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