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review.trustedfirmware.org / hafnium / third_party / linux.git / 0f672f6c0b52b7b0700b0915c72b540721af4465 / . / arch / riscv / kernel / cacheinfo.c
blob: 4c90c07d8c39d7557d6ad580924ac788032ec2f8 [file] [log] [blame]
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0-only
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]2/*
3 * Copyright (C) 2017 SiFive
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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);
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]23 struct device_node *prev = NULL;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]35 prev = np;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]36 while ((np = of_find_next_cache_node(np))) {
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]37 of_node_put(prev);
38 prev = np;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]54 of_node_put(np);
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]55 this_cpu_ci->num_levels = levels;
56 this_cpu_ci->num_leaves = leaves;
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]57
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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);
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]66 struct device_node *prev = NULL;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]76 prev = np;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]77 while ((np = of_find_next_cache_node(np))) {
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]78 of_node_put(prev);
79 prev = np;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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 }
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]94 of_node_put(np);
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]95
96 return 0;
97}
98
99DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
100DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)