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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) \
9do { \
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
20int init_cache_level(unsigned int cpu)
21{
22 struct cpuinfo_mips *c = &current_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->vcache.waysize) {
39 levels++;
40 leaves++;
41 }
42
43 if (c->scache.waysize) {
44 levels++;
45 leaves++;
46 }
47
48 if (c->tcache.waysize) {
49 levels++;
50 leaves++;
51 }
52
53 this_cpu_ci->num_levels = levels;
54 this_cpu_ci->num_leaves = leaves;
55 return 0;
56}
57
58static void fill_cpumask_siblings(int cpu, cpumask_t *cpu_map)
59{
60 int cpu1;
61
62 for_each_possible_cpu(cpu1)
63 if (cpus_are_siblings(cpu, cpu1))
64 cpumask_set_cpu(cpu1, cpu_map);
65}
66
67static void fill_cpumask_cluster(int cpu, cpumask_t *cpu_map)
68{
69 int cpu1;
70 int cluster = cpu_cluster(&cpu_data[cpu]);
71
72 for_each_possible_cpu(cpu1)
73 if (cpu_cluster(&cpu_data[cpu1]) == cluster)
74 cpumask_set_cpu(cpu1, cpu_map);
75}
76
77int populate_cache_leaves(unsigned int cpu)
78{
79 struct cpuinfo_mips *c = &current_cpu_data;
80 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
81 struct cacheinfo *this_leaf = this_cpu_ci->info_list;
82 int level = 1;
83
84 if (c->icache.waysize) {
85 /* I/D caches are per core */
86 fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
87 populate_cache(dcache, this_leaf, level, CACHE_TYPE_DATA);
88 fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
89 populate_cache(icache, this_leaf, level, CACHE_TYPE_INST);
90 level++;
91 } else {
92 populate_cache(dcache, this_leaf, level, CACHE_TYPE_UNIFIED);
93 level++;
94 }
95
96 if (c->vcache.waysize) {
97 /* Vcache is per core as well */
98 fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map);
99 populate_cache(vcache, this_leaf, level, CACHE_TYPE_UNIFIED);
100 level++;
101 }
102
103 if (c->scache.waysize) {
104 /* Scache is per cluster */
105 fill_cpumask_cluster(cpu, &this_leaf->shared_cpu_map);
106 populate_cache(scache, this_leaf, level, CACHE_TYPE_UNIFIED);
107 level++;
108 }
109
110 if (c->tcache.waysize)
111 populate_cache(tcache, this_leaf, level, CACHE_TYPE_UNIFIED);
112
113 this_cpu_ci->cpu_map_populated = true;
114
115 return 0;
116}