Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20150212' into staging
[qemu-kvm.git] / hw / core / sysbus.c
blob84af59379d8de5a70eb2531ba84e44f48fc3fde3
1 /*
2 * System (CPU) Bus device support code
4 * Copyright (c) 2009 CodeSourcery
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.
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.
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/>.
20 #include "hw/sysbus.h"
21 #include "monitor/monitor.h"
22 #include "exec/address-spaces.h"
24 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
25 static char *sysbus_get_fw_dev_path(DeviceState *dev);
27 typedef struct SysBusFind {
28 void *opaque;
29 FindSysbusDeviceFunc *func;
30 } SysBusFind;
32 /* Run func() for every sysbus device, traverse the tree for everything else */
33 static int find_sysbus_device(Object *obj, void *opaque)
35 SysBusFind *find = opaque;
36 Object *dev;
37 SysBusDevice *sbdev;
39 dev = object_dynamic_cast(obj, TYPE_SYS_BUS_DEVICE);
40 sbdev = (SysBusDevice *)dev;
42 if (!sbdev) {
43 /* Container, traverse it for children */
44 return object_child_foreach(obj, find_sysbus_device, opaque);
47 find->func(sbdev, find->opaque);
49 return 0;
53 * Loop through all dynamically created sysbus devices and call
54 * func() for each instance.
56 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque)
58 Object *container;
59 SysBusFind find = {
60 .func = func,
61 .opaque = opaque,
64 /* Loop through all sysbus devices that were spawened outside the machine */
65 container = container_get(qdev_get_machine(), "/peripheral");
66 find_sysbus_device(container, &find);
67 container = container_get(qdev_get_machine(), "/peripheral-anon");
68 find_sysbus_device(container, &find);
72 static void system_bus_class_init(ObjectClass *klass, void *data)
74 BusClass *k = BUS_CLASS(klass);
76 k->print_dev = sysbus_dev_print;
77 k->get_fw_dev_path = sysbus_get_fw_dev_path;
80 static const TypeInfo system_bus_info = {
81 .name = TYPE_SYSTEM_BUS,
82 .parent = TYPE_BUS,
83 .instance_size = sizeof(BusState),
84 .class_init = system_bus_class_init,
87 /* Check whether an IRQ source exists */
88 bool sysbus_has_irq(SysBusDevice *dev, int n)
90 char *prop = g_strdup_printf("%s[%d]", SYSBUS_DEVICE_GPIO_IRQ, n);
91 ObjectProperty *r;
93 r = object_property_find(OBJECT(dev), prop, NULL);
94 return (r != NULL);
97 bool sysbus_is_irq_connected(SysBusDevice *dev, int n)
99 return !!sysbus_get_connected_irq(dev, n);
102 qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n)
104 DeviceState *d = DEVICE(dev);
105 return qdev_get_gpio_out_connector(d, SYSBUS_DEVICE_GPIO_IRQ, n);
108 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
110 qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
113 /* Check whether an MMIO region exists */
114 bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n)
116 return (n < dev->num_mmio);
119 static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr,
120 bool may_overlap, int priority)
122 assert(n >= 0 && n < dev->num_mmio);
124 if (dev->mmio[n].addr == addr) {
125 /* ??? region already mapped here. */
126 return;
128 if (dev->mmio[n].addr != (hwaddr)-1) {
129 /* Unregister previous mapping. */
130 memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
132 dev->mmio[n].addr = addr;
133 if (may_overlap) {
134 memory_region_add_subregion_overlap(get_system_memory(),
135 addr,
136 dev->mmio[n].memory,
137 priority);
139 else {
140 memory_region_add_subregion(get_system_memory(),
141 addr,
142 dev->mmio[n].memory);
146 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr)
148 sysbus_mmio_map_common(dev, n, addr, false, 0);
151 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
152 int priority)
154 sysbus_mmio_map_common(dev, n, addr, true, priority);
157 /* Request an IRQ source. The actual IRQ object may be populated later. */
158 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
160 qdev_init_gpio_out_named(DEVICE(dev), p, SYSBUS_DEVICE_GPIO_IRQ, 1);
163 /* Pass IRQs from a target device. */
164 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
166 qdev_pass_gpios(DEVICE(target), DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ);
169 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
171 int n;
173 assert(dev->num_mmio < QDEV_MAX_MMIO);
174 n = dev->num_mmio++;
175 dev->mmio[n].addr = -1;
176 dev->mmio[n].memory = memory;
179 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
181 return dev->mmio[n].memory;
184 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
186 pio_addr_t i;
188 for (i = 0; i < size; i++) {
189 assert(dev->num_pio < QDEV_MAX_PIO);
190 dev->pio[dev->num_pio++] = ioport++;
194 static int sysbus_device_init(DeviceState *dev)
196 SysBusDevice *sd = SYS_BUS_DEVICE(dev);
197 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);
199 if (!sbc->init) {
200 return 0;
202 return sbc->init(sd);
205 DeviceState *sysbus_create_varargs(const char *name,
206 hwaddr addr, ...)
208 DeviceState *dev;
209 SysBusDevice *s;
210 va_list va;
211 qemu_irq irq;
212 int n;
214 dev = qdev_create(NULL, name);
215 s = SYS_BUS_DEVICE(dev);
216 qdev_init_nofail(dev);
217 if (addr != (hwaddr)-1) {
218 sysbus_mmio_map(s, 0, addr);
220 va_start(va, addr);
221 n = 0;
222 while (1) {
223 irq = va_arg(va, qemu_irq);
224 if (!irq) {
225 break;
227 sysbus_connect_irq(s, n, irq);
228 n++;
230 va_end(va);
231 return dev;
234 DeviceState *sysbus_try_create_varargs(const char *name,
235 hwaddr addr, ...)
237 DeviceState *dev;
238 SysBusDevice *s;
239 va_list va;
240 qemu_irq irq;
241 int n;
243 dev = qdev_try_create(NULL, name);
244 if (!dev) {
245 return NULL;
247 s = SYS_BUS_DEVICE(dev);
248 qdev_init_nofail(dev);
249 if (addr != (hwaddr)-1) {
250 sysbus_mmio_map(s, 0, addr);
252 va_start(va, addr);
253 n = 0;
254 while (1) {
255 irq = va_arg(va, qemu_irq);
256 if (!irq) {
257 break;
259 sysbus_connect_irq(s, n, irq);
260 n++;
262 va_end(va);
263 return dev;
266 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
268 SysBusDevice *s = SYS_BUS_DEVICE(dev);
269 hwaddr size;
270 int i;
272 for (i = 0; i < s->num_mmio; i++) {
273 size = memory_region_size(s->mmio[i].memory);
274 monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
275 indent, "", s->mmio[i].addr, size);
279 static char *sysbus_get_fw_dev_path(DeviceState *dev)
281 SysBusDevice *s = SYS_BUS_DEVICE(dev);
282 char path[40];
283 int off;
285 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
287 if (s->num_mmio) {
288 snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
289 s->mmio[0].addr);
290 } else if (s->num_pio) {
291 snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
294 return g_strdup(path);
297 void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
298 MemoryRegion *mem)
300 memory_region_add_subregion(get_system_io(), addr, mem);
303 MemoryRegion *sysbus_address_space(SysBusDevice *dev)
305 return get_system_memory();
308 static void sysbus_device_class_init(ObjectClass *klass, void *data)
310 DeviceClass *k = DEVICE_CLASS(klass);
311 k->init = sysbus_device_init;
312 k->bus_type = TYPE_SYSTEM_BUS;
315 static const TypeInfo sysbus_device_type_info = {
316 .name = TYPE_SYS_BUS_DEVICE,
317 .parent = TYPE_DEVICE,
318 .instance_size = sizeof(SysBusDevice),
319 .abstract = true,
320 .class_size = sizeof(SysBusDeviceClass),
321 .class_init = sysbus_device_class_init,
324 /* This is a nasty hack to allow passing a NULL bus to qdev_create. */
325 static BusState *main_system_bus;
327 static void main_system_bus_create(void)
329 /* assign main_system_bus before qbus_create_inplace()
330 * in order to make "if (bus != sysbus_get_default())" work */
331 main_system_bus = g_malloc0(system_bus_info.instance_size);
332 qbus_create_inplace(main_system_bus, system_bus_info.instance_size,
333 TYPE_SYSTEM_BUS, NULL, "main-system-bus");
334 OBJECT(main_system_bus)->free = g_free;
335 object_property_add_child(container_get(qdev_get_machine(),
336 "/unattached"),
337 "sysbus", OBJECT(main_system_bus), NULL);
340 BusState *sysbus_get_default(void)
342 if (!main_system_bus) {
343 main_system_bus_create();
345 return main_system_bus;
348 static void sysbus_register_types(void)
350 type_register_static(&system_bus_info);
351 type_register_static(&sysbus_device_type_info);
354 type_init(sysbus_register_types)