1 /****************************************************************************/ 2 3 /* 4 * m53xxacr.h -- ColdFire version 3 core cache support 5 * 6 * (C) Copyright 2010, Greg Ungerer <gerg@snapgear.com> 7 */ 8 9 /****************************************************************************/ 10 #ifndef m53xxacr_h 11 #define m53xxacr_h 12 /****************************************************************************/ 13 14 /* 15 * All varients of the ColdFire using version 3 cores have a similar 16 * cache setup. They have a unified instruction and data cache, with 17 * configurable write-through or copy-back operation. 18 */ 19 20 /* 21 * Define the Cache Control register flags. 22 */ 23 #define CACR_EC 0x80000000 /* Enable cache */ 24 #define CACR_ESB 0x20000000 /* Enable store buffer */ 25 #define CACR_DPI 0x10000000 /* Disable invalidation by CPUSHL */ 26 #define CACR_HLCK 0x08000000 /* Half cache lock mode */ 27 #define CACR_CINVA 0x01000000 /* Invalidate cache */ 28 #define CACR_DNFB 0x00000400 /* Inhibited fill buffer */ 29 #define CACR_DCM_WT 0x00000000 /* Cacheable write-through */ 30 #define CACR_DCM_CB 0x00000100 /* Cacheable copy-back */ 31 #define CACR_DCM_PRE 0x00000200 /* Cache inhibited, precise */ 32 #define CACR_DCM_IMPRE 0x00000300 /* Cache inhibited, imprecise */ 33 #define CACR_WPROTECT 0x00000020 /* Write protect*/ 34 #define CACR_EUSP 0x00000010 /* Eanble separate user a7 */ 35 36 /* 37 * Define the Access Control register flags. 38 */ 39 #define ACR_BASE_POS 24 /* Address Base (upper 8 bits) */ 40 #define ACR_MASK_POS 16 /* Address Mask (next 8 bits) */ 41 #define ACR_ENABLE 0x00008000 /* Enable this ACR */ 42 #define ACR_USER 0x00000000 /* Allow only user accesses */ 43 #define ACR_SUPER 0x00002000 /* Allow supervisor access only */ 44 #define ACR_ANY 0x00004000 /* Allow any access type */ 45 #define ACR_CM_WT 0x00000000 /* Cacheable, write-through */ 46 #define ACR_CM_CB 0x00000020 /* Cacheable, copy-back */ 47 #define ACR_CM_PRE 0x00000040 /* Cache inhibited, precise */ 48 #define ACR_CM_IMPRE 0x00000060 /* Cache inhibited, imprecise */ 49 #define ACR_WPROTECT 0x00000004 /* Write protect region */ 50 51 /* 52 * Define the cache type and arrangement (needed for pushes). 53 */ 54 #if defined(CONFIG_M5307) 55 #define CACHE_SIZE 0x2000 /* 8k of unified cache */ 56 #define ICACHE_SIZE CACHE_SIZE 57 #define DCACHE_SIZE CACHE_SIZE 58 #elif defined(CONFIG_M53xx) 59 #define CACHE_SIZE 0x4000 /* 16k of unified cache */ 60 #define ICACHE_SIZE CACHE_SIZE 61 #define DCACHE_SIZE CACHE_SIZE 62 #endif 63 64 #define CACHE_LINE_SIZE 16 /* 16 byte line size */ 65 #define CACHE_WAYS 4 /* 4 ways - set associative */ 66 67 /* 68 * Set the cache controller settings we will use. This default in the 69 * CACR is cache inhibited, we use the ACR register to set cacheing 70 * enabled on the regions we want (eg RAM). 71 */ 72 #if defined(CONFIG_CACHE_COPYBACK) 73 #define CACHE_TYPE ACR_CM_CB 74 #define CACHE_PUSH 75 #else 76 #define CACHE_TYPE ACR_CM_WT 77 #endif 78 79 #ifdef CONFIG_COLDFIRE_SW_A7 80 #define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE) 81 #else 82 #define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE + CACR_EUSP) 83 #endif 84 85 /* 86 * Unified cache means we will never need to flush for coherency of 87 * instruction fetch. We will need to flush to maintain memory/DMA 88 * coherency though in all cases. And for copyback caches we will need 89 * to push cached data as well. 90 */ 91 #define CACHE_INIT CACR_CINVA 92 #define CACHE_INVALIDATE CACR_CINVA 93 #define CACHE_INVALIDATED CACR_CINVA 94 95 #define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \ 96 (0x000f0000) + \ 97 (ACR_ENABLE + ACR_ANY + CACHE_TYPE)) 98 #define ACR1_MODE 0 99 100 /****************************************************************************/ 101 #endif /* m53xxsim_h */ 102