1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * MIPS cacheinfo support
4 */
5 #include <linux/cacheinfo.h>
6
7 /* Populates leaf and increments to next leaf */
8 #define populate_cache(cache, leaf, c_level, c_type) \
9 do { \
10 leaf->type = c_type; \
11 leaf->level = c_level; \
12 leaf->coherency_line_size = c->cache.linesz; \
13 leaf->number_of_sets = c->cache.sets; \
14 leaf->ways_of_associativity = c->cache.ways; \
15 leaf->size = c->cache.linesz * c->cache.sets * \
16 c->cache.ways; \
17 leaf++; \
18 } while (0)
19
init_cache_level(unsigned int cpu)20 int init_cache_level(unsigned int cpu)
21 {
22 struct cpuinfo_mips *c = ¤t_cpu_data;
23 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
24 int levels = 0, leaves = 0;
25
26 /*
27 * If Dcache is not set, we assume the cache structures
28 * are not properly initialized.
29 */
30 if (c->dcache.waysize)
31 levels += 1;
32 else
33 return -ENOENT;
34
35
36 leaves += (c->icache.waysize) ? 2 : 1;
37
38 if (c->scache.waysize) {
39 levels++;
40 leaves++;
41 }
42
43 if (c->tcache.waysize) {
44 levels++;
45 leaves++;
46 }
47
48 this_cpu_ci->num_levels = levels;
49 this_cpu_ci->num_leaves = leaves;
50 return 0;
51 }
52
fill_cpumask_siblings(int cpu,cpumask_t * cpu_map)53 static void fill_cpumask_siblings(int cpu, cpumask_t *cpu_map)
54 {
55 int cpu1;
56
57 for_each_possible_cpu(cpu1)
58 if (cpus_are_siblings(cpu, cpu1))
59 cpumask_set_cpu(cpu1, cpu_map);
60 }
61
fill_cpumask_cluster(int cpu,cpumask_t * cpu_map)62 static void fill_cpumask_cluster(int cpu, cpumask_t *cpu_map)
63 {
64 int cpu1;
65 int cluster = cpu_cluster(&cpu_data[cpu]);
66
67 for_each_possible_cpu(cpu1)
68 if (cpu_cluster(&cpu_data[cpu1]) == cluster)
69 cpumask_set_cpu(cpu1, cpu_map);
70 }
71
populate_cache_leaves(unsigned int cpu)72 int populate_cache_leaves(unsigned int cpu)
73 {
74 struct cpuinfo_mips *c = ¤t_cpu_data;
75 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
76 struct cacheinfo *this_leaf = this_cpu_ci->info_list;
77
78 if (c->icache.waysize) {
79 /* L1 caches are per core */
80 fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
81 populate_cache(dcache, this_leaf, 1, CACHE_TYPE_DATA);
82 fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
83 populate_cache(icache, this_leaf, 1, CACHE_TYPE_INST);
84 } else {
85 populate_cache(dcache, this_leaf, 1, CACHE_TYPE_UNIFIED);
86 }
87
88 if (c->scache.waysize) {
89 /* L2 cache is per cluster */
90 fill_cpumask_cluster(cpu, &this_leaf->shared_cpu_map);
91 populate_cache(scache, this_leaf, 2, CACHE_TYPE_UNIFIED);
92 }
93
94 if (c->tcache.waysize)
95 populate_cache(tcache, this_leaf, 3, CACHE_TYPE_UNIFIED);
96
97 this_cpu_ci->cpu_map_populated = true;
98
99 return 0;
100 }
101