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         {
  33             .name   = "iobase",
  34             .info   = &qdev_prop_hex32,
  35             .offset = offsetof(ISADevice, iobase[0]),
  36             .defval = (uint32_t[]) { -1 },
  37         },{
  38             .name   = "iobase2",
  39             .info   = &qdev_prop_hex32,
  40             .offset = offsetof(ISADevice, iobase[1]),
  41             .defval = (uint32_t[]) { -1 },
  42         },
  43         {/* end of list */}
  44     }
  45 };
  46
  47 ISABus *isa_bus_new(DeviceState *dev)
  48 {
  49     if (isabus) {
  50         fprintf(stderr, "Can't create a second ISA bus\n");
  51         return NULL;
  52     }
  53
  54     isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
  55     return isabus;
  56 }
  57
  58 void isa_connect_irq(ISADevice *dev, int n, qemu_irq irq)
  59 {
  60     assert(n >= 0 && n < dev->nirqs);
  61     if (dev->irqs[n])
  62         *dev->irqs[n] = irq;
  63 }
  64
  65 void isa_init_irq(ISADevice *dev, qemu_irq *p)
  66 {
  67     assert(dev->nirqs < ARRAY_SIZE(dev->irqs));
  68     dev->irqs[dev->nirqs] = p;
  69     dev->nirqs++;
  70 }
  71
  72 static void isa_qdev_init(DeviceState *qdev, DeviceInfo *base)
  73 {
  74     ISADevice *dev = DO_UPCAST(ISADevice, qdev, qdev);
  75     ISADeviceInfo *info = DO_UPCAST(ISADeviceInfo, qdev, base);
  76
  77     info->init(dev);
  78 }
  79
  80 void isa_qdev_register(ISADeviceInfo *info)
  81 {
  82     info->qdev.init = isa_qdev_init;
  83     info->qdev.bus_info = &isa_bus_info;
  84     qdev_register(&info->qdev);
  85 }
  86
  87 ISADevice *isa_create_simple(const char *name, uint32_t iobase, uint32_t iobase2)
  88 {
  89     DeviceState *dev;
  90     ISADevice *isa;
  91
  92     if (!isabus) {
  93         fprintf(stderr, "Tried to create isa device %s with no isa bus present.\n", name);
  94         return NULL;
  95     }
  96     dev = qdev_create(&isabus->qbus, name);
  97     isa = DO_UPCAST(ISADevice, qdev, dev);
  98     isa->iobase[0] = iobase;
  99     isa->iobase[1] = iobase2;
 100     qdev_init(dev);
 101     return isa;
 102 }