mirror of https://gitee.com/openkylin/qemu.git
224 lines
5.6 KiB
C
224 lines
5.6 KiB
C
/*
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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 void isa_init_ioport_one(ISADevice *dev, uint16_t ioport)
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{
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assert(dev->nioports < ARRAY_SIZE(dev->ioports));
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dev->ioports[dev->nioports++] = ioport;
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}
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static int isa_cmp_ports(const void *p1, const void *p2)
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{
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return *(uint16_t*)p1 - *(uint16_t*)p2;
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}
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void isa_init_ioport_range(ISADevice *dev, uint16_t start, uint16_t length)
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{
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int i;
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for (i = start; i < start + length; i++) {
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isa_init_ioport_one(dev, i);
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}
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qsort(dev->ioports, dev->nioports, sizeof(dev->ioports[0]), isa_cmp_ports);
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}
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void isa_init_ioport(ISADevice *dev, uint16_t ioport)
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{
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isa_init_ioport_range(dev, ioport, 1);
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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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if (dev != NULL) {
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assert(dev->nio < ARRAY_SIZE(dev->io));
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dev->io[dev->nio++] = io;
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isa_init_ioport_range(dev, start, memory_region_size(io));
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}
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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->nioports) {
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snprintf(path + off, sizeof(path) - off, "@%04x", d->ioports[0]);
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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)
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