qemu/hw/isa/isa-bus.c

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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 "qemu/osdep.h"
2016-03-14 11:01:28 +03:00
#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"
#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_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,
isa: Clean up error handling around isa_bus_new() We can have at most one ISA bus. If you try to create another one, isa_bus_new() complains to stderr and returns null. isa_bus_new() is called in two contexts, machine's init() and device's realize() methods. Since complaining to stderr is not proper in the latter context, convert isa_bus_new() to Error. Machine's init(): * mips_jazz_init(), called from the init() methods of machines "magnum" and "pica" * mips_r4k_init(), the init() method of machine "mips" * pc_init1() called from the init() methods of non-q35 PC machines * typhoon_init(), called from clipper_init(), the init() method of machine "clipper" These callers always create the first ISA bus, hence isa_bus_new() can't fail. Simply pass &error_abort. Device's realize(): * i82378_realize(), of PCI device "i82378" * ich9_lpc_realize(), of PCI device "ICH9-LPC" * pci_ebus_realize(), of PCI device "ebus" * piix3_realize(), of PCI device "pci-piix3", abstract parent of "PIIX3" and "PIIX3-xen" * piix4_realize(), of PCI device "PIIX4" * vt82c686b_realize(), of PCI device "VT82C686B" Propagate the error. Note that these devices are typically created only by machine init() methods with qdev_init_nofail() or similar. If we screwed up and created an ISA bus before that call, we now give up right away. Before, we'd hobble on, and typically die in isa_bus_irqs(). Similar if someone finds a way to hot-plug one of these critters. Cc: Richard Henderson <rth@twiddle.net> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: "Hervé Poussineau" <hpoussin@reactos.org> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Markus Armbruster <armbru@pond.sub.org> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Hervé Poussineau <hpoussin@reactos.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <1450370121-5768-11-git-send-email-armbru@redhat.com>
2015-12-17 19:35:18 +03:00
MemoryRegion *address_space_io, Error **errp)
{
if (isabus) {
isa: Clean up error handling around isa_bus_new() We can have at most one ISA bus. If you try to create another one, isa_bus_new() complains to stderr and returns null. isa_bus_new() is called in two contexts, machine's init() and device's realize() methods. Since complaining to stderr is not proper in the latter context, convert isa_bus_new() to Error. Machine's init(): * mips_jazz_init(), called from the init() methods of machines "magnum" and "pica" * mips_r4k_init(), the init() method of machine "mips" * pc_init1() called from the init() methods of non-q35 PC machines * typhoon_init(), called from clipper_init(), the init() method of machine "clipper" These callers always create the first ISA bus, hence isa_bus_new() can't fail. Simply pass &error_abort. Device's realize(): * i82378_realize(), of PCI device "i82378" * ich9_lpc_realize(), of PCI device "ICH9-LPC" * pci_ebus_realize(), of PCI device "ebus" * piix3_realize(), of PCI device "pci-piix3", abstract parent of "PIIX3" and "PIIX3-xen" * piix4_realize(), of PCI device "PIIX4" * vt82c686b_realize(), of PCI device "VT82C686B" Propagate the error. Note that these devices are typically created only by machine init() methods with qdev_init_nofail() or similar. If we screwed up and created an ISA bus before that call, we now give up right away. Before, we'd hobble on, and typically die in isa_bus_irqs(). Similar if someone finds a way to hot-plug one of these critters. Cc: Richard Henderson <rth@twiddle.net> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: "Hervé Poussineau" <hpoussin@reactos.org> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Markus Armbruster <armbru@pond.sub.org> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Hervé Poussineau <hpoussin@reactos.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <1450370121-5768-11-git-send-email-armbru@redhat.com>
2015-12-17 19:35:18 +03:00
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_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, 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;
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:
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_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)
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]);
}
}
}