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/*
* 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.h"
#include "sysemu.h"
#include "monitor.h"
#include "sysbus.h"
#include "isa.h"
struct ISABus {
BusState qbus;
qemu_irq *irqs;
uint32_t assigned;
};
static ISABus *isabus;
static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static struct BusInfo isa_bus_info = {
.name = "ISA",
.size = sizeof(ISABus),
.print_dev = isabus_dev_print,
};
ISABus *isa_bus_new(DeviceState *dev)
{
if (isabus) {
fprintf(stderr, "Can't create a second ISA bus\n");
return NULL;
}
if (NULL == dev) {
dev = qdev_create(NULL, "isabus-bridge");
qdev_init(dev);
}
isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
return isabus;
}
void isa_bus_irqs(qemu_irq *irqs)
{
isabus->irqs = irqs;
}
/*
* isa_reserve_irq() reserves the ISA irq and 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_reserve_irq(int isairq)
{
if (isairq < 0 || isairq > 15) {
fprintf(stderr, "isa irq %d invalid\n", isairq);
exit(1);
}
if (isabus->assigned & (1 << isairq)) {
fprintf(stderr, "isa irq %d already assigned\n", isairq);
exit(1);
}
isabus->assigned |= (1 << isairq);
return isabus->irqs[isairq];
}
void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
{
assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
if (isabus->assigned & (1 << isairq)) {
fprintf(stderr, "isa irq %d already assigned\n", isairq);
exit(1);
}
isabus->assigned |= (1 << isairq);
dev->isairq[dev->nirqs] = isairq;
*p = isabus->irqs[isairq];
dev->nirqs++;
}
static int isa_qdev_init(DeviceState *qdev, DeviceInfo *base)
{
ISADevice *dev = DO_UPCAST(ISADevice, qdev, qdev);
ISADeviceInfo *info = DO_UPCAST(ISADeviceInfo, qdev, base);
dev->isairq[0] = -1;
dev->isairq[1] = -1;
return info->init(dev);
}
void isa_qdev_register(ISADeviceInfo *info)
{
info->qdev.init = isa_qdev_init;
info->qdev.bus_info = &isa_bus_info;
qdev_register(&info->qdev);
}
ISADevice *isa_create_simple(const char *name)
{
DeviceState *dev;
if (!isabus) {
fprintf(stderr, "Tried to create isa device %s with no isa bus present.\n", name);
return NULL;
}
dev = qdev_create(&isabus->qbus, name);
qdev_init(dev);
return DO_UPCAST(ISADevice, qdev, dev);
}
static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
ISADevice *d = DO_UPCAST(ISADevice, qdev, 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 int isabus_bridge_init(SysBusDevice *dev)
{
/* nothing */
return 0;
}
static SysBusDeviceInfo isabus_bridge_info = {
.init = isabus_bridge_init,
.qdev.name = "isabus-bridge",
.qdev.size = sizeof(SysBusDevice),
.qdev.no_user = 1,
};
static void isabus_register_devices(void)
{
sysbus_register_withprop(&isabus_bridge_info);
}
device_init(isabus_register_devices)
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