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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 <[email protected]>
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, TYPE_ICC_BUS, DEVICE(s), "icc");
94
95     /* Do not change order of registering regions,
96      * APIC must be first registered region, board maps it by 0 index
97      */
98     memory_region_init(&s->apic_container, obj, "icc-apic-container",
99                        APIC_SPACE_SIZE);
100     sysbus_init_mmio(sb, &s->apic_container);
101     s->icc_bus.apic_address_space = &s->apic_container;
102 }
103
104 static const TypeInfo icc_bridge_info = {
105     .name  = TYPE_ICC_BRIDGE,
106     .parent = TYPE_SYS_BUS_DEVICE,
107     .instance_init  = icc_bridge_init,
108     .instance_size  = sizeof(ICCBridgeState),
109 };
110
111
112 static void icc_bus_register_types(void)
113 {
114     type_register_static(&icc_bus_info);
115     type_register_static(&icc_device_info);
116     type_register_static(&icc_bridge_info);
117 }
118
119 type_init(icc_bus_register_types)
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