isa-bus.c (7136B)
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 2.1 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/sysbus.h" 25 #include "sysemu/sysemu.h" 26 #include "hw/isa/isa.h" 27 #include "hw/acpi/acpi_aml_interface.h" 28 29 static ISABus *isabus; 30 31 static char *isabus_get_fw_dev_path(DeviceState *dev); 32 33 static void isa_bus_class_init(ObjectClass *klass, void *data) 34 { 35 BusClass *k = BUS_CLASS(klass); 36 37 k->get_fw_dev_path = isabus_get_fw_dev_path; 38 } 39 40 static const TypeInfo isa_dma_info = { 41 .name = TYPE_ISADMA, 42 .parent = TYPE_INTERFACE, 43 .class_size = sizeof(IsaDmaClass), 44 }; 45 46 static const TypeInfo isa_bus_info = { 47 .name = TYPE_ISA_BUS, 48 .parent = TYPE_BUS, 49 .instance_size = sizeof(ISABus), 50 .class_init = isa_bus_class_init, 51 }; 52 53 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion* address_space, 54 MemoryRegion *address_space_io, Error **errp) 55 { 56 if (isabus) { 57 error_setg(errp, "Can't create a second ISA bus"); 58 return NULL; 59 } 60 if (!dev) { 61 dev = qdev_new("isabus-bridge"); 62 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); 63 } 64 65 isabus = ISA_BUS(qbus_new(TYPE_ISA_BUS, dev, NULL)); 66 isabus->address_space = address_space; 67 isabus->address_space_io = address_space_io; 68 return isabus; 69 } 70 71 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs) 72 { 73 bus->irqs = irqs; 74 } 75 76 /* 77 * isa_get_irq() returns the corresponding qemu_irq entry for the i8259. 78 * 79 * This function is only for special cases such as the 'ferr', and 80 * temporary use for normal devices until they are converted to qdev. 81 */ 82 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq) 83 { 84 assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus); 85 assert(isairq < ISA_NUM_IRQS); 86 return isabus->irqs[isairq]; 87 } 88 89 void isa_connect_gpio_out(ISADevice *isadev, int gpioirq, unsigned isairq) 90 { 91 qemu_irq irq = isa_get_irq(isadev, isairq); 92 qdev_connect_gpio_out(DEVICE(isadev), gpioirq, irq); 93 } 94 95 void isa_bus_dma(ISABus *bus, IsaDma *dma8, IsaDma *dma16) 96 { 97 assert(bus && dma8 && dma16); 98 assert(!bus->dma[0] && !bus->dma[1]); 99 bus->dma[0] = dma8; 100 bus->dma[1] = dma16; 101 } 102 103 IsaDma *isa_get_dma(ISABus *bus, int nchan) 104 { 105 assert(bus); 106 return bus->dma[nchan > 3 ? 1 : 0]; 107 } 108 109 static inline void isa_init_ioport(ISADevice *dev, uint16_t ioport) 110 { 111 if (dev && (dev->ioport_id == 0 || ioport < dev->ioport_id)) { 112 dev->ioport_id = ioport; 113 } 114 } 115 116 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start) 117 { 118 memory_region_add_subregion(isabus->address_space_io, start, io); 119 isa_init_ioport(dev, start); 120 } 121 122 int isa_register_portio_list(ISADevice *dev, 123 PortioList *piolist, uint16_t start, 124 const MemoryRegionPortio *pio_start, 125 void *opaque, const char *name) 126 { 127 assert(piolist && !piolist->owner); 128 129 if (!isabus) { 130 return -ENODEV; 131 } 132 133 /* START is how we should treat DEV, regardless of the actual 134 contents of the portio array. This is how the old code 135 actually handled e.g. the FDC device. */ 136 isa_init_ioport(dev, start); 137 138 portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name); 139 portio_list_add(piolist, isabus->address_space_io, start); 140 141 return 0; 142 } 143 144 ISADevice *isa_new(const char *name) 145 { 146 return ISA_DEVICE(qdev_new(name)); 147 } 148 149 ISADevice *isa_try_new(const char *name) 150 { 151 return ISA_DEVICE(qdev_try_new(name)); 152 } 153 154 ISADevice *isa_create_simple(ISABus *bus, const char *name) 155 { 156 ISADevice *dev; 157 158 dev = isa_new(name); 159 isa_realize_and_unref(dev, bus, &error_fatal); 160 return dev; 161 } 162 163 bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp) 164 { 165 return qdev_realize_and_unref(&dev->parent_obj, &bus->parent_obj, errp); 166 } 167 168 ISADevice *isa_vga_init(ISABus *bus) 169 { 170 vga_interface_created = true; 171 switch (vga_interface_type) { 172 case VGA_CIRRUS: 173 return isa_create_simple(bus, "isa-cirrus-vga"); 174 case VGA_QXL: 175 error_report("%s: qxl: no PCI bus", __func__); 176 return NULL; 177 case VGA_STD: 178 return isa_create_simple(bus, "isa-vga"); 179 case VGA_VMWARE: 180 error_report("%s: vmware_vga: no PCI bus", __func__); 181 return NULL; 182 case VGA_VIRTIO: 183 error_report("%s: virtio-vga: no PCI bus", __func__); 184 return NULL; 185 case VGA_NONE: 186 default: 187 return NULL; 188 } 189 } 190 191 void isa_build_aml(ISABus *bus, Aml *scope) 192 { 193 BusChild *kid; 194 195 QTAILQ_FOREACH(kid, &bus->parent_obj.children, sibling) { 196 call_dev_aml_func(DEVICE(kid->child), scope); 197 } 198 } 199 200 static void isabus_bridge_class_init(ObjectClass *klass, void *data) 201 { 202 DeviceClass *dc = DEVICE_CLASS(klass); 203 204 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 205 dc->fw_name = "isa"; 206 } 207 208 static const TypeInfo isabus_bridge_info = { 209 .name = "isabus-bridge", 210 .parent = TYPE_SYS_BUS_DEVICE, 211 .instance_size = sizeof(SysBusDevice), 212 .class_init = isabus_bridge_class_init, 213 }; 214 215 static void isa_device_class_init(ObjectClass *klass, void *data) 216 { 217 DeviceClass *k = DEVICE_CLASS(klass); 218 k->bus_type = TYPE_ISA_BUS; 219 } 220 221 static const TypeInfo isa_device_type_info = { 222 .name = TYPE_ISA_DEVICE, 223 .parent = TYPE_DEVICE, 224 .instance_size = sizeof(ISADevice), 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_dma_info); 233 type_register_static(&isa_bus_info); 234 type_register_static(&isabus_bridge_info); 235 type_register_static(&isa_device_type_info); 236 } 237 238 static char *isabus_get_fw_dev_path(DeviceState *dev) 239 { 240 ISADevice *d = ISA_DEVICE(dev); 241 char path[40]; 242 int off; 243 244 off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev)); 245 if (d->ioport_id) { 246 snprintf(path + off, sizeof(path) - off, "@%04x", d->ioport_id); 247 } 248 249 return g_strdup(path); 250 } 251 252 MemoryRegion *isa_address_space(ISADevice *dev) 253 { 254 if (dev) { 255 return isa_bus_from_device(dev)->address_space; 256 } 257 258 return isabus->address_space; 259 } 260 261 MemoryRegion *isa_address_space_io(ISADevice *dev) 262 { 263 if (dev) { 264 return isa_bus_from_device(dev)->address_space_io; 265 } 266 267 return isabus->address_space_io; 268 } 269 270 type_init(isabus_register_types)