/** Pre-handling function.
* @param num IRQ number.
* @return True if IRQ should be handled. */
static bool pic_pre_handle(unsigned num) {
assert(num < 16);
/* Check for spurious IRQs. */
if(num == 7) {
/* Read the In-Service Register, check the high bit. */
out8(0x23, 3);
if((in8(0x20) & 0x80) == 0) {
kprintf(LOG_DEBUG, "pic: spurious IRQ7 (master), ignoring...\n");
return false;
}
} else if(num == 15) {
/* Read the In-Service Register, check the high bit. */
out8(0xA3, 3);
if((in8(0xA0) & 0x80) == 0) {
kprintf(LOG_DEBUG, "pic: spurious IRQ15 (slave), ignoring...\n");
return false;
}
}
/* Edge-triggered interrupts must be acked before we handle. */
if(!(pic_level_triggered & (1 << num)))
pic_eoi(num);
return true;
}
void timer_intr(void)
{
timer_systime_counter.low++;
if(timer_systime_counter.low >= TIMER_SYSTIME_LOW_RESO) {
timer_systime_counter.high++;
timer_systime_counter.low = 0;
}
pic_eoi(PIC_IRQ_TIMER); /* notify "Reception completion" to PIC */
/*
{
static char i=0;
int pos;
char s[4];
byte2hex(i,s);
i++;
pos = console_getpos();
console_locatepos(77,0);
console_puts(s);
console_putpos(pos);
}
*/
alarm_check();
task_tick();
task_dispatch();
return;
}
void cIRQ1(irq_stack_t regs)
{
uint8_t c = ol_ps2_get_keyboard_scancode();
kb_handle(c);
pic_eoi(1);
return;
}
void cIRQ8(irq_stack_t regs)
{
printf("test\n");
outb(CMOS_SELECT, CMOS_RTC_IRQ);
inb(CMOS_DATA);
pic_eoi(8);
return;
}
void _inthandler26()
{
if(fdc_reset)
wake_up_event(WAIT_IRQ6);
else
fdc_reset = true;
pic_eoi(6);
}
INLINE int pic_is_spurious(unsigned irq) {
uint16_t isr = pic_get_isr();
if (irq == 7) return isr != 128;
else if (irq == 15) {
if (isr != 0x8004) {
pic_eoi(2);
return 0;
} else return 1;
} else return 0;
}
void pic_isr(struct thread_state* state, unsigned ring, unsigned irq) {
(void)state;
(void)ring;
unsigned pirq = irq - 32;
if (!pic_is_spurious(pirq)) {
if (pirq == 8) rtc_update(); // try to keep RTC latency as low as possible.
pic_eoi(pirq);
isr_send_signal(irq);
}
}
void pit_handler(struct interrupt_info* info) {
pic_eoi(false);
static int counter = 0;
static int number = 0;
++counter;
if (counter >= PIT_TICKS) {
++number;
counter = 0;
schedule(THREAD_NEW_STATE_ALIVE);
}
}
void cIRQ0(irq_stack_t regs)
{
if (isSleeping)
{
if (!(sleepTime == 0)) sleepTime--;
}
pit_timer += 1;
pic_eoi(0);
return;
}
void cIRQ4(irq_stack_t regs)
{
pic_eoi(4);
return;
}
void cIRQ11(irq_stack_t regs)
{
pic_eoi(11);
return;
}
/** Post-handling function.
* @param num IRQ number. */
static void pic_post_handle(unsigned num) {
/* Level-triggered interrupts must be acked once all handlers have been
* run. */
if(pic_level_triggered & (1 << num))
pic_eoi(num);
}
void cIRQ14(irq_stack_t regs)
{
putc('a');
pic_eoi(14);
return;
}
void cIRQ15(irq_stack_t regs)
{
putc('b');
pic_eoi(15);
return;
}
void cIRQ7(irq_stack_t regs)
{
pic_eoi(7);
return;
}
void cIRQ6(irq_stack_t regs)
{
pic_eoi(6);
return;
}
void cIRQ10(irq_stack_t regs)
{
pic_eoi(10);
return;
}
void cIRQ3(irq_stack_t regs)
{
pic_eoi(3);
return;
}
void cIRQ2(irq_stack_t regs)
{
pic_eoi(2);
return;
}
void cIRQ5(irq_stack_t regs)
{
pic_eoi(5);
return;
}
void cIRQ9(irq_stack_t regs)
{
putc('a');
pic_eoi(9);
return;
}