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     ICCDeviceClass *idc = ICC_DEVICE_GET_CLASS(dev);
  47
  48     /* convert to QOM */
  49     if (idc->realize) {
  50         idc->realize(dev, errp);
  51     }
  52
  53 }
  54
  55 static void icc_device_class_init(ObjectClass *oc, void *data)
  56 {
  57     DeviceClass *dc = DEVICE_CLASS(oc);
  58
  59     dc->realize = icc_device_realize;
  60     dc->bus_type = TYPE_ICC_BUS;
  61 }
  62
  63 static const TypeInfo icc_device_info = {
  64     .name = TYPE_ICC_DEVICE,
  65     .parent = TYPE_DEVICE,
  66     .abstract = true,
  67     .instance_size = sizeof(ICCDevice),
  68     .class_size = sizeof(ICCDeviceClass),
  69     .class_init = icc_device_class_init,
  70 };
  71
  72
  73 /*  icc-bridge implementation */
  74
  75 typedef struct ICCBridgeState {
  76     /*< private >*/
  77     SysBusDevice parent_obj;
  78     /*< public >*/
  79
  80     ICCBus icc_bus;
  81     MemoryRegion apic_container;
  82 } ICCBridgeState;
  83
  84 #define ICC_BRIGDE(obj) OBJECT_CHECK(ICCBridgeState, (obj), TYPE_ICC_BRIDGE)
  85
  86 static void icc_bridge_init(Object *obj)
  87 {
  88     ICCBridgeState *s = ICC_BRIGDE(obj);
  89     SysBusDevice *sb = SYS_BUS_DEVICE(obj);
  90
  91     qbus_create_inplace(&s->icc_bus, sizeof(s->icc_bus), TYPE_ICC_BUS,
  92                         DEVICE(s), "icc");
  93
  94     /* Do not change order of registering regions,
  95      * APIC must be first registered region, board maps it by 0 index
  96      */
  97     memory_region_init(&s->apic_container, obj, "icc-apic-container",
  98                        APIC_SPACE_SIZE);
  99     sysbus_init_mmio(sb, &s->apic_container);
 100     s->icc_bus.apic_address_space = &s->apic_container;
 101 }
 102
 103 static void icc_bridge_class_init(ObjectClass *oc, void *data)
 104 {
 105     DeviceClass *dc = DEVICE_CLASS(oc);
 106
 107     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 108 }
 109
 110 static const TypeInfo icc_bridge_info = {
 111     .name  = TYPE_ICC_BRIDGE,
 112     .parent = TYPE_SYS_BUS_DEVICE,
 113     .instance_init  = icc_bridge_init,
 114     .instance_size  = sizeof(ICCBridgeState),
 115     .class_init = icc_bridge_class_init,
 116 };
 117
 118
 119 static void icc_bus_register_types(void)
 120 {
 121     type_register_static(&icc_bus_info);
 122     type_register_static(&icc_device_info);
 123     type_register_static(&icc_bridge_info);
 124 }
 125
 126 type_init(icc_bus_register_types)