64 lines
1.1 KiB
C++
64 lines
1.1 KiB
C++
#include <kernel/CPUID.h>
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namespace CPUID
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{
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void get_cpuid(uint32_t code, uint32_t* out)
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{
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asm volatile("cpuid" : "=a"(out[0]), "=b"(out[1]), "=c"(out[2]), "=d"(out[3]) : "a"(code));
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}
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void get_cpuid_string(uint32_t code, uint32_t* out)
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{
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asm volatile ("cpuid": "=a"(out[0]), "=b"(out[0]), "=d"(out[1]), "=c"(out[2]) : "a"(code));
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}
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bool IsAvailable()
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{
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uint32_t res;
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asm volatile(
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"pushfl;"
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"pushfl;"
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"popl %0;"
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"xorl %1, %0;"
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"pushl %0;"
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"popfl;"
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"pushfl;"
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"popl %0;"
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"popfl;"
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: "=r"(res)
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: "i" (0x00200000));
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return res != 0;
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}
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const char* GetVendor()
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{
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static char vendor[13] {};
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get_cpuid_string(0x00, (uint32_t*)vendor);
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vendor[12] = '\0';
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return vendor;
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}
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void GetFeatures(uint32_t& ecx, uint32_t& edx)
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{
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uint32_t buffer[4] {};
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get_cpuid(0x01, buffer);
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ecx = buffer[2];
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edx = buffer[3];
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}
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bool Is64Bit()
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{
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if (!IsAvailable())
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return false;
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uint32_t buffer[4] {};
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get_cpuid(0x80000000, buffer);
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if (buffer[0] < 0x80000001)
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return false;
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get_cpuid(0x80000001, buffer);
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return buffer[3] & (1 << 29);
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}
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}
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