qdev: Connect busses with their parent devices
[qemu-kvm.git] / hw / sysbus.c
blob9d8b1eaf7d8191d08267284f611fd4fafe5eb218
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 "sysbus.h"
21 #include "monitor.h"
22 #include "exec-memory.h"
24 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
25 static char *sysbus_get_fw_dev_path(DeviceState *dev);
27 static void system_bus_class_init(ObjectClass *klass, void *data)
29 BusClass *k = BUS_CLASS(klass);
31 k->print_dev = sysbus_dev_print;
32 k->get_fw_dev_path = sysbus_get_fw_dev_path;
35 static const TypeInfo system_bus_info = {
36 .name = TYPE_SYSTEM_BUS,
37 .parent = TYPE_BUS,
38 .instance_size = sizeof(BusState),
39 .class_init = system_bus_class_init,
42 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
44 assert(n >= 0 && n < dev->num_irq);
45 dev->irqs[n] = NULL;
46 if (dev->irqp[n]) {
47 *dev->irqp[n] = irq;
51 void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
53 assert(n >= 0 && n < dev->num_mmio);
55 if (dev->mmio[n].addr == addr) {
56 /* ??? region already mapped here. */
57 return;
59 if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
60 /* Unregister previous mapping. */
61 memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
63 dev->mmio[n].addr = addr;
64 memory_region_add_subregion(get_system_memory(),
65 addr,
66 dev->mmio[n].memory);
70 /* Request an IRQ source. The actual IRQ object may be populated later. */
71 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
73 int n;
75 assert(dev->num_irq < QDEV_MAX_IRQ);
76 n = dev->num_irq++;
77 dev->irqp[n] = p;
80 /* Pass IRQs from a target device. */
81 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
83 int i;
84 assert(dev->num_irq == 0);
85 dev->num_irq = target->num_irq;
86 for (i = 0; i < dev->num_irq; i++) {
87 dev->irqp[i] = target->irqp[i];
91 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
93 int n;
95 assert(dev->num_mmio < QDEV_MAX_MMIO);
96 n = dev->num_mmio++;
97 dev->mmio[n].addr = -1;
98 dev->mmio[n].memory = memory;
101 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
103 return dev->mmio[n].memory;
106 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
108 pio_addr_t i;
110 for (i = 0; i < size; i++) {
111 assert(dev->num_pio < QDEV_MAX_PIO);
112 dev->pio[dev->num_pio++] = ioport++;
116 static int sysbus_device_init(DeviceState *dev)
118 SysBusDevice *sd = SYS_BUS_DEVICE(dev);
119 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);
121 return sbc->init(sd);
124 DeviceState *sysbus_create_varargs(const char *name,
125 target_phys_addr_t addr, ...)
127 DeviceState *dev;
128 SysBusDevice *s;
129 va_list va;
130 qemu_irq irq;
131 int n;
133 dev = qdev_create(NULL, name);
134 s = sysbus_from_qdev(dev);
135 qdev_init_nofail(dev);
136 if (addr != (target_phys_addr_t)-1) {
137 sysbus_mmio_map(s, 0, addr);
139 va_start(va, addr);
140 n = 0;
141 while (1) {
142 irq = va_arg(va, qemu_irq);
143 if (!irq) {
144 break;
146 sysbus_connect_irq(s, n, irq);
147 n++;
149 va_end(va);
150 return dev;
153 DeviceState *sysbus_try_create_varargs(const char *name,
154 target_phys_addr_t addr, ...)
156 DeviceState *dev;
157 SysBusDevice *s;
158 va_list va;
159 qemu_irq irq;
160 int n;
162 dev = qdev_try_create(NULL, name);
163 if (!dev) {
164 return NULL;
166 s = sysbus_from_qdev(dev);
167 qdev_init_nofail(dev);
168 if (addr != (target_phys_addr_t)-1) {
169 sysbus_mmio_map(s, 0, addr);
171 va_start(va, addr);
172 n = 0;
173 while (1) {
174 irq = va_arg(va, qemu_irq);
175 if (!irq) {
176 break;
178 sysbus_connect_irq(s, n, irq);
179 n++;
181 va_end(va);
182 return dev;
185 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
187 SysBusDevice *s = sysbus_from_qdev(dev);
188 target_phys_addr_t size;
189 int i;
191 monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
192 for (i = 0; i < s->num_mmio; i++) {
193 size = memory_region_size(s->mmio[i].memory);
194 monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
195 indent, "", s->mmio[i].addr, size);
199 static char *sysbus_get_fw_dev_path(DeviceState *dev)
201 SysBusDevice *s = sysbus_from_qdev(dev);
202 char path[40];
203 int off;
205 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
207 if (s->num_mmio) {
208 snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
209 s->mmio[0].addr);
210 } else if (s->num_pio) {
211 snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
214 return strdup(path);
217 void sysbus_add_memory(SysBusDevice *dev, target_phys_addr_t addr,
218 MemoryRegion *mem)
220 memory_region_add_subregion(get_system_memory(), addr, mem);
223 void sysbus_add_memory_overlap(SysBusDevice *dev, target_phys_addr_t addr,
224 MemoryRegion *mem, unsigned priority)
226 memory_region_add_subregion_overlap(get_system_memory(), addr, mem,
227 priority);
230 void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem)
232 memory_region_del_subregion(get_system_memory(), mem);
235 void sysbus_add_io(SysBusDevice *dev, target_phys_addr_t addr,
236 MemoryRegion *mem)
238 memory_region_add_subregion(get_system_io(), addr, mem);
241 void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
243 memory_region_del_subregion(get_system_io(), mem);
246 MemoryRegion *sysbus_address_space(SysBusDevice *dev)
248 return get_system_memory();
251 static void sysbus_device_class_init(ObjectClass *klass, void *data)
253 DeviceClass *k = DEVICE_CLASS(klass);
254 k->init = sysbus_device_init;
255 k->bus_type = TYPE_SYSTEM_BUS;
258 static TypeInfo sysbus_device_type_info = {
259 .name = TYPE_SYS_BUS_DEVICE,
260 .parent = TYPE_DEVICE,
261 .instance_size = sizeof(SysBusDevice),
262 .abstract = true,
263 .class_size = sizeof(SysBusDeviceClass),
264 .class_init = sysbus_device_class_init,
267 /* This is a nasty hack to allow passing a NULL bus to qdev_create. */
268 static BusState *main_system_bus;
270 static void main_system_bus_create(void)
272 /* assign main_system_bus before qbus_create_inplace()
273 * in order to make "if (bus != sysbus_get_default())" work */
274 main_system_bus = g_malloc0(system_bus_info.instance_size);
275 qbus_create_inplace(main_system_bus, TYPE_SYSTEM_BUS, NULL,
276 "main-system-bus");
277 main_system_bus->glib_allocated = true;
278 object_property_add_child(container_get(qdev_get_machine(),
279 "/unattached"),
280 "sysbus", OBJECT(main_system_bus), NULL);
283 BusState *sysbus_get_default(void)
285 if (!main_system_bus) {
286 main_system_bus_create();
288 return main_system_bus;
291 static void sysbus_register_types(void)
293 type_register_static(&system_bus_info);
294 type_register_static(&sysbus_device_type_info);
297 type_init(sysbus_register_types)