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44 lines
1.0 KiB
44 lines
1.0 KiB
/* |
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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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