blob: 24c58b7dc02265c795000fa997ac96da59207175 [file] [log] [blame]
Paul Mundt3cf6fa12010-04-19 17:27:17 +09001/*
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
Geert Uytterhoevena5f6ea22014-03-03 15:38:33 -080022 ccr = __raw_readl(SH_CCR);
Paul Mundt3cf6fa12010-04-19 17:27:17 +090023
Paul Mundt88253e82010-04-20 15:37:23 +090024 /*
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) {
Paul Mundt3cf6fa12010-04-19 17:27:17 +090028 ccr |= CCR_CACHE_SNM;
29
Paul Mundt88253e82010-04-20 15:37:23 +090030 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
Paul Mundt3cf6fa12010-04-19 17:27:17 +090036#ifdef CONFIG_SMP
37 /*
38 * Broadcast I-cache block invalidations by default.
39 */
40 ccr |= CCR_CACHE_IBE;
41#endif
42
Geert Uytterhoevena5f6ea22014-03-03 15:38:33 -080043 writel_uncached(ccr, SH_CCR);
Paul Mundt3cf6fa12010-04-19 17:27:17 +090044}