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_create(NULL, "isabus-bridge");
  65         qdev_init_nofail(dev);
  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, int isairq)
  86 {
  87     assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
  88     if (isairq < 0 || isairq > 15) {
  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, int isairq)
  95 {
  96     assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
  97     dev->isairq[dev->nirqs] = isairq;
  98     *p = isa_get_irq(dev, isairq);
  99     dev->nirqs++;
 100 }
 101
 102 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, int isairq)
 103 {
 104     qemu_irq irq;
 105     isa_init_irq(isadev, &irq, isairq);
 106     qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq);
 107 }
 108
 109 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16)
 110 {
 111     assert(bus && dma8 && dma16);
 112     assert(!bus->dma[0] && !bus->dma[1]);
 113     bus->dma[0] = dma8;
 114     bus->dma[1] = dma16;
 115 }
 116
 117 IsaDma *isa_get_dma(ISABus *bus, int nchan)
 118 {
 119     assert(bus);
 120     return bus->dma[nchan > 3 ? 1 : 0];
 121 }
 122
 123 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
 124 {
 125     if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
 126         dev->ioport_id = ioport;
 127     }
 128 }
 129
 130 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
 131 {
 132     memory_region_add_subregion(isabus->address_space_io, start, io);
 133     isa_init_ioport(dev, start);
 134 }
 135
 136 void isa_register_portio_list(ISADevice *dev,
 137                               PortioList *piolist, uint16_t start,
 138                               const MemoryRegionPortio *pio_start,
 139                               void *opaque, const char *name)
 140 {
 141     assert(piolist && !piolist->owner);
 142
 143     /* START is how we should treat DEV, regardless of the actual
 144        contents of the portio array.  This is how the old code
 145        actually handled e.g. the FDC device.  */
 146     isa_init_ioport(dev, start);
 147
 148     portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
 149     portio_list_add(piolist, isabus->address_space_io, start);
 150 }
 151
 152 static void isa_device_init(Object *obj)
 153 {
 154     ISADevice *dev = ISA_DEVICE(obj);
 155
 156     dev->isairq[0] = -1;
 157     dev->isairq[1] = -1;
 158 }
 159
 160 ISADevice *isa_create(ISABus *bus, const char *name)
 161 {
 162     DeviceState *dev;
 163
 164     dev = qdev_create(BUS(bus), name);
 165     return ISA_DEVICE(dev);
 166 }
 167
 168 ISADevice *isa_try_create(ISABus *bus, const char *name)
 169 {
 170     DeviceState *dev;
 171
 172     dev = qdev_try_create(BUS(bus), name);
 173     return ISA_DEVICE(dev);
 174 }
 175
 176 ISADevice *isa_create_simple(ISABus *bus, const char *name)
 177 {
 178     ISADevice *dev;
 179
 180     dev = isa_create(bus, name);
 181     qdev_init_nofail(DEVICE(dev));
 182     return dev;
 183 }
 184
 185 ISADevice *isa_vga_init(ISABus *bus)
 186 {
 187     switch (vga_interface_type) {
 188     case VGA_CIRRUS:
 189         return isa_create_simple(bus, "isa-cirrus-vga");
 190     case VGA_QXL:
 191         error_report("%s: qxl: no PCI bus", __func__);
 192         return NULL;
 193     case VGA_STD:
 194         return isa_create_simple(bus, "isa-vga");
 195     case VGA_VMWARE:
 196         error_report("%s: vmware_vga: no PCI bus", __func__);
 197         return NULL;
 198     case VGA_VIRTIO:
 199         error_report("%s: virtio-vga: no PCI bus", __func__);
 200         return NULL;
 201     case VGA_NONE:
 202     default:
 203         return NULL;
 204     }
 205 }
 206
 207 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 208 {
 209     ISADevice *d = ISA_DEVICE(dev);
 210
 211     if (d->isairq[1] != -1) {
 212         monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
 213                        d->isairq[0], d->isairq[1]);
 214     } else if (d->isairq[0] != -1) {
 215         monitor_printf(mon, "%*sisa irq %d\n", indent, "",
 216                        d->isairq[0]);
 217     }
 218 }
 219
 220 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
 221 {
 222     DeviceClass *dc = DEVICE_CLASS(klass);
 223
 224     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 225     dc->fw_name = "isa";
 226 }
 227
 228 static const TypeInfo isabus_bridge_info = {
 229     .name          = "isabus-bridge",
 230     .parent        = TYPE_SYS_BUS_DEVICE,
 231     .instance_size = sizeof(SysBusDevice),
 232     .class_init    = isabus_bridge_class_init,
 233 };
 234
 235 static void isa_device_class_init(ObjectClass *klass, void *data)
 236 {
 237     DeviceClass *k = DEVICE_CLASS(klass);
 238     k->bus_type = TYPE_ISA_BUS;
 239 }
 240
 241 static const TypeInfo isa_device_type_info = {
 242     .name = TYPE_ISA_DEVICE,
 243     .parent = TYPE_DEVICE,
 244     .instance_size = sizeof(ISADevice),
 245     .instance_init = isa_device_init,
 246     .abstract = true,
 247     .class_size = sizeof(ISADeviceClass),
 248     .class_init = isa_device_class_init,
 249 };
 250
 251 static void isabus_register_types(void)
 252 {
 253     type_register_static(&isa_dma_info);
 254     type_register_static(&isa_bus_info);
 255     type_register_static(&isabus_bridge_info);
 256     type_register_static(&isa_device_type_info);
 257 }
 258
 259 static char *isabus_get_fw_dev_path(DeviceState *dev)
 260 {
 261     ISADevice *d = ISA_DEVICE(dev);
 262     char path[40];
 263     int off;
 264
 265     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 266     if (d->ioport_id) {
 267         snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
 268     }
 269
 270     return g_strdup(path);
 271 }
 272
 273 MemoryRegion *isa_address_space(ISADevice *dev)
 274 {
 275     if (dev) {
 276         return isa_bus_from_device(dev)->address_space;
 277     }
 278
 279     return isabus->address_space;
 280 }
 281
 282 MemoryRegion *isa_address_space_io(ISADevice *dev)
 283 {
 284     if (dev) {
 285         return isa_bus_from_device(dev)->address_space_io;
 286     }
 287
 288     return isabus->address_space_io;
 289 }
 290
 291 type_init(isabus_register_types)