1 /* 2 * arch/sh/mm/cache-shx3.c - SH-X3 optimized cache ops 3 * 4 * Copyright (C) 2010 Paul Mundt 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 #include <linux/init.h> 11 #include <linux/kernel.h> 12 #include <linux/io.h> 13 #include <asm/cache.h> 14 15 #define CCR_CACHE_SNM 0x40000 /* Hardware-assisted synonym avoidance */ 16 #define CCR_CACHE_IBE 0x1000000 /* ICBI broadcast */ 17 shx3_cache_init(void)18 void __init shx3_cache_init(void) 19 { 20 unsigned int ccr; 21 22 ccr = __raw_readl(SH_CCR); 23 24 /* 25 * If we've got cache aliases, resolve them in hardware. 26 */ 27 if (boot_cpu_data.dcache.n_aliases || boot_cpu_data.icache.n_aliases) { 28 ccr |= CCR_CACHE_SNM; 29 30 boot_cpu_data.icache.n_aliases = 0; 31 boot_cpu_data.dcache.n_aliases = 0; 32 33 pr_info("Enabling hardware synonym avoidance\n"); 34 } 35 36 #ifdef CONFIG_SMP 37 /* 38 * Broadcast I-cache block invalidations by default. 39 */ 40 ccr |= CCR_CACHE_IBE; 41 #endif 42 43 writel_uncached(ccr, SH_CCR); 44 } 45