Add access control support to qemu bridge helper
[qemu.git] / hw / isa-bus.c
1 /*
2 * isa bus support for qdev.
3 *
4 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include "hw.h"
20 #include "monitor.h"
21 #include "sysbus.h"
22 #include "isa.h"
23 #include "exec-memory.h"
24
25 static ISABus *isabus;
26 target_phys_addr_t isa_mem_base = 0;
27
28 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
29 static char *isabus_get_fw_dev_path(DeviceState *dev);
30
31 static struct BusInfo isa_bus_info = {
32 .name = "ISA",
33 .size = sizeof(ISABus),
34 .print_dev = isabus_dev_print,
35 .get_fw_dev_path = isabus_get_fw_dev_path,
36 };
37
38 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io)
39 {
40 if (isabus) {
41 fprintf(stderr, "Can't create a second ISA bus\n");
42 return NULL;
43 }
44 if (NULL == dev) {
45 dev = qdev_create(NULL, "isabus-bridge");
46 qdev_init_nofail(dev);
47 }
48
49 isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
50 isabus->address_space_io = address_space_io;
51 return isabus;
52 }
53
54 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
55 {
56 if (!bus) {
57 hw_error("Can't set isa irqs with no isa bus present.");
58 }
59 bus->irqs = irqs;
60 }
61
62 /*
63 * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
64 *
65 * This function is only for special cases such as the 'ferr', and
66 * temporary use for normal devices until they are converted to qdev.
67 */
68 qemu_irq isa_get_irq(ISADevice *dev, int isairq)
69 {
70 assert(!dev || DO_UPCAST(ISABus, qbus, dev->qdev.parent_bus) == isabus);
71 if (isairq < 0 || isairq > 15) {
72 hw_error("isa irq %d invalid", isairq);
73 }
74 return isabus->irqs[isairq];
75 }
76
77 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
78 {
79 assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
80 dev->isairq[dev->nirqs] = isairq;
81 *p = isa_get_irq(dev, isairq);
82 dev->nirqs++;
83 }
84
85 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
86 {
87 if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
88 dev->ioport_id = ioport;
89 }
90 }
91
92 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
93 {
94 memory_region_add_subregion(isabus->address_space_io, start, io);
95 isa_init_ioport(dev, start);
96 }
97
98 void isa_register_portio_list(ISADevice *dev, uint16_t start,
99 const MemoryRegionPortio *pio_start,
100 void *opaque, const char *name)
101 {
102 PortioList *piolist = g_new(PortioList, 1);
103
104 /* START is how we should treat DEV, regardless of the actual
105 contents of the portio array. This is how the old code
106 actually handled e.g. the FDC device. */
107 isa_init_ioport(dev, start);
108
109 portio_list_init(piolist, pio_start, opaque, name);
110 portio_list_add(piolist, isabus->address_space_io, start);
111 }
112
113 static int isa_qdev_init(DeviceState *qdev, DeviceInfo *base)
114 {
115 ISADevice *dev = ISA_DEVICE(qdev);
116 ISADeviceClass *klass = ISA_DEVICE_GET_CLASS(dev);
117
118 dev->isairq[0] = -1;
119 dev->isairq[1] = -1;
120
121 if (klass->init) {
122 return klass->init(dev);
123 }
124
125 return 0;
126 }
127
128 void isa_qdev_register_subclass(DeviceInfo *info, const char *parent)
129 {
130 info->init = isa_qdev_init;
131 info->bus_info = &isa_bus_info;
132 qdev_register_subclass(info, parent);
133 }
134
135 void isa_qdev_register(DeviceInfo *info)
136 {
137 isa_qdev_register_subclass(info, TYPE_ISA_DEVICE);
138 }
139
140 ISADevice *isa_create(ISABus *bus, const char *name)
141 {
142 DeviceState *dev;
143
144 if (!bus) {
145 hw_error("Tried to create isa device %s with no isa bus present.",
146 name);
147 }
148 dev = qdev_create(&bus->qbus, name);
149 return ISA_DEVICE(dev);
150 }
151
152 ISADevice *isa_try_create(ISABus *bus, const char *name)
153 {
154 DeviceState *dev;
155
156 if (!bus) {
157 hw_error("Tried to create isa device %s with no isa bus present.",
158 name);
159 }
160 dev = qdev_try_create(&bus->qbus, name);
161 return ISA_DEVICE(dev);
162 }
163
164 ISADevice *isa_create_simple(ISABus *bus, const char *name)
165 {
166 ISADevice *dev;
167
168 dev = isa_create(bus, name);
169 qdev_init_nofail(&dev->qdev);
170 return dev;
171 }
172
173 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
174 {
175 ISADevice *d = ISA_DEVICE(dev);
176
177 if (d->isairq[1] != -1) {
178 monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
179 d->isairq[0], d->isairq[1]);
180 } else if (d->isairq[0] != -1) {
181 monitor_printf(mon, "%*sisa irq %d\n", indent, "",
182 d->isairq[0]);
183 }
184 }
185
186 static int isabus_bridge_init(SysBusDevice *dev)
187 {
188 /* nothing */
189 return 0;
190 }
191
192 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
193 {
194 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
195
196 k->init = isabus_bridge_init;
197 }
198
199 static DeviceInfo isabus_bridge_info = {
200 .name = "isabus-bridge",
201 .fw_name = "isa",
202 .size = sizeof(SysBusDevice),
203 .no_user = 1,
204 .class_init = isabus_bridge_class_init,
205 };
206
207 static TypeInfo isa_device_type_info = {
208 .name = TYPE_ISA_DEVICE,
209 .parent = TYPE_DEVICE,
210 .instance_size = sizeof(ISADevice),
211 .abstract = true,
212 .class_size = sizeof(ISADeviceClass),
213 };
214
215 static void isabus_register_devices(void)
216 {
217 sysbus_register_withprop(&isabus_bridge_info);
218 type_register_static(&isa_device_type_info);
219 }
220
221 static char *isabus_get_fw_dev_path(DeviceState *dev)
222 {
223 ISADevice *d = (ISADevice*)dev;
224 char path[40];
225 int off;
226
227 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
228 if (d->ioport_id) {
229 snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
230 }
231
232 return strdup(path);
233 }
234
235 MemoryRegion *isa_address_space(ISADevice *dev)
236 {
237 return get_system_memory();
238 }
239
240 device_init(isabus_register_devices)