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1/*
2 * Copyright (C) 2017 SiFive
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include <linux/cacheinfo.h>
15#include <linux/cpu.h>
16#include <linux/of.h>
17#include <linux/of_device.h>
18
19static void ci_leaf_init(struct cacheinfo *this_leaf,
20 struct device_node *node,
21 enum cache_type type, unsigned int level)
22{
23 this_leaf->of_node = node;
24 this_leaf->level = level;
25 this_leaf->type = type;
26 /* not a sector cache */
27 this_leaf->physical_line_partition = 1;
28 /* TODO: Add to DTS */
29 this_leaf->attributes =
30 CACHE_WRITE_BACK
31 | CACHE_READ_ALLOCATE
32 | CACHE_WRITE_ALLOCATE;
33}
34
35static int __init_cache_level(unsigned int cpu)
36{
37 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
38 struct device_node *np = of_cpu_device_node_get(cpu);
39 int levels = 0, leaves = 0, level;
40
41 if (of_property_read_bool(np, "cache-size"))
42 ++leaves;
43 if (of_property_read_bool(np, "i-cache-size"))
44 ++leaves;
45 if (of_property_read_bool(np, "d-cache-size"))
46 ++leaves;
47 if (leaves > 0)
48 levels = 1;
49
50 while ((np = of_find_next_cache_node(np))) {
51 if (!of_device_is_compatible(np, "cache"))
52 break;
53 if (of_property_read_u32(np, "cache-level", &level))
54 break;
55 if (level <= levels)
56 break;
57 if (of_property_read_bool(np, "cache-size"))
58 ++leaves;
59 if (of_property_read_bool(np, "i-cache-size"))
60 ++leaves;
61 if (of_property_read_bool(np, "d-cache-size"))
62 ++leaves;
63 levels = level;
64 }
65
66 this_cpu_ci->num_levels = levels;
67 this_cpu_ci->num_leaves = leaves;
68 return 0;
69}
70
71static int __populate_cache_leaves(unsigned int cpu)
72{
73 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
74 struct cacheinfo *this_leaf = this_cpu_ci->info_list;
75 struct device_node *np = of_cpu_device_node_get(cpu);
76 int levels = 1, level = 1;
77
78 if (of_property_read_bool(np, "cache-size"))
79 ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
80 if (of_property_read_bool(np, "i-cache-size"))
81 ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
82 if (of_property_read_bool(np, "d-cache-size"))
83 ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
84
85 while ((np = of_find_next_cache_node(np))) {
86 if (!of_device_is_compatible(np, "cache"))
87 break;
88 if (of_property_read_u32(np, "cache-level", &level))
89 break;
90 if (level <= levels)
91 break;
92 if (of_property_read_bool(np, "cache-size"))
93 ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
94 if (of_property_read_bool(np, "i-cache-size"))
95 ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
96 if (of_property_read_bool(np, "d-cache-size"))
97 ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
98 levels = level;
99 }
100
101 return 0;
102}
103
104DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
105DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 SiFive
4 */
5
6#include <linux/cacheinfo.h>
7#include <linux/cpu.h>
8#include <linux/of.h>
9#include <linux/of_device.h>
10
11static void ci_leaf_init(struct cacheinfo *this_leaf,
12 struct device_node *node,
13 enum cache_type type, unsigned int level)
14{
15 this_leaf->level = level;
16 this_leaf->type = type;
17}
18
19static int __init_cache_level(unsigned int cpu)
20{
21 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
22 struct device_node *np = of_cpu_device_node_get(cpu);
23 struct device_node *prev = NULL;
24 int levels = 0, leaves = 0, level;
25
26 if (of_property_read_bool(np, "cache-size"))
27 ++leaves;
28 if (of_property_read_bool(np, "i-cache-size"))
29 ++leaves;
30 if (of_property_read_bool(np, "d-cache-size"))
31 ++leaves;
32 if (leaves > 0)
33 levels = 1;
34
35 prev = np;
36 while ((np = of_find_next_cache_node(np))) {
37 of_node_put(prev);
38 prev = np;
39 if (!of_device_is_compatible(np, "cache"))
40 break;
41 if (of_property_read_u32(np, "cache-level", &level))
42 break;
43 if (level <= levels)
44 break;
45 if (of_property_read_bool(np, "cache-size"))
46 ++leaves;
47 if (of_property_read_bool(np, "i-cache-size"))
48 ++leaves;
49 if (of_property_read_bool(np, "d-cache-size"))
50 ++leaves;
51 levels = level;
52 }
53
54 of_node_put(np);
55 this_cpu_ci->num_levels = levels;
56 this_cpu_ci->num_leaves = leaves;
57
58 return 0;
59}
60
61static int __populate_cache_leaves(unsigned int cpu)
62{
63 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
64 struct cacheinfo *this_leaf = this_cpu_ci->info_list;
65 struct device_node *np = of_cpu_device_node_get(cpu);
66 struct device_node *prev = NULL;
67 int levels = 1, level = 1;
68
69 if (of_property_read_bool(np, "cache-size"))
70 ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
71 if (of_property_read_bool(np, "i-cache-size"))
72 ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
73 if (of_property_read_bool(np, "d-cache-size"))
74 ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
75
76 prev = np;
77 while ((np = of_find_next_cache_node(np))) {
78 of_node_put(prev);
79 prev = np;
80 if (!of_device_is_compatible(np, "cache"))
81 break;
82 if (of_property_read_u32(np, "cache-level", &level))
83 break;
84 if (level <= levels)
85 break;
86 if (of_property_read_bool(np, "cache-size"))
87 ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
88 if (of_property_read_bool(np, "i-cache-size"))
89 ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
90 if (of_property_read_bool(np, "d-cache-size"))
91 ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
92 levels = level;
93 }
94 of_node_put(np);
95
96 return 0;
97}
98
99DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
100DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)