1 #include <stdint.h>
2 #include <string.h>
3
4 #include <cpuinfo.h>
5 #include <x86/cpuid.h>
6 #include <x86/api.h>
7 #include <cpuinfo/utils.h>
8 #include <cpuinfo/log.h>
9 #include <cpuinfo/common.h>
10
11
12 struct cpuinfo_x86_isa cpuinfo_isa = { 0 };
13 CPUINFO_INTERNAL uint32_t cpuinfo_x86_clflush_size = 0;
14
cpuinfo_x86_init_processor(struct cpuinfo_x86_processor * processor)15 void cpuinfo_x86_init_processor(struct cpuinfo_x86_processor* processor) {
16 const struct cpuid_regs leaf0 = cpuid(0);
17 const uint32_t max_base_index = leaf0.eax;
18 const enum cpuinfo_vendor vendor = processor->vendor =
19 cpuinfo_x86_decode_vendor(leaf0.ebx, leaf0.ecx, leaf0.edx);
20
21 const struct cpuid_regs leaf0x80000000 = cpuid(UINT32_C(0x80000000));
22 const uint32_t max_extended_index =
23 leaf0x80000000.eax >= UINT32_C(0x80000000) ? leaf0x80000000.eax : 0;
24
25 const struct cpuid_regs leaf0x80000001 = max_extended_index >= UINT32_C(0x80000001) ?
26 cpuid(UINT32_C(0x80000001)) : (struct cpuid_regs) { 0, 0, 0, 0 };
27
28 if (max_base_index >= 1) {
29 const struct cpuid_regs leaf1 = cpuid(1);
30 processor->cpuid = leaf1.eax;
31
32 const struct cpuinfo_x86_model_info model_info = cpuinfo_x86_decode_model_info(leaf1.eax);
33 const enum cpuinfo_uarch uarch = processor->uarch =
34 cpuinfo_x86_decode_uarch(vendor, &model_info);
35
36 cpuinfo_x86_clflush_size = ((leaf1.ebx >> 8) & UINT32_C(0x000000FF)) * 8;
37
38 /*
39 * Topology extensions support:
40 * - AMD: ecx[bit 22] in extended info (reserved bit on Intel CPUs).
41 */
42 const bool amd_topology_extensions = !!(leaf0x80000001.ecx & UINT32_C(0x00400000));
43
44 cpuinfo_x86_detect_cache(
45 max_base_index, max_extended_index, amd_topology_extensions, vendor, &model_info,
46 &processor->cache,
47 &processor->tlb.itlb_4KB,
48 &processor->tlb.itlb_2MB,
49 &processor->tlb.itlb_4MB,
50 &processor->tlb.dtlb0_4KB,
51 &processor->tlb.dtlb0_2MB,
52 &processor->tlb.dtlb0_4MB,
53 &processor->tlb.dtlb_4KB,
54 &processor->tlb.dtlb_2MB,
55 &processor->tlb.dtlb_4MB,
56 &processor->tlb.dtlb_1GB,
57 &processor->tlb.stlb2_4KB,
58 &processor->tlb.stlb2_2MB,
59 &processor->tlb.stlb2_1GB,
60 &processor->topology.core_bits_length);
61
62 cpuinfo_x86_detect_topology(max_base_index, max_extended_index, leaf1, &processor->topology);
63
64 cpuinfo_isa = cpuinfo_x86_detect_isa(leaf1, leaf0x80000001,
65 max_base_index, max_extended_index, vendor, uarch);
66 }
67 if (max_extended_index >= UINT32_C(0x80000004)) {
68 struct cpuid_regs brand_string[3];
69 for (uint32_t i = 0; i < 3; i++) {
70 brand_string[i] = cpuid(UINT32_C(0x80000002) + i);
71 }
72 memcpy(processor->brand_string, brand_string, sizeof(processor->brand_string));
73 cpuinfo_log_debug("raw CPUID brand string: \"%48s\"", processor->brand_string);
74 }
75 }
76