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#include <stdint.h>
#include <string.h>
#include <cpuinfo.h>
#include <x86/cpuid.h>
#include <x86/api.h>
#include <cpuinfo/utils.h>
#include <cpuinfo/log.h>
#include <cpuinfo/common.h>
struct cpuinfo_x86_isa cpuinfo_isa = { 0 };
CPUINFO_INTERNAL uint32_t cpuinfo_x86_clflush_size = 0;
void cpuinfo_x86_init_processor(struct cpuinfo_x86_processor* processor) {
const struct cpuid_regs leaf0 = cpuid(0);
const uint32_t max_base_index = leaf0.eax;
const enum cpuinfo_vendor vendor = processor->vendor =
cpuinfo_x86_decode_vendor(leaf0.ebx, leaf0.ecx, leaf0.edx);
const struct cpuid_regs leaf0x80000000 = cpuid(UINT32_C(0x80000000));
const uint32_t max_extended_index =
leaf0x80000000.eax >= UINT32_C(0x80000000) ? leaf0x80000000.eax : 0;
const struct cpuid_regs leaf0x80000001 = max_extended_index >= UINT32_C(0x80000001) ?
cpuid(UINT32_C(0x80000001)) : (struct cpuid_regs) { 0, 0, 0, 0 };
if (max_base_index >= 1) {
const struct cpuid_regs leaf1 = cpuid(1);
processor->cpuid = leaf1.eax;
const struct cpuinfo_x86_model_info model_info = cpuinfo_x86_decode_model_info(leaf1.eax);
const enum cpuinfo_uarch uarch = processor->uarch =
cpuinfo_x86_decode_uarch(vendor, &model_info);
cpuinfo_x86_clflush_size = ((leaf1.ebx >> 8) & UINT32_C(0x000000FF)) * 8;
/*
* Topology extensions support:
* - AMD: ecx[bit 22] in extended info (reserved bit on Intel CPUs).
*/
const bool amd_topology_extensions = !!(leaf0x80000001.ecx & UINT32_C(0x00400000));
cpuinfo_x86_detect_cache(
max_base_index, max_extended_index, amd_topology_extensions, vendor, &model_info,
&processor->cache,
&processor->tlb.itlb_4KB,
&processor->tlb.itlb_2MB,
&processor->tlb.itlb_4MB,
&processor->tlb.dtlb0_4KB,
&processor->tlb.dtlb0_2MB,
&processor->tlb.dtlb0_4MB,
&processor->tlb.dtlb_4KB,
&processor->tlb.dtlb_2MB,
&processor->tlb.dtlb_4MB,
&processor->tlb.dtlb_1GB,
&processor->tlb.stlb2_4KB,
&processor->tlb.stlb2_2MB,
&processor->tlb.stlb2_1GB,
&processor->topology.core_bits_length);
cpuinfo_x86_detect_topology(max_base_index, max_extended_index, leaf1, &processor->topology);
cpuinfo_isa = cpuinfo_x86_detect_isa(leaf1, leaf0x80000001,
max_base_index, max_extended_index, vendor, uarch);
}
if (max_extended_index >= UINT32_C(0x80000004)) {
struct cpuid_regs brand_string[3];
for (uint32_t i = 0; i < 3; i++) {
brand_string[i] = cpuid(UINT32_C(0x80000002) + i);
}
memcpy(processor->brand_string, brand_string, sizeof(processor->brand_string));
cpuinfo_log_debug("raw CPUID brand string: \"%48s\"", processor->brand_string);
}
}
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