Release 4.14 arch/mips/kernel/cacheinfo.c

/*
 * MIPS cacheinfo support
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#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)



static int __init_cache_level(unsigned int cpu)
{
	struct cpuinfo_mips *c = &current_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->scache.waysize) {
		levels++;
		leaves++;
	}

	if (c->tcache.waysize) {
		levels++;
		leaves++;
	}

	this_cpu_ci->num_levels = levels;
	this_cpu_ci->num_leaves = leaves;
	return 0;
}

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static int __populate_cache_leaves(unsigned int cpu)
{
	struct cpuinfo_mips *c = &current_cpu_data;
	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
	struct cacheinfo *this_leaf = this_cpu_ci->info_list;

	if (c->icache.waysize) {
		populate_cache(dcache, this_leaf, 1, CACHE_TYPE_DATA);
		populate_cache(icache, this_leaf, 1, CACHE_TYPE_INST);
	} else {
		populate_cache(dcache, this_leaf, 1, CACHE_TYPE_UNIFIED);
	}

	if (c->scache.waysize)
		populate_cache(scache, this_leaf, 2, CACHE_TYPE_UNIFIED);

	if (c->tcache.waysize)
		populate_cache(tcache, this_leaf, 3, CACHE_TYPE_UNIFIED);

	return 0;
}

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DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)
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Directory: arch/mips/kernel

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