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m53xxacr.h
/* 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 0x80000000 /* Enable cache */ #define CACR_ESB 0x20000000 /* Enable store buffer */ #define CACR_DPI 0x10000000 /* Disable invalidation by CPUSHL */ #define CACR_HLCK 0x08000000 /* Half cache lock mode */ #define CACR_CINVA 0x01000000 /* Invalidate cache */ #define CACR_DNFB 0x00000400 /* Inhibited fill buffer */ #define CACR_DCM_WT 0x00000000 /* Cacheable write-through */ #define CACR_DCM_CB 0x00000100 /* Cacheable copy-back */ #define CACR_DCM_PRE 0x00000200 /* Cache inhibited, precise */ #define CACR_DCM_IMPRE 0x00000300 /* Cache inhibited, imprecise */ #define CACR_WPROTECT 0x00000020 /* Write protect*/ #define CACR_EUSP 0x00000010 /* 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 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_CM_WT 0x00000000 /* Cacheable, write-through */ #define ACR_CM_CB 0x00000020 /* Cacheable, copy-back */ #define ACR_CM_PRE 0x00000040 /* Cache inhibited, precise */ #define ACR_CM_IMPRE 0x00000060 /* Cache inhibited, imprecise */ #define ACR_WPROTECT 0x00000004 /* Write protect region */ /* * Define the cache type and arrangement (needed for pushes). */ #if defined(CONFIG_M5307) #define CACHE_SIZE 0x2000 /* 8k of unified cache */ #define ICACHE_SIZE CACHE_SIZE #define DCACHE_SIZE CACHE_SIZE #elif defined(CONFIG_M53xx) #define CACHE_SIZE 0x4000 /* 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 & 0xff000000) + \ (0x000f0000) + \ (ACR_ENABLE + ACR_ANY + CACHE_TYPE)) #define ACR1_MODE 0 /****************************************************************************/ #endif /* m53xxsim_h */
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