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/*
* ap bridge
*
* Copyright 2018 IBM Corp.
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/sysbus.h"
#include "qemu/bitops.h"
#include "hw/s390x/ap-bridge.h"
#include "cpu.h"
static char *ap_bus_get_dev_path(DeviceState *dev)
{
/* at most one */
return g_strdup_printf("/1");
}
static void ap_bus_class_init(ObjectClass *oc, void *data)
{
BusClass *k = BUS_CLASS(oc);
k->get_dev_path = ap_bus_get_dev_path;
/* More than one ap device does not make sense */
k->max_dev = 1;
}
static const TypeInfo ap_bus_info = {
.name = TYPE_AP_BUS,
.parent = TYPE_BUS,
.instance_size = 0,
.class_init = ap_bus_class_init,
};
void s390_init_ap(void)
{
DeviceState *dev;
BusState *bus;
/* If no AP instructions then no need for AP bridge */
if (!s390_has_feat(S390_FEAT_AP)) {
return;
}
/* Create bridge device */
dev = qdev_create(NULL, TYPE_AP_BRIDGE);
object_property_add_child(qdev_get_machine(), TYPE_AP_BRIDGE,
OBJECT(dev), NULL);
qdev_init_nofail(dev);
/* Create bus on bridge device */
bus = qbus_create(TYPE_AP_BUS, dev, TYPE_AP_BUS);
/* Enable hotplugging */
qbus_set_hotplug_handler(bus, OBJECT(dev), &error_abort);
}
static void ap_bridge_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
hc->unplug = qdev_simple_device_unplug_cb;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
}
static const TypeInfo ap_bridge_info = {
.name = TYPE_AP_BRIDGE,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = 0,
.class_init = ap_bridge_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_HOTPLUG_HANDLER },
{ }
}
};
static void ap_register(void)
{
type_register_static(&ap_bridge_info);
type_register_static(&ap_bus_info);
}
type_init(ap_register)
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