arch/m32r/mm/cache.c

   1 /*
   2  *  linux/arch/m32r/mm/cache.c
   3  *
   4  *  Copyright (C) 2002-2005  Hirokazu Takata, Hayato Fujiwara
   5  */
   6
   7 #include <linux/config.h>
   8 #include <asm/pgtable.h>
   9
  10 #undef MCCR
  11
  12 #if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) \
  13         || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP)
  14 /* Cache Control Register */
  15 #define MCCR            ((volatile unsigned long*)0xfffffffc)
  16 #define MCCR_CC         (1UL << 7)      /* Cache mode modify bit */
  17 #define MCCR_IIV        (1UL << 6)      /* I-cache invalidate */
  18 #define MCCR_DIV        (1UL << 5)      /* D-cache invalidate */
  19 #define MCCR_DCB        (1UL << 4)      /* D-cache copy back */
  20 #define MCCR_ICM        (1UL << 1)      /* I-cache mode [0:off,1:on] */
  21 #define MCCR_DCM        (1UL << 0)      /* D-cache mode [0:off,1:on] */
  22 #define MCCR_ICACHE_INV         (MCCR_CC|MCCR_IIV)
  23 #define MCCR_DCACHE_CB          (MCCR_CC|MCCR_DCB)
  24 #define MCCR_DCACHE_CBINV       (MCCR_CC|MCCR_DIV|MCCR_DCB)
  25 #define CHECK_MCCR(mccr)        (mccr = *MCCR)
  26 #elif defined(CONFIG_CHIP_M32102)
  27 #define MCCR            ((volatile unsigned char*)0xfffffffe)
  28 #define MCCR_IIV        (1UL << 0)      /* I-cache invalidate */
  29 #define MCCR_ICACHE_INV         MCCR_IIV
  30 #elif defined(CONFIG_CHIP_M32104)
  31 #define MCCR            ((volatile unsigned short*)0xfffffffe)
  32 #define MCCR_IIV        (1UL << 8)      /* I-cache invalidate */
  33 #define MCCR_DIV        (1UL << 9)      /* D-cache invalidate */
  34 #define MCCR_DCB        (1UL << 10)     /* D-cache copy back */
  35 #define MCCR_ICM        (1UL << 0)      /* I-cache mode [0:off,1:on] */
  36 #define MCCR_DCM        (1UL << 1)      /* D-cache mode [0:off,1:on] */
  37 #define MCCR_ICACHE_INV         MCCR_IIV
  38 #define MCCR_DCACHE_CB          MCCR_DCB
  39 #define MCCR_DCACHE_CBINV       (MCCR_DIV|MCCR_DCB)
  40 #endif
  41
  42 #ifndef MCCR
  43 #error Unknown cache type.
  44 #endif
  45
  46
  47 /* Copy back and invalidate D-cache and invalidate I-cache all */
  48 void _flush_cache_all(void)
  49 {
  50 #if defined(CONFIG_CHIP_M32102)
  51         unsigned char mccr;
  52         *MCCR = MCCR_ICACHE_INV;
  53 #elif defined(CONFIG_CHIP_M32104)
  54         unsigned short mccr;
  55
  56         /* Copyback and invalidate D-cache */
  57         /* Invalidate I-cache */
  58         *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV);
  59 #else
  60         unsigned long mccr;
  61
  62         /* Copyback and invalidate D-cache */
  63         /* Invalidate I-cache */
  64         *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;
  65 #endif
  66         while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
  67 }
  68
  69 /* Copy back D-cache and invalidate I-cache all */
  70 void _flush_cache_copyback_all(void)
  71 {
  72 #if defined(CONFIG_CHIP_M32102)
  73         unsigned char mccr;
  74         *MCCR = MCCR_ICACHE_INV;
  75 #elif defined(CONFIG_CHIP_M32104)
  76         unsigned short mccr;
  77
  78         /* Copyback and invalidate D-cache */
  79         /* Invalidate I-cache */
  80         *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB);
  81 #else
  82         unsigned long mccr;
  83
  84         /* Copyback D-cache */
  85         /* Invalidate I-cache */
  86         *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;
  87 #endif
  88         while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
  89 }