diff options
Diffstat (limited to 'src/kernel/timer/timer.c')
| -rw-r--r-- | src/kernel/timer/timer.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/src/kernel/timer/timer.c b/src/kernel/timer/timer.c index 0e10c07..defb95d 100644 --- a/src/kernel/timer/timer.c +++ b/src/kernel/timer/timer.c @@ -4,35 +4,39 @@ unsigned long timer_ticks = 0; -void timer_phase(int hz) { +void timer_phase(int hz) +{ int divisor = (int) (3579545.0 / 3.0 / (double) hz); - send_b(0x43, 0x36); // 01 10 11 0b // CTR, RW, MODE, BCD - send_b(0x40, divisor & 0xFF); - send_b(0x40, divisor >> 8); + outb(0x43, 0x36); // 01 10 11 0b // CTR, RW, MODE, BCD + outb(0x40, divisor & 0xFF); + outb(0x40, divisor >> 8); } // Executed 1000 times per second -void timer_handler(struct regs *r) { +void timer_handler(struct regs *r) +{ timer_ticks++; } // "Delay" function with CPU sleep -void timer_wait(int ticks) { +void timer_wait(int ticks) +{ unsigned int eticks; eticks = timer_ticks + ticks; while (timer_ticks < eticks) { - asm volatile ("sti//hlt//cli"); + asm ("sti//hlt//cli"); } } -unsigned int get_time() { +unsigned int get_time() +{ return timer_ticks; } // Install timer handler into IRQ0 -void timer_install() { +void timer_install() +{ timer_phase(1000); irq_install_handler(0, timer_handler); - vga_log("Installed timer", 1); }
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