Merge tag 'pull-hex-20221003' of https://github.com/quic/qemu into staging
[qemu.git] / hw / isa / isa-bus.c
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 "hw/sysbus.h"
25 #include "sysemu/sysemu.h"
26 #include "hw/isa/isa.h"
27 #include "hw/acpi/acpi_aml_interface.h"
28
29 static ISABus *isabus;
30
31 static char *isabus_get_fw_dev_path(DeviceState *dev);
32
33 static void isa_bus_class_init(ObjectClass *klass, void *data)
34 {
35 BusClass *k = BUS_CLASS(klass);
36
37 k->get_fw_dev_path = isabus_get_fw_dev_path;
38 }
39
40 static const TypeInfo isa_dma_info = {
41 .name = TYPE_ISADMA,
42 .parent = TYPE_INTERFACE,
43 .class_size = sizeof(IsaDmaClass),
44 };
45
46 static const TypeInfo isa_bus_info = {
47 .name = TYPE_ISA_BUS,
48 .parent = TYPE_BUS,
49 .instance_size = sizeof(ISABus),
50 .class_init = isa_bus_class_init,
51 };
52
53 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space,
54 MemoryRegion *address_space_io, Error **errp)
55 {
56 if (isabus) {
57 error_setg(errp, "Can't create a second ISA bus");
58 return NULL;
59 }
60 if (!dev) {
61 dev = qdev_new("isabus-bridge");
62 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
63 }
64
65 isabus = ISA_BUS(qbus_new(TYPE_ISA_BUS, dev, NULL));
66 isabus->address_space = address_space;
67 isabus->address_space_io = address_space_io;
68 return isabus;
69 }
70
71 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
72 {
73 bus->irqs = irqs;
74 }
75
76 /*
77 * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
78 *
79 * This function is only for special cases such as the 'ferr', and
80 * temporary use for normal devices until they are converted to qdev.
81 */
82 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq)
83 {
84 assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
85 assert(isairq < ISA_NUM_IRQS);
86 return isabus->irqs[isairq];
87 }
88
89 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq)
90 {
91 qemu_irq irq = isa_get_irq(isadev, isairq);
92 qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq);
93 }
94
95 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
96 {
97 assert(bus && dma8 && dma16);
98 assert(!bus->dma[0] && !bus->dma[1]);
99 bus->dma[0] = dma8;
100 bus->dma[1] = dma16;
101 }
102
103 IsaDma *isa_get_dma(ISABus *bus, int nchan)
104 {
105 assert(bus);
106 return bus->dma[nchan > 3 ? 1 : 0];
107 }
108
109 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
110 {
111 if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
112 dev->ioport_id = ioport;
113 }
114 }
115
116 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
117 {
118 memory_region_add_subregion(isabus->address_space_io, start, io);
119 isa_init_ioport(dev, start);
120 }
121
122 int isa_register_portio_list(ISADevice *dev,
123 PortioList *piolist, uint16_t start,
124 const MemoryRegionPortio *pio_start,
125 void *opaque, const char *name)
126 {
127 assert(piolist && !piolist->owner);
128
129 if (!isabus) {
130 return -ENODEV;
131 }
132
133 /* START is how we should treat DEV, regardless of the actual
134 contents of the portio array. This is how the old code
135 actually handled e.g. the FDC device. */
136 isa_init_ioport(dev, start);
137
138 portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
139 portio_list_add(piolist, isabus->address_space_io, start);
140
141 return 0;
142 }
143
144 ISADevice *isa_new(const char *name)
145 {
146 return ISA_DEVICE(qdev_new(name));
147 }
148
149 ISADevice *isa_try_new(const char *name)
150 {
151 return ISA_DEVICE(qdev_try_new(name));
152 }
153
154 ISADevice *isa_create_simple(ISABus *bus, const char *name)
155 {
156 ISADevice *dev;
157
158 dev = isa_new(name);
159 isa_realize_and_unref(dev, bus, &error_fatal);
160 return dev;
161 }
162
163 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp)
164 {
165 return qdev_realize_and_unref(&dev->parent_obj, &bus->parent_obj, errp);
166 }
167
168 ISADevice *isa_vga_init(ISABus *bus)
169 {
170 vga_interface_created = true;
171 switch (vga_interface_type) {
172 case VGA_CIRRUS:
173 return isa_create_simple(bus, "isa-cirrus-vga");
174 case VGA_QXL:
175 error_report("%s: qxl: no PCI bus", __func__);
176 return NULL;
177 case VGA_STD:
178 return isa_create_simple(bus, "isa-vga");
179 case VGA_VMWARE:
180 error_report("%s: vmware_vga: no PCI bus", __func__);
181 return NULL;
182 case VGA_VIRTIO:
183 error_report("%s: virtio-vga: no PCI bus", __func__);
184 return NULL;
185 case VGA_NONE:
186 default:
187 return NULL;
188 }
189 }
190
191 void isa_build_aml(ISABus *bus, Aml *scope)
192 {
193 BusChild *kid;
194
195 QTAILQ_FOREACH(kid, &bus->parent_obj.children, sibling) {
196 call_dev_aml_func(DEVICE(kid->child), scope);
197 }
198 }
199
200 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
201 {
202 DeviceClass *dc = DEVICE_CLASS(klass);
203
204 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
205 dc->fw_name = "isa";
206 }
207
208 static const TypeInfo isabus_bridge_info = {
209 .name = "isabus-bridge",
210 .parent = TYPE_SYS_BUS_DEVICE,
211 .instance_size = sizeof(SysBusDevice),
212 .class_init = isabus_bridge_class_init,
213 };
214
215 static void isa_device_class_init(ObjectClass *klass, void *data)
216 {
217 DeviceClass *k = DEVICE_CLASS(klass);
218 k->bus_type = TYPE_ISA_BUS;
219 }
220
221 static const TypeInfo isa_device_type_info = {
222 .name = TYPE_ISA_DEVICE,
223 .parent = TYPE_DEVICE,
224 .instance_size = sizeof(ISADevice),
225 .abstract = true,
226 .class_size = sizeof(ISADeviceClass),
227 .class_init = isa_device_class_init,
228 };
229
230 static void isabus_register_types(void)
231 {
232 type_register_static(&isa_dma_info);
233 type_register_static(&isa_bus_info);
234 type_register_static(&isabus_bridge_info);
235 type_register_static(&isa_device_type_info);
236 }
237
238 static char *isabus_get_fw_dev_path(DeviceState *dev)
239 {
240 ISADevice *d = ISA_DEVICE(dev);
241 char path[40];
242 int off;
243
244 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
245 if (d->ioport_id) {
246 snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
247 }
248
249 return g_strdup(path);
250 }
251
252 MemoryRegion *isa_address_space(ISADevice *dev)
253 {
254 if (dev) {
255 return isa_bus_from_device(dev)->address_space;
256 }
257
258 return isabus->address_space;
259 }
260
261 MemoryRegion *isa_address_space_io(ISADevice *dev)
262 {
263 if (dev) {
264 return isa_bus_from_device(dev)->address_space_io;
265 }
266
267 return isabus->address_space_io;
268 }
269
270 type_init(isabus_register_types)