hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / core / sysbus.c
1 /*
2 * System (CPU) Bus device support code
3 *
4 * Copyright (c) 2009 CodeSourcery
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
20 #include "qemu/osdep.h"
21 #include "qapi/error.h"
22 #include "qemu/module.h"
23 #include "hw/sysbus.h"
24 #include "monitor/monitor.h"
25 #include "exec/address-spaces.h"
26
27 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
28 static char *sysbus_get_fw_dev_path(DeviceState *dev);
29
30 typedef struct SysBusFind {
31 void *opaque;
32 FindSysbusDeviceFunc *func;
33 } SysBusFind;
34
35 /* Run func() for every sysbus device, traverse the tree for everything else */
36 static int find_sysbus_device(Object *obj, void *opaque)
37 {
38 SysBusFind *find = opaque;
39 Object *dev;
40 SysBusDevice *sbdev;
41
42 dev = object_dynamic_cast(obj, TYPE_SYS_BUS_DEVICE);
43 sbdev = (SysBusDevice *)dev;
44
45 if (!sbdev) {
46 /* Container, traverse it for children */
47 return object_child_foreach(obj, find_sysbus_device, opaque);
48 }
49
50 find->func(sbdev, find->opaque);
51
52 return 0;
53 }
54
55 /*
56 * Loop through all dynamically created sysbus devices and call
57 * func() for each instance.
58 */
59 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque)
60 {
61 Object *container;
62 SysBusFind find = {
63 .func = func,
64 .opaque = opaque,
65 };
66
67 /* Loop through all sysbus devices that were spawned outside the machine */
68 container = container_get(qdev_get_machine(), "/peripheral");
69 find_sysbus_device(container, &find);
70 container = container_get(qdev_get_machine(), "/peripheral-anon");
71 find_sysbus_device(container, &find);
72 }
73
74
75 static void system_bus_class_init(ObjectClass *klass, void *data)
76 {
77 BusClass *k = BUS_CLASS(klass);
78
79 k->print_dev = sysbus_dev_print;
80 k->get_fw_dev_path = sysbus_get_fw_dev_path;
81 }
82
83 static const TypeInfo system_bus_info = {
84 .name = TYPE_SYSTEM_BUS,
85 .parent = TYPE_BUS,
86 .instance_size = sizeof(BusState),
87 .class_init = system_bus_class_init,
88 };
89
90 /* Check whether an IRQ source exists */
91 bool sysbus_has_irq(SysBusDevice *dev, int n)
92 {
93 char *prop = g_strdup_printf("%s[%d]", SYSBUS_DEVICE_GPIO_IRQ, n);
94 ObjectProperty *r;
95
96 r = object_property_find(OBJECT(dev), prop);
97 g_free(prop);
98
99 return (r != NULL);
100 }
101
102 bool sysbus_is_irq_connected(SysBusDevice *dev, int n)
103 {
104 return !!sysbus_get_connected_irq(dev, n);
105 }
106
107 qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n)
108 {
109 DeviceState *d = DEVICE(dev);
110 return qdev_get_gpio_out_connector(d, SYSBUS_DEVICE_GPIO_IRQ, n);
111 }
112
113 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
114 {
115 SysBusDeviceClass *sbd = SYS_BUS_DEVICE_GET_CLASS(dev);
116
117 qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
118
119 if (sbd->connect_irq_notifier) {
120 sbd->connect_irq_notifier(dev, irq);
121 }
122 }
123
124 /* Check whether an MMIO region exists */
125 bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n)
126 {
127 return (n < dev->num_mmio);
128 }
129
130 static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr,
131 bool may_overlap, int priority)
132 {
133 assert(n >= 0 && n < dev->num_mmio);
134
135 if (dev->mmio[n].addr == addr) {
136 /* ??? region already mapped here. */
137 return;
138 }
139 if (dev->mmio[n].addr != (hwaddr)-1) {
140 /* Unregister previous mapping. */
141 memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
142 }
143 dev->mmio[n].addr = addr;
144 if (may_overlap) {
145 memory_region_add_subregion_overlap(get_system_memory(),
146 addr,
147 dev->mmio[n].memory,
148 priority);
149 }
150 else {
151 memory_region_add_subregion(get_system_memory(),
152 addr,
153 dev->mmio[n].memory);
154 }
155 }
156
157 void sysbus_mmio_unmap(SysBusDevice *dev, int n)
158 {
159 assert(n >= 0 && n < dev->num_mmio);
160
161 if (dev->mmio[n].addr != (hwaddr)-1) {
162 memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
163 dev->mmio[n].addr = (hwaddr)-1;
164 }
165 }
166
167 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr)
168 {
169 sysbus_mmio_map_common(dev, n, addr, false, 0);
170 }
171
172 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
173 int priority)
174 {
175 sysbus_mmio_map_common(dev, n, addr, true, priority);
176 }
177
178 /* Request an IRQ source. The actual IRQ object may be populated later. */
179 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
180 {
181 qdev_init_gpio_out_named(DEVICE(dev), p, SYSBUS_DEVICE_GPIO_IRQ, 1);
182 }
183
184 /* Pass IRQs from a target device. */
185 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
186 {
187 qdev_pass_gpios(DEVICE(target), DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ);
188 }
189
190 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
191 {
192 int n;
193
194 assert(dev->num_mmio < QDEV_MAX_MMIO);
195 n = dev->num_mmio++;
196 dev->mmio[n].addr = -1;
197 dev->mmio[n].memory = memory;
198 }
199
200 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
201 {
202 assert(n >= 0 && n < QDEV_MAX_MMIO);
203 return dev->mmio[n].memory;
204 }
205
206 void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size)
207 {
208 uint32_t i;
209
210 for (i = 0; i < size; i++) {
211 assert(dev->num_pio < QDEV_MAX_PIO);
212 dev->pio[dev->num_pio++] = ioport++;
213 }
214 }
215
216 /* The purpose of preserving this empty realize function
217 * is to prevent the parent_realize field of some subclasses
218 * from being set to NULL to break the normal init/realize
219 * of some devices.
220 */
221 static void sysbus_device_realize(DeviceState *dev, Error **errp)
222 {
223 }
224
225 DeviceState *sysbus_create_varargs(const char *name,
226 hwaddr addr, ...)
227 {
228 DeviceState *dev;
229 SysBusDevice *s;
230 va_list va;
231 qemu_irq irq;
232 int n;
233
234 dev = qdev_new(name);
235 s = SYS_BUS_DEVICE(dev);
236 sysbus_realize_and_unref(s, &error_fatal);
237 if (addr != (hwaddr)-1) {
238 sysbus_mmio_map(s, 0, addr);
239 }
240 va_start(va, addr);
241 n = 0;
242 while (1) {
243 irq = va_arg(va, qemu_irq);
244 if (!irq) {
245 break;
246 }
247 sysbus_connect_irq(s, n, irq);
248 n++;
249 }
250 va_end(va);
251 return dev;
252 }
253
254 bool sysbus_realize(SysBusDevice *dev, Error **errp)
255 {
256 return qdev_realize(DEVICE(dev), sysbus_get_default(), errp);
257 }
258
259 bool sysbus_realize_and_unref(SysBusDevice *dev, Error **errp)
260 {
261 return qdev_realize_and_unref(DEVICE(dev), sysbus_get_default(), errp);
262 }
263
264 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
265 {
266 SysBusDevice *s = SYS_BUS_DEVICE(dev);
267 hwaddr size;
268 int i;
269
270 for (i = 0; i < s->num_mmio; i++) {
271 size = memory_region_size(s->mmio[i].memory);
272 monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
273 indent, "", s->mmio[i].addr, size);
274 }
275 }
276
277 static char *sysbus_get_fw_dev_path(DeviceState *dev)
278 {
279 SysBusDevice *s = SYS_BUS_DEVICE(dev);
280 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(s);
281 char *addr, *fw_dev_path;
282
283 if (sbc->explicit_ofw_unit_address) {
284 addr = sbc->explicit_ofw_unit_address(s);
285 if (addr) {
286 fw_dev_path = g_strdup_printf("%s@%s", qdev_fw_name(dev), addr);
287 g_free(addr);
288 return fw_dev_path;
289 }
290 }
291 if (s->num_mmio) {
292 return g_strdup_printf("%s@" TARGET_FMT_plx, qdev_fw_name(dev),
293 s->mmio[0].addr);
294 }
295 if (s->num_pio) {
296 return g_strdup_printf("%s@i%04x", qdev_fw_name(dev), s->pio[0]);
297 }
298 return g_strdup(qdev_fw_name(dev));
299 }
300
301 void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
302 MemoryRegion *mem)
303 {
304 memory_region_add_subregion(get_system_io(), addr, mem);
305 }
306
307 MemoryRegion *sysbus_address_space(SysBusDevice *dev)
308 {
309 return get_system_memory();
310 }
311
312 static void sysbus_device_class_init(ObjectClass *klass, void *data)
313 {
314 DeviceClass *k = DEVICE_CLASS(klass);
315 k->realize = sysbus_device_realize;
316 k->bus_type = TYPE_SYSTEM_BUS;
317 /*
318 * device_add plugs devices into a suitable bus. For "real" buses,
319 * that actually connects the device. For sysbus, the connections
320 * need to be made separately, and device_add can't do that. The
321 * device would be left unconnected, and will probably not work
322 *
323 * However, a few machines can handle device_add/-device with
324 * a few specific sysbus devices. In those cases, the device
325 * subclass needs to override it and set user_creatable=true.
326 */
327 k->user_creatable = false;
328 }
329
330 static const TypeInfo sysbus_device_type_info = {
331 .name = TYPE_SYS_BUS_DEVICE,
332 .parent = TYPE_DEVICE,
333 .instance_size = sizeof(SysBusDevice),
334 .abstract = true,
335 .class_size = sizeof(SysBusDeviceClass),
336 .class_init = sysbus_device_class_init,
337 };
338
339 static BusState *main_system_bus;
340
341 static void main_system_bus_create(void)
342 {
343 /* assign main_system_bus before qbus_create_inplace()
344 * in order to make "if (bus != sysbus_get_default())" work */
345 main_system_bus = g_malloc0(system_bus_info.instance_size);
346 qbus_create_inplace(main_system_bus, system_bus_info.instance_size,
347 TYPE_SYSTEM_BUS, NULL, "main-system-bus");
348 OBJECT(main_system_bus)->free = g_free;
349 }
350
351 BusState *sysbus_get_default(void)
352 {
353 if (!main_system_bus) {
354 main_system_bus_create();
355 }
356 return main_system_bus;
357 }
358
359 static void sysbus_register_types(void)
360 {
361 type_register_static(&system_bus_info);
362 type_register_static(&sysbus_device_type_info);
363 }
364
365 type_init(sysbus_register_types)