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/* This file is part of test microkernel for OpenRISC 1000. */

/* (C) 2001 Simon Srot, srot@opencores.org */

#include "support.h"

#include "spr_defs.h"

#include "int.h"

/* Interrupt handlers table */

struct ihnd int_handlers[MAX_INT_HANDLERS];

/* Initialize routine */

int int_init(void)

{

        int     i;

        for(i = 0; i < MAX_INT_HANDLERS; i++) {

                int_handlers[i].handler = 0;

                int_handlers[i].arg = 0;

        }

        return 0;

}

/* Add interrupt handler */

int int_add(unsigned long vect, void (* handler)(), void *arg/*, int hilo*/)

{

        if(vect >= MAX_INT_HANDLERS)

                return -1;

        int_handlers[vect].handler = handler;

        int_handlers[vect].arg = arg;

        mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (0x00000001L << vect));

        /*if(hilo == INT_HIGH_PRI)*/

        if(1)

                mtspr(SPR_PICPR, mfspr(SPR_PICPR) | (0x00000001L << vect));

        else

                mtspr(SPR_PICPR, mfspr(SPR_PICPR) & ~(0x00000001L << vect));

        return 0;

}

/* Disable interrupt */

int int_disable(unsigned long vect)

{

        if(vect >= MAX_INT_HANDLERS)

                return -1;

        mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(0x00000001L << vect));

        return 0;

}

/* Enable interrupt */

int int_enable(unsigned long vect)

{

        if(vect >= MAX_INT_HANDLERS)

                return -1;

        mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (0x00000001L << vect));

        return 0;

}

/* Main interrupt handler */

void int_main(void)

{

        unsigned long   picsr = mfspr(SPR_PICSR);

        unsigned long   i = 0;

        mtspr(SPR_PICSR, 0);

        while(i < 32) {

                if((picsr & (0x01L << i)) && (int_handlers[i].handler != 0)) {

                        (*int_handlers[i].handler)(int_handlers[i].arg);

                        mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(0x00000001L << i));

                }

                i++;

        }

}