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isr.c
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isr.c
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#include "isr.h"
#include "monitor.h"
isr_t interrupt_handlers[256];
void register_interrupt_handler(u8int n, isr_t handler)
{
interrupt_handlers[n] = handler;
}
void isr_handler(registers_t regs)
{
if (interrupt_handlers[regs.int_no] != 0) {
isr_t handler = interrupt_handlers[regs.int_no];
handler(regs);
} else {
monitor_write("received CPU interrupt: ");
monitor_write_dec(regs.int_no);
monitor_put('\n');
}
}
void irq_handler(registers_t regs)
{
if (regs.int_no > 40) {
// slave reset
outb(0xA0, 0x20);
}
// master reset
outb(0x20, 0x20);
if (interrupt_handlers[regs.int_no] != 0) {
isr_t handler = interrupt_handlers[regs.int_no];
handler(regs);
} else {
monitor_write("received IRQ interrupt: ");
monitor_write_dec(regs.int_no);
monitor_put('\n');
}
}