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Matheus
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#include <kernel/timekeeper.h>
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#include <limine.h>
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#include <logging.h>
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static volatile struct limine_boot_time_request timereq = {
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.id = LIMINE_BOOT_TIME_REQUEST,
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.revision = 0
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};
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static time_t bootunix;
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static time_t ticksperus;
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static time_t (*clockticks)();
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static time_t initclockticks;
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timespec_t timekeeper_timefromboot() {
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timespec_t ts;
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time_t ticks = clockticks() - initclockticks;
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time_t uspassed = ticks / ticksperus;
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ts.s = uspassed / 1000000;
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ts.ns = (uspassed * 1000) % 1000000000;
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return ts;
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}
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timespec_t timekeeper_time() {
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timespec_t fromboot = timekeeper_timefromboot();
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timespec_t unix;
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unix.s = bootunix;
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unix.ns = 0;
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return timespec_add(unix, fromboot);
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}
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// tick is a function that returns the amount of ticks since the timer's initialisation
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void timekeeper_init(time_t (*tick)(), time_t _ticksperus) {
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__assert(timereq.response);
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bootunix = timereq.response->boot_time;
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printf("timekeeper: unix time at boot: %lu\n", bootunix);
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initclockticks = tick();
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ticksperus = _ticksperus;
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clockticks = tick;
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printf("timekeeper: %lu clock ticks at init (%lu ticks per us)\n", initclockticks, ticksperus);
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}
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