1 #include <stdint.h>
2 #include <string.h>
3
4 #include <cpuinfo.h>
5 #include <cpuinfo/common.h>
6 #include <cpuinfo/log.h>
7 #include <cpuinfo/utils.h>
8 #include <x86/api.h>
9 #include <x86/cpuid.h>
10
11 struct cpuinfo_x86_isa cpuinfo_isa = {0};
12 CPUINFO_INTERNAL uint32_t cpuinfo_x86_clflush_size = 0;
13
cpuinfo_x86_init_processor(struct cpuinfo_x86_processor * processor)14 void cpuinfo_x86_init_processor(struct cpuinfo_x86_processor* processor) {
15 const struct cpuid_regs leaf0 = cpuid(0);
16 const uint32_t max_base_index = leaf0.eax;
17 const enum cpuinfo_vendor vendor = processor->vendor =
18 cpuinfo_x86_decode_vendor(leaf0.ebx, leaf0.ecx, leaf0.edx);
19
20 const struct cpuid_regs leaf0x80000000 = cpuid(UINT32_C(0x80000000));
21 const uint32_t max_extended_index = leaf0x80000000.eax >= UINT32_C(0x80000000) ? leaf0x80000000.eax : 0;
22
23 const struct cpuid_regs leaf0x80000001 = max_extended_index >= UINT32_C(0x80000001)
24 ? cpuid(UINT32_C(0x80000001))
25 : (struct cpuid_regs){0, 0, 0, 0};
26
27 if (max_base_index >= 1) {
28 const struct cpuid_regs leaf1 = cpuid(1);
29 processor->cpuid = leaf1.eax;
30
31 const struct cpuinfo_x86_model_info model_info = cpuinfo_x86_decode_model_info(leaf1.eax);
32 const enum cpuinfo_uarch uarch = processor->uarch = cpuinfo_x86_decode_uarch(vendor, &model_info);
33
34 cpuinfo_x86_clflush_size = ((leaf1.ebx >> 8) & UINT32_C(0x000000FF)) * 8;
35
36 /*
37 * Topology extensions support:
38 * - AMD: ecx[bit 22] in extended info (reserved bit on Intel
39 * CPUs).
40 */
41 const bool amd_topology_extensions = !!(leaf0x80000001.ecx & UINT32_C(0x00400000));
42
43 cpuinfo_x86_detect_cache(
44 max_base_index,
45 max_extended_index,
46 amd_topology_extensions,
47 vendor,
48 &model_info,
49 &processor->cache,
50 &processor->tlb.itlb_4KB,
51 &processor->tlb.itlb_2MB,
52 &processor->tlb.itlb_4MB,
53 &processor->tlb.dtlb0_4KB,
54 &processor->tlb.dtlb0_2MB,
55 &processor->tlb.dtlb0_4MB,
56 &processor->tlb.dtlb_4KB,
57 &processor->tlb.dtlb_2MB,
58 &processor->tlb.dtlb_4MB,
59 &processor->tlb.dtlb_1GB,
60 &processor->tlb.stlb2_4KB,
61 &processor->tlb.stlb2_2MB,
62 &processor->tlb.stlb2_1GB,
63 &processor->topology.core_bits_length);
64
65 cpuinfo_x86_detect_topology(max_base_index, max_extended_index, leaf1, &processor->topology);
66
67 cpuinfo_isa = cpuinfo_x86_detect_isa(
68 leaf1, leaf0x80000001, max_base_index, max_extended_index, vendor, uarch);
69 }
70 if (max_extended_index >= UINT32_C(0x80000004)) {
71 struct cpuid_regs brand_string[3];
72 for (uint32_t i = 0; i < 3; i++) {
73 brand_string[i] = cpuid(UINT32_C(0x80000002) + i);
74 }
75 memcpy(processor->brand_string, brand_string, sizeof(processor->brand_string));
76 cpuinfo_log_debug("raw CPUID brand string: \"%48s\"", processor->brand_string);
77 }
78 }
79