47 lines
816 B
C
47 lines
816 B
C
/**
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* arch.c
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* Инициализация архитектуры
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*
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* Настройка архитектурнозависимых функций
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*
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*/
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#include <arch.h>
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static uint64_t kernel_start_ticks = 0;
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static uint64_t kernel_ticks = 0;
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uint64_t rdtsc( ) {
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unsigned int lo, hi;
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asm volatile("rdtsc" : "=a"(lo), "=d"(hi));
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return ((uint64_t)hi << 32) | lo;
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}
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uint64_t arch_get_tick( ) {
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if (kernel_start_ticks == 0) {
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kernel_start_ticks = rdtsc( );
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return 0;
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}
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kernel_ticks = rdtsc( ) - kernel_start_ticks;
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return kernel_ticks;
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}
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uint64_t arch_get_tick_b( ) {
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uint64_t tick = arch_get_tick( ) + 1;
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return tick / 1000000;
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}
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uint64_t arch_get_tick_l( ) {
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uint64_t tick = arch_get_tick( ) + 1;
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return tick % 1000000;
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}
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void arch_init( ) {
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gdt_init( );
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idt_init( );
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cpu_init( );
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} |