hw/isa/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 2.1 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
  20 #include "qemu/osdep.h"
  21 #include "qemu/error-report.h"
  22 #include "qemu/module.h"
  23 #include "qapi/error.h"
  24 #include "monitor/monitor.h"
  25 #include "hw/sysbus.h"
  26 #include "sysemu/sysemu.h"
  27 #include "hw/isa/isa.h"
  28
  29 static ISABus *isabus;
  30
  31 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
  32 static char *isabus_get_fw_dev_path(DeviceState *dev);
  33
  34 static void isa_bus_class_init(ObjectClass *klass, void *data)
  35 {
  36     BusClass *k = BUS_CLASS(klass);
  37
  38     k->print_dev = isabus_dev_print;
  39     k->get_fw_dev_path = isabus_get_fw_dev_path;
  40 }
  41
  42 static const TypeInfo isa_dma_info = {
  43     .name = TYPE_ISADMA,
  44     .parent = TYPE_INTERFACE,
  45     .class_size = sizeof(IsaDmaClass),
  46 };
  47
  48 static const TypeInfo isa_bus_info = {
  49     .name = TYPE_ISA_BUS,
  50     .parent = TYPE_BUS,
  51     .instance_size = sizeof(ISABus),
  52     .class_init = isa_bus_class_init,
  53 };
  54
  55 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space,
  56                     MemoryRegion *address_space_io, Error **errp)
  57 {
  58     if (isabus) {
  59         error_setg(errp, "Can't create a second ISA bus");
  60         return NULL;
  61     }
  62     if (!dev) {
  63         dev = qdev_new("isabus-bridge");
  64         sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
  65     }
  66
  67     isabus = ISA_BUS(qbus_create(TYPE_ISA_BUS, dev, NULL));
  68     isabus->address_space = address_space;
  69     isabus->address_space_io = address_space_io;
  70     return isabus;
  71 }
  72
  73 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
  74 {
  75     bus->irqs = irqs;
  76 }
  77
  78 /*
  79  * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
  80  *
  81  * This function is only for special cases such as the 'ferr', and
  82  * temporary use for normal devices until they are converted to qdev.
  83  */
  84 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq)
  85 {
  86     assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
  87     assert(isairq < ISA_NUM_IRQS);
  88     return isabus->irqs[isairq];
  89 }
  90
  91 void isa_init_irq(ISADevice *dev, qemu_irq *p, unsigned isairq)
  92 {
  93     assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
  94     assert(isairq < ISA_NUM_IRQS);
  95     dev->isairq[dev->nirqs] = isairq;
  96     *p = isa_get_irq(dev, isairq);
  97     dev->nirqs++;
  98 }
  99
 100 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq)
 101 {
 102     qemu_irq irq;
 103     isa_init_irq(isadev, &irq, isairq);
 104     qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq);
 105 }
 106
 107 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
 108 {
 109     assert(bus && dma8 && dma16);
 110     assert(!bus->dma[0] && !bus->dma[1]);
 111     bus->dma[0] = dma8;
 112     bus->dma[1] = dma16;
 113 }
 114
 115 IsaDma *isa_get_dma(ISABus *bus, int nchan)
 116 {
 117     assert(bus);
 118     return bus->dma[nchan > 3 ? 1 : 0];
 119 }
 120
 121 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
 122 {
 123     if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
 124         dev->ioport_id = ioport;
 125     }
 126 }
 127
 128 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
 129 {
 130     memory_region_add_subregion(isabus->address_space_io, start, io);
 131     isa_init_ioport(dev, start);
 132 }
 133
 134 int isa_register_portio_list(ISADevice *dev,
 135                              PortioList *piolist, uint16_t start,
 136                              const MemoryRegionPortio *pio_start,
 137                              void *opaque, const char *name)
 138 {
 139     assert(piolist && !piolist->owner);
 140
 141     if (!isabus) {
 142         return -ENODEV;
 143     }
 144
 145     /* START is how we should treat DEV, regardless of the actual
 146        contents of the portio array.  This is how the old code
 147        actually handled e.g. the FDC device.  */
 148     isa_init_ioport(dev, start);
 149
 150     portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
 151     portio_list_add(piolist, isabus->address_space_io, start);
 152
 153     return 0;
 154 }
 155
 156 static void isa_device_init(Object *obj)
 157 {
 158     ISADevice *dev = ISA_DEVICE(obj);
 159
 160     dev->isairq[0] = -1;
 161     dev->isairq[1] = -1;
 162 }
 163
 164 ISADevice *isa_new(const char *name)
 165 {
 166     return ISA_DEVICE(qdev_new(name));
 167 }
 168
 169 ISADevice *isa_try_new(const char *name)
 170 {
 171     return ISA_DEVICE(qdev_try_new(name));
 172 }
 173
 174 ISADevice *isa_create_simple(ISABus *bus, const char *name)
 175 {
 176     ISADevice *dev;
 177
 178     dev = isa_new(name);
 179     isa_realize_and_unref(dev, bus, &error_fatal);
 180     return dev;
 181 }
 182
 183 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp)
 184 {
 185     return qdev_realize_and_unref(&dev->parent_obj, &bus->parent_obj, errp);
 186 }
 187
 188 ISADevice *isa_vga_init(ISABus *bus)
 189 {
 190     switch (vga_interface_type) {
 191     case VGA_CIRRUS:
 192         return isa_create_simple(bus, "isa-cirrus-vga");
 193     case VGA_QXL:
 194         error_report("%s: qxl: no PCI bus", __func__);
 195         return NULL;
 196     case VGA_STD:
 197         return isa_create_simple(bus, "isa-vga");
 198     case VGA_VMWARE:
 199         error_report("%s: vmware_vga: no PCI bus", __func__);
 200         return NULL;
 201     case VGA_VIRTIO:
 202         error_report("%s: virtio-vga: no PCI bus", __func__);
 203         return NULL;
 204     case VGA_NONE:
 205     default:
 206         return NULL;
 207     }
 208 }
 209
 210 void isa_build_aml(ISABus *bus, Aml *scope)
 211 {
 212     BusChild *kid;
 213     ISADevice *dev;
 214     ISADeviceClass *dc;
 215
 216     QTAILQ_FOREACH(kid, &bus->parent_obj.children, sibling) {
 217         dev = ISA_DEVICE(kid->child);
 218         dc = ISA_DEVICE_GET_CLASS(dev);
 219         if (dc->build_aml) {
 220             dc->build_aml(dev, scope);
 221         }
 222     }
 223 }
 224
 225 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 226 {
 227     ISADevice *d = ISA_DEVICE(dev);
 228
 229     if (d->isairq[1] != -1) {
 230         monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
 231                        d->isairq[0], d->isairq[1]);
 232     } else if (d->isairq[0] != -1) {
 233         monitor_printf(mon, "%*sisa irq %d\n", indent, "",
 234                        d->isairq[0]);
 235     }
 236 }
 237
 238 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
 239 {
 240     DeviceClass *dc = DEVICE_CLASS(klass);
 241
 242     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 243     dc->fw_name = "isa";
 244 }
 245
 246 static const TypeInfo isabus_bridge_info = {
 247     .name          = "isabus-bridge",
 248     .parent        = TYPE_SYS_BUS_DEVICE,
 249     .instance_size = sizeof(SysBusDevice),
 250     .class_init    = isabus_bridge_class_init,
 251 };
 252
 253 static void isa_device_class_init(ObjectClass *klass, void *data)
 254 {
 255     DeviceClass *k = DEVICE_CLASS(klass);
 256     k->bus_type = TYPE_ISA_BUS;
 257 }
 258
 259 static const TypeInfo isa_device_type_info = {
 260     .name = TYPE_ISA_DEVICE,
 261     .parent = TYPE_DEVICE,
 262     .instance_size = sizeof(ISADevice),
 263     .instance_init = isa_device_init,
 264     .abstract = true,
 265     .class_size = sizeof(ISADeviceClass),
 266     .class_init = isa_device_class_init,
 267 };
 268
 269 static void isabus_register_types(void)
 270 {
 271     type_register_static(&isa_dma_info);
 272     type_register_static(&isa_bus_info);
 273     type_register_static(&isabus_bridge_info);
 274     type_register_static(&isa_device_type_info);
 275 }
 276
 277 static char *isabus_get_fw_dev_path(DeviceState *dev)
 278 {
 279     ISADevice *d = ISA_DEVICE(dev);
 280     char path[40];
 281     int off;
 282
 283     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 284     if (d->ioport_id) {
 285         snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
 286     }
 287
 288     return g_strdup(path);
 289 }
 290
 291 MemoryRegion *isa_address_space(ISADevice *dev)
 292 {
 293     if (dev) {
 294         return isa_bus_from_device(dev)->address_space;
 295     }
 296
 297     return isabus->address_space;
 298 }
 299
 300 MemoryRegion *isa_address_space_io(ISADevice *dev)
 301 {
 302     if (dev) {
 303         return isa_bus_from_device(dev)->address_space_io;
 304     }
 305
 306     return isabus->address_space_io;
 307 }
 308
 309 type_init(isabus_register_types)