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26 lines
844 B
C
26 lines
844 B
C
#ifndef CPUID_H
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#define CPUID_H
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#include "misc.h"
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static inline void do_cpuid(dword_t *eax, dword_t *ebx, dword_t *ecx, dword_t *edx) {
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dword_t leaf = *eax;
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switch (leaf) {
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case 0:
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*eax = 0x01; // we support barely anything
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*ebx = 0x756e6547; // Genu
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*edx = 0x49656e69; // ineI
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*ecx = 0x6c65746e; // ntel
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break;
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default: // if leaf is too high, use highest supported leaf
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case 1:
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*eax = 0x0; // say nothing about cpu model number
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*ebx = 0x0; // processor number 0, flushes 0 bytes on clflush
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*ecx = 0b00000000000000000000000000000000; // we support none of the features in ecx
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*edx = 0b00000000000000000000000000000000; // we also support none of the features in edx
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break;
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}
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}
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#endif
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