339b82e10c
Completely removes: * The kernel terminal (both VGA and graphical) * The kernel ANSI parser (obviously) * kgets() function * Dozens of other functions that were made useless Adds: * Userspace terminal that should work (relatively) well * Keyboard device driver (implemented with a "pipe" object) * Stabalized interrupt interface * `clear` uses the c library * All panic screens and kprintf() output goes to the serial line ONLY * The kernel boots directly into /bin/terminal (no arguments, unless you want to add them (such as -f))
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* CMOS Driver
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*
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* Part of the ToAruOS Kernel
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* (C) 2011 Kevin Lange
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*/
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#include <system.h>
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/* CMOS values are stored like so:
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* Say it's 8:42 AM, then the values are stored as:
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* 0x08, 0x42... why this was a good idea, I have no
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* clue, but that's how it usually is.
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*
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* This function will convert between this "BCD" format
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* and regular decimal integers. */
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#define from_bcd(val) ((val / 16) * 10 + (val & 0xf))
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void
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cmos_dump(
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uint16_t * values
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) {
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uint16_t index;
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for (index = 0; index < 128; ++index) {
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outportb(0x70, index);
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values[index] = inportb(0x71);
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}
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}
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/**
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* Get the current month and day.
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*
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* @param month Pointer to a short to store the month
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* @param day Pointer to a short to store the day
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*/
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void
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get_date(
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uint16_t * month,
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uint16_t * day
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) {
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uint16_t values[128]; /* CMOS dump */
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cmos_dump(values);
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*month = from_bcd(values[8]);
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*day = from_bcd(values[7]);
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}
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/**
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* Get the current time.
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*
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* @param hours Pointer to a short to store the current hour (/24)
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* @param minutes Pointer to a short to store the current minute
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* @param seconds Pointer to a short to store the current second
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*/
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void
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get_time(
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uint16_t * hours,
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uint16_t * minutes,
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uint16_t * seconds
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) {
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uint16_t values[128]; /* CMOS dump */
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cmos_dump(values);
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*hours = from_bcd(values[4]);
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*minutes = from_bcd(values[2]);
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*seconds = from_bcd(values[0]);
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}
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int
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gettimeofday(struct timeval * t, void *z) {
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uint16_t values[128];
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cmos_dump(values);
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/* Math Time */
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uint32_t time = (from_bcd(values[9]) - 70) * 31556926 +
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from_bcd(values[8]) * 2629743 +
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from_bcd(values[7]) * 87400 +
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from_bcd(values[4]) * 3600 +
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from_bcd(values[2]) * 60 +
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from_bcd(values[0]);
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t->tv_sec = time;
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t->tv_usec = 0;
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return 0;
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}
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uint32_t now() {
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struct timeval t;
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gettimeofday(&t, NULL);
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return t.tv_sec;
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}
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