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 | |
22 | ccr = __raw_readl(addr: 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 | |