2 * isa bus support for qdev.
4 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
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.
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 "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"
28 static ISABus *isabus;
30 static char *isabus_get_fw_dev_path(DeviceState *dev);
32 static void isa_bus_class_init(ObjectClass *klass, void *data)
34 BusClass *k = BUS_CLASS(klass);
36 k->get_fw_dev_path = isabus_get_fw_dev_path;
39 static const TypeInfo isa_dma_info = {
41 .parent = TYPE_INTERFACE,
42 .class_size = sizeof(IsaDmaClass),
45 static const TypeInfo isa_bus_info = {
48 .instance_size = sizeof(ISABus),
49 .class_init = isa_bus_class_init,
52 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space,
53 MemoryRegion *address_space_io, Error **errp)
56 error_setg(errp, "Can't create a second ISA bus");
60 dev = qdev_new("isabus-bridge");
61 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
64 isabus = ISA_BUS(qbus_new(TYPE_ISA_BUS, dev, NULL));
65 isabus->address_space = address_space;
66 isabus->address_space_io = address_space_io;
70 void isa_bus_register_input_irqs(ISABus *bus, qemu_irq *irqs_in)
72 bus->irqs_in = irqs_in;
75 qemu_irq isa_bus_get_irq(ISABus *bus, unsigned irqnum)
77 assert(irqnum < ISA_NUM_IRQS);
79 return bus->irqs_in[irqnum];
83 * isa_get_irq() returns the corresponding input qemu_irq entry for the i8259.
85 * This function is only for special cases such as the 'ferr', and
86 * temporary use for normal devices until they are converted to qdev.
88 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq)
90 assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
91 return isa_bus_get_irq(isabus, isairq);
94 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq)
96 qemu_irq input_irq = isa_get_irq(isadev, isairq);
97 qdev_connect_gpio_out(DEVICE(isadev), gpioirq, input_irq);
100 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
102 assert(bus && dma8 && dma16);
103 assert(!bus->dma[0] && !bus->dma[1]);
108 IsaDma *isa_bus_get_dma(ISABus *bus, int nchan)
111 return bus->dma[nchan > 3 ? 1 : 0];
114 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
116 if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
117 dev->ioport_id = ioport;
121 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
123 memory_region_add_subregion(isa_address_space_io(dev), start, io);
124 isa_init_ioport(dev, start);
127 int isa_register_portio_list(ISADevice *dev,
128 PortioList *piolist, uint16_t start,
129 const MemoryRegionPortio *pio_start,
130 void *opaque, const char *name)
132 assert(piolist && !piolist->owner);
138 /* START is how we should treat DEV, regardless of the actual
139 contents of the portio array. This is how the old code
140 actually handled e.g. the FDC device. */
141 isa_init_ioport(dev, start);
143 portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
144 portio_list_add(piolist, isa_address_space_io(dev), start);
149 ISADevice *isa_new(const char *name)
151 return ISA_DEVICE(qdev_new(name));
154 ISADevice *isa_try_new(const char *name)
156 return ISA_DEVICE(qdev_try_new(name));
159 ISADevice *isa_create_simple(ISABus *bus, const char *name)
164 isa_realize_and_unref(dev, bus, &error_fatal);
168 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp)
170 return qdev_realize_and_unref(&dev->parent_obj, &bus->parent_obj, errp);
173 ISABus *isa_bus_from_device(ISADevice *dev)
175 return ISA_BUS(qdev_get_parent_bus(DEVICE(dev)));
178 ISADevice *isa_vga_init(ISABus *bus)
180 vga_interface_created = true;
181 switch (vga_interface_type) {
183 return isa_create_simple(bus, "isa-cirrus-vga");
185 error_report("%s: qxl: no PCI bus", __func__);
188 return isa_create_simple(bus, "isa-vga");
190 error_report("%s: vmware_vga: no PCI bus", __func__);
193 error_report("%s: virtio-vga: no PCI bus", __func__);
201 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
203 DeviceClass *dc = DEVICE_CLASS(klass);
205 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
209 static const TypeInfo isabus_bridge_info = {
210 .name = "isabus-bridge",
211 .parent = TYPE_SYS_BUS_DEVICE,
212 .instance_size = sizeof(SysBusDevice),
213 .class_init = isabus_bridge_class_init,
216 static void isa_device_class_init(ObjectClass *klass, void *data)
218 DeviceClass *k = DEVICE_CLASS(klass);
219 k->bus_type = TYPE_ISA_BUS;
222 static const TypeInfo isa_device_type_info = {
223 .name = TYPE_ISA_DEVICE,
224 .parent = TYPE_DEVICE,
225 .instance_size = sizeof(ISADevice),
227 .class_init = isa_device_class_init,
230 static void isabus_register_types(void)
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);
238 static char *isabus_get_fw_dev_path(DeviceState *dev)
240 ISADevice *d = ISA_DEVICE(dev);
244 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
246 snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
249 return g_strdup(path);
252 MemoryRegion *isa_address_space(ISADevice *dev)
255 return isa_bus_from_device(dev)->address_space;
258 return isabus->address_space;
261 MemoryRegion *isa_address_space_io(ISADevice *dev)
264 return isa_bus_from_device(dev)->address_space_io;
267 return isabus->address_space_io;
270 type_init(isabus_register_types)