Archipelago » qemu

/* 

 * Generic ARM Programmable Interrupt Controller support.

 *

 * Copyright (c) 2006 CodeSourcery.

 * Written by Paul Brook

 *

 * This code is licenced under the LGPL

 */

#include "vl.h"

#include "arm_pic.h"

/* Stub functions for hardware that doesn't exist.  */

void pic_set_irq(int irq, int level)

{

    cpu_abort(cpu_single_env, "pic_set_irq");

}

void pic_info(void)

{

}

void irq_info(void)

{

}

void pic_set_irq_new(void *opaque, int irq, int level)

{

    arm_pic_handler *p = (arm_pic_handler *)opaque;

    /* Call the real handler.  */

    (*p)(opaque, irq, level);

}

/* Model the IRQ/FIQ CPU interrupt lines as a two input interrupt controller.

   Input 0 is IRQ and input 1 is FIQ.  */

typedef struct

{

    arm_pic_handler handler;

    CPUState *cpu_env;

} arm_pic_cpu_state;

static void arm_pic_cpu_handler(void *opaque, int irq, int level)

{

    arm_pic_cpu_state *s = (arm_pic_cpu_state *)opaque;

    switch (irq) {

    case ARM_PIC_CPU_IRQ:

        if (level)

            cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);

        else

            cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);

        break;

    case ARM_PIC_CPU_FIQ:

        if (level)

            cpu_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ);

        else

            cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ);

        break;

    default:

        cpu_abort(s->cpu_env, "arm_pic_cpu_handler: Bad interrput line %d\n",

                  irq);

    }

}

void *arm_pic_init_cpu(CPUState *env)

{

    arm_pic_cpu_state *s;

    s = (arm_pic_cpu_state *)malloc(sizeof(arm_pic_cpu_state));

    s->handler = arm_pic_cpu_handler;

    s->cpu_env = env;

    return s;

}