qemu/hw/isa/isa-bus.c

290 lines
7.5 KiB
C

/*
* 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 "qemu/osdep.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "monitor/monitor.h"
#include "hw/sysbus.h"
#include "sysemu/sysemu.h"
#include "hw/isa/isa.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_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_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)
{
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++;
}
void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, int isairq)
{
qemu_irq irq;
isa_init_irq(isadev, &irq, 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);
}
void isa_register_portio_list(ISADevice *dev,
PortioList *piolist, uint16_t start,
const MemoryRegionPortio *pio_start,
void *opaque, const char *name)
{
assert(piolist && !piolist->owner);
/* 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);
}
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;
dev = qdev_create(BUS(bus), name);
return ISA_DEVICE(dev);
}
ISADevice *isa_try_create(ISABus *bus, const char *name)
{
DeviceState *dev;
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:
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;
}
}
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);
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),
.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_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)