arch/m32r/mm/cache.c

   1 /*
   2  *  linux/arch/m32r/mm/cache.c
   3  *
   4  *  Copyright (C) 2002  Hirokazu Takata
   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) || 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 #endif /* CONFIG_CHIP_XNUX2 || CONFIG_CHIP_M32700 */
  30
  31 #ifndef MCCR
  32 #error Unknown cache type.
  33 #endif
  34
  35
  36 /* Copy back and invalidate D-cache and invalidate I-cache all */
  37 void _flush_cache_all(void)
  38 {
  39 #if defined(CONFIG_CHIP_M32102)
  40         *MCCR = MCCR_ICACHE_INV;
  41 #else
  42         unsigned long mccr;
  43
  44         /* Copyback and invalidate D-cache */
  45         /* Invalidate I-cache */
  46         *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;
  47         while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
  48 #endif
  49 }
  50
  51 /* Copy back D-cache and invalidate I-cache all */
  52 void _flush_cache_copyback_all(void)
  53 {
  54 #if defined(CONFIG_CHIP_M32102)
  55         *MCCR = MCCR_ICACHE_INV;
  56 #else
  57         unsigned long mccr;
  58
  59         /* Copyback D-cache */
  60         /* Invalidate I-cache */
  61         *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;
  62         while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
  63
  64 #endif
  65 }