diff options
Diffstat (limited to 'qemu/hw/isa/isa-bus.c')
| -rw-r--r-- | qemu/hw/isa/isa-bus.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/qemu/hw/isa/isa-bus.c b/qemu/hw/isa/isa-bus.c new file mode 100644 index 000000000..43e0cd8dd --- /dev/null +++ b/qemu/hw/isa/isa-bus.c @@ -0,0 +1,298 @@ +/* + * 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 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 "hw/hw.h" +#include "monitor/monitor.h" +#include "hw/sysbus.h" +#include "sysemu/sysemu.h" +#include "hw/isa/isa.h" +#include "hw/i386/pc.h" + +static ISABus *isabus; + +static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent); +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->print_dev = isabus_dev_print; + k->get_fw_dev_path = isabus_get_fw_dev_path; +} + +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) +{ + if (isabus) { + fprintf(stderr, "Can't create a second ISA bus\n"); + return NULL; + } + if (!dev) { + dev = qdev_create(NULL, "isabus-bridge"); + qdev_init_nofail(dev); + } + + isabus = ISA_BUS(qbus_create(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) +{ + if (!bus) { + hw_error("Can't set isa irqs with no isa bus present."); + } + 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, int isairq) +{ + assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus); + if (isairq < 0 || isairq > 15) { + hw_error("isa irq %d invalid", isairq); + } + return isabus->irqs[isairq]; +} + +void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq) +{ + assert(dev->nirqs < ARRAY_SIZE(dev->isairq)); + dev->isairq[dev->nirqs] = isairq; + *p = isa_get_irq(dev, isairq); + dev->nirqs++; +} + +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); +} + +void isa_register_portio_list(ISADevice *dev, uint16_t start, + const MemoryRegionPortio *pio_start, + void *opaque, const char *name) +{ + PortioList piolist; + + /* 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); + + /* FIXME: the device should store created PortioList in its state. Note + that DEV can be NULL here and that single device can register several + portio lists. Current implementation is leaking memory allocated + in portio_list_init. The leak is not critical because it happens only + at initialization time. */ + portio_list_init(&piolist, OBJECT(dev), pio_start, opaque, name); + portio_list_add(&piolist, isabus->address_space_io, start); +} + +static void isa_device_init(Object *obj) +{ + ISADevice *dev = ISA_DEVICE(obj); + + dev->isairq[0] = -1; + dev->isairq[1] = -1; +} + +ISADevice *isa_create(ISABus *bus, const char *name) +{ + DeviceState *dev; + + if (!bus) { + hw_error("Tried to create isa device %s with no isa bus present.", + name); + } + dev = qdev_create(BUS(bus), name); + return ISA_DEVICE(dev); +} + +ISADevice *isa_try_create(ISABus *bus, const char *name) +{ + DeviceState *dev; + + if (!bus) { + hw_error("Tried to create isa device %s with no isa bus present.", + name); + } + dev = qdev_try_create(BUS(bus), name); + return ISA_DEVICE(dev); +} + +ISADevice *isa_create_simple(ISABus *bus, const char *name) +{ + ISADevice *dev; + + dev = isa_create(bus, name); + qdev_init_nofail(DEVICE(dev)); + return dev; +} + +ISADevice *isa_vga_init(ISABus *bus) +{ + switch (vga_interface_type) { + case VGA_CIRRUS: + return isa_create_simple(bus, "isa-cirrus-vga"); + case VGA_QXL: + fprintf(stderr, "%s: qxl: no PCI bus\n", __func__); + return NULL; + case VGA_STD: + return isa_create_simple(bus, "isa-vga"); + case VGA_VMWARE: + fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __func__); + return NULL; + case VGA_VIRTIO: + fprintf(stderr, "%s: virtio-vga: no PCI bus\n", __func__); + return NULL; + case VGA_NONE: + default: + return NULL; + } +} + +static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent) +{ + ISADevice *d = ISA_DEVICE(dev); + + if (d->isairq[1] != -1) { + monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "", + d->isairq[0], d->isairq[1]); + } else if (d->isairq[0] != -1) { + monitor_printf(mon, "%*sisa irq %d\n", indent, "", + d->isairq[0]); + } +} + +static void isabus_bridge_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + 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), + .instance_init = isa_device_init, + .abstract = true, + .class_size = sizeof(ISADeviceClass), + .class_init = isa_device_class_init, +}; + +static void isabus_register_types(void) +{ + 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) + +static void parallel_init(ISABus *bus, int index, CharDriverState *chr) +{ + DeviceState *dev; + ISADevice *isadev; + + isadev = isa_create(bus, "isa-parallel"); + dev = DEVICE(isadev); + qdev_prop_set_uint32(dev, "index", index); + qdev_prop_set_chr(dev, "chardev", chr); + qdev_init_nofail(dev); +} + +void parallel_hds_isa_init(ISABus *bus, int n) +{ + int i; + + assert(n <= MAX_PARALLEL_PORTS); + + for (i = 0; i < n; i++) { + if (parallel_hds[i]) { + parallel_init(bus, i, parallel_hds[i]); + } + } +} |