arch/sh/mm/cache-shx3.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

/*
 * 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(CCR);

	if (boot_cpu_data.dcache.n_aliases)
		ccr |= CCR_CACHE_SNM;

#ifdef CONFIG_SMP
	/*
	 * Broadcast I-cache block invalidations by default.
	 */
	ccr |= CCR_CACHE_IBE;
#endif

	writel_uncached(ccr, CCR);
}