1 /* 2 * MIPS cacheinfo support 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 9 * kind, whether express or implied; without even the implied warranty 10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 #include <linux/cacheinfo.h> 17 18 /* Populates leaf and increments to next leaf */ 19 #define populate_cache(cache, leaf, c_level, c_type) \ 20 leaf->type = c_type; \ 21 leaf->level = c_level; \ 22 leaf->coherency_line_size = c->cache.linesz; \ 23 leaf->number_of_sets = c->cache.sets; \ 24 leaf->ways_of_associativity = c->cache.ways; \ 25 leaf->size = c->cache.linesz * c->cache.sets * \ 26 c->cache.ways; \ 27 leaf++; 28 29 static int __init_cache_level(unsigned int cpu) 30 { 31 struct cpuinfo_mips *c = ¤t_cpu_data; 32 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); 33 int levels = 0, leaves = 0; 34 35 /* 36 * If Dcache is not set, we assume the cache structures 37 * are not properly initialized. 38 */ 39 if (c->dcache.waysize) 40 levels += 1; 41 else 42 return -ENOENT; 43 44 45 leaves += (c->icache.waysize) ? 2 : 1; 46 47 if (c->scache.waysize) { 48 levels++; 49 leaves++; 50 } 51 52 if (c->tcache.waysize) { 53 levels++; 54 leaves++; 55 } 56 57 this_cpu_ci->num_levels = levels; 58 this_cpu_ci->num_leaves = leaves; 59 return 0; 60 } 61 62 static int __populate_cache_leaves(unsigned int cpu) 63 { 64 struct cpuinfo_mips *c = ¤t_cpu_data; 65 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); 66 struct cacheinfo *this_leaf = this_cpu_ci->info_list; 67 68 if (c->icache.waysize) { 69 populate_cache(dcache, this_leaf, 1, CACHE_TYPE_DATA); 70 populate_cache(icache, this_leaf, 1, CACHE_TYPE_INST); 71 } else { 72 populate_cache(dcache, this_leaf, 1, CACHE_TYPE_UNIFIED); 73 } 74 75 if (c->scache.waysize) 76 populate_cache(scache, this_leaf, 2, CACHE_TYPE_UNIFIED); 77 78 if (c->tcache.waysize) 79 populate_cache(tcache, this_leaf, 3, CACHE_TYPE_UNIFIED); 80 81 return 0; 82 } 83 84 DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level) 85 DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves) 86