cache-shx3.c
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/*
* 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);
}