LXR linux/arch/m32r/mm/cache.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  linux/arch/m32r/mm/cache.c
   4 *
   5 *  Copyright (C) 2002-2005  Hirokazu Takata, Hayato Fujiwara
   6 */
   7
   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 */
  48void _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 */
  70void _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}
  90