m54xxacr.h

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/*
 * Bit definitions for the MCF54xx ACR and CACR registers.
 */

#ifndef m54xxacr_h
#define m54xxacr_h

/*
 *  Define the Cache register flags.
 */
#define CACR_DEC    0x80000000  /* Enable data cache */
#define CACR_DWP    0x40000000  /* Data write protection */
#define CACR_DESB   0x20000000  /* Enable data store buffer */
#define CACR_DDPI   0x10000000  /* Disable invalidation by CPUSHL */
#define CACR_DHCLK  0x08000000  /* Half data cache lock mode */
#define CACR_DDCM_WT    0x00000000  /* Write through cache*/
#define CACR_DDCM_CP    0x02000000  /* Copyback cache */
#define CACR_DDCM_P 0x04000000  /* No cache, precise */
#define CACR_DDCM_IMP   0x06000000  /* No cache, imprecise */
#define CACR_DCINVA 0x01000000  /* Invalidate data cache */
#define CACR_BEC    0x00080000  /* Enable branch cache */
#define CACR_BCINVA 0x00040000  /* Invalidate branch cache */
#define CACR_IEC    0x00008000  /* Enable instruction cache */
#define CACR_DNFB   0x00002000  /* Inhibited fill buffer */
#define CACR_IDPI   0x00001000  /* Disable CPUSHL */
#define CACR_IHLCK  0x00000800  /* Intruction cache half lock */
#define CACR_IDCM   0x00000400  /* Intruction cache inhibit */
#define CACR_ICINVA 0x00000100  /* Invalidate instr cache */
#define CACR_EUSP   0x00000020  /* Enable separate user a7 */

#define ACR_BASE_POS    24      /* Address Base */
#define ACR_MASK_POS    16      /* Address Mask */
#define ACR_ENABLE  0x00008000  /* Enable address */
#define ACR_USER    0x00000000  /* User mode access only */
#define ACR_SUPER   0x00002000  /* Supervisor mode only */
#define ACR_ANY     0x00004000  /* Match any access mode */
#define ACR_CM_WT   0x00000000  /* Write through mode */
#define ACR_CM_CP   0x00000020  /* Copyback mode */
#define ACR_CM_OFF_PRE  0x00000040  /* No cache, precise */
#define ACR_CM_OFF_IMP  0x00000060  /* No cache, imprecise */
#define ACR_CM      0x00000060  /* Cache mode mask */
#define ACR_SP      0x00000008  /* Supervisor protect */
#define ACR_WPROTECT    0x00000004  /* Write protect */

#define ACR_BA(x)   ((x) & 0xff000000)
#define ACR_ADMSK(x)    ((((x) - 1) & 0xff000000) >> 8)

#if defined(CONFIG_M5407)

#define ICACHE_SIZE 0x4000  /* instruction - 16k */
#define DCACHE_SIZE 0x2000  /* data - 8k */

#elif defined(CONFIG_M54xx)

#define ICACHE_SIZE 0x8000  /* instruction - 32k */
#define DCACHE_SIZE 0x8000  /* data - 32k */

#elif defined(CONFIG_M5441x)

#define ICACHE_SIZE 0x2000  /* instruction - 8k */
#define DCACHE_SIZE 0x2000  /* data - 8k */
#endif

#define CACHE_LINE_SIZE 0x0010  /* 16 bytes */
#define CACHE_WAYS 4        /* 4 ways */

#define ICACHE_SET_MASK ((ICACHE_SIZE / 64 - 1) << CACHE_WAYS)
#define DCACHE_SET_MASK ((DCACHE_SIZE / 64 - 1) << CACHE_WAYS)
#define ICACHE_MAX_ADDR ICACHE_SET_MASK
#define DCACHE_MAX_ADDR DCACHE_SET_MASK

/*
 *  Version 4 cores have a true harvard style separate instruction
 *  and data cache. Enable data and instruction caches, also enable write
 *  buffers and branch accelerator.
 */
/* attention : enabling CACR_DESB requires a "nop" to flush the store buffer */
/* use '+' instead of '|' for assembler's sake */

    /* Enable data cache */
    /* Enable data store buffer */
    /* outside ACRs : No cache, precise */
    /* Enable instruction+branch caches */
#if defined(CONFIG_M5407)
#define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC)
#else
#define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC+CACR_EUSP)
#endif
#define CACHE_INIT (CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)

#if defined(CONFIG_MMU)
/*
 *  If running with the MMU enabled then we need to map the internal
 *  register region as non-cacheable. And then we map all our RAM as
 *  cacheable and supervisor access only.
 */
#define ACR0_MODE   (ACR_BA(CONFIG_MBAR)+ACR_ADMSK(0x1000000)+ \
             ACR_ENABLE+ACR_SUPER+ACR_CM_OFF_PRE+ACR_SP)
#define ACR1_MODE   (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
             ACR_ENABLE+ACR_SUPER+ACR_SP)
#define ACR2_MODE   0
#define ACR3_MODE   (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
             ACR_ENABLE+ACR_SUPER+ACR_SP)

#else

/*
 *  For the non-MMU enabled case we map all of RAM as cacheable.
 */
#if defined(CONFIG_CACHE_COPYBACK)
#define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_CP)
#else
#define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT)
#endif
#define INSN_CACHE_MODE (ACR_ENABLE+ACR_ANY)

#define CACHE_INVALIDATE  (CACHE_MODE+CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
#define CACHE_INVALIDATEI (CACHE_MODE+CACR_BCINVA+CACR_ICINVA)
#define CACHE_INVALIDATED (CACHE_MODE+CACR_DCINVA)
#define ACR0_MODE   (0x000f0000+DATA_CACHE_MODE)
#define ACR1_MODE   0
#define ACR2_MODE   (0x000f0000+INSN_CACHE_MODE)
#define ACR3_MODE   0

#if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_CP)
/* Copyback cache mode must push dirty cache lines first */
#define CACHE_PUSH
#endif

#endif /* CONFIG_MMU */
#endif  /* m54xxacr_h */