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 2.1 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 "qemu/osdep.h"
21 #include "qemu/error-report.h"
22 #include "qemu/module.h"
23 #include "qapi/error.h"
24 #include "monitor/monitor.h"
25 #include "hw/sysbus.h"
26 #include "sysemu/sysemu.h"
27 #include "hw/isa/isa.h"
28
29 static ISABus *isabus;
30
31 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
32 static char *isabus_get_fw_dev_path(DeviceState *dev);
33
isa_bus_class_init(ObjectClass * klass,void * data)34 static void isa_bus_class_init(ObjectClass *klass, void *data)
35 {
36 BusClass *k = BUS_CLASS(klass);
37
38 k->print_dev = isabus_dev_print;
39 k->get_fw_dev_path = isabus_get_fw_dev_path;
40 }
41
42 static const TypeInfo isa_dma_info = {
43 .name = TYPE_ISADMA,
44 .parent = TYPE_INTERFACE,
45 .class_size = sizeof(IsaDmaClass),
46 };
47
48 static const TypeInfo isa_bus_info = {
49 .name = TYPE_ISA_BUS,
50 .parent = TYPE_BUS,
51 .instance_size = sizeof(ISABus),
52 .class_init = isa_bus_class_init,
53 };
54
isa_bus_new(DeviceState * dev,MemoryRegion * address_space,MemoryRegion * address_space_io,Error ** errp)55 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space,
56 MemoryRegion *address_space_io, Error **errp)
57 {
58 if (isabus) {
59 error_setg(errp, "Can't create a second ISA bus");
60 return NULL;
61 }
62 if (!dev) {
63 dev = qdev_new("isabus-bridge");
64 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
65 }
66
67 isabus = ISA_BUS(qbus_new(TYPE_ISA_BUS, dev, NULL));
68 isabus->address_space = address_space;
69 isabus->address_space_io = address_space_io;
70 return isabus;
71 }
72
isa_bus_irqs(ISABus * bus,qemu_irq * irqs)73 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
74 {
75 bus->irqs = irqs;
76 }
77
78 /*
79 * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
80 *
81 * This function is only for special cases such as the 'ferr', and
82 * temporary use for normal devices until they are converted to qdev.
83 */
isa_get_irq(ISADevice * dev,unsigned isairq)84 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq)
85 {
86 assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
87 assert(isairq < ISA_NUM_IRQS);
88 return isabus->irqs[isairq];
89 }
90
isa_init_irq(ISADevice * dev,qemu_irq * p,unsigned isairq)91 void isa_init_irq(ISADevice *dev, qemu_irq *p, unsigned isairq)
92 {
93 assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
94 assert(isairq < ISA_NUM_IRQS);
95 dev->isairq[dev->nirqs] = isairq;
96 *p = isa_get_irq(dev, isairq);
97 dev->nirqs++;
98 }
99
isa_connect_gpio_out(ISADevice * isadev,int gpioirq,unsigned isairq)100 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq)
101 {
102 qemu_irq irq;
103 isa_init_irq(isadev, &irq, isairq);
104 qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq);
105 }
106
isa_bus_dma(ISABus * bus,IsaDma * dma8,IsaDma * dma16)107 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
108 {
109 assert(bus && dma8 && dma16);
110 assert(!bus->dma[0] && !bus->dma[1]);
111 bus->dma[0] = dma8;
112 bus->dma[1] = dma16;
113 }
114
isa_get_dma(ISABus * bus,int nchan)115 IsaDma *isa_get_dma(ISABus *bus, int nchan)
116 {
117 assert(bus);
118 return bus->dma[nchan > 3 ? 1 : 0];
119 }
120
isa_init_ioport(ISADevice * dev,uint16_t ioport)121 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
122 {
123 if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
124 dev->ioport_id = ioport;
125 }
126 }
127
isa_register_ioport(ISADevice * dev,MemoryRegion * io,uint16_t start)128 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
129 {
130 memory_region_add_subregion(isabus->address_space_io, start, io);
131 isa_init_ioport(dev, start);
132 }
133
isa_register_portio_list(ISADevice * dev,PortioList * piolist,uint16_t start,const MemoryRegionPortio * pio_start,void * opaque,const char * name)134 int isa_register_portio_list(ISADevice *dev,
135 PortioList *piolist, uint16_t start,
136 const MemoryRegionPortio *pio_start,
137 void *opaque, const char *name)
138 {
139 assert(piolist && !piolist->owner);
140
141 if (!isabus) {
142 return -ENODEV;
143 }
144
145 /* START is how we should treat DEV, regardless of the actual
146 contents of the portio array. This is how the old code
147 actually handled e.g. the FDC device. */
148 isa_init_ioport(dev, start);
149
150 portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
151 portio_list_add(piolist, isabus->address_space_io, start);
152
153 return 0;
154 }
155
isa_device_init(Object * obj)156 static void isa_device_init(Object *obj)
157 {
158 ISADevice *dev = ISA_DEVICE(obj);
159
160 dev->isairq[0] = -1;
161 dev->isairq[1] = -1;
162 }
163
isa_new(const char * name)164 ISADevice *isa_new(const char *name)
165 {
166 return ISA_DEVICE(qdev_new(name));
167 }
168
isa_try_new(const char * name)169 ISADevice *isa_try_new(const char *name)
170 {
171 return ISA_DEVICE(qdev_try_new(name));
172 }
173
isa_create_simple(ISABus * bus,const char * name)174 ISADevice *isa_create_simple(ISABus *bus, const char *name)
175 {
176 ISADevice *dev;
177
178 dev = isa_new(name);
179 isa_realize_and_unref(dev, bus, &error_fatal);
180 return dev;
181 }
182
isa_realize_and_unref(ISADevice * dev,ISABus * bus,Error ** errp)183 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp)
184 {
185 return qdev_realize_and_unref(&dev->parent_obj, &bus->parent_obj, errp);
186 }
187
isa_vga_init(ISABus * bus)188 ISADevice *isa_vga_init(ISABus *bus)
189 {
190 switch (vga_interface_type) {
191 case VGA_CIRRUS:
192 return isa_create_simple(bus, "isa-cirrus-vga");
193 case VGA_QXL:
194 error_report("%s: qxl: no PCI bus", __func__);
195 return NULL;
196 case VGA_STD:
197 return isa_create_simple(bus, "isa-vga");
198 case VGA_VMWARE:
199 error_report("%s: vmware_vga: no PCI bus", __func__);
200 return NULL;
201 case VGA_VIRTIO:
202 error_report("%s: virtio-vga: no PCI bus", __func__);
203 return NULL;
204 case VGA_NONE:
205 default:
206 return NULL;
207 }
208 }
209
isa_build_aml(ISABus * bus,Aml * scope)210 void isa_build_aml(ISABus *bus, Aml *scope)
211 {
212 BusChild *kid;
213 ISADevice *dev;
214 ISADeviceClass *dc;
215
216 QTAILQ_FOREACH(kid, &bus->parent_obj.children, sibling) {
217 dev = ISA_DEVICE(kid->child);
218 dc = ISA_DEVICE_GET_CLASS(dev);
219 if (dc->build_aml) {
220 dc->build_aml(dev, scope);
221 }
222 }
223 }
224
isabus_dev_print(Monitor * mon,DeviceState * dev,int indent)225 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
226 {
227 ISADevice *d = ISA_DEVICE(dev);
228
229 if (d->isairq[1] != -1) {
230 monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
231 d->isairq[0], d->isairq[1]);
232 } else if (d->isairq[0] != -1) {
233 monitor_printf(mon, "%*sisa irq %d\n", indent, "",
234 d->isairq[0]);
235 }
236 }
237
isabus_bridge_class_init(ObjectClass * klass,void * data)238 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
239 {
240 DeviceClass *dc = DEVICE_CLASS(klass);
241
242 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
243 dc->fw_name = "isa";
244 }
245
246 static const TypeInfo isabus_bridge_info = {
247 .name = "isabus-bridge",
248 .parent = TYPE_SYS_BUS_DEVICE,
249 .instance_size = sizeof(SysBusDevice),
250 .class_init = isabus_bridge_class_init,
251 };
252
isa_device_class_init(ObjectClass * klass,void * data)253 static void isa_device_class_init(ObjectClass *klass, void *data)
254 {
255 DeviceClass *k = DEVICE_CLASS(klass);
256 k->bus_type = TYPE_ISA_BUS;
257 }
258
259 static const TypeInfo isa_device_type_info = {
260 .name = TYPE_ISA_DEVICE,
261 .parent = TYPE_DEVICE,
262 .instance_size = sizeof(ISADevice),
263 .instance_init = isa_device_init,
264 .abstract = true,
265 .class_size = sizeof(ISADeviceClass),
266 .class_init = isa_device_class_init,
267 };
268
isabus_register_types(void)269 static void isabus_register_types(void)
270 {
271 type_register_static(&isa_dma_info);
272 type_register_static(&isa_bus_info);
273 type_register_static(&isabus_bridge_info);
274 type_register_static(&isa_device_type_info);
275 }
276
isabus_get_fw_dev_path(DeviceState * dev)277 static char *isabus_get_fw_dev_path(DeviceState *dev)
278 {
279 ISADevice *d = ISA_DEVICE(dev);
280 char path[40];
281 int off;
282
283 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
284 if (d->ioport_id) {
285 snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
286 }
287
288 return g_strdup(path);
289 }
290
isa_address_space(ISADevice * dev)291 MemoryRegion *isa_address_space(ISADevice *dev)
292 {
293 if (dev) {
294 return isa_bus_from_device(dev)->address_space;
295 }
296
297 return isabus->address_space;
298 }
299
isa_address_space_io(ISADevice * dev)300 MemoryRegion *isa_address_space_io(ISADevice *dev)
301 {
302 if (dev) {
303 return isa_bus_from_device(dev)->address_space_io;
304 }
305
306 return isabus->address_space_io;
307 }
308
309 type_init(isabus_register_types)
310