mirror of
https://github.com/yuzu-emu/unicorn.git
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345 lines
8.6 KiB
C
345 lines
8.6 KiB
C
/*
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* Dynamic device configuration and creation.
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*
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* Copyright (c) 2009 CodeSourcery
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/* The theory here is that it should be possible to create a machine without
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knowledge of specific devices. Historically board init routines have
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passed a bunch of arguments to each device, requiring the board know
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exactly which device it is dealing with. This file provides an abstract
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API for device configuration and initialization. Devices will generally
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inherit from a particular bus (e.g. PCI or I2C) rather than
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this API directly. */
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#include "hw/qdev.h"
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#include "qapi/error.h"
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#include "qapi/qmp/qerror.h"
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static void bus_add_child(BusState *bus, DeviceState *child)
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{
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char name[32];
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BusChild *kid = g_malloc0(sizeof(*kid));
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kid->index = bus->max_index++;
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kid->child = child;
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object_ref(OBJECT(kid->child));
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QTAILQ_INSERT_HEAD(&bus->children, kid, sibling);
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/* This transfers ownership of kid->child to the property. */
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snprintf(name, sizeof(name), "child[%d]", kid->index);
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object_property_add_link(OBJECT(bus), name,
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object_get_typename(OBJECT(child)),
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(Object **)&kid->child,
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NULL, /* read-only property */
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0, /* return ownership on prop deletion */
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NULL);
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}
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void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
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{
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dev->parent_bus = bus;
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object_ref(OBJECT(bus));
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bus_add_child(bus, dev);
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}
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/* Create a new device. This only initializes the device state structure
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and allows properties to be set. qdev_init should be called to
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initialize the actual device emulation. */
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DeviceState *qdev_create(BusState *bus, const char *name)
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{
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DeviceState *dev;
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dev = qdev_try_create(bus, name);
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if (!dev) {
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abort();
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}
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return dev;
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}
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DeviceState *qdev_try_create(BusState *bus, const char *type)
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{
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#if 0
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DeviceState *dev;
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if (object_class_by_name(NULL, type) == NULL) { // no need to fix. aq
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return NULL;
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}
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dev = DEVICE(object_new(NULL, type)); // no need to fix. aq
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if (!dev) {
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return NULL;
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}
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if (!bus) {
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bus = sysbus_get_default();
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}
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qdev_set_parent_bus(dev, bus);
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object_unref(OBJECT(dev));
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return dev;
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#endif
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return NULL;
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}
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/* Initialize a device. Device properties should be set before calling
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this function. IRQs and MMIO regions should be connected/mapped after
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calling this function.
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On failure, destroy the device and return negative value.
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Return 0 on success. */
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int qdev_init(DeviceState *dev)
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{
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return 0;
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}
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BusState *qdev_get_parent_bus(DeviceState *dev)
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{
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return dev->parent_bus;
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}
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static void qbus_realize(BusState *bus, DeviceState *parent, const char *name)
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{
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}
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static void bus_unparent(struct uc_struct *uc, Object *obj)
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{
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BusState *bus = BUS(uc, obj);
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BusChild *kid;
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while ((kid = QTAILQ_FIRST(&bus->children)) != NULL) {
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DeviceState *dev = kid->child;
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object_unparent(uc, OBJECT(dev));
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}
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if (bus->parent) {
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QLIST_REMOVE(bus, sibling);
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bus->parent->num_child_bus--;
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bus->parent = NULL;
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}
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}
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void qbus_create_inplace(void *bus, size_t size, const char *typename,
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DeviceState *parent, const char *name)
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{
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object_initialize(NULL, bus, size, typename); // unused, so no need to fix. aq
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qbus_realize(bus, parent, name);
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}
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BusState *qbus_create(const char *typename, DeviceState *parent, const char *name)
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{
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BusState *bus;
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bus = BUS(NULL, object_new(NULL, typename)); // no need to fix. aq
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qbus_realize(bus, parent, name);
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return bus;
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}
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static bool device_get_realized(struct uc_struct *uc, Object *obj, Error **errp)
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{
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DeviceState *dev = DEVICE(uc, obj);
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return dev->realized;
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}
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static int device_set_realized(struct uc_struct *uc, Object *obj, bool value, Error **errp)
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{
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DeviceState *dev = DEVICE(uc, obj);
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DeviceClass *dc = DEVICE_GET_CLASS(uc, dev);
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BusState *bus;
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Error *local_err = NULL;
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if (dev->hotplugged && !dc->hotpluggable) {
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error_set(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
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return -1;
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}
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if (value && !dev->realized) {
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#if 0
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if (!obj->parent) {
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static int unattached_count;
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gchar *name = g_strdup_printf("device[%d]", unattached_count++);
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object_property_add_child(container_get(qdev_get_machine(),
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"/unattached"),
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name, obj, &error_abort);
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g_free(name);
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}
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#endif
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if (dc->realize) {
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if (dc->realize(uc, dev, &local_err))
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return -1;
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}
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if (local_err != NULL) {
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goto fail;
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}
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if (local_err != NULL) {
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goto post_realize_fail;
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}
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QLIST_FOREACH(bus, &dev->child_bus, sibling) {
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object_property_set_bool(uc, OBJECT(bus), true, "realized",
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&local_err);
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if (local_err != NULL) {
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goto child_realize_fail;
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}
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}
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if (dev->hotplugged) {
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device_reset(dev);
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}
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dev->pending_deleted_event = false;
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} else if (!value && dev->realized) {
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Error **local_errp = NULL;
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QLIST_FOREACH(bus, &dev->child_bus, sibling) {
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local_errp = local_err ? NULL : &local_err;
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object_property_set_bool(uc, OBJECT(bus), false, "realized",
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local_errp);
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}
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if (dc->unrealize) {
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local_errp = local_err ? NULL : &local_err;
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dc->unrealize(dev, local_errp);
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}
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dev->pending_deleted_event = true;
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}
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if (local_err != NULL) {
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goto fail;
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}
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dev->realized = value;
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return 0;
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child_realize_fail:
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QLIST_FOREACH(bus, &dev->child_bus, sibling) {
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object_property_set_bool(uc, OBJECT(bus), false, "realized",
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NULL);
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}
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post_realize_fail:
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if (dc->unrealize) {
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dc->unrealize(dev, NULL);
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}
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fail:
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error_propagate(errp, local_err);
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return -1;
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}
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static void device_initfn(struct uc_struct *uc, Object *obj, void *opaque)
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{
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DeviceState *dev = DEVICE(uc, obj);
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dev->instance_id_alias = -1;
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dev->realized = false;
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object_property_add_bool(uc, obj, "realized",
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device_get_realized, device_set_realized, NULL);
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}
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static void device_post_init(struct uc_struct *uc, Object *obj)
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{
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}
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/* Unlink device from bus and free the structure. */
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static void device_finalize(struct uc_struct *uc, Object *obj, void *opaque)
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{
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}
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static void device_class_base_init(ObjectClass *class, void *data)
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{
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}
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static void device_class_init(struct uc_struct *uc, ObjectClass *class, void *data)
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{
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}
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void device_reset(DeviceState *dev)
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{
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}
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Object *qdev_get_machine(struct uc_struct *uc)
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{
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return container_get(uc, object_get_root(uc), "/machine");
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}
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static const TypeInfo device_type_info = {
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TYPE_DEVICE,
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TYPE_OBJECT,
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sizeof(DeviceClass),
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sizeof(DeviceState),
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NULL,
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device_initfn,
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device_post_init,
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device_finalize,
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NULL,
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device_class_init,
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device_class_base_init,
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NULL,
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true,
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};
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static void qbus_initfn(struct uc_struct *uc, Object *obj, void *opaque)
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{
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}
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static void bus_class_init(struct uc_struct *uc, ObjectClass *class, void *data)
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{
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class->unparent = bus_unparent;
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}
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static void qbus_finalize(struct uc_struct *uc, Object *obj, void *opaque)
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{
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BusState *bus = BUS(uc, obj);
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g_free((char *)bus->name);
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}
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static const TypeInfo bus_info = {
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TYPE_BUS,
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TYPE_OBJECT,
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sizeof(BusClass),
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sizeof(BusState),
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NULL,
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qbus_initfn,
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NULL,
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qbus_finalize,
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NULL,
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bus_class_init,
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NULL,
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NULL,
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true,
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};
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void qdev_register_types(struct uc_struct *uc)
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{
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type_register_static(uc, &bus_info);
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type_register_static(uc, &device_type_info);
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}
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