1 /****************************************************************************/ 2 3 /* 4 * m52xxacr.h -- ColdFire version 2 core cache support 5 * 6 * (C) Copyright 2010, Greg Ungerer <gerg@snapgear.com> 7 */ 8 9 /****************************************************************************/ 10 #ifndef m52xxacr_h 11 #define m52xxacr_h 12 /****************************************************************************/ 13 14 /* 15 * All varients of the ColdFire using version 2 cores have a similar 16 * cache setup. Although not absolutely identical the cache register 17 * definitions are compatible for all of them. Mostly they support a 18 * configurable cache memory that can be instruction only, data only, 19 * or split instruction and data. The exception is the very old version 2 20 * core based parts, like the 5206(e), 5249 and 5272, which are instruction 21 * cache only. Cache size varies from 2k up to 16k. 22 */ 23 24 /* 25 * Define the Cache Control register flags. 26 */ 27 #define CACR_CENB 0x80000000 /* Enable cache */ 28 #define CACR_CDPI 0x10000000 /* Disable invalidation by CPUSHL */ 29 #define CACR_CFRZ 0x08000000 /* Cache freeze mode */ 30 #define CACR_CINV 0x01000000 /* Invalidate cache */ 31 #define CACR_DISI 0x00800000 /* Disable instruction cache */ 32 #define CACR_DISD 0x00400000 /* Disable data cache */ 33 #define CACR_INVI 0x00200000 /* Invalidate instruction cache */ 34 #define CACR_INVD 0x00100000 /* Invalidate data cache */ 35 #define CACR_CEIB 0x00000400 /* Non-cachable instruction burst */ 36 #define CACR_DCM 0x00000200 /* Default cache mode */ 37 #define CACR_DBWE 0x00000100 /* Buffered write enable */ 38 #define CACR_DWP 0x00000020 /* Write protection */ 39 #define CACR_EUSP 0x00000010 /* Enable separate user a7 */ 40 41 /* 42 * Define the Access Control register flags. 43 */ 44 #define ACR_BASE_POS 24 /* Address Base (upper 8 bits) */ 45 #define ACR_MASK_POS 16 /* Address Mask (next 8 bits) */ 46 #define ACR_ENABLE 0x00008000 /* Enable this ACR */ 47 #define ACR_USER 0x00000000 /* Allow only user accesses */ 48 #define ACR_SUPER 0x00002000 /* Allow supervisor access only */ 49 #define ACR_ANY 0x00004000 /* Allow any access type */ 50 #define ACR_CENB 0x00000000 /* Caching of region enabled */ 51 #define ACR_CDIS 0x00000040 /* Caching of region disabled */ 52 #define ACR_BWE 0x00000020 /* Write buffer enabled */ 53 #define ACR_WPROTECT 0x00000004 /* Write protect region */ 54 55 /* 56 * Set the cache controller settings we will use. On the cores that support 57 * a split cache configuration we allow all the combinations at Kconfig 58 * time. For those cores that only have an instruction cache we just set 59 * that as on. 60 */ 61 #if defined(CONFIG_CACHE_I) 62 #define CACHE_TYPE (CACR_DISD + CACR_EUSP) 63 #define CACHE_INVTYPEI 0 64 #elif defined(CONFIG_CACHE_D) 65 #define CACHE_TYPE (CACR_DISI + CACR_EUSP) 66 #define CACHE_INVTYPED 0 67 #elif defined(CONFIG_CACHE_BOTH) 68 #define CACHE_TYPE CACR_EUSP 69 #define CACHE_INVTYPEI CACR_INVI 70 #define CACHE_INVTYPED CACR_INVD 71 #else 72 /* This is the instruction cache only devices (no split cache, no eusp) */ 73 #define CACHE_TYPE 0 74 #define CACHE_INVTYPEI 0 75 #endif 76 77 #define CACHE_INIT (CACR_CINV + CACHE_TYPE) 78 #define CACHE_MODE (CACR_CENB + CACHE_TYPE + CACR_DCM) 79 80 #define CACHE_INVALIDATE (CACHE_MODE + CACR_CINV) 81 #if defined(CACHE_INVTYPEI) 82 #define CACHE_INVALIDATEI (CACHE_MODE + CACR_CINV + CACHE_INVTYPEI) 83 #endif 84 #if defined(CACHE_INVTYPED) 85 #define CACHE_INVALIDATED (CACHE_MODE + CACR_CINV + CACHE_INVTYPED) 86 #endif 87 88 #define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \ 89 (0x000f0000) + \ 90 (ACR_ENABLE + ACR_ANY + ACR_CENB + ACR_BWE)) 91 #define ACR1_MODE 0 92 93 /****************************************************************************/ 94 #endif /* m52xxsim_h */ 95