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3cf6fa1e PM |
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 | ||
18 | void __init shx3_cache_init(void) | |
19 | { | |
20 | unsigned int ccr; | |
21 | ||
a5f6ea29 | 22 | ccr = __raw_readl(SH_CCR); |
3cf6fa1e | 23 | |
88253e84 PM |
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) { | |
3cf6fa1e PM |
28 | ccr |= CCR_CACHE_SNM; |
29 | ||
88253e84 PM |
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 | ||
3cf6fa1e PM |
36 | #ifdef CONFIG_SMP |
37 | /* | |
38 | * Broadcast I-cache block invalidations by default. | |
39 | */ | |
40 | ccr |= CCR_CACHE_IBE; | |
41 | #endif | |
42 | ||
a5f6ea29 | 43 | writel_uncached(ccr, SH_CCR); |
3cf6fa1e | 44 | } |