72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
#include "../common/global.hpp"
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#include <cstdint>
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#include <cstdlib>
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#include <cstring>
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#include <cstdio>
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#define CPU_VENDOR_MAX_LENGTH 13
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#define CPU_NAME_MAX_LENGTH 49
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#define CPU_VENDOR_INTEL_STRING "GenuineIntel"
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void cpuid(uint32_t level, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) {
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__asm volatile("cpuid"
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: "=a" (*eax),
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"=b" (*ebx),
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"=c" (*ecx),
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"=d" (*edx)
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: "0" (level), "2" (*ecx));
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}
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char* get_cpu_vendor() {
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uint32_t vendor[3];
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uint32_t dummy;
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char * name = (char *) emalloc(sizeof(char) * CPU_VENDOR_MAX_LENGTH);
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memset(name, 0, CPU_VENDOR_MAX_LENGTH);
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cpuid(0x00000000, &dummy, vendor+0x0, vendor+0x2, vendor+0x1);
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snprintf(name, CPU_VENDOR_MAX_LENGTH, "%s", (char *) vendor);
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return name;
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}
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char* get_str_cpu_name_internal() {
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uint32_t brand[12];
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char * name = (char *) emalloc(sizeof(char) * CPU_NAME_MAX_LENGTH);
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memset(name, 0, CPU_NAME_MAX_LENGTH);
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cpuid(0x80000002, brand+0x0, brand+0x1, brand+0x2, brand+0x3);
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cpuid(0x80000003, brand+0x4, brand+0x5, brand+0x6, brand+0x7);
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cpuid(0x80000004, brand+0x8, brand+0x9, brand+0xa, brand+0xb);
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snprintf(name, CPU_NAME_MAX_LENGTH, "%s", (char *) brand);
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return name;
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}
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bool is_corei5() {
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uint32_t eax = 0;
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uint32_t ebx = 0;
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uint32_t ecx = 0;
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uint32_t edx = 0;
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// Get CPU vendor
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char* cpu_vendor = get_cpu_vendor();
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if(strcmp(CPU_VENDOR_INTEL_STRING, cpu_vendor) != 0) {
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printBug("is_corei5: invalid CPU vendor: %s", cpu_vendor);
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return false;
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}
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cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
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if (eax < 0x80000004){
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printBug("is_corei5: unexpected max extended level: 0x%.8X", eax);
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return false;
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}
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// Get CPU name
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char* cpu_name = get_str_cpu_name_internal();
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return strstr(cpu_name, "i5") != NULL;
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}
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