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 #include "hw/hw.h"
  20 #include "monitor/monitor.h"
  21 #include "hw/sysbus.h"
  22 #include "sysemu/sysemu.h"
  23 #include "hw/isa/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 = ISA_BUS(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 || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == 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;
 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     /* FIXME: the device should store created PortioList in its state.  Note
 119        that DEV can be NULL here and that single device can register several
 120        portio lists.  Current implementation is leaking memory allocated
 121        in portio_list_init.  The leak is not critical because it happens only
 122        at initialization time.  */
 123     portio_list_init(&piolist, OBJECT(dev), pio_start, opaque, name);
 124     portio_list_add(&piolist, isabus->address_space_io, start);
 125 }
 126
 127 static void isa_device_init(Object *obj)
 128 {
 129     ISADevice *dev = ISA_DEVICE(obj);
 130
 131     dev->isairq[0] = -1;
 132     dev->isairq[1] = -1;
 133 }
 134
 135 ISADevice *isa_create(ISABus *bus, const char *name)
 136 {
 137     DeviceState *dev;
 138
 139     if (!bus) {
 140         hw_error("Tried to create isa device %s with no isa bus present.",
 141                  name);
 142     }
 143     dev = qdev_create(BUS(bus), name);
 144     return ISA_DEVICE(dev);
 145 }
 146
 147 ISADevice *isa_try_create(ISABus *bus, const char *name)
 148 {
 149     DeviceState *dev;
 150
 151     if (!bus) {
 152         hw_error("Tried to create isa device %s with no isa bus present.",
 153                  name);
 154     }
 155     dev = qdev_try_create(BUS(bus), name);
 156     return ISA_DEVICE(dev);
 157 }
 158
 159 ISADevice *isa_create_simple(ISABus *bus, const char *name)
 160 {
 161     ISADevice *dev;
 162
 163     dev = isa_create(bus, name);
 164     qdev_init_nofail(DEVICE(dev));
 165     return dev;
 166 }
 167
 168 ISADevice *isa_vga_init(ISABus *bus)
 169 {
 170     switch (vga_interface_type) {
 171     case VGA_CIRRUS:
 172         return isa_create_simple(bus, "isa-cirrus-vga");
 173     case VGA_QXL:
 174         fprintf(stderr, "%s: qxl: no PCI bus\n", __func__);
 175         return NULL;
 176     case VGA_STD:
 177         return isa_create_simple(bus, "isa-vga");
 178     case VGA_VMWARE:
 179         fprintf(stderr, "%s: vmware_vga: no PCI bus\n", __func__);
 180         return NULL;
 181     case VGA_NONE:
 182     default:
 183         return NULL;
 184     }
 185 }
 186
 187 static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 188 {
 189     ISADevice *d = ISA_DEVICE(dev);
 190
 191     if (d->isairq[1] != -1) {
 192         monitor_printf(mon, "%*sisa irqs %d,%d\n", indent, "",
 193                        d->isairq[0], d->isairq[1]);
 194     } else if (d->isairq[0] != -1) {
 195         monitor_printf(mon, "%*sisa irq %d\n", indent, "",
 196                        d->isairq[0]);
 197     }
 198 }
 199
 200 static void isabus_bridge_class_init(ObjectClass *klass, void *data)
 201 {
 202     DeviceClass *dc = DEVICE_CLASS(klass);
 203
 204     dc->fw_name = "isa";
 205 }
 206
 207 static const TypeInfo isabus_bridge_info = {
 208     .name          = "isabus-bridge",
 209     .parent        = TYPE_SYS_BUS_DEVICE,
 210     .instance_size = sizeof(SysBusDevice),
 211     .class_init    = isabus_bridge_class_init,
 212 };
 213
 214 static void isa_device_class_init(ObjectClass *klass, void *data)
 215 {
 216     DeviceClass *k = DEVICE_CLASS(klass);
 217     k->bus_type = TYPE_ISA_BUS;
 218 }
 219
 220 static const TypeInfo isa_device_type_info = {
 221     .name = TYPE_ISA_DEVICE,
 222     .parent = TYPE_DEVICE,
 223     .instance_size = sizeof(ISADevice),
 224     .instance_init = isa_device_init,
 225     .abstract = true,
 226     .class_size = sizeof(ISADeviceClass),
 227     .class_init = isa_device_class_init,
 228 };
 229
 230 static void isabus_register_types(void)
 231 {
 232     type_register_static(&isa_bus_info);
 233     type_register_static(&isabus_bridge_info);
 234     type_register_static(&isa_device_type_info);
 235 }
 236
 237 static char *isabus_get_fw_dev_path(DeviceState *dev)
 238 {
 239     ISADevice *d = ISA_DEVICE(dev);
 240     char path[40];
 241     int off;
 242
 243     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 244     if (d->ioport_id) {
 245         snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id);
 246     }
 247
 248     return g_strdup(path);
 249 }
 250
 251 MemoryRegion *isa_address_space(ISADevice *dev)
 252 {
 253     return get_system_memory();
 254 }
 255
 256 MemoryRegion *isa_address_space_io(ISADevice *dev)
 257 {
 258     if (dev) {
 259         return isa_bus_from_device(dev)->address_space_io;
 260     }
 261
 262     return isabus->address_space_io;
 263 }
 264
 265 type_init(isabus_register_types)