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#include "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "qapi/error.h"
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#include "sysemu/sysemu.h"
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#include "hw/isa/isa.h"
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static char *isabus_get_fw_dev_path(DeviceState *dev);
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static void isa_bus_class_init(ObjectClass *klass, void *data)
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BusClass *k = BUS_CLASS(klass);
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k->get_fw_dev_path = isabus_get_fw_dev_path;
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static const TypeInfo isa_dma_info = {
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.parent = TYPE_INTERFACE,
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.class_size = sizeof(IsaDmaClass),
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static const TypeInfo isa_bus_info = {
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.instance_size = sizeof(ISABus),
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.class_init = isa_bus_class_init,
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ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space,
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MemoryRegion *address_space_io, Error **errp)
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DeviceState *bridge = NULL;
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error_setg(errp, "Can't create a second ISA bus");
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bridge = qdev_new("isabus-bridge");
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isabus = ISA_BUS(qbus_new(TYPE_ISA_BUS, dev, NULL));
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isabus->address_space = address_space;
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isabus->address_space_io = address_space_io;
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sysbus_realize_and_unref(SYS_BUS_DEVICE(bridge), &error_fatal);
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void isa_bus_register_input_irqs(ISABus *bus, qemu_irq *irqs_in)
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bus->irqs_in = irqs_in;
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qemu_irq isa_bus_get_irq(ISABus *bus, unsigned irqnum)
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assert(irqnum < ISA_NUM_IRQS);
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return bus->irqs_in[irqnum];
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qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq)
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assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
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return isa_bus_get_irq(isabus, isairq);
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void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq)
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qemu_irq input_irq = isa_get_irq(isadev, isairq);
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qdev_connect_gpio_out(DEVICE(isadev), gpioirq, input_irq);
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void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
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assert(bus && dma8 && dma16);
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assert(!bus->dma[0] && !bus->dma[1]);
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IsaDma *isa_bus_get_dma(ISABus *bus, int nchan)
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return bus->dma[nchan > 3 ? 1 : 0];
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static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
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if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
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dev->ioport_id = ioport;
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void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
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memory_region_add_subregion(isa_address_space_io(dev), start, io);
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isa_init_ioport(dev, start);
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int isa_register_portio_list(ISADevice *dev,
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PortioList *piolist, uint16_t start,
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const MemoryRegionPortio *pio_start,
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void *opaque, const char *name)
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assert(piolist && !piolist->owner);
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isa_init_ioport(dev, start);
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portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
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portio_list_add(piolist, isa_address_space_io(dev), start);
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ISADevice *isa_new(const char *name)
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return ISA_DEVICE(qdev_new(name));
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ISADevice *isa_try_new(const char *name)
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return ISA_DEVICE(qdev_try_new(name));
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ISADevice *isa_create_simple(ISABus *bus, const char *name)
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isa_realize_and_unref(dev, bus, &error_fatal);
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bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp)
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return qdev_realize_and_unref(&dev->parent_obj, &bus->parent_obj, errp);
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ISABus *isa_bus_from_device(ISADevice *dev)
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return ISA_BUS(qdev_get_parent_bus(DEVICE(dev)));
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ISADevice *isa_vga_init(ISABus *bus)
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vga_interface_created = true;
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switch (vga_interface_type) {
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return isa_create_simple(bus, "isa-cirrus-vga");
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error_report("%s: qxl: no PCI bus", __func__);
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return isa_create_simple(bus, "isa-vga");
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error_report("%s: vmware_vga: no PCI bus", __func__);
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error_report("%s: virtio-vga: no PCI bus", __func__);
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static void isabus_bridge_class_init(ObjectClass *klass, void *data)
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DeviceClass *dc = DEVICE_CLASS(klass);
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set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
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static const TypeInfo isabus_bridge_info = {
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.name = "isabus-bridge",
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(SysBusDevice),
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.class_init = isabus_bridge_class_init,
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static void isa_device_class_init(ObjectClass *klass, void *data)
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DeviceClass *k = DEVICE_CLASS(klass);
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k->bus_type = TYPE_ISA_BUS;
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static const TypeInfo isa_device_type_info = {
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.name = TYPE_ISA_DEVICE,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(ISADevice),
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.class_init = isa_device_class_init,
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static void isabus_register_types(void)
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type_register_static(&isa_dma_info);
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type_register_static(&isa_bus_info);
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type_register_static(&isabus_bridge_info);
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type_register_static(&isa_device_type_info);
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static char *isabus_get_fw_dev_path(DeviceState *dev)
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ISADevice *d = ISA_DEVICE(dev);
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off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
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snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
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return g_strdup(path);
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MemoryRegion *isa_address_space(ISADevice *dev)
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return isa_bus_from_device(dev)->address_space;
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return isabus->address_space;
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MemoryRegion *isa_address_space_io(ISADevice *dev)
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return isa_bus_from_device(dev)->address_space_io;
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return isabus->address_space_io;
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type_init(isabus_register_types)