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Diffstat (limited to '')
| -rw-r--r-- | arch/m68k/include/asm/m53xxacr.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/m53xxacr.h b/arch/m68k/include/asm/m53xxacr.h new file mode 100644 index 000000000000..cd952b0a8bd3 --- /dev/null +++ b/arch/m68k/include/asm/m53xxacr.h @@ -0,0 +1,101 @@ +/****************************************************************************/ + +/* + * 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_M532x) +#define CACHE_SIZE 0x4000 /* 32k 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 */ |