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