arch/m32r/mm/cache.c

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