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
__init_cache_level(unsigned int cpu)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
__populate_cache_leaves(unsigned int cpu)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
