Archipelago » qemu

 * ARM MPCore internal peripheral emulation.

#define MPCORE_PRIV_BASE  0x10100000

/* ??? The MPCore TRM says the on-chip controller has 224 external IRQ lines

   (+ 32 internal).  However my test chip only exposes/reports 32.

   More importantly Linux falls over if more than 32 are present!  */

#define GIC_NIRQ 64

/* Dummy PIC to route IRQ lines.  The baseboard has 4 independent IRQ

   controllers.  The output of these, plus some of the raw input lines

   are fed into a single SMP-aware interrupt controller on the CPU.  */

typedef struct {

    SysBusDevice busdev;

    qemu_irq cpuic[32];

    qemu_irq rvic[4][64];

    uint32_t num_cpu;

} mpcore_rirq_state;

/* Map baseboard IRQs onto CPU IRQ lines.  */

static const int mpcore_irq_map[32] = {

    -1, -1, -1, -1,  1,  2, -1, -1,

    -1, -1,  6, -1,  4,  5, -1, -1,

    -1, 14, 15,  0,  7,  8, -1, -1,

    -1, -1, -1, -1,  9,  3, -1, -1,

};

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

{

    mpcore_rirq_state *s = (mpcore_rirq_state *)opaque;

    int i;

    for (i = 0; i < 4; i++) {

        qemu_set_irq(s->rvic[i][irq], level);

    }

    if (irq < 32) {

        irq = mpcore_irq_map[irq];

        if (irq >= 0) {

            qemu_set_irq(s->cpuic[irq], level);

        }

    }

}

static int realview_mpcore_init(SysBusDevice *dev)

{

    mpcore_rirq_state *s = FROM_SYSBUS(mpcore_rirq_state, dev);

    DeviceState *gic;

    DeviceState *priv;

    SysBusDevice *bus_priv;

    int n;

    int i;

    priv = qdev_create(NULL, "arm11mpcore_priv");

    qdev_prop_set_uint32(priv, "num-cpu", s->num_cpu);

    qdev_init_nofail(priv);

    bus_priv = sysbus_from_qdev(priv);

    sysbus_mmio_map(bus_priv, 0, MPCORE_PRIV_BASE);

    sysbus_pass_irq(dev, bus_priv);

    for (i = 0; i < 32; i++) {

        s->cpuic[i] = qdev_get_gpio_in(priv, i);

    }

    /* ??? IRQ routing is hardcoded to "normal" mode.  */

    for (n = 0; n < 4; n++) {

        gic = sysbus_create_simple("realview_gic", 0x10040000 + n * 0x10000,

                                   s->cpuic[10 + n]);

        for (i = 0; i < 64; i++) {

            s->rvic[n][i] = qdev_get_gpio_in(gic, i);

        }

    }

    qdev_init_gpio_in(&dev->qdev, mpcore_rirq_set_irq, 64);

    return 0;

}

static SysBusDeviceInfo mpcore_rirq_info = {

    .init = realview_mpcore_init,

    .qdev.name  = "realview_mpcore",

    .qdev.size  = sizeof(mpcore_rirq_state),

    .qdev.props = (Property[]) {

        DEFINE_PROP_UINT32("num-cpu", mpcore_rirq_state, num_cpu, 1),

        DEFINE_PROP_END_OF_LIST(),

    }

};

static SysBusDeviceInfo mpcore_priv_info = {

    .init = mpcore_priv_init,

    .qdev.name  = "arm11mpcore_priv",

    .qdev.size  = sizeof(mpcore_priv_state),

    .qdev.props = (Property[]) {

        DEFINE_PROP_UINT32("num-cpu", mpcore_priv_state, num_cpu, 1),

        DEFINE_PROP_END_OF_LIST(),

    }

};

static void mpcore_register_devices(void)

{

    sysbus_register_withprop(&mpcore_rirq_info);

    sysbus_register_withprop(&mpcore_priv_info);

}

device_init(mpcore_register_devices)