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 "qemu/osdep.h"
21 #include "qapi/error.h"
22 #include "hw/sysbus.h"
23 #include "monitor/monitor.h"
24 #include "exec/address-spaces.h"
26 static void sysbus_dev_print(Monitor
*mon
, DeviceState
*dev
, int indent
);
27 static char *sysbus_get_fw_dev_path(DeviceState
*dev
);
29 typedef struct SysBusFind
{
31 FindSysbusDeviceFunc
*func
;
34 /* Run func() for every sysbus device, traverse the tree for everything else */
35 static int find_sysbus_device(Object
*obj
, void *opaque
)
37 SysBusFind
*find
= opaque
;
41 dev
= object_dynamic_cast(obj
, TYPE_SYS_BUS_DEVICE
);
42 sbdev
= (SysBusDevice
*)dev
;
45 /* Container, traverse it for children */
46 return object_child_foreach(obj
, find_sysbus_device
, opaque
);
49 find
->func(sbdev
, find
->opaque
);
55 * Loop through all dynamically created sysbus devices and call
56 * func() for each instance.
58 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc
*func
, void *opaque
)
66 /* Loop through all sysbus devices that were spawened outside the machine */
67 container
= container_get(qdev_get_machine(), "/peripheral");
68 find_sysbus_device(container
, &find
);
69 container
= container_get(qdev_get_machine(), "/peripheral-anon");
70 find_sysbus_device(container
, &find
);
74 static void system_bus_class_init(ObjectClass
*klass
, void *data
)
76 BusClass
*k
= BUS_CLASS(klass
);
78 k
->print_dev
= sysbus_dev_print
;
79 k
->get_fw_dev_path
= sysbus_get_fw_dev_path
;
82 static const TypeInfo system_bus_info
= {
83 .name
= TYPE_SYSTEM_BUS
,
85 .instance_size
= sizeof(BusState
),
86 .class_init
= system_bus_class_init
,
89 /* Check whether an IRQ source exists */
90 bool sysbus_has_irq(SysBusDevice
*dev
, int n
)
92 char *prop
= g_strdup_printf("%s[%d]", SYSBUS_DEVICE_GPIO_IRQ
, n
);
95 r
= object_property_find(OBJECT(dev
), prop
, NULL
);
101 bool sysbus_is_irq_connected(SysBusDevice
*dev
, int n
)
103 return !!sysbus_get_connected_irq(dev
, n
);
106 qemu_irq
sysbus_get_connected_irq(SysBusDevice
*dev
, int n
)
108 DeviceState
*d
= DEVICE(dev
);
109 return qdev_get_gpio_out_connector(d
, SYSBUS_DEVICE_GPIO_IRQ
, n
);
112 void sysbus_connect_irq(SysBusDevice
*dev
, int n
, qemu_irq irq
)
114 SysBusDeviceClass
*sbd
= SYS_BUS_DEVICE_GET_CLASS(dev
);
116 qdev_connect_gpio_out_named(DEVICE(dev
), SYSBUS_DEVICE_GPIO_IRQ
, n
, irq
);
118 if (sbd
->connect_irq_notifier
) {
119 sbd
->connect_irq_notifier(dev
, irq
);
123 /* Check whether an MMIO region exists */
124 bool sysbus_has_mmio(SysBusDevice
*dev
, unsigned int n
)
126 return (n
< dev
->num_mmio
);
129 static void sysbus_mmio_map_common(SysBusDevice
*dev
, int n
, hwaddr addr
,
130 bool may_overlap
, int priority
)
132 assert(n
>= 0 && n
< dev
->num_mmio
);
134 if (dev
->mmio
[n
].addr
== addr
) {
135 /* ??? region already mapped here. */
138 if (dev
->mmio
[n
].addr
!= (hwaddr
)-1) {
139 /* Unregister previous mapping. */
140 memory_region_del_subregion(get_system_memory(), dev
->mmio
[n
].memory
);
142 dev
->mmio
[n
].addr
= addr
;
144 memory_region_add_subregion_overlap(get_system_memory(),
150 memory_region_add_subregion(get_system_memory(),
152 dev
->mmio
[n
].memory
);
156 void sysbus_mmio_unmap(SysBusDevice
*dev
, int n
)
158 assert(n
>= 0 && n
< dev
->num_mmio
);
160 if (dev
->mmio
[n
].addr
!= (hwaddr
)-1) {
161 memory_region_del_subregion(get_system_memory(), dev
->mmio
[n
].memory
);
162 dev
->mmio
[n
].addr
= (hwaddr
)-1;
166 void sysbus_mmio_map(SysBusDevice
*dev
, int n
, hwaddr addr
)
168 sysbus_mmio_map_common(dev
, n
, addr
, false, 0);
171 void sysbus_mmio_map_overlap(SysBusDevice
*dev
, int n
, hwaddr addr
,
174 sysbus_mmio_map_common(dev
, n
, addr
, true, priority
);
177 /* Request an IRQ source. The actual IRQ object may be populated later. */
178 void sysbus_init_irq(SysBusDevice
*dev
, qemu_irq
*p
)
180 qdev_init_gpio_out_named(DEVICE(dev
), p
, SYSBUS_DEVICE_GPIO_IRQ
, 1);
183 /* Pass IRQs from a target device. */
184 void sysbus_pass_irq(SysBusDevice
*dev
, SysBusDevice
*target
)
186 qdev_pass_gpios(DEVICE(target
), DEVICE(dev
), SYSBUS_DEVICE_GPIO_IRQ
);
189 void sysbus_init_mmio(SysBusDevice
*dev
, MemoryRegion
*memory
)
193 assert(dev
->num_mmio
< QDEV_MAX_MMIO
);
195 dev
->mmio
[n
].addr
= -1;
196 dev
->mmio
[n
].memory
= memory
;
199 MemoryRegion
*sysbus_mmio_get_region(SysBusDevice
*dev
, int n
)
201 return dev
->mmio
[n
].memory
;
204 void sysbus_init_ioports(SysBusDevice
*dev
, uint32_t ioport
, uint32_t size
)
208 for (i
= 0; i
< size
; i
++) {
209 assert(dev
->num_pio
< QDEV_MAX_PIO
);
210 dev
->pio
[dev
->num_pio
++] = ioport
++;
214 /* The purpose of preserving this empty realize function
215 * is to prevent the parent_realize field of some subclasses
216 * from being set to NULL to break the normal init/realize
219 static void sysbus_realize(DeviceState
*dev
, Error
**errp
)
223 DeviceState
*sysbus_create_varargs(const char *name
,
232 dev
= qdev_create(NULL
, name
);
233 s
= SYS_BUS_DEVICE(dev
);
234 qdev_init_nofail(dev
);
235 if (addr
!= (hwaddr
)-1) {
236 sysbus_mmio_map(s
, 0, addr
);
241 irq
= va_arg(va
, qemu_irq
);
245 sysbus_connect_irq(s
, n
, irq
);
252 DeviceState
*sysbus_try_create_varargs(const char *name
,
261 dev
= qdev_try_create(NULL
, name
);
265 s
= SYS_BUS_DEVICE(dev
);
266 qdev_init_nofail(dev
);
267 if (addr
!= (hwaddr
)-1) {
268 sysbus_mmio_map(s
, 0, addr
);
273 irq
= va_arg(va
, qemu_irq
);
277 sysbus_connect_irq(s
, n
, irq
);
284 static void sysbus_dev_print(Monitor
*mon
, DeviceState
*dev
, int indent
)
286 SysBusDevice
*s
= SYS_BUS_DEVICE(dev
);
290 for (i
= 0; i
< s
->num_mmio
; i
++) {
291 size
= memory_region_size(s
->mmio
[i
].memory
);
292 monitor_printf(mon
, "%*smmio " TARGET_FMT_plx
"/" TARGET_FMT_plx
"\n",
293 indent
, "", s
->mmio
[i
].addr
, size
);
297 static char *sysbus_get_fw_dev_path(DeviceState
*dev
)
299 SysBusDevice
*s
= SYS_BUS_DEVICE(dev
);
300 SysBusDeviceClass
*sbc
= SYS_BUS_DEVICE_GET_CLASS(s
);
301 char *addr
, *fw_dev_path
;
303 if (sbc
->explicit_ofw_unit_address
) {
304 addr
= sbc
->explicit_ofw_unit_address(s
);
306 fw_dev_path
= g_strdup_printf("%s@%s", qdev_fw_name(dev
), addr
);
312 return g_strdup_printf("%s@" TARGET_FMT_plx
, qdev_fw_name(dev
),
316 return g_strdup_printf("%s@i%04x", qdev_fw_name(dev
), s
->pio
[0]);
318 return g_strdup(qdev_fw_name(dev
));
321 void sysbus_add_io(SysBusDevice
*dev
, hwaddr addr
,
324 memory_region_add_subregion(get_system_io(), addr
, mem
);
327 MemoryRegion
*sysbus_address_space(SysBusDevice
*dev
)
329 return get_system_memory();
332 static void sysbus_device_class_init(ObjectClass
*klass
, void *data
)
334 DeviceClass
*k
= DEVICE_CLASS(klass
);
335 k
->realize
= sysbus_realize
;
336 k
->bus_type
= TYPE_SYSTEM_BUS
;
338 * device_add plugs devices into a suitable bus. For "real" buses,
339 * that actually connects the device. For sysbus, the connections
340 * need to be made separately, and device_add can't do that. The
341 * device would be left unconnected, and will probably not work
343 * However, a few machines can handle device_add/-device with
344 * a few specific sysbus devices. In those cases, the device
345 * subclass needs to override it and set user_creatable=true.
347 k
->user_creatable
= false;
350 static const TypeInfo sysbus_device_type_info
= {
351 .name
= TYPE_SYS_BUS_DEVICE
,
352 .parent
= TYPE_DEVICE
,
353 .instance_size
= sizeof(SysBusDevice
),
355 .class_size
= sizeof(SysBusDeviceClass
),
356 .class_init
= sysbus_device_class_init
,
359 /* This is a nasty hack to allow passing a NULL bus to qdev_create. */
360 static BusState
*main_system_bus
;
362 static void main_system_bus_create(void)
364 /* assign main_system_bus before qbus_create_inplace()
365 * in order to make "if (bus != sysbus_get_default())" work */
366 main_system_bus
= g_malloc0(system_bus_info
.instance_size
);
367 qbus_create_inplace(main_system_bus
, system_bus_info
.instance_size
,
368 TYPE_SYSTEM_BUS
, NULL
, "main-system-bus");
369 OBJECT(main_system_bus
)->free
= g_free
;
372 BusState
*sysbus_get_default(void)
374 if (!main_system_bus
) {
375 main_system_bus_create();
377 return main_system_bus
;
380 void sysbus_init_child_obj(Object
*parent
, const char *childname
, void *child
,
381 size_t childsize
, const char *childtype
)
383 object_initialize_child(parent
, childname
, child
, childsize
, childtype
,
385 qdev_set_parent_bus(DEVICE(child
), sysbus_get_default());
388 static void sysbus_register_types(void)
390 type_register_static(&system_bus_info
);
391 type_register_static(&sysbus_device_type_info
);
394 type_init(sysbus_register_types
)