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
|
#include <stdint.h>
#include <cpuinfo.h>
#include <utils.h>
#include <log.h>
#include <x86/cpuid.h>
#include <x86/api.h>
union cpuinfo_x86_cache_descriptors {
struct cpuid_regs regs;
uint8_t as_bytes[16];
};
enum cache_type {
cache_type_none = 0,
cache_type_data = 1,
cache_type_instruction = 2,
cache_type_unified = 3,
};
void cpuinfo_x86_detect_cache(
uint32_t max_base_index, uint32_t max_extended_index,
bool amd_topology_extensions,
enum cpuinfo_vendor vendor,
const struct cpuinfo_x86_model_info* model_info,
struct cpuinfo_x86_caches* cache,
struct cpuinfo_tlb* itlb_4KB,
struct cpuinfo_tlb* itlb_2MB,
struct cpuinfo_tlb* itlb_4MB,
struct cpuinfo_tlb* dtlb0_4KB,
struct cpuinfo_tlb* dtlb0_2MB,
struct cpuinfo_tlb* dtlb0_4MB,
struct cpuinfo_tlb* dtlb_4KB,
struct cpuinfo_tlb* dtlb_2MB,
struct cpuinfo_tlb* dtlb_4MB,
struct cpuinfo_tlb* dtlb_1GB,
struct cpuinfo_tlb* stlb2_4KB,
struct cpuinfo_tlb* stlb2_2MB,
struct cpuinfo_tlb* stlb2_1GB,
uint32_t* log2_package_cores_max)
{
if (max_base_index >= 2) {
union cpuinfo_x86_cache_descriptors descriptors;
descriptors.regs = cpuid(2);
uint32_t iterations = (uint8_t) descriptors.as_bytes[0];
if (iterations != 0) {
iterate_descriptors:
for (uint32_t i = 1 /* note: not 0 */; i < 16; i++) {
const uint8_t descriptor = descriptors.as_bytes[i];
if (descriptor != 0) {
cpuinfo_x86_decode_cache_descriptor(
descriptor, vendor, model_info,
cache,
itlb_4KB, itlb_2MB, itlb_4MB,
dtlb0_4KB, dtlb0_2MB, dtlb0_4MB,
dtlb_4KB, dtlb_2MB, dtlb_4MB, dtlb_1GB,
stlb2_4KB, stlb2_2MB, stlb2_1GB,
&cache->prefetch_size);
}
}
if (--iterations != 0) {
descriptors.regs = cpuid(2);
goto iterate_descriptors;
}
}
if (vendor != cpuinfo_vendor_amd && max_base_index >= 4) {
struct cpuid_regs leaf4;
uint32_t input_ecx = 0;
uint32_t package_cores_max = 0;
do {
leaf4 = cpuidex(4, input_ecx++);
} while (cpuinfo_x86_decode_deterministic_cache_parameters(
leaf4, cache, &package_cores_max));
if (package_cores_max != 0) {
*log2_package_cores_max = bit_length(package_cores_max);
}
}
}
if (amd_topology_extensions && max_extended_index >= UINT32_C(0x8000001D)) {
struct cpuid_regs leaf0x8000001D;
uint32_t input_ecx = 0;
do {
leaf0x8000001D = cpuidex(UINT32_C(0x8000001D), input_ecx++);
} while (cpuinfo_x86_decode_cache_properties(leaf0x8000001D, cache));
}
}
|
