projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | } |