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
18void __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