| /****************************************************************************/ |
| |
| /* |
| * 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 CACR_CINVA |
| #define CACHE_INVALIDATE CACR_CINVA |
| #define CACHE_INVALIDATED CACR_CINVA |
| |
| #define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \ |
| (0x000f0000) + \ |
| (ACR_ENABLE + ACR_ANY + CACHE_TYPE)) |
| #define ACR1_MODE 0 |
| |
| /****************************************************************************/ |
| #endif /* m53xxsim_h */ |
