hw/cpu/icc_bus.c

   1 /* icc_bus.c
   2  * emulate x86 ICC (Interrupt Controller Communications) bus
   3  *
   4  * Copyright (c) 2013 Red Hat, Inc
   5  *
   6  * Authors:
   7  *     Igor Mammedov <imammedo@redhat.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  21  */
  22 #include "hw/cpu/icc_bus.h"
  23 #include "hw/sysbus.h"
  24
  25 /* icc-bridge implementation */
  26
  27 static void icc_bus_init(Object *obj)
  28 {
  29     BusState *b = BUS(obj);
  30
  31     b->allow_hotplug = true;
  32 }
  33
  34 static const TypeInfo icc_bus_info = {
  35     .name = TYPE_ICC_BUS,
  36     .parent = TYPE_BUS,
  37     .instance_size = sizeof(ICCBus),
  38     .instance_init = icc_bus_init,
  39 };
  40
  41
  42 /* icc-device implementation */
  43
  44 static void icc_device_realize(DeviceState *dev, Error **errp)
  45 {
  46     ICCDevice *id = ICC_DEVICE(dev);
  47     ICCDeviceClass *idc = ICC_DEVICE_GET_CLASS(id);
  48
  49     if (idc->init) {
  50         if (idc->init(id) < 0) {
  51             error_setg(errp, "%s initialization failed.",
  52                        object_get_typename(OBJECT(dev)));
  53         }
  54     }
  55 }
  56
  57 static void icc_device_class_init(ObjectClass *oc, void *data)
  58 {
  59     DeviceClass *dc = DEVICE_CLASS(oc);
  60
  61     dc->realize = icc_device_realize;
  62     dc->bus_type = TYPE_ICC_BUS;
  63 }
  64
  65 static const TypeInfo icc_device_info = {
  66     .name = TYPE_ICC_DEVICE,
  67     .parent = TYPE_DEVICE,
  68     .abstract = true,
  69     .instance_size = sizeof(ICCDevice),
  70     .class_size = sizeof(ICCDeviceClass),
  71     .class_init = icc_device_class_init,
  72 };
  73
  74
  75 /*  icc-bridge implementation */
  76
  77 typedef struct ICCBridgeState {
  78     /*< private >*/
  79     SysBusDevice parent_obj;
  80     /*< public >*/
  81
  82     ICCBus icc_bus;
  83     MemoryRegion apic_container;
  84 } ICCBridgeState;
  85
  86 #define ICC_BRIGDE(obj) OBJECT_CHECK(ICCBridgeState, (obj), TYPE_ICC_BRIDGE)
  87
  88 static void icc_bridge_init(Object *obj)
  89 {
  90     ICCBridgeState *s = ICC_BRIGDE(obj);
  91     SysBusDevice *sb = SYS_BUS_DEVICE(obj);
  92
  93     qbus_create_inplace(&s->icc_bus, sizeof(s->icc_bus), TYPE_ICC_BUS,
  94                         DEVICE(s), "icc");
  95
  96     /* Do not change order of registering regions,
  97      * APIC must be first registered region, board maps it by 0 index
  98      */
  99     memory_region_init(&s->apic_container, obj, "icc-apic-container",
 100                        APIC_SPACE_SIZE);
 101     sysbus_init_mmio(sb, &s->apic_container);
 102     s->icc_bus.apic_address_space = &s->apic_container;
 103 }
 104
 105 static void icc_bridge_class_init(ObjectClass *oc, void *data)
 106 {
 107     DeviceClass *dc = DEVICE_CLASS(oc);
 108
 109     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 110 }
 111
 112 static const TypeInfo icc_bridge_info = {
 113     .name  = TYPE_ICC_BRIDGE,
 114     .parent = TYPE_SYS_BUS_DEVICE,
 115     .instance_init  = icc_bridge_init,
 116     .instance_size  = sizeof(ICCBridgeState),
 117     .class_init = icc_bridge_class_init,
 118 };
 119
 120
 121 static void icc_bus_register_types(void)
 122 {
 123     type_register_static(&icc_bus_info);
 124     type_register_static(&icc_device_info);
 125     type_register_static(&icc_bridge_info);
 126 }
 127
 128 type_init(icc_bus_register_types)