root / hw / sysbus.c @ a8170e5e
History | View | Annotate | Download (7.7 kB)
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 "sysbus.h" |
21 |
#include "monitor.h" |
22 |
#include "exec-memory.h" |
23 |
|
24 |
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent); |
25 |
static char *sysbus_get_fw_dev_path(DeviceState *dev); |
26 |
|
27 |
static void system_bus_class_init(ObjectClass *klass, void *data) |
28 |
{ |
29 |
BusClass *k = BUS_CLASS(klass); |
30 |
|
31 |
k->print_dev = sysbus_dev_print; |
32 |
k->get_fw_dev_path = sysbus_get_fw_dev_path; |
33 |
} |
34 |
|
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, |
40 |
}; |
41 |
|
42 |
void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq) |
43 |
{ |
44 |
assert(n >= 0 && n < dev->num_irq);
|
45 |
dev->irqs[n] = NULL;
|
46 |
if (dev->irqp[n]) {
|
47 |
*dev->irqp[n] = irq; |
48 |
} |
49 |
} |
50 |
|
51 |
void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr) |
52 |
{ |
53 |
assert(n >= 0 && n < dev->num_mmio);
|
54 |
|
55 |
if (dev->mmio[n].addr == addr) {
|
56 |
/* ??? region already mapped here. */
|
57 |
return;
|
58 |
} |
59 |
if (dev->mmio[n].addr != (hwaddr)-1) { |
60 |
/* Unregister previous mapping. */
|
61 |
memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory); |
62 |
} |
63 |
dev->mmio[n].addr = addr; |
64 |
memory_region_add_subregion(get_system_memory(), |
65 |
addr, |
66 |
dev->mmio[n].memory); |
67 |
} |
68 |
|
69 |
|
70 |
/* Request an IRQ source. The actual IRQ object may be populated later. */
|
71 |
void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
|
72 |
{ |
73 |
int n;
|
74 |
|
75 |
assert(dev->num_irq < QDEV_MAX_IRQ); |
76 |
n = dev->num_irq++; |
77 |
dev->irqp[n] = p; |
78 |
} |
79 |
|
80 |
/* Pass IRQs from a target device. */
|
81 |
void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
|
82 |
{ |
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]; |
88 |
} |
89 |
} |
90 |
|
91 |
void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
|
92 |
{ |
93 |
int n;
|
94 |
|
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; |
99 |
} |
100 |
|
101 |
MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
|
102 |
{ |
103 |
return dev->mmio[n].memory;
|
104 |
} |
105 |
|
106 |
void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
|
107 |
{ |
108 |
pio_addr_t i; |
109 |
|
110 |
for (i = 0; i < size; i++) { |
111 |
assert(dev->num_pio < QDEV_MAX_PIO); |
112 |
dev->pio[dev->num_pio++] = ioport++; |
113 |
} |
114 |
} |
115 |
|
116 |
static int sysbus_device_init(DeviceState *dev) |
117 |
{ |
118 |
SysBusDevice *sd = SYS_BUS_DEVICE(dev); |
119 |
SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd); |
120 |
|
121 |
return sbc->init(sd);
|
122 |
} |
123 |
|
124 |
DeviceState *sysbus_create_varargs(const char *name, |
125 |
hwaddr addr, ...) |
126 |
{ |
127 |
DeviceState *dev; |
128 |
SysBusDevice *s; |
129 |
va_list va; |
130 |
qemu_irq irq; |
131 |
int n;
|
132 |
|
133 |
dev = qdev_create(NULL, name);
|
134 |
s = sysbus_from_qdev(dev); |
135 |
qdev_init_nofail(dev); |
136 |
if (addr != (hwaddr)-1) { |
137 |
sysbus_mmio_map(s, 0, addr);
|
138 |
} |
139 |
va_start(va, addr); |
140 |
n = 0;
|
141 |
while (1) { |
142 |
irq = va_arg(va, qemu_irq); |
143 |
if (!irq) {
|
144 |
break;
|
145 |
} |
146 |
sysbus_connect_irq(s, n, irq); |
147 |
n++; |
148 |
} |
149 |
va_end(va); |
150 |
return dev;
|
151 |
} |
152 |
|
153 |
DeviceState *sysbus_try_create_varargs(const char *name, |
154 |
hwaddr addr, ...) |
155 |
{ |
156 |
DeviceState *dev; |
157 |
SysBusDevice *s; |
158 |
va_list va; |
159 |
qemu_irq irq; |
160 |
int n;
|
161 |
|
162 |
dev = qdev_try_create(NULL, name);
|
163 |
if (!dev) {
|
164 |
return NULL; |
165 |
} |
166 |
s = sysbus_from_qdev(dev); |
167 |
qdev_init_nofail(dev); |
168 |
if (addr != (hwaddr)-1) { |
169 |
sysbus_mmio_map(s, 0, addr);
|
170 |
} |
171 |
va_start(va, addr); |
172 |
n = 0;
|
173 |
while (1) { |
174 |
irq = va_arg(va, qemu_irq); |
175 |
if (!irq) {
|
176 |
break;
|
177 |
} |
178 |
sysbus_connect_irq(s, n, irq); |
179 |
n++; |
180 |
} |
181 |
va_end(va); |
182 |
return dev;
|
183 |
} |
184 |
|
185 |
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent) |
186 |
{ |
187 |
SysBusDevice *s = sysbus_from_qdev(dev); |
188 |
hwaddr size; |
189 |
int i;
|
190 |
|
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);
|
196 |
} |
197 |
} |
198 |
|
199 |
static char *sysbus_get_fw_dev_path(DeviceState *dev) |
200 |
{ |
201 |
SysBusDevice *s = sysbus_from_qdev(dev); |
202 |
char path[40]; |
203 |
int off;
|
204 |
|
205 |
off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev)); |
206 |
|
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]); |
212 |
} |
213 |
|
214 |
return g_strdup(path);
|
215 |
} |
216 |
|
217 |
void sysbus_add_memory(SysBusDevice *dev, hwaddr addr,
|
218 |
MemoryRegion *mem) |
219 |
{ |
220 |
memory_region_add_subregion(get_system_memory(), addr, mem); |
221 |
} |
222 |
|
223 |
void sysbus_add_memory_overlap(SysBusDevice *dev, hwaddr addr,
|
224 |
MemoryRegion *mem, unsigned priority)
|
225 |
{ |
226 |
memory_region_add_subregion_overlap(get_system_memory(), addr, mem, |
227 |
priority); |
228 |
} |
229 |
|
230 |
void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem)
|
231 |
{ |
232 |
memory_region_del_subregion(get_system_memory(), mem); |
233 |
} |
234 |
|
235 |
void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
|
236 |
MemoryRegion *mem) |
237 |
{ |
238 |
memory_region_add_subregion(get_system_io(), addr, mem); |
239 |
} |
240 |
|
241 |
void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
|
242 |
{ |
243 |
memory_region_del_subregion(get_system_io(), mem); |
244 |
} |
245 |
|
246 |
MemoryRegion *sysbus_address_space(SysBusDevice *dev) |
247 |
{ |
248 |
return get_system_memory();
|
249 |
} |
250 |
|
251 |
static void sysbus_device_class_init(ObjectClass *klass, void *data) |
252 |
{ |
253 |
DeviceClass *k = DEVICE_CLASS(klass); |
254 |
k->init = sysbus_device_init; |
255 |
k->bus_type = TYPE_SYSTEM_BUS; |
256 |
} |
257 |
|
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, |
265 |
}; |
266 |
|
267 |
/* This is a nasty hack to allow passing a NULL bus to qdev_create. */
|
268 |
static BusState *main_system_bus;
|
269 |
|
270 |
static void main_system_bus_create(void) |
271 |
{ |
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); |
281 |
} |
282 |
|
283 |
BusState *sysbus_get_default(void)
|
284 |
{ |
285 |
if (!main_system_bus) {
|
286 |
main_system_bus_create(); |
287 |
} |
288 |
return main_system_bus;
|
289 |
} |
290 |
|
291 |
static void sysbus_register_types(void) |
292 |
{ |
293 |
type_register_static(&system_bus_info); |
294 |
type_register_static(&sysbus_device_type_info); |
295 |
} |
296 |
|
297 |
type_init(sysbus_register_types) |