Merge remote-tracking branch 'bonzini/nbd-next' into staging
[qemu/kevin.git] / hw / sysbus.c
blobdb4efccef40bbf6dca7d32ccd78bec2d2c5e21d0
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 struct BusInfo system_bus_info = {
28 .name = "System",
29 .size = sizeof(BusState),
30 .print_dev = sysbus_dev_print,
31 .get_fw_dev_path = sysbus_get_fw_dev_path,
34 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
36 assert(n >= 0 && n < dev->num_irq);
37 dev->irqs[n] = NULL;
38 if (dev->irqp[n]) {
39 *dev->irqp[n] = irq;
43 void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
45 assert(n >= 0 && n < dev->num_mmio);
47 if (dev->mmio[n].addr == addr) {
48 /* ??? region already mapped here. */
49 return;
51 if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
52 /* Unregister previous mapping. */
53 memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
55 dev->mmio[n].addr = addr;
56 memory_region_add_subregion(get_system_memory(),
57 addr,
58 dev->mmio[n].memory);
62 /* Request an IRQ source. The actual IRQ object may be populated later. */
63 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
65 int n;
67 assert(dev->num_irq < QDEV_MAX_IRQ);
68 n = dev->num_irq++;
69 dev->irqp[n] = p;
72 /* Pass IRQs from a target device. */
73 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
75 int i;
76 assert(dev->num_irq == 0);
77 dev->num_irq = target->num_irq;
78 for (i = 0; i < dev->num_irq; i++) {
79 dev->irqp[i] = target->irqp[i];
83 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
85 int n;
87 assert(dev->num_mmio < QDEV_MAX_MMIO);
88 n = dev->num_mmio++;
89 dev->mmio[n].addr = -1;
90 dev->mmio[n].memory = memory;
93 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
95 return dev->mmio[n].memory;
98 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
100 pio_addr_t i;
102 for (i = 0; i < size; i++) {
103 assert(dev->num_pio < QDEV_MAX_PIO);
104 dev->pio[dev->num_pio++] = ioport++;
108 static int sysbus_device_init(DeviceState *dev)
110 SysBusDevice *sd = SYS_BUS_DEVICE(dev);
111 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);
113 return sbc->init(sd);
116 DeviceState *sysbus_create_varargs(const char *name,
117 target_phys_addr_t addr, ...)
119 DeviceState *dev;
120 SysBusDevice *s;
121 va_list va;
122 qemu_irq irq;
123 int n;
125 dev = qdev_create(NULL, name);
126 s = sysbus_from_qdev(dev);
127 qdev_init_nofail(dev);
128 if (addr != (target_phys_addr_t)-1) {
129 sysbus_mmio_map(s, 0, addr);
131 va_start(va, addr);
132 n = 0;
133 while (1) {
134 irq = va_arg(va, qemu_irq);
135 if (!irq) {
136 break;
138 sysbus_connect_irq(s, n, irq);
139 n++;
141 va_end(va);
142 return dev;
145 DeviceState *sysbus_try_create_varargs(const char *name,
146 target_phys_addr_t addr, ...)
148 DeviceState *dev;
149 SysBusDevice *s;
150 va_list va;
151 qemu_irq irq;
152 int n;
154 dev = qdev_try_create(NULL, name);
155 if (!dev) {
156 return NULL;
158 s = sysbus_from_qdev(dev);
159 qdev_init_nofail(dev);
160 if (addr != (target_phys_addr_t)-1) {
161 sysbus_mmio_map(s, 0, addr);
163 va_start(va, addr);
164 n = 0;
165 while (1) {
166 irq = va_arg(va, qemu_irq);
167 if (!irq) {
168 break;
170 sysbus_connect_irq(s, n, irq);
171 n++;
173 va_end(va);
174 return dev;
177 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
179 SysBusDevice *s = sysbus_from_qdev(dev);
180 target_phys_addr_t size;
181 int i;
183 monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
184 for (i = 0; i < s->num_mmio; i++) {
185 size = memory_region_size(s->mmio[i].memory);
186 monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
187 indent, "", s->mmio[i].addr, size);
191 static char *sysbus_get_fw_dev_path(DeviceState *dev)
193 SysBusDevice *s = sysbus_from_qdev(dev);
194 char path[40];
195 int off;
197 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
199 if (s->num_mmio) {
200 snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
201 s->mmio[0].addr);
202 } else if (s->num_pio) {
203 snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
206 return strdup(path);
209 void sysbus_add_memory(SysBusDevice *dev, target_phys_addr_t addr,
210 MemoryRegion *mem)
212 memory_region_add_subregion(get_system_memory(), addr, mem);
215 void sysbus_add_memory_overlap(SysBusDevice *dev, target_phys_addr_t addr,
216 MemoryRegion *mem, unsigned priority)
218 memory_region_add_subregion_overlap(get_system_memory(), addr, mem,
219 priority);
222 void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem)
224 memory_region_del_subregion(get_system_memory(), mem);
227 void sysbus_add_io(SysBusDevice *dev, target_phys_addr_t addr,
228 MemoryRegion *mem)
230 memory_region_add_subregion(get_system_io(), addr, mem);
233 void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
235 memory_region_del_subregion(get_system_io(), mem);
238 MemoryRegion *sysbus_address_space(SysBusDevice *dev)
240 return get_system_memory();
243 static void sysbus_device_class_init(ObjectClass *klass, void *data)
245 DeviceClass *k = DEVICE_CLASS(klass);
246 k->init = sysbus_device_init;
247 k->bus_info = &system_bus_info;
250 static TypeInfo sysbus_device_type_info = {
251 .name = TYPE_SYS_BUS_DEVICE,
252 .parent = TYPE_DEVICE,
253 .instance_size = sizeof(SysBusDevice),
254 .abstract = true,
255 .class_size = sizeof(SysBusDeviceClass),
256 .class_init = sysbus_device_class_init,
259 static void sysbus_register_types(void)
261 type_register_static(&sysbus_device_type_info);
264 type_init(sysbus_register_types)