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 do { \ 21 leaf->type = c_type; \ 22 leaf->level = c_level; \ 23 leaf->coherency_line_size = c->cache.linesz; \ 24 leaf->number_of_sets = c->cache.sets; \ 25 leaf->ways_of_associativity = c->cache.ways; \ 26 leaf->size = c->cache.linesz * c->cache.sets * \ 27 c->cache.ways; \ 28 leaf++; \ 29 } while (0) 30 31 static int __init_cache_level(unsigned int cpu) 32 { 33 struct cpuinfo_mips *c = ¤t_cpu_data; 34 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); 35 int levels = 0, leaves = 0; 36 37 /* 38 * If Dcache is not set, we assume the cache structures 39 * are not properly initialized. 40 */ 41 if (c->dcache.waysize) 42 levels += 1; 43 else 44 return -ENOENT; 45 46 47 leaves += (c->icache.waysize) ? 2 : 1; 48 49 if (c->scache.waysize) { 50 levels++; 51 leaves++; 52 } 53 54 if (c->tcache.waysize) { 55 levels++; 56 leaves++; 57 } 58 59 this_cpu_ci->num_levels = levels; 60 this_cpu_ci->num_leaves = leaves; 61 return 0; 62 } 63 64 static int __populate_cache_leaves(unsigned int cpu) 65 { 66 struct cpuinfo_mips *c = ¤t_cpu_data; 67 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); 68 struct cacheinfo *this_leaf = this_cpu_ci->info_list; 69 70 if (c->icache.waysize) { 71 populate_cache(dcache, this_leaf, 1, CACHE_TYPE_DATA); 72 populate_cache(icache, this_leaf, 1, CACHE_TYPE_INST); 73 } else { 74 populate_cache(dcache, this_leaf, 1, CACHE_TYPE_UNIFIED); 75 } 76 77 if (c->scache.waysize) 78 populate_cache(scache, this_leaf, 2, CACHE_TYPE_UNIFIED); 79 80 if (c->tcache.waysize) 81 populate_cache(tcache, this_leaf, 3, CACHE_TYPE_UNIFIED); 82 83 return 0; 84 } 85 86 DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level) 87 DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves) 88