Archipelago » qemu

/*

 * Cortex-A15MPCore internal peripheral emulation.

 *

 * Copyright (c) 2012 Linaro Limited.

 * Written by Peter Maydell.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, see <http://www.gnu.org/licenses/>.

 */

#include "hw/sysbus.h"

#include "sysemu/kvm.h"

/* A15MP private memory region.  */

typedef struct A15MPPrivState {

    SysBusDevice busdev;

    uint32_t num_cpu;

    uint32_t num_irq;

    MemoryRegion container;

    DeviceState *gic;

} A15MPPrivState;

static void a15mp_priv_set_irq(void *opaque, int irq, int level)

{

    A15MPPrivState *s = (A15MPPrivState *)opaque;

    qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);

}

static int a15mp_priv_init(SysBusDevice *dev)

{

    A15MPPrivState *s = FROM_SYSBUS(A15MPPrivState, dev);

    SysBusDevice *busdev;

    const char *gictype = "arm_gic";

    if (kvm_irqchip_in_kernel()) {

        gictype = "kvm-arm-gic";

    }

    s->gic = qdev_create(NULL, gictype);

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

    qdev_prop_set_uint32(s->gic, "num-irq", s->num_irq);

    qdev_prop_set_uint32(s->gic, "revision", 2);

    qdev_init_nofail(s->gic);

    busdev = SYS_BUS_DEVICE(s->gic);

    /* Pass through outbound IRQ lines from the GIC */

    sysbus_pass_irq(dev, busdev);

    /* Pass through inbound GPIO lines to the GIC */

    qdev_init_gpio_in(&s->busdev.qdev, a15mp_priv_set_irq, s->num_irq - 32);

    /* Memory map (addresses are offsets from PERIPHBASE):

     *  0x0000-0x0fff -- reserved

     *  0x1000-0x1fff -- GIC Distributor

     *  0x2000-0x2fff -- GIC CPU interface

     *  0x4000-0x4fff -- GIC virtual interface control (not modelled)

     *  0x5000-0x5fff -- GIC virtual interface control (not modelled)

     *  0x6000-0x7fff -- GIC virtual CPU interface (not modelled)

     */

    memory_region_init(&s->container, "a15mp-priv-container", 0x8000);

    memory_region_add_subregion(&s->container, 0x1000,

                                sysbus_mmio_get_region(busdev, 0));

    memory_region_add_subregion(&s->container, 0x2000,

                                sysbus_mmio_get_region(busdev, 1));

    sysbus_init_mmio(dev, &s->container);

    return 0;

}

static Property a15mp_priv_properties[] = {

    DEFINE_PROP_UINT32("num-cpu", A15MPPrivState, num_cpu, 1),

    /* The Cortex-A15MP may have anything from 0 to 224 external interrupt

     * IRQ lines (with another 32 internal). We default to 64+32, which

     * is the number provided by the Cortex-A15MP test chip in the

     * Versatile Express A15 development board.

     * Other boards may differ and should set this property appropriately.

     */

    DEFINE_PROP_UINT32("num-irq", A15MPPrivState, num_irq, 96),

    DEFINE_PROP_END_OF_LIST(),

};

static void a15mp_priv_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = a15mp_priv_init;

    dc->props = a15mp_priv_properties;

    /* We currently have no savable state */

}

static const TypeInfo a15mp_priv_info = {

    .name  = "a15mpcore_priv",

    .parent = TYPE_SYS_BUS_DEVICE,

    .instance_size  = sizeof(A15MPPrivState),

    .class_init = a15mp_priv_class_init,

};

static void a15mp_register_types(void)

{

    type_register_static(&a15mp_priv_info);

}

type_init(a15mp_register_types)