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author | Greentime Hu <greentime@andestech.com> | 2017-10-24 15:40:25 +0800 |
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committer | Greentime Hu <greentime@andestech.com> | 2018-02-22 10:44:32 +0800 |
commit | 7de9cf474083bfbba469f72dc208f7b51747632d (patch) | |
tree | 45e8f3f41c736e8a6abc0995aaf5ab8d86bea917 /arch/nds32/kernel | |
parent | 664eec400bf8f3ab4d41279d6fb674a66ff3ba94 (diff) | |
download | linux-7de9cf474083bfbba469f72dc208f7b51747632d.tar.bz2 |
nds32: Cache and TLB routines
This patch contains cache and TLB maintenance functions.
Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/nds32/kernel')
-rw-r--r-- | arch/nds32/kernel/cacheinfo.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/nds32/kernel/cacheinfo.c b/arch/nds32/kernel/cacheinfo.c new file mode 100644 index 000000000000..0a7bc696dd55 --- /dev/null +++ b/arch/nds32/kernel/cacheinfo.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/bitops.h> +#include <linux/cacheinfo.h> +#include <linux/cpu.h> + +static void ci_leaf_init(struct cacheinfo *this_leaf, + enum cache_type type, unsigned int level) +{ + char cache_type = (type & CACHE_TYPE_INST ? ICACHE : DCACHE); + + this_leaf->level = level; + this_leaf->type = type; + this_leaf->coherency_line_size = CACHE_LINE_SIZE(cache_type); + this_leaf->number_of_sets = CACHE_SET(cache_type);; + this_leaf->ways_of_associativity = CACHE_WAY(cache_type); + this_leaf->size = this_leaf->number_of_sets * + this_leaf->coherency_line_size * this_leaf->ways_of_associativity; +#if defined(CONFIG_CPU_DCACHE_WRITETHROUGH) + this_leaf->attributes = CACHE_WRITE_THROUGH; +#else + this_leaf->attributes = CACHE_WRITE_BACK; +#endif +} + +int init_cache_level(unsigned int cpu) +{ + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + + /* Only 1 level and I/D cache seperate. */ + this_cpu_ci->num_levels = 1; + this_cpu_ci->num_leaves = 2; + return 0; +} + +int populate_cache_leaves(unsigned int cpu) +{ + unsigned int level, idx; + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + struct cacheinfo *this_leaf = this_cpu_ci->info_list; + + for (idx = 0, level = 1; level <= this_cpu_ci->num_levels && + idx < this_cpu_ci->num_leaves; idx++, level++) { + ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); + ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); + } + return 0; +} |