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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117// SPDX-License-Identifier: GPL-2.0-only/* * MIPS cacheinfo support */#include <linux/cacheinfo.h>
/* Populates leaf and increments to next leaf */#define populate_cache(cache, leaf, c_level, c_type) \do { \ leaf->type = c_type; \ leaf->level = c_level; \ leaf->coherency_line_size = c->cache.linesz; \ leaf->number_of_sets = c->cache.sets; \ leaf->ways_of_associativity = c->cache.ways; \ leaf->size = c->cache.linesz * c->cache.sets * \ c->cache.ways; \ leaf++; \} while (0)
int init_cache_level(unsigned int cpu){ struct cpuinfo_mips *c = ¤t_cpu_data; struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); int levels = 0, leaves = 0;
/* * If Dcache is not set, we assume the cache structures * are not properly initialized. */ if (c->dcache.waysize) levels += 1; else return -ENOENT;
leaves += (c->icache.waysize) ? 2 : 1;
if (c->vcache.waysize) { levels++; leaves++; }
if (c->scache.waysize) { levels++; leaves++; }
if (c->tcache.waysize) { levels++; leaves++; }
this_cpu_ci->num_levels = levels; this_cpu_ci->num_leaves = leaves; return 0;}
static void fill_cpumask_siblings(int cpu, cpumask_t *cpu_map){ int cpu1;
for_each_possible_cpu(cpu1) if (cpus_are_siblings(cpu, cpu1)) cpumask_set_cpu(cpu1, cpu_map);}
static void fill_cpumask_cluster(int cpu, cpumask_t *cpu_map){ int cpu1; int cluster = cpu_cluster(&cpu_data[cpu]);
for_each_possible_cpu(cpu1) if (cpu_cluster(&cpu_data[cpu1]) == cluster) cpumask_set_cpu(cpu1, cpu_map);}
int populate_cache_leaves(unsigned int cpu){ struct cpuinfo_mips *c = ¤t_cpu_data; struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); struct cacheinfo *this_leaf = this_cpu_ci->info_list; int level = 1;
if (c->icache.waysize) { /* I/D caches are per core */ fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map); populate_cache(dcache, this_leaf, level, CACHE_TYPE_DATA); fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map); populate_cache(icache, this_leaf, level, CACHE_TYPE_INST); level++; } else { populate_cache(dcache, this_leaf, level, CACHE_TYPE_UNIFIED); level++; }
if (c->vcache.waysize) { /* Vcache is per core as well */ fill_cpumask_siblings(cpu, &this_leaf->shared_cpu_map); populate_cache(vcache, this_leaf, level, CACHE_TYPE_UNIFIED); level++; }
if (c->scache.waysize) { /* Scache is per cluster */ fill_cpumask_cluster(cpu, &this_leaf->shared_cpu_map); populate_cache(scache, this_leaf, level, CACHE_TYPE_UNIFIED); level++; }
if (c->tcache.waysize) populate_cache(tcache, this_leaf, level, CACHE_TYPE_UNIFIED);
this_cpu_ci->cpu_map_populated = true;
return 0;}