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 const TypeInfo icc_bus_info = {
  28     .name = TYPE_ICC_BUS,
  29     .parent = TYPE_BUS,
  30     .instance_size = sizeof(ICCBus),
  31 };
  32
  33
  34 /* icc-device implementation */
  35
  36 static void icc_device_realize(DeviceState *dev, Error **errp)
  37 {
  38     ICCDeviceClass *idc = ICC_DEVICE_GET_CLASS(dev);
  39
  40     /* convert to QOM */
  41     if (idc->realize) {
  42         idc->realize(dev, errp);
  43     }
  44
  45 }
  46
  47 static void icc_device_class_init(ObjectClass *oc, void *data)
  48 {
  49     DeviceClass *dc = DEVICE_CLASS(oc);
  50
  51     dc->realize = icc_device_realize;
  52     dc->bus_type = TYPE_ICC_BUS;
  53 }
  54
  55 static const TypeInfo icc_device_info = {
  56     .name = TYPE_ICC_DEVICE,
  57     .parent = TYPE_DEVICE,
  58     .abstract = true,
  59     .instance_size = sizeof(ICCDevice),
  60     .class_size = sizeof(ICCDeviceClass),
  61     .class_init = icc_device_class_init,
  62 };
  63
  64
  65 /*  icc-bridge implementation */
  66
  67 typedef struct ICCBridgeState {
  68     /*< private >*/
  69     SysBusDevice parent_obj;
  70     /*< public >*/
  71
  72     ICCBus icc_bus;
  73     MemoryRegion apic_container;
  74 } ICCBridgeState;
  75
  76 #define ICC_BRIDGE(obj) OBJECT_CHECK(ICCBridgeState, (obj), TYPE_ICC_BRIDGE)
  77
  78 static void icc_bridge_init(Object *obj)
  79 {
  80     ICCBridgeState *s = ICC_BRIDGE(obj);
  81     SysBusDevice *sb = SYS_BUS_DEVICE(obj);
  82
  83     qbus_create_inplace(&s->icc_bus, sizeof(s->icc_bus), TYPE_ICC_BUS,
  84                         DEVICE(s), "icc");
  85
  86     /* Do not change order of registering regions,
  87      * APIC must be first registered region, board maps it by 0 index
  88      */
  89     memory_region_init(&s->apic_container, obj, "icc-apic-container",
  90                        APIC_SPACE_SIZE);
  91     sysbus_init_mmio(sb, &s->apic_container);
  92     s->icc_bus.apic_address_space = &s->apic_container;
  93 }
  94
  95 static void icc_bridge_class_init(ObjectClass *oc, void *data)
  96 {
  97     DeviceClass *dc = DEVICE_CLASS(oc);
  98
  99     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 100 }
 101
 102 static const TypeInfo icc_bridge_info = {
 103     .name  = TYPE_ICC_BRIDGE,
 104     .parent = TYPE_SYS_BUS_DEVICE,
 105     .instance_init  = icc_bridge_init,
 106     .instance_size  = sizeof(ICCBridgeState),
 107     .class_init = icc_bridge_class_init,
 108 };
 109
 110
 111 static void icc_bus_register_types(void)
 112 {
 113     type_register_static(&icc_bus_info);
 114     type_register_static(&icc_device_info);
 115     type_register_static(&icc_bridge_info);
 116 }
 117
 118 type_init(icc_bus_register_types)