root / hw / isa-bus.c @ 9bfa659e
History | View | Annotate | Download (6.5 kB)
1 |
/*
|
---|---|
2 |
* isa bus support for qdev.
|
3 |
*
|
4 |
* Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
|
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 |
#include "hw.h" |
20 |
#include "monitor.h" |
21 |
#include "sysbus.h" |
22 |
#include "isa.h" |
23 |
#include "exec-memory.h" |
24 |
|
25 |
static ISABus *isabus;
|
26 |
target_phys_addr_t isa_mem_base = 0;
|
27 |
|
28 |
static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent); |
29 |
static char *isabus_get_fw_dev_path(DeviceState *dev); |
30 |
|
31 |
static void isa_bus_class_init(ObjectClass *klass, void *data) |
32 |
{ |
33 |
BusClass *k = BUS_CLASS(klass); |
34 |
|
35 |
k->print_dev = isabus_dev_print; |
36 |
k->get_fw_dev_path = isabus_get_fw_dev_path; |
37 |
} |
38 |
|
39 |
static const TypeInfo isa_bus_info = { |
40 |
.name = TYPE_ISA_BUS, |
41 |
.parent = TYPE_BUS, |
42 |
.instance_size = sizeof(ISABus),
|
43 |
.class_init = isa_bus_class_init, |
44 |
}; |
45 |
|
46 |
ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io) |
47 |
{ |
48 |
if (isabus) {
|
49 |
fprintf(stderr, "Can't create a second ISA bus\n");
|
50 |
return NULL; |
51 |
} |
52 |
if (NULL == dev) { |
53 |
dev = qdev_create(NULL, "isabus-bridge"); |
54 |
qdev_init_nofail(dev); |
55 |
} |
56 |
|
57 |
isabus = FROM_QBUS(ISABus, qbus_create(TYPE_ISA_BUS, dev, NULL));
|
58 |
isabus->address_space_io = address_space_io; |
59 |
return isabus;
|
60 |
} |
61 |
|
62 |
void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
|
63 |
{ |
64 |
if (!bus) {
|
65 |
hw_error("Can't set isa irqs with no isa bus present.");
|
66 |
} |
67 |
bus->irqs = irqs; |
68 |
} |
69 |
|
70 |
/*
|
71 |
* isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
|
72 |
*
|
73 |
* This function is only for special cases such as the 'ferr', and
|
74 |
* temporary use for normal devices until they are converted to qdev.
|
75 |
*/
|
76 |
qemu_irq isa_get_irq(ISADevice *dev, int isairq)
|
77 |
{ |
78 |
assert(!dev || DO_UPCAST(ISABus, qbus, dev->qdev.parent_bus) == isabus); |
79 |
if (isairq < 0 || isairq > 15) { |
80 |
hw_error("isa irq %d invalid", isairq);
|
81 |
} |
82 |
return isabus->irqs[isairq];
|
83 |
} |
84 |
|
85 |
void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq) |
86 |
{ |
87 |
assert(dev->nirqs < ARRAY_SIZE(dev->isairq)); |
88 |
dev->isairq[dev->nirqs] = isairq; |
89 |
*p = isa_get_irq(dev, isairq); |
90 |
dev->nirqs++; |
91 |
} |
92 |
|
93 |
static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport) |
94 |
{ |
95 |
if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) { |
96 |
dev->ioport_id = ioport; |
97 |
} |
98 |
} |
99 |
|
100 |
void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
|
101 |
{ |
102 |
memory_region_add_subregion(isabus->address_space_io, start, io); |
103 |
isa_init_ioport(dev, start); |
104 |
} |
105 |
|
106 |
void isa_register_portio_list(ISADevice *dev, uint16_t start,
|
107 |
const MemoryRegionPortio *pio_start,
|
108 |
void *opaque, const char *name) |
109 |
{ |
110 |
PortioList *piolist = g_new(PortioList, 1);
|
111 |
|
112 |
/* START is how we should treat DEV, regardless of the actual
|
113 |
contents of the portio array. This is how the old code
|
114 |
actually handled e.g. the FDC device. */
|
115 |
isa_init_ioport(dev, start); |
116 |
|
117 |
portio_list_init(piolist, pio_start, opaque, name); |
118 |
portio_list_add(piolist, isabus->address_space_io, start); |
119 |
} |
120 |
|
121 |
static int isa_qdev_init(DeviceState *qdev) |
122 |
{ |
123 |
ISADevice *dev = ISA_DEVICE(qdev); |
124 |
ISADeviceClass *klass = ISA_DEVICE_GET_CLASS(dev); |
125 |
|
126 |
dev->isairq[0] = -1; |
127 |
dev->isairq[1] = -1; |
128 |
|
129 |
if (klass->init) {
|
130 |
return klass->init(dev);
|
131 |
} |
132 |
|
133 |
return 0; |
134 |
} |
135 |
|
136 |
ISADevice *isa_create(ISABus *bus, const char *name) |
137 |
{ |
138 |
DeviceState *dev; |
139 |
|
140 |
if (!bus) {
|
141 |
hw_error("Tried to create isa device %s with no isa bus present.",
|
142 |
name); |
143 |
} |
144 |
dev = qdev_create(&bus->qbus, name); |
145 |
return ISA_DEVICE(dev);
|
146 |
} |
147 |
|
148 |
ISADevice *isa_try_create(ISABus *bus, const char *name) |
149 |
{ |
150 |
DeviceState *dev; |
151 |
|
152 |
if (!bus) {
|
153 |
hw_error("Tried to create isa device %s with no isa bus present.",
|
154 |
name); |
155 |
} |
156 |
dev = qdev_try_create(&bus->qbus, name); |
157 |
return ISA_DEVICE(dev);
|
158 |
} |
159 |
|
160 |
ISADevice *isa_create_simple(ISABus *bus, const char *name) |
161 |
{ |
162 |
ISADevice *dev; |
163 |
|
164 |
dev = isa_create(bus, name); |
165 |
qdev_init_nofail(&dev->qdev); |
166 |
return dev;
|
167 |
} |
168 |
|
169 |
static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent) |
170 |
{ |
171 |
ISADevice *d = ISA_DEVICE(dev); |
172 |
|
173 |
if (d->isairq[1] != -1) { |
174 |
monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "", |
175 |
d->isairq[0], d->isairq[1]); |
176 |
} else if (d->isairq[0] != -1) { |
177 |
monitor_printf(mon, "%*sisa irq %d\n", indent, "", |
178 |
d->isairq[0]);
|
179 |
} |
180 |
} |
181 |
|
182 |
static int isabus_bridge_init(SysBusDevice *dev) |
183 |
{ |
184 |
/* nothing */
|
185 |
return 0; |
186 |
} |
187 |
|
188 |
static void isabus_bridge_class_init(ObjectClass *klass, void *data) |
189 |
{ |
190 |
DeviceClass *dc = DEVICE_CLASS(klass); |
191 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
192 |
|
193 |
k->init = isabus_bridge_init; |
194 |
dc->fw_name = "isa";
|
195 |
dc->no_user = 1;
|
196 |
} |
197 |
|
198 |
static TypeInfo isabus_bridge_info = {
|
199 |
.name = "isabus-bridge",
|
200 |
.parent = TYPE_SYS_BUS_DEVICE, |
201 |
.instance_size = sizeof(SysBusDevice),
|
202 |
.class_init = isabus_bridge_class_init, |
203 |
}; |
204 |
|
205 |
static void isa_device_class_init(ObjectClass *klass, void *data) |
206 |
{ |
207 |
DeviceClass *k = DEVICE_CLASS(klass); |
208 |
k->init = isa_qdev_init; |
209 |
k->bus_type = TYPE_ISA_BUS; |
210 |
} |
211 |
|
212 |
static TypeInfo isa_device_type_info = {
|
213 |
.name = TYPE_ISA_DEVICE, |
214 |
.parent = TYPE_DEVICE, |
215 |
.instance_size = sizeof(ISADevice),
|
216 |
.abstract = true,
|
217 |
.class_size = sizeof(ISADeviceClass),
|
218 |
.class_init = isa_device_class_init, |
219 |
}; |
220 |
|
221 |
static void isabus_register_types(void) |
222 |
{ |
223 |
type_register_static(&isa_bus_info); |
224 |
type_register_static(&isabus_bridge_info); |
225 |
type_register_static(&isa_device_type_info); |
226 |
} |
227 |
|
228 |
static char *isabus_get_fw_dev_path(DeviceState *dev) |
229 |
{ |
230 |
ISADevice *d = (ISADevice*)dev; |
231 |
char path[40]; |
232 |
int off;
|
233 |
|
234 |
off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev)); |
235 |
if (d->ioport_id) {
|
236 |
snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id); |
237 |
} |
238 |
|
239 |
return strdup(path);
|
240 |
} |
241 |
|
242 |
MemoryRegion *isa_address_space(ISADevice *dev) |
243 |
{ |
244 |
return get_system_memory();
|
245 |
} |
246 |
|
247 |
type_init(isabus_register_types) |