hw/isa-bus.c

   1 /*
   2  * isa bus support for qdev.
   3  *
   4  * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include "hw.h"
  20 #include "sysemu.h"
  21 #include "isa.h"
  22
  23 struct ISABus {
  24     BusState qbus;
  25 };
  26 static ISABus *isabus;
  27
  28 static struct BusInfo isa_bus_info = {
  29     .name  = "ISA",
  30     .size  = sizeof(ISABus),
  31     .props = (Property[]) {
  32         DEFINE_PROP_HEX32("iobase",  ISADevice, iobase[0], -1),
  33         DEFINE_PROP_HEX32("iobase2", ISADevice, iobase[1], -1),
  34         DEFINE_PROP_END_OF_LIST(),
  35     }
  36 };
  37
  38 ISABus *isa_bus_new(DeviceState *dev)
  39 {
  40     if (isabus) {
  41         fprintf(stderr, "Can't create a second ISA bus\n");
  42         return NULL;
  43     }
  44
  45     isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
  46     return isabus;
  47 }
  48
  49 void isa_connect_irq(ISADevice *dev, int n, qemu_irq irq)
  50 {
  51     assert(n >= 0 && n < dev->nirqs);
  52     if (dev->irqs[n])
  53         *dev->irqs[n] = irq;
  54 }
  55
  56 void isa_init_irq(ISADevice *dev, qemu_irq *p)
  57 {
  58     assert(dev->nirqs < ARRAY_SIZE(dev->irqs));
  59     dev->irqs[dev->nirqs] = p;
  60     dev->nirqs++;
  61 }
  62
  63 static void isa_qdev_init(DeviceState *qdev, DeviceInfo *base)
  64 {
  65     ISADevice *dev = DO_UPCAST(ISADevice, qdev, qdev);
  66     ISADeviceInfo *info = DO_UPCAST(ISADeviceInfo, qdev, base);
  67
  68     info->init(dev);
  69 }
  70
  71 void isa_qdev_register(ISADeviceInfo *info)
  72 {
  73     info->qdev.init = isa_qdev_init;
  74     info->qdev.bus_info = &isa_bus_info;
  75     qdev_register(&info->qdev);
  76 }
  77
  78 ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2)
  79 {
  80     DeviceState *dev;
  81     ISADevice *isa;
  82
  83     if (!isabus) {
  84         fprintf(stderr, "Tried to create isa device %s with no isa bus present.\n", name);
  85         return NULL;
  86     }
  87     dev = qdev_create(&isabus->qbus, name);
  88     isa = DO_UPCAST(ISADevice, qdev, dev);
  89     isa->iobase[0] = iobase;
  90     isa->iobase[1] = iobase2;
  91     qdev_init(dev);
  92     return isa;
  93 }