hw/core/sysbus.c

/*
 *  System (CPU) Bus device support code
 *
 *  Copyright (c) 2009 CodeSourcery
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
 */

#include "exec/cpu-common.h"
#include "hw/sysbus.h"
#include "sysemu/sysemu.h"
#include "monitor/monitor.h"

void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
{
    assert(n >= 0 && n < dev->num_irq);
    dev->irqs[n] = 0;
    if (dev->irqp[n]) {
        *dev->irqp[n] = irq;
    }
}

void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr)
{
    assert(n >= 0 && n < dev->num_mmio);

    if (dev->mmio[n].addr == addr) {
        /* ??? region already mapped here.  */
        return;
    }
    if (dev->mmio[n].addr != (hwaddr)-1) {
        /* Unregister previous mapping.  */
        cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size,
                                     IO_MEM_UNASSIGNED);
    }
    dev->mmio[n].addr = addr;
    if (dev->mmio[n].cb) {
        dev->mmio[n].cb(dev, addr);
    } else {
        cpu_register_physical_memory(addr, dev->mmio[n].size,
                                     dev->mmio[n].iofunc);
    }
}


/* Request an IRQ source.  The actual IRQ object may be populated later.  */
void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
{
    int n;

    assert(dev->num_irq < QDEV_MAX_IRQ);
    n = dev->num_irq++;
    dev->irqp[n] = p;
}

void sysbus_init_mmio(SysBusDevice *dev, hwaddr size, int iofunc)
{
    int n;

    assert(dev->num_mmio < QDEV_MAX_MMIO);
    n = dev->num_mmio++;
    dev->mmio[n].addr = -1;
    dev->mmio[n].size = size;
    dev->mmio[n].iofunc = iofunc;
}

static void sysbus_device_init(DeviceState *dev, DeviceInfo *base)
{
    SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);

    info->init(sysbus_from_qdev(dev));
}

void sysbus_register_withprop(SysBusDeviceInfo *info)
{
    info->qdev.init = sysbus_device_init;
    info->qdev.bus_type = BUS_TYPE_SYSTEM;

    assert(info->qdev.size >= sizeof(SysBusDevice));
    qdev_register(&info->qdev);
}

void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
{
    SysBusDeviceInfo *info;

    info = g_malloc0(sizeof(*info));
    info->qdev.name = g_strdup(name);
    info->qdev.size = size;
    info->init = init;
    sysbus_register_withprop(info);
}