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