arch/m68k/include/asm/m54xxacr.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Bit definitions for the MCF54xx ACR and CACR registers.
   4  */
   5
   6 #ifndef m54xxacr_h
   7 #define m54xxacr_h
   8
   9 /*
  10  *      Define the Cache register flags.
  11  */
  12 #define CACR_DEC        0x80000000      /* Enable data cache */
  13 #define CACR_DWP        0x40000000      /* Data write protection */
  14 #define CACR_DESB       0x20000000      /* Enable data store buffer */
  15 #define CACR_DDPI       0x10000000      /* Disable invalidation by CPUSHL */
  16 #define CACR_DHCLK      0x08000000      /* Half data cache lock mode */
  17 #define CACR_DDCM_WT    0x00000000      /* Write through cache*/
  18 #define CACR_DDCM_CP    0x02000000      /* Copyback cache */
  19 #define CACR_DDCM_P     0x04000000      /* No cache, precise */
  20 #define CACR_DDCM_IMP   0x06000000      /* No cache, imprecise */
  21 #define CACR_DCINVA     0x01000000      /* Invalidate data cache */
  22 #define CACR_BEC        0x00080000      /* Enable branch cache */
  23 #define CACR_BCINVA     0x00040000      /* Invalidate branch cache */
  24 #define CACR_IEC        0x00008000      /* Enable instruction cache */
  25 #define CACR_DNFB       0x00002000      /* Inhibited fill buffer */
  26 #define CACR_IDPI       0x00001000      /* Disable CPUSHL */
  27 #define CACR_IHLCK      0x00000800      /* Instruction cache half lock */
  28 #define CACR_IDCM       0x00000400      /* Instruction cache inhibit */
  29 #define CACR_ICINVA     0x00000100      /* Invalidate instr cache */
  30 #define CACR_EUSP       0x00000020      /* Enable separate user a7 */
  31
  32 #define ACR_BASE_POS    24              /* Address Base */
  33 #define ACR_MASK_POS    16              /* Address Mask */
  34 #define ACR_ENABLE      0x00008000      /* Enable address */
  35 #define ACR_USER        0x00000000      /* User mode access only */
  36 #define ACR_SUPER       0x00002000      /* Supervisor mode only */
  37 #define ACR_ANY         0x00004000      /* Match any access mode */
  38 #define ACR_CM_WT       0x00000000      /* Write through mode */
  39 #define ACR_CM_CP       0x00000020      /* Copyback mode */
  40 #define ACR_CM_OFF_PRE  0x00000040      /* No cache, precise */
  41 #define ACR_CM_OFF_IMP  0x00000060      /* No cache, imprecise */
  42 #define ACR_CM          0x00000060      /* Cache mode mask */
  43 #define ACR_SP          0x00000008      /* Supervisor protect */
  44 #define ACR_WPROTECT    0x00000004      /* Write protect */
  45
  46 #define ACR_BA(x)       ((x) & 0xff000000)
  47 #define ACR_ADMSK(x)    ((((x) - 1) & 0xff000000) >> 8)
  48
  49 #if defined(CONFIG_M5407)
  50
  51 #define ICACHE_SIZE 0x4000      /* instruction - 16k */
  52 #define DCACHE_SIZE 0x2000      /* data - 8k */
  53
  54 #elif defined(CONFIG_M54xx)
  55
  56 #define ICACHE_SIZE 0x8000      /* instruction - 32k */
  57 #define DCACHE_SIZE 0x8000      /* data - 32k */
  58
  59 #elif defined(CONFIG_M5441x)
  60
  61 #define ICACHE_SIZE 0x2000      /* instruction - 8k */
  62 #define DCACHE_SIZE 0x2000      /* data - 8k */
  63 #endif
  64
  65 #define CACHE_LINE_SIZE 0x0010  /* 16 bytes */
  66 #define CACHE_WAYS 4            /* 4 ways */
  67
  68 #define ICACHE_SET_MASK ((ICACHE_SIZE / 64 - 1) << CACHE_WAYS)
  69 #define DCACHE_SET_MASK ((DCACHE_SIZE / 64 - 1) << CACHE_WAYS)
  70 #define ICACHE_MAX_ADDR ICACHE_SET_MASK
  71 #define DCACHE_MAX_ADDR DCACHE_SET_MASK
  72
  73 /*
  74  *      Version 4 cores have a true harvard style separate instruction
  75  *      and data cache. Enable data and instruction caches, also enable write
  76  *      buffers and branch accelerator.
  77  */
  78 /* attention : enabling CACR_DESB requires a "nop" to flush the store buffer */
  79 /* use '+' instead of '|' for assembler's sake */
  80
  81         /* Enable data cache */
  82         /* Enable data store buffer */
  83         /* outside ACRs : No cache, precise */
  84         /* Enable instruction+branch caches */
  85 #if defined(CONFIG_M5407)
  86 #define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC)
  87 #else
  88 #define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC+CACR_EUSP)
  89 #endif
  90 #define CACHE_INIT (CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
  91
  92 #if defined(CONFIG_MMU)
  93 /*
  94  *      If running with the MMU enabled then we need to map the internal
  95  *      register region as non-cacheable. And then we map all our RAM as
  96  *      cacheable and supervisor access only.
  97  */
  98 #define ACR0_MODE       (ACR_BA(IOMEMBASE)+ACR_ADMSK(IOMEMSIZE)+ \
  99                          ACR_ENABLE+ACR_SUPER+ACR_CM_OFF_PRE+ACR_SP)
 100 #if defined(CONFIG_CACHE_COPYBACK)
 101 #define ACR1_MODE       (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
 102                          ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_CP)
 103 #else
 104 #define ACR1_MODE       (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
 105                          ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_WT)
 106 #endif
 107 #define ACR2_MODE       0
 108 #define ACR3_MODE       (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
 109                          ACR_ENABLE+ACR_SUPER+ACR_SP)
 110
 111 #else
 112
 113 /*
 114  *      For the non-MMU enabled case we map all of RAM as cacheable.
 115  */
 116 #if defined(CONFIG_CACHE_COPYBACK)
 117 #define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_CP)
 118 #else
 119 #define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT)
 120 #endif
 121 #define INSN_CACHE_MODE (ACR_ENABLE+ACR_ANY)
 122
 123 #define CACHE_INVALIDATE  (CACHE_MODE+CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
 124 #define CACHE_INVALIDATEI (CACHE_MODE+CACR_BCINVA+CACR_ICINVA)
 125 #define CACHE_INVALIDATED (CACHE_MODE+CACR_DCINVA)
 126 #define ACR0_MODE       (0x000f0000+DATA_CACHE_MODE)
 127 #define ACR1_MODE       0
 128 #define ACR2_MODE       (0x000f0000+INSN_CACHE_MODE)
 129 #define ACR3_MODE       0
 130
 131 #if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_CP)
 132 /* Copyback cache mode must push dirty cache lines first */
 133 #define CACHE_PUSH
 134 #endif
 135
 136 #endif /* CONFIG_MMU */
 137 #endif  /* m54xxacr_h */