103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/****************************************************************************/
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/*
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* m53xxacr.h -- ColdFire version 3 core cache support
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*
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* (C) Copyright 2010, Greg Ungerer <gerg@snapgear.com>
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*/
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/****************************************************************************/
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#ifndef m53xxacr_h
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#define m53xxacr_h
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/****************************************************************************/
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/*
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* All varients of the ColdFire using version 3 cores have a similar
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* cache setup. They have a unified instruction and data cache, with
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* configurable write-through or copy-back operation.
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*/
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/*
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* Define the Cache Control register flags.
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*/
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#define CACR_EC 0x80000000 /* Enable cache */
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#define CACR_ESB 0x20000000 /* Enable store buffer */
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#define CACR_DPI 0x10000000 /* Disable invalidation by CPUSHL */
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#define CACR_HLCK 0x08000000 /* Half cache lock mode */
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#define CACR_CINVA 0x01000000 /* Invalidate cache */
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#define CACR_DNFB 0x00000400 /* Inhibited fill buffer */
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#define CACR_DCM_WT 0x00000000 /* Cacheable write-through */
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#define CACR_DCM_CB 0x00000100 /* Cacheable copy-back */
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#define CACR_DCM_PRE 0x00000200 /* Cache inhibited, precise */
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#define CACR_DCM_IMPRE 0x00000300 /* Cache inhibited, imprecise */
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#define CACR_WPROTECT 0x00000020 /* Write protect*/
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#define CACR_EUSP 0x00000010 /* Eanble separate user a7 */
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/*
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* Define the Access Control register flags.
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*/
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#define ACR_BASE_POS 24 /* Address Base (upper 8 bits) */
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#define ACR_MASK_POS 16 /* Address Mask (next 8 bits) */
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#define ACR_ENABLE 0x00008000 /* Enable this ACR */
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#define ACR_USER 0x00000000 /* Allow only user accesses */
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#define ACR_SUPER 0x00002000 /* Allow supervisor access only */
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#define ACR_ANY 0x00004000 /* Allow any access type */
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#define ACR_CM_WT 0x00000000 /* Cacheable, write-through */
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#define ACR_CM_CB 0x00000020 /* Cacheable, copy-back */
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#define ACR_CM_PRE 0x00000040 /* Cache inhibited, precise */
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#define ACR_CM_IMPRE 0x00000060 /* Cache inhibited, imprecise */
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#define ACR_WPROTECT 0x00000004 /* Write protect region */
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/*
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* Define the cache type and arrangement (needed for pushes).
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*/
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#if defined(CONFIG_M5307)
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#define CACHE_SIZE 0x2000 /* 8k of unified cache */
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#define ICACHE_SIZE CACHE_SIZE
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#define DCACHE_SIZE CACHE_SIZE
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#elif defined(CONFIG_M53xx)
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#define CACHE_SIZE 0x4000 /* 16k of unified cache */
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#define ICACHE_SIZE CACHE_SIZE
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#define DCACHE_SIZE CACHE_SIZE
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#endif
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#define CACHE_LINE_SIZE 16 /* 16 byte line size */
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#define CACHE_WAYS 4 /* 4 ways - set associative */
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/*
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* Set the cache controller settings we will use. This default in the
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* CACR is cache inhibited, we use the ACR register to set cacheing
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* enabled on the regions we want (eg RAM).
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*/
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#if defined(CONFIG_CACHE_COPYBACK)
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#define CACHE_TYPE ACR_CM_CB
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#define CACHE_PUSH
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#else
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#define CACHE_TYPE ACR_CM_WT
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#endif
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#ifdef CONFIG_COLDFIRE_SW_A7
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#define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE)
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#else
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#define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE + CACR_EUSP)
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#endif
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/*
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* Unified cache means we will never need to flush for coherency of
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* instruction fetch. We will need to flush to maintain memory/DMA
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* coherency though in all cases. And for copyback caches we will need
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* to push cached data as well.
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*/
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#define CACHE_INIT (CACHE_MODE + CACR_CINVA - CACR_EC)
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#define CACHE_INVALIDATE (CACHE_MODE + CACR_CINVA)
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#define CACHE_INVALIDATED (CACHE_MODE + CACR_CINVA)
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#define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \
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(0x000f0000) + \
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(ACR_ENABLE + ACR_ANY + CACHE_TYPE))
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#define ACR1_MODE 0
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/****************************************************************************/
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#endif /* m53xxsim_h */
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