CACR_CINVA - CACR_EC)
#define CACHE_INVALIDATE (CACHE_MODE + CACR_CINVA)
#define CACHE_INVALIDATED (CACHE_MODE + CACR_CINVA)
#define ACR0_MODE ((CONFIG_RAMBASE & 0 xff000000) + \
(0 x000f0000) + \
(ACR_ENABLE + ACR_ANY + CACHE_TYPE))
#define ACR1_MODE 0
/****************************************************************************/
#endif /* m53xxsim_h */
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