28 lines
655 B
C
28 lines
655 B
C
#include <cpuid.h>
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#include <stdint.h>
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#include <debug.h>
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uint32_t cpuid_features_b, cpuid_features_c, cpuid_features_d;
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uint32_t cpuid_featuresx_b, cpuid_featuresx_c, cpuid_featuresx_d;
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uint32_t cpuid_signature;
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uint32_t cpuid_max=0x0, cpuid_maxx=0x80000000;
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void cpuid(uint32_t code, uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d)
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{
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uint32_t scrap;
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if(!a) a = &scrap;
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if(!b) b = &scrap;
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if(!c) c = &scrap;
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if(!d) d = &scrap;
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if((code < CPUID_FUNCTIONX_VENDOR && code > cpuid_max) || code > cpuid_maxx)
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{
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*a = *b = *c = *d = -1;
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return;
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}
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asm volatile("cpuid" : "=a"(*a), "=b"(*b), "=c"(*c), "=d"(*d) : "a"(code));
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}
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