67 lines
1.2 KiB
C
67 lines
1.2 KiB
C
#include <stdint.h>
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#include <string.h>
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#include <cpuid.h>
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#include <stdlib.h>
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#include <kernel/boot.h>
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extern uint8_t __bss_start;
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extern uint8_t __bss_end;
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void clear_bss(void)
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{
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/*memset(&__bss_start, 0, &__bss_end - &__bss_start);*/
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for (int i = 0; i < ((&__bss_end) - (&__bss_start)); i++)
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{
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(&(__bss_start))[i] = 0x0;
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}
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}
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char* get_cpu_vendor_string(void)
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{
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unsigned int eax, ebx, ecx, edx;
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char vendor[13];
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if (!__get_cpuid(0, &eax, &ebx, &ecx, &edx))
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{
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return strdup("Unknown");
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}
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memcpy(&vendor[0], &ebx, 4);
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memcpy(&vendor[4], &edx, 4);
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memcpy(&vendor[8], &ecx, 4);
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vendor[12] = '\0';
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return strdup(vendor);
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}
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char* get_cpu_brand_string(void)
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{
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unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
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int k = __get_cpuid_max(0x80000000, NULL);
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if (k >= (int) 0x80000005)
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{
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return strdup("Unknown");
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}
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char brand[49];
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unsigned int* brand_ptr = (unsigned int*) brand;
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for (unsigned int i = 0; i < 3; ++i)
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{
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__get_cpuid(0x80000002 + i, &eax, &ebx, &ecx, &edx);
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brand_ptr[i * 4 + 0] = eax;
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brand_ptr[i * 4 + 1] = ebx;
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brand_ptr[i * 4 + 2] = ecx;
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brand_ptr[i * 4 + 3] = edx;
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}
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brand[48] = '\0';
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return strdup(brand);
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}
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