rpi4-osdev/part13-interrupts/kernel/irq.c

46 lines
902 B
C
Raw Normal View History

#include "kernel.h"
const char entry_error_messages[16][32] = {
"SYNC_INVALID_EL1t",
"IRQ_INVALID_EL1t",
"FIQ_INVALID_EL1t",
"ERROR_INVALID_EL1T",
"SYNC_INVALID_EL1h",
"IRQ_INVALID_EL1h",
"FIQ_INVALID_EL1h",
"ERROR_INVALID_EL1h",
"SYNC_INVALID_EL0_64",
"IRQ_INVALID_EL0_64",
"FIQ_INVALID_EL0_64",
"ERROR_INVALID_EL0_64",
"SYNC_INVALID_EL0_32",
"IRQ_INVALID_EL0_32",
"FIQ_INVALID_EL0_32",
"ERROR_INVALID_EL0_32"
};
void enable_interrupt_controller() {
REGS_IRQ->irq0_enable_0 = AUX_IRQ | SYS_TIMER_IRQ_1 | SYS_TIMER_IRQ_3;
}
void handle_irq() {
unsigned int irq = REGS_IRQ->irq0_pending_0;
while(irq) {
if (irq & SYS_TIMER_IRQ_1) {
irq &= ~SYS_TIMER_IRQ_1;
handle_timer_1();
}
if (irq & SYS_TIMER_IRQ_3) {
irq &= ~SYS_TIMER_IRQ_3;
handle_timer_3();
}
}
}