stkarm/src/vectab.cpp

#include <dbg.h>
#include <interrupt.h>
#include <stdint.h>

extern "C" uint32_t c_irq_handler(uint32_t iar) {
    uint8_t cpuID = (iar >> 10) & 0x7;
    uint16_t interruptID = iar & 0x3ff;

    printk("Serving IRQ #"); printkl(itoa(interruptID));

    void (*handler)(const uint8_t, const uint16_t);

    if (cpuID == 0) {
        /* for
         *  SPI - Shared Peripheral Interrupt
         *  PPI - Private Peripheral Interrupt
        */
        switch (interruptID) {  /* Choose proper interrupt handler */
            case 54: case 55: case 56: case 57: case 99: case 100:
                handler = interrupt::handler[interruptID];
                break;
        }

        /* Call interrupt handler */
        handler(cpuID, interruptID);
    }
    else {
        /* for
         * SGI - Software Generated Interrupts
        */

        /* to be done -- multiprocessor systems */
    }

    return iar;
}