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66 lines
1.8 KiB
66 lines
1.8 KiB
20 years ago
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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 Hirokazu Takata
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*/
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#include <linux/config.h>
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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) || 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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#endif /* CONFIG_CHIP_XNUX2 || CONFIG_CHIP_M32700 */
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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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*MCCR = MCCR_ICACHE_INV;
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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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while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
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#endif
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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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*MCCR = MCCR_ICACHE_INV;
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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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while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
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#endif
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}
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