root / hw / isa-bus.c @ be40edcd
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/*
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* isa bus support for qdev.
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*
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* Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h" |
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#include "monitor.h" |
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#include "sysbus.h" |
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#include "isa.h" |
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#include "exec-memory.h" |
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struct ISABus {
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BusState qbus; |
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MemoryRegion *address_space_io; |
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qemu_irq *irqs; |
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}; |
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static ISABus *isabus;
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target_phys_addr_t isa_mem_base = 0;
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static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent); |
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static char *isabus_get_fw_dev_path(DeviceState *dev); |
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static struct BusInfo isa_bus_info = { |
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.name = "ISA",
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.size = sizeof(ISABus),
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.print_dev = isabus_dev_print, |
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.get_fw_dev_path = isabus_get_fw_dev_path, |
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}; |
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ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io) |
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{ |
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if (isabus) {
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fprintf(stderr, "Can't create a second ISA bus\n");
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return NULL; |
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} |
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if (NULL == dev) { |
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dev = qdev_create(NULL, "isabus-bridge"); |
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qdev_init_nofail(dev); |
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} |
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isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
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isabus->address_space_io = address_space_io; |
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return isabus;
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} |
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void isa_bus_irqs(qemu_irq *irqs)
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{ |
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isabus->irqs = irqs; |
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} |
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/*
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* isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
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*
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* This function is only for special cases such as the 'ferr', and
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* temporary use for normal devices until they are converted to qdev.
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*/
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qemu_irq isa_get_irq(int isairq)
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{ |
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if (isairq < 0 || isairq > 15) { |
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hw_error("isa irq %d invalid", isairq);
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} |
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return isabus->irqs[isairq];
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} |
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void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq) |
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{ |
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assert(dev->nirqs < ARRAY_SIZE(dev->isairq)); |
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dev->isairq[dev->nirqs] = isairq; |
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*p = isa_get_irq(isairq); |
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dev->nirqs++; |
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} |
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static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport) |
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{ |
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if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) { |
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dev->ioport_id = ioport; |
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} |
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} |
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void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
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{ |
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memory_region_add_subregion(isabus->address_space_io, start, io); |
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isa_init_ioport(dev, start); |
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} |
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void isa_register_portio_list(ISADevice *dev, uint16_t start,
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const MemoryRegionPortio *pio_start,
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void *opaque, const char *name) |
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{ |
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PortioList *piolist = g_new(PortioList, 1);
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/* START is how we should treat DEV, regardless of the actual
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contents of the portio array. This is how the old code
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actually handled e.g. the FDC device. */
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isa_init_ioport(dev, start); |
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portio_list_init(piolist, pio_start, opaque, name); |
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portio_list_add(piolist, isabus->address_space_io, start); |
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} |
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static int isa_qdev_init(DeviceState *qdev, DeviceInfo *base) |
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{ |
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ISADevice *dev = DO_UPCAST(ISADevice, qdev, qdev); |
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ISADeviceInfo *info = DO_UPCAST(ISADeviceInfo, qdev, base); |
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dev->isairq[0] = -1; |
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dev->isairq[1] = -1; |
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return info->init(dev);
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} |
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void isa_qdev_register(ISADeviceInfo *info)
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{ |
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info->qdev.init = isa_qdev_init; |
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info->qdev.bus_info = &isa_bus_info; |
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qdev_register(&info->qdev); |
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} |
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ISADevice *isa_create(const char *name) |
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{ |
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DeviceState *dev; |
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if (!isabus) {
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hw_error("Tried to create isa device %s with no isa bus present.",
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name); |
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} |
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dev = qdev_create(&isabus->qbus, name); |
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return DO_UPCAST(ISADevice, qdev, dev);
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} |
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ISADevice *isa_try_create(const char *name) |
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{ |
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DeviceState *dev; |
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if (!isabus) {
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hw_error("Tried to create isa device %s with no isa bus present.",
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name); |
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} |
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dev = qdev_try_create(&isabus->qbus, name); |
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return DO_UPCAST(ISADevice, qdev, dev);
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} |
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ISADevice *isa_create_simple(const char *name) |
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{ |
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ISADevice *dev; |
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dev = isa_create(name); |
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qdev_init_nofail(&dev->qdev); |
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return dev;
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} |
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static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent) |
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{ |
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ISADevice *d = DO_UPCAST(ISADevice, qdev, dev); |
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if (d->isairq[1] != -1) { |
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monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "", |
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d->isairq[0], d->isairq[1]); |
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} else if (d->isairq[0] != -1) { |
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monitor_printf(mon, "%*sisa irq %d\n", indent, "", |
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d->isairq[0]);
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} |
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} |
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static int isabus_bridge_init(SysBusDevice *dev) |
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{ |
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/* nothing */
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return 0; |
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} |
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static SysBusDeviceInfo isabus_bridge_info = {
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.init = isabus_bridge_init, |
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.qdev.name = "isabus-bridge",
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.qdev.fw_name = "isa",
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.qdev.size = sizeof(SysBusDevice),
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.qdev.no_user = 1,
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}; |
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static void isabus_register_devices(void) |
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{ |
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sysbus_register_withprop(&isabus_bridge_info); |
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} |
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static char *isabus_get_fw_dev_path(DeviceState *dev) |
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{ |
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ISADevice *d = (ISADevice*)dev; |
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char path[40]; |
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int off;
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off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev)); |
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if (d->ioport_id) {
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snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id); |
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} |
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return strdup(path);
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} |
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MemoryRegion *isa_address_space(ISADevice *dev) |
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{ |
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return get_system_memory();
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} |
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device_init(isabus_register_devices) |