| /****************************************************************************/ |
| |
| /* |
| * m52xxacr.h -- ColdFire version 2 core cache support |
| * |
| * (C) Copyright 2010, Greg Ungerer <gerg@snapgear.com> |
| */ |
| |
| /****************************************************************************/ |
| #ifndef m52xxacr_h |
| #define m52xxacr_h |
| /****************************************************************************/ |
| |
| /* |
| * All varients of the ColdFire using version 2 cores have a similar |
| * cache setup. Although not absolutely identical the cache register |
| * definitions are compatible for all of them. Mostly they support a |
| * configurable cache memory that can be instruction only, data only, |
| * or split instruction and data. The exception is the very old version 2 |
| * core based parts, like the 5206(e), 5249 and 5272, which are instruction |
| * cache only. Cache size varies from 2k up to 16k. |
| */ |
| |
| /* |
| * Define the Cache Control register flags. |
| */ |
| #define CACR_CENB 0x80000000 /* Enable cache */ |
| #define CACR_CDPI 0x10000000 /* Disable invalidation by CPUSHL */ |
| #define CACR_CFRZ 0x08000000 /* Cache freeze mode */ |
| #define CACR_CINV 0x01000000 /* Invalidate cache */ |
| #define CACR_DISI 0x00800000 /* Disable instruction cache */ |
| #define CACR_DISD 0x00400000 /* Disable data cache */ |
| #define CACR_INVI 0x00200000 /* Invalidate instruction cache */ |
| #define CACR_INVD 0x00100000 /* Invalidate data cache */ |
| #define CACR_CEIB 0x00000400 /* Non-cachable instruction burst */ |
| #define CACR_DCM 0x00000200 /* Default cache mode */ |
| #define CACR_DBWE 0x00000100 /* Buffered write enable */ |
| #define CACR_DWP 0x00000020 /* Write protection */ |
| #define CACR_EUSP 0x00000010 /* Enable 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_CENB 0x00000000 /* Caching of region enabled */ |
| #define ACR_CDIS 0x00000040 /* Caching of region disabled */ |
| #define ACR_BWE 0x00000020 /* Write buffer enabled */ |
| #define ACR_WPROTECT 0x00000004 /* Write protect region */ |
| |
| /* |
| * Set the cache controller settings we will use. On the cores that support |
| * a split cache configuration we allow all the combinations at Kconfig |
| * time. For those cores that only have an instruction cache we just set |
| * that as on. |
| */ |
| #if defined(CONFIG_CACHE_I) |
| #define CACHE_TYPE (CACR_DISD + CACR_EUSP) |
| #define CACHE_INVTYPEI 0 |
| #elif defined(CONFIG_CACHE_D) |
| #define CACHE_TYPE (CACR_DISI + CACR_EUSP) |
| #define CACHE_INVTYPED 0 |
| #elif defined(CONFIG_CACHE_BOTH) |
| #define CACHE_TYPE CACR_EUSP |
| #define CACHE_INVTYPEI CACR_INVI |
| #define CACHE_INVTYPED CACR_INVD |
| #else |
| /* This is the instruction cache only devices (no split cache, no eusp) */ |
| #define CACHE_TYPE 0 |
| #define CACHE_INVTYPEI 0 |
| #endif |
| |
| #define CACHE_INIT (CACR_CINV + CACHE_TYPE) |
| #define CACHE_MODE (CACR_CENB + CACHE_TYPE + CACR_DCM) |
| |
| #define CACHE_INVALIDATE (CACHE_MODE + CACR_CINV) |
| #if defined(CACHE_INVTYPEI) |
| #define CACHE_INVALIDATEI (CACHE_MODE + CACR_CINV + CACHE_INVTYPEI) |
| #endif |
| #if defined(CACHE_INVTYPED) |
| #define CACHE_INVALIDATED (CACHE_MODE + CACR_CINV + CACHE_INVTYPED) |
| #endif |
| |
| #define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \ |
| (0x000f0000) + \ |
| (ACR_ENABLE + ACR_ANY + ACR_CENB + ACR_BWE)) |
| #define ACR1_MODE 0 |
| |
| /****************************************************************************/ |
| #endif /* m52xxsim_h */ |