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)		\
20do {								\
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
31static int __init_cache_level(unsigned int cpu)
32{
33	struct cpuinfo_mips *c = &current_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
64static int __populate_cache_leaves(unsigned int cpu)
65{
66	struct cpuinfo_mips *c = &current_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
86DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
87DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)