cache.c

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/*
 *  linux/arch/m32r/mm/cache.c
 *
 *  Copyright (C) 2002-2005  Hirokazu Takata, Hayato Fujiwara
 */

#include <asm/pgtable.h>

#undef MCCR

#if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) \
    || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP)
/* Cache Control Register */
#define MCCR        ((volatile unsigned long*)0xfffffffc)
#define MCCR_CC     (1UL << 7)  /* Cache mode modify bit */
#define MCCR_IIV    (1UL << 6)  /* I-cache invalidate */
#define MCCR_DIV    (1UL << 5)  /* D-cache invalidate */
#define MCCR_DCB    (1UL << 4)  /* D-cache copy back */
#define MCCR_ICM    (1UL << 1)  /* I-cache mode [0:off,1:on] */
#define MCCR_DCM    (1UL << 0)  /* D-cache mode [0:off,1:on] */
#define MCCR_ICACHE_INV     (MCCR_CC|MCCR_IIV)
#define MCCR_DCACHE_CB      (MCCR_CC|MCCR_DCB)
#define MCCR_DCACHE_CBINV   (MCCR_CC|MCCR_DIV|MCCR_DCB)
#define CHECK_MCCR(mccr)    (mccr = *MCCR)
#elif defined(CONFIG_CHIP_M32102)
#define MCCR        ((volatile unsigned char*)0xfffffffe)
#define MCCR_IIV    (1UL << 0)  /* I-cache invalidate */
#define MCCR_ICACHE_INV     MCCR_IIV
#elif defined(CONFIG_CHIP_M32104)
#define MCCR        ((volatile unsigned short*)0xfffffffe)
#define MCCR_IIV    (1UL << 8)  /* I-cache invalidate */
#define MCCR_DIV    (1UL << 9)  /* D-cache invalidate */
#define MCCR_DCB    (1UL << 10) /* D-cache copy back */
#define MCCR_ICM    (1UL << 0)  /* I-cache mode [0:off,1:on] */
#define MCCR_DCM    (1UL << 1)  /* D-cache mode [0:off,1:on] */
#define MCCR_ICACHE_INV     MCCR_IIV
#define MCCR_DCACHE_CB      MCCR_DCB
#define MCCR_DCACHE_CBINV   (MCCR_DIV|MCCR_DCB)
#endif

#ifndef MCCR
#error Unknown cache type.
#endif


/* Copy back and invalidate D-cache and invalidate I-cache all */
void _flush_cache_all(void)
{
#if defined(CONFIG_CHIP_M32102)
    unsigned char mccr;
    *MCCR = MCCR_ICACHE_INV;
#elif defined(CONFIG_CHIP_M32104)
    unsigned short mccr;

    /* Copyback and invalidate D-cache */
    /* Invalidate I-cache */
    *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV);
#else
    unsigned long mccr;

    /* Copyback and invalidate D-cache */
    /* Invalidate I-cache */
    *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;
#endif
    while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
}

/* Copy back D-cache and invalidate I-cache all */
void _flush_cache_copyback_all(void)
{
#if defined(CONFIG_CHIP_M32102)
    unsigned char mccr;
    *MCCR = MCCR_ICACHE_INV;
#elif defined(CONFIG_CHIP_M32104)
    unsigned short mccr;

    /* Copyback and invalidate D-cache */
    /* Invalidate I-cache */
    *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB);
#else
    unsigned long mccr;

    /* Copyback D-cache */
    /* Invalidate I-cache */
    *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;
#endif
    while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
}