1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdlib.h>
#include <cpu/cpu.h>
#include <arch/cache.h>
#include <acpi/acpi.h>
#include <console/console.h>
#define CACHE_NODE_FLAGS 0xd7 // everything valid except, write-policy and allocation type
#define CLUSTER_FLAGS 0x11 // physical package, ID invalid, no thread, no leaf, identical impl.
#define CORE_FLAGS 0x0a // no physical package, ID valid, no thread, leaf.
#define CORE_FLAGS_1 0x12 // no physical package, ID valid, no thread, identical i.
/*
* L2 cache (LLC)
*/
struct pptt_cache l2 = {
.next_level = NULL
};
/*
* L1D cache
*/
struct pptt_cache l1d = {
.next_level = &l2
};
/*
* L1I cache
*/
struct pptt_cache l1i = {
//.sibling = &l1d,
.next_level = &l2
};
/*
* private resources of a cpu core. Same for
* each core, thus we can reuse this struture
* instead of creating it dynamically.
*/
struct pptt_cpu_resources core_resources = {
.cache = &l1i,
};
struct pptt_topology root_topology = {
.flags.raw = CLUSTER_FLAGS,
.resources = NULL,
.sibling = NULL,
.child = &(struct pptt_topology) {
.processor_id = 0,
.flags.raw = CORE_FLAGS_1,
.resources = NULL,
.child = &(struct pptt_topology) {
.processor_id = 0,
.flags.raw = CORE_FLAGS,
.resources = &(struct pptt_cpu_resources) {
.cache = &l1i,
},
.sibling = NULL,
.child = NULL,
},
.sibling = NULL, // updated in runtime
}
};
/* --- Helpers --- */
static u8 cache_attributes(const enum cache_type type)
{
/*
* 'write-policy' and 'allocation type' currently
* unsupported. cache flags set accordingly.
*
* maybe a todo for the future.
*/
u8 attr = 0x0;
if (type == CACHE_INSTRUCTION)
attr |= (0x1 << 2);
else if (type == CACHE_UNIFIED)
attr |= (0x1 << 3);
return attr;
}
/* --- ACPI hook --- */
struct pptt_topology *acpi_get_pptt_topology(void)
{
struct cache_info info;
/* Dump Cache info */
for (int cache_level = CACHE_L1; cache_level <= CACHE_L7; cache_level++) {
int cache_type = cpu_get_cache_type(cache_level);
if (cache_type == NO_CACHE)
continue;
if (cache_type == CACHE_SEPARATE) {
printk(BIOS_DEBUG, "Fetching cache info for: level:%d, type:%d\n",
cache_level, cache_type);
cpu_get_cache_info(cache_level, cache_type, &info);
printk(BIOS_DEBUG, "Size: %lld, associativity: %lld\n", info.size,
info.associativity);
cache_type = CACHE_INSTRUCTION;
printk(BIOS_DEBUG, "Fetching cache info for: level:%d, type:%d\n",
cache_level, cache_type);
cpu_get_cache_info(cache_level, cache_type, &info);
printk(BIOS_DEBUG, "Size: %lld, associativity: %lld\n", info.size,
info.associativity);
cache_type = CACHE_DATA;
}
printk(BIOS_DEBUG, "Fetching cache info for: level:%d, type:%d\n", cache_level,
cache_type);
cpu_get_cache_info(cache_level, cache_type, &info);
printk(BIOS_DEBUG, "Size: %lld, associativity: %lld\n", info.size,
info.associativity);
}
/* update cache information (L1I) */
cpu_get_cache_info(CACHE_L1, CACHE_INSTRUCTION, &info);
l1i.size = info.size;
l1i.associativity = info.associativity;
l1i.numsets = info.numsets;
l1i.line_size = info.line_bytes;
l1i.attributes = cache_attributes(CACHE_INSTRUCTION);
l1i.flags.raw = CACHE_NODE_FLAGS | 0xff;
/* update cache information (L1D) */
cpu_get_cache_info(CACHE_L1, CACHE_DATA, &info);
l1d.size = info.size;
l1d.associativity = info.associativity;
l1d.numsets = info.numsets;
l1d.line_size = info.line_bytes;
l1d.attributes = cache_attributes(CACHE_DATA) | (0x2);
l1d.flags.raw = CACHE_NODE_FLAGS | 0xff;
/* update cache information (L2) */
cpu_get_cache_info(CACHE_L2, CACHE_UNIFIED, &info);
l2.size = info.size;
l2.associativity = info.associativity;
l2.numsets = info.numsets;
l2.line_size = info.line_bytes;
l2.attributes = cache_attributes(CACHE_UNIFIED) | (0x2);
l2.flags.raw = CACHE_NODE_FLAGS | 0xff;
/* add secondary CPUs */
u32 cpu_id = 0;
struct device *dev = NULL;
struct pptt_topology **it = &root_topology.child->sibling;
struct pptt_topology **sibling;
while ((dev = dev_find_path(dev, DEVICE_PATH_GICC_V3))) {
if (cpu_id == 0) {
cpu_id += 1;
continue;
}
if ((*it = malloc(sizeof(struct pptt_topology))) == NULL) {
printk(BIOS_ERR, "Could not allocate pptt structure!\n");
break;
}
memset(*it, 0, sizeof(struct pptt_topology));
(*it)->processor_id = cpu_id;
(*it)->flags.raw = CORE_FLAGS_1;
(*it)->resources = NULL;
//sibling = (*it)->sibling;
sibling = &(*it)->sibling;
it = &(*it)->child;
if ((*it = malloc(sizeof(struct pptt_topology))) == NULL) {
printk(BIOS_ERR, "Could not allocate pptt structure!\n");
break;
}
memset(*it, 0, sizeof(struct pptt_topology));
(*it)->processor_id = cpu_id;
(*it)->flags.raw = CORE_FLAGS;
(*it)->resources = &core_resources;
//it = &(*it)->sibling;
it = sibling;
cpu_id += 1;
}
return &root_topology;
}
|
