45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
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/*
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* arch/sh/mm/cache-shx3.c - SH-X3 optimized cache ops
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*
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* Copyright (C) 2010 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <asm/cache.h>
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#define CCR_CACHE_SNM 0x40000 /* Hardware-assisted synonym avoidance */
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#define CCR_CACHE_IBE 0x1000000 /* ICBI broadcast */
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void __init shx3_cache_init(void)
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{
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unsigned int ccr;
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ccr = __raw_readl(SH_CCR);
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/*
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* If we've got cache aliases, resolve them in hardware.
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*/
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if (boot_cpu_data.dcache.n_aliases || boot_cpu_data.icache.n_aliases) {
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ccr |= CCR_CACHE_SNM;
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boot_cpu_data.icache.n_aliases = 0;
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boot_cpu_data.dcache.n_aliases = 0;
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pr_info("Enabling hardware synonym avoidance\n");
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}
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#ifdef CONFIG_SMP
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/*
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* Broadcast I-cache block invalidations by default.
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*/
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ccr |= CCR_CACHE_IBE;
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#endif
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writel_uncached(ccr, SH_CCR);
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}
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