diff options
Diffstat (limited to 'hw/isa/isa-bus.c')
| -rw-r--r-- | hw/isa/isa-bus.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c new file mode 100644 index 00000000..1bee1a47 --- /dev/null +++ b/hw/isa/isa-bus.c @@ -0,0 +1,270 @@ +/* + * isa bus support for qdev. + * + * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "qemu/module.h" +#include "qapi/error.h" +#include "hw/sysbus.h" +#include "sysemu/sysemu.h" +#include "hw/isa/isa.h" +#include "hw/acpi/acpi_aml_interface.h" + +static ISABus *isabus; + +static char *isabus_get_fw_dev_path(DeviceState *dev); + +static void isa_bus_class_init(ObjectClass *klass, void *data) +{ + BusClass *k = BUS_CLASS(klass); + + k->get_fw_dev_path = isabus_get_fw_dev_path; +} + +static const TypeInfo isa_dma_info = { + .name = TYPE_ISADMA, + .parent = TYPE_INTERFACE, + .class_size = sizeof(IsaDmaClass), +}; + +static const TypeInfo isa_bus_info = { + .name = TYPE_ISA_BUS, + .parent = TYPE_BUS, + .instance_size = sizeof(ISABus), + .class_init = isa_bus_class_init, +}; + +ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space, + MemoryRegion *address_space_io, Error **errp) +{ + if (isabus) { + error_setg(errp, "Can't create a second ISA bus"); + return NULL; + } + if (!dev) { + dev = qdev_new("isabus-bridge"); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + } + + isabus = ISA_BUS(qbus_new(TYPE_ISA_BUS, dev, NULL)); + isabus->address_space = address_space; + isabus->address_space_io = address_space_io; + return isabus; +} + +void isa_bus_irqs(ISABus *bus, qemu_irq *irqs) +{ + bus->irqs = irqs; +} + +/* + * isa_get_irq() returns the corresponding qemu_irq entry for the i8259. + * + * This function is only for special cases such as the 'ferr', and + * temporary use for normal devices until they are converted to qdev. + */ +qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq) +{ + assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus); + assert(isairq < ISA_NUM_IRQS); + return isabus->irqs[isairq]; +} + +void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq) +{ + qemu_irq irq = isa_get_irq(isadev, isairq); + qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq); +} + +void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16) +{ + assert(bus && dma8 && dma16); + assert(!bus->dma[0] && !bus->dma[1]); + bus->dma[0] = dma8; + bus->dma[1] = dma16; +} + +IsaDma *isa_get_dma(ISABus *bus, int nchan) +{ + assert(bus); + return bus->dma[nchan > 3 ? 1 : 0]; +} + +static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport) +{ + if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) { + dev->ioport_id = ioport; + } +} + +void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start) +{ + memory_region_add_subregion(isabus->address_space_io, start, io); + isa_init_ioport(dev, start); +} + +int isa_register_portio_list(ISADevice *dev, + PortioList *piolist, uint16_t start, + const MemoryRegionPortio *pio_start, + void *opaque, const char *name) +{ + assert(piolist && !piolist->owner); + + if (!isabus) { + return -ENODEV; + } + + /* START is how we should treat DEV, regardless of the actual + contents of the portio array. This is how the old code + actually handled e.g. the FDC device. */ + isa_init_ioport(dev, start); + + portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name); + portio_list_add(piolist, isabus->address_space_io, start); + + return 0; +} + +ISADevice *isa_new(const char *name) +{ + return ISA_DEVICE(qdev_new(name)); +} + +ISADevice *isa_try_new(const char *name) +{ + return ISA_DEVICE(qdev_try_new(name)); +} + +ISADevice *isa_create_simple(ISABus *bus, const char *name) +{ + ISADevice *dev; + + dev = isa_new(name); + isa_realize_and_unref(dev, bus, &error_fatal); + return dev; +} + +bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp) +{ + return qdev_realize_and_unref(&dev->parent_obj, &bus->parent_obj, errp); +} + +ISADevice *isa_vga_init(ISABus *bus) +{ + vga_interface_created = true; + switch (vga_interface_type) { + case VGA_CIRRUS: + return isa_create_simple(bus, "isa-cirrus-vga"); + case VGA_QXL: + error_report("%s: qxl: no PCI bus", __func__); + return NULL; + case VGA_STD: + return isa_create_simple(bus, "isa-vga"); + case VGA_VMWARE: + error_report("%s: vmware_vga: no PCI bus", __func__); + return NULL; + case VGA_VIRTIO: + error_report("%s: virtio-vga: no PCI bus", __func__); + return NULL; + case VGA_NONE: + default: + return NULL; + } +} + +void isa_build_aml(ISABus *bus, Aml *scope) +{ + BusChild *kid; + + QTAILQ_FOREACH(kid, &bus->parent_obj.children, sibling) { + call_dev_aml_func(DEVICE(kid->child), scope); + } +} + +static void isabus_bridge_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); + dc->fw_name = "isa"; +} + +static const TypeInfo isabus_bridge_info = { + .name = "isabus-bridge", + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(SysBusDevice), + .class_init = isabus_bridge_class_init, +}; + +static void isa_device_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *k = DEVICE_CLASS(klass); + k->bus_type = TYPE_ISA_BUS; +} + +static const TypeInfo isa_device_type_info = { + .name = TYPE_ISA_DEVICE, + .parent = TYPE_DEVICE, + .instance_size = sizeof(ISADevice), + .abstract = true, + .class_size = sizeof(ISADeviceClass), + .class_init = isa_device_class_init, +}; + +static void isabus_register_types(void) +{ + type_register_static(&isa_dma_info); + type_register_static(&isa_bus_info); + type_register_static(&isabus_bridge_info); + type_register_static(&isa_device_type_info); +} + +static char *isabus_get_fw_dev_path(DeviceState *dev) +{ + ISADevice *d = ISA_DEVICE(dev); + char path[40]; + int off; + + off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev)); + if (d->ioport_id) { + snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id); + } + + return g_strdup(path); +} + +MemoryRegion *isa_address_space(ISADevice *dev) +{ + if (dev) { + return isa_bus_from_device(dev)->address_space; + } + + return isabus->address_space; +} + +MemoryRegion *isa_address_space_io(ISADevice *dev) +{ + if (dev) { + return isa_bus_from_device(dev)->address_space_io; + } + + return isabus->address_space_io; +} + +type_init(isabus_register_types) |