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 "monitor/monitor.h"
  21 #include "sysbus.h"
  22 #include "sysemu/sysemu.h"
  23 #include "isa.h"
  24 #include "exec/address-spaces.h"
  25
  26 static ISABus *isabus;
  27 hwaddr isa_mem_base = 0;
  28
  29 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
  30 static char *isabus_get_fw_dev_path(DeviceState *dev);
  31
  32 static void isa_bus_class_init(ObjectClass *klass, void *data)
  33 {
  34     BusClass *k = BUS_CLASS(klass);
  35
  36     k->print_dev = isabus_dev_print;
  37     k->get_fw_dev_path = isabus_get_fw_dev_path;
  38 }
  39
  40 static const TypeInfo isa_bus_info = {
  41     .name = TYPE_ISA_BUS,
  42     .parent = TYPE_BUS,
  43     .instance_size = sizeof(ISABus),
  44     .class_init = isa_bus_class_init,
  45 };
  46
  47 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io)
  48 {
  49     if (isabus) {
  50         fprintf(stderr, "Can't create a second ISA bus\n");
  51         return NULL;
  52     }
  53     if (NULL == dev) {
  54         dev = qdev_create(NULL, "isabus-bridge");
  55         qdev_init_nofail(dev);
  56     }
  57
  58     isabus = FROM_QBUS(ISABus, qbus_create(TYPE_ISA_BUS, dev, NULL));
  59     isabus->address_space_io = address_space_io;
  60     return isabus;
  61 }
  62
  63 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs)
  64 {
  65     if (!bus) {
  66         hw_error("Can't set isa irqs with no isa bus present.");
  67     }
  68     bus->irqs = irqs;
  69 }
  70
  71 /*
  72  * isa_get_irq() returns the corresponding qemu_irq entry for the i8259.
  73  *
  74  * This function is only for special cases such as the 'ferr', and
  75  * temporary use for normal devices until they are converted to qdev.
  76  */
  77 qemu_irq isa_get_irq(ISADevice *dev, int isairq)
  78 {
  79     assert(!dev || DO_UPCAST(ISABus, qbus, dev->qdev.parent_bus) == isabus);
  80     if (isairq < 0 || isairq > 15) {
  81         hw_error("isa irq %d invalid", isairq);
  82     }
  83     return isabus->irqs[isairq];
  84 }
  85
  86 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
  87 {
  88     assert(dev->nirqs < ARRAY_SIZE(dev->isairq));
  89     dev->isairq[dev->nirqs] = isairq;
  90     *p = isa_get_irq(dev, isairq);
  91     dev->nirqs++;
  92 }
  93
  94 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport)
  95 {
  96     if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) {
  97         dev->ioport_id = ioport;
  98     }
  99 }
 100
 101 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
 102 {
 103     memory_region_add_subregion(isabus->address_space_io, start, io);
 104     isa_init_ioport(dev, start);
 105 }
 106
 107 void isa_register_portio_list(ISADevice *dev, uint16_t start,
 108                               const MemoryRegionPortio *pio_start,
 109                               void *opaque, const char *name)
 110 {
 111     PortioList *piolist = g_new(PortioList, 1);
 112
 113     /* START is how we should treat DEV, regardless of the actual
 114        contents of the portio array.  This is how the old code
 115        actually handled e.g. the FDC device.  */
 116     isa_init_ioport(dev, start);
 117
 118     portio_list_init(piolist, pio_start, opaque, name);
 119     portio_list_add(piolist, isabus->address_space_io, start);
 120 }
 121
 122 static int isa_qdev_init(DeviceState *qdev)
 123 {
 124     ISADevice *dev = ISA_DEVICE(qdev);
 125     ISADeviceClass *klass = ISA_DEVICE_GET_CLASS(dev);
 126
 127     if (klass->init) {
 128         return klass->init(dev);
 129     }
 130
 131     return 0;
 132 }
 133
 134 static void isa_device_init(Object *obj)
 135 {
 136     ISADevice *dev = ISA_DEVICE(obj);
 137
 138     dev->isairq[0] = -1;
 139     dev->isairq[1] = -1;
 140 }
 141
 142 ISADevice *isa_create(ISABus *bus, const char *name)
 143 {
 144     DeviceState *dev;
 145
 146     if (!bus) {
 147         hw_error("Tried to create isa device %s with no isa bus present.",
 148                  name);
 149     }
 150     dev = qdev_create(&bus->qbus, name);
 151     return ISA_DEVICE(dev);
 152 }
 153
 154 ISADevice *isa_try_create(ISABus *bus, const char *name)
 155 {
 156     DeviceState *dev;
 157
 158     if (!bus) {
 159         hw_error("Tried to create isa device %s with no isa bus present.",
 160                  name);
 161     }
 162     dev = qdev_try_create(&bus->qbus, name);
 163     return ISA_DEVICE(dev);
 164 }
 165
 166 ISADevice *isa_create_simple(ISABus *bus, const char *name)
 167 {
 168     ISADevice *dev;
 169
 170     dev = isa_create(bus, name);
 171     qdev_init_nofail(&dev->qdev);
 172     return dev;
 173 }
 174
 175 ISADevice *isa_vga_init(ISABus *bus)
 176 {
 177     switch (vga_interface_type) {
 178     case VGA_CIRRUS:
 179         return isa_create_simple(bus, "isa-cirrus-vga");
 180     case VGA_QXL:
 181         fprintf(stderr, "%s: qxl: no PCI bus\n", __func__);
 182         return NULL;
 183     case VGA_STD:
 184         return isa_create_simple(bus, "isa-vga");
 185     case VGA_VMWARE:
 186         fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __func__);
 187         return NULL;
 188     case VGA_NONE:
 189     default:
 190         return NULL;
 191     }
 192 }
 193
 194 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 195 {
 196     ISADevice *d = ISA_DEVICE(dev);
 197
 198     if (d->isairq[1] != -1) {
 199         monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
 200                        d->isairq[0], d->isairq[1]);
 201     } else if (d->isairq[0] != -1) {
 202         monitor_printf(mon, "%*sisa irq %d\n", indent, "",
 203                        d->isairq[0]);
 204     }
 205 }
 206
 207 static int isabus_bridge_init(SysBusDevice *dev)
 208 {
 209     /* nothing */
 210     return 0;
 211 }
 212
 213 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
 214 {
 215     DeviceClass *dc = DEVICE_CLASS(klass);
 216     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 217
 218     k->init = isabus_bridge_init;
 219     dc->fw_name = "isa";
 220     dc->no_user = 1;
 221 }
 222
 223 static const TypeInfo isabus_bridge_info = {
 224     .name          = "isabus-bridge",
 225     .parent        = TYPE_SYS_BUS_DEVICE,
 226     .instance_size = sizeof(SysBusDevice),
 227     .class_init    = isabus_bridge_class_init,
 228 };
 229
 230 static void isa_device_class_init(ObjectClass *klass, void *data)
 231 {
 232     DeviceClass *k = DEVICE_CLASS(klass);
 233     k->init = isa_qdev_init;
 234     k->bus_type = TYPE_ISA_BUS;
 235 }
 236
 237 static const TypeInfo isa_device_type_info = {
 238     .name = TYPE_ISA_DEVICE,
 239     .parent = TYPE_DEVICE,
 240     .instance_size = sizeof(ISADevice),
 241     .instance_init = isa_device_init,
 242     .abstract = true,
 243     .class_size = sizeof(ISADeviceClass),
 244     .class_init = isa_device_class_init,
 245 };
 246
 247 static void isabus_register_types(void)
 248 {
 249     type_register_static(&isa_bus_info);
 250     type_register_static(&isabus_bridge_info);
 251     type_register_static(&isa_device_type_info);
 252 }
 253
 254 static char *isabus_get_fw_dev_path(DeviceState *dev)
 255 {
 256     ISADevice *d = (ISADevice*)dev;
 257     char path[40];
 258     int off;
 259
 260     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 261     if (d->ioport_id) {
 262         snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
 263     }
 264
 265     return g_strdup(path);
 266 }
 267
 268 MemoryRegion *isa_address_space(ISADevice *dev)
 269 {
 270     return get_system_memory();
 271 }
 272
 273 MemoryRegion *isa_address_space_io(ISADevice *dev)
 274 {
 275     if (dev) {
 276         return isa_bus_from_device(dev)->address_space_io;
 277     }
 278
 279     return isabus->address_space_io;
 280 }
 281
 282 type_init(isabus_register_types)