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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/m32r/mm/cache.c
10817 views
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/*

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

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 *

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 *  Copyright (C) 2002-2005  Hirokazu Takata, Hayato Fujiwara

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 */

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#include <asm/pgtable.h>

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#undef MCCR

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#if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) \

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	|| defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP)

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/* Cache Control Register */

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#define MCCR		((volatile unsigned long*)0xfffffffc)

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#define MCCR_CC		(1UL << 7)	/* Cache mode modify bit */

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#define MCCR_IIV	(1UL << 6)	/* I-cache invalidate */

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#define MCCR_DIV	(1UL << 5)	/* D-cache invalidate */

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#define MCCR_DCB	(1UL << 4)	/* D-cache copy back */

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#define MCCR_ICM	(1UL << 1)	/* I-cache mode [0:off,1:on] */

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#define MCCR_DCM	(1UL << 0)	/* D-cache mode [0:off,1:on] */

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#define MCCR_ICACHE_INV		(MCCR_CC|MCCR_IIV)

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#define MCCR_DCACHE_CB		(MCCR_CC|MCCR_DCB)

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#define MCCR_DCACHE_CBINV	(MCCR_CC|MCCR_DIV|MCCR_DCB)

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#define CHECK_MCCR(mccr)	(mccr = *MCCR)

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#elif defined(CONFIG_CHIP_M32102)

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#define MCCR		((volatile unsigned char*)0xfffffffe)

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#define MCCR_IIV	(1UL << 0)	/* I-cache invalidate */

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#define MCCR_ICACHE_INV		MCCR_IIV

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#elif defined(CONFIG_CHIP_M32104)

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#define MCCR		((volatile unsigned short*)0xfffffffe)

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#define MCCR_IIV	(1UL << 8)	/* I-cache invalidate */

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#define MCCR_DIV	(1UL << 9)	/* D-cache invalidate */

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#define MCCR_DCB	(1UL << 10)	/* D-cache copy back */

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#define MCCR_ICM	(1UL << 0)	/* I-cache mode [0:off,1:on] */

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#define MCCR_DCM	(1UL << 1)	/* D-cache mode [0:off,1:on] */

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#define MCCR_ICACHE_INV		MCCR_IIV

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#define MCCR_DCACHE_CB		MCCR_DCB

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#define MCCR_DCACHE_CBINV	(MCCR_DIV|MCCR_DCB)

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#endif

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#ifndef MCCR

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#error Unknown cache type.

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#endif

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/* Copy back and invalidate D-cache and invalidate I-cache all */

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void _flush_cache_all(void)

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{

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#if defined(CONFIG_CHIP_M32102)

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	unsigned char mccr;

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	*MCCR = MCCR_ICACHE_INV;

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#elif defined(CONFIG_CHIP_M32104)

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	unsigned short mccr;

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	/* Copyback and invalidate D-cache */

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	/* Invalidate I-cache */

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	*MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV);

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#else

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	unsigned long mccr;

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	/* Copyback and invalidate D-cache */

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	/* Invalidate I-cache */

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	*MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;

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#endif

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	while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */

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}

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/* Copy back D-cache and invalidate I-cache all */

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void _flush_cache_copyback_all(void)

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{

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#if defined(CONFIG_CHIP_M32102)

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	unsigned char mccr;

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	*MCCR = MCCR_ICACHE_INV;

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#elif defined(CONFIG_CHIP_M32104)

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	unsigned short mccr;

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	/* Copyback and invalidate D-cache */

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	/* Invalidate I-cache */

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	*MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB);

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#else

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	unsigned long mccr;

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	/* Copyback D-cache */

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	/* Invalidate I-cache */

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	*MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;

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#endif

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	while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */

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}

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