release/src-rt-6.x.4708/linux/linux-2.6.36/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 <asm/pgtable.h>
   8
   9 #undef MCCR
  10
  11 #if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) || \
  12         defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP)
  13 /* Cache Control Register */
  14 #define MCCR            ((volatile unsigned long*)0xfffffffc)
  15 #define MCCR_CC         (1UL << 7)      /* Cache mode modify bit */
  16 #define MCCR_IIV        (1UL << 6)      /* I-cache invalidate */
  17 #define MCCR_DIV        (1UL << 5)      /* D-cache invalidate */
  18 #define MCCR_DCB        (1UL << 4)      /* D-cache copy back */
  19 #define MCCR_ICM        (1UL << 1)      /* I-cache mode [0:off,1:on] */
  20 #define MCCR_DCM        (1UL << 0)      /* D-cache mode [0:off,1:on] */
  21 #define MCCR_ICACHE_INV         (MCCR_CC|MCCR_IIV)
  22 #define MCCR_DCACHE_CB          (MCCR_CC|MCCR_DCB)
  23 #define MCCR_DCACHE_CBINV       (MCCR_CC|MCCR_DIV|MCCR_DCB)
  24 #define CHECK_MCCR(mccr)        (mccr = *MCCR)
  25 #elif defined(CONFIG_CHIP_M32102)
  26 #define MCCR            ((volatile unsigned char*)0xfffffffe)
  27 #define MCCR_IIV        (1UL << 0)      /* I-cache invalidate */
  28 #define MCCR_ICACHE_INV         MCCR_IIV
  29 #elif defined(CONFIG_CHIP_M32104)
  30 #define MCCR            ((volatile unsigned short*)0xfffffffe)
  31 #define MCCR_IIV        (1UL << 8)      /* I-cache invalidate */
  32 #define MCCR_DIV        (1UL << 9)      /* D-cache invalidate */
  33 #define MCCR_DCB        (1UL << 10)     /* D-cache copy back */
  34 #define MCCR_ICM        (1UL << 0)      /* I-cache mode [0:off,1:on] */
  35 #define MCCR_DCM        (1UL << 1)      /* D-cache mode [0:off,1:on] */
  36 #define MCCR_ICACHE_INV         MCCR_IIV
  37 #define MCCR_DCACHE_CB          MCCR_DCB
  38 #define MCCR_DCACHE_CBINV       (MCCR_DIV|MCCR_DCB)
  39 #endif
  40
  41 #ifndef MCCR
  42 #error Unknown cache type.
  43 #endif
  44
  45
  46 /* Copy back and invalidate D-cache and invalidate I-cache all */
  47 void _flush_cache_all(void)
  48 {
  49 #if defined(CONFIG_CHIP_M32102)
  50         unsigned char mccr;
  51         *MCCR = MCCR_ICACHE_INV;
  52 #elif defined(CONFIG_CHIP_M32104)
  53         unsigned short mccr;
  54
  55         /* Copyback and invalidate D-cache */
  56         /* Invalidate I-cache */
  57         *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV);
  58 #else
  59         unsigned long mccr;
  60
  61         /* Copyback and invalidate D-cache */
  62         /* Invalidate I-cache */
  63         *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;
  64 #endif
  65         while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
  66 }
  67
  68 /* Copy back D-cache and invalidate I-cache all */
  69 void _flush_cache_copyback_all(void)
  70 {
  71 #if defined(CONFIG_CHIP_M32102)
  72         unsigned char mccr;
  73         *MCCR = MCCR_ICACHE_INV;
  74 #elif defined(CONFIG_CHIP_M32104)
  75         unsigned short mccr;
  76
  77         /* Copyback and invalidate D-cache */
  78         /* Invalidate I-cache */
  79         *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB);
  80 #else
  81         unsigned long mccr;
  82
  83         /* Copyback D-cache */
  84         /* Invalidate I-cache */
  85         *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;
  86 #endif
  87         while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
  88 }