hw/sysbus.c

   1 /*
   2  *  System (CPU) Bus device support code
   3  *
   4  *  Copyright (c) 2009 CodeSourcery
   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 "sysbus.h"
  21 #include "monitor.h"
  22 #include "exec-memory.h"
  23
  24 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
  25 static char *sysbus_get_fw_dev_path(DeviceState *dev);
  26
  27 struct BusInfo system_bus_info = {
  28     .name       = "System",
  29     .size       = sizeof(BusState),
  30     .print_dev  = sysbus_dev_print,
  31     .get_fw_dev_path = sysbus_get_fw_dev_path,
  32 };
  33
  34 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
  35 {
  36     assert(n >= 0 && n < dev->num_irq);
  37     dev->irqs[n] = NULL;
  38     if (dev->irqp[n]) {
  39         *dev->irqp[n] = irq;
  40     }
  41 }
  42
  43 void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
  44 {
  45     assert(n >= 0 && n < dev->num_mmio);
  46
  47     if (dev->mmio[n].addr == addr) {
  48         /* ??? region already mapped here.  */
  49         return;
  50     }
  51     if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
  52         /* Unregister previous mapping.  */
  53         memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
  54     }
  55     dev->mmio[n].addr = addr;
  56     memory_region_add_subregion(get_system_memory(),
  57                                 addr,
  58                                 dev->mmio[n].memory);
  59 }
  60
  61
  62 /* Request an IRQ source.  The actual IRQ object may be populated later.  */
  63 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
  64 {
  65     int n;
  66
  67     assert(dev->num_irq < QDEV_MAX_IRQ);
  68     n = dev->num_irq++;
  69     dev->irqp[n] = p;
  70 }
  71
  72 /* Pass IRQs from a target device.  */
  73 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
  74 {
  75     int i;
  76     assert(dev->num_irq == 0);
  77     dev->num_irq = target->num_irq;
  78     for (i = 0; i < dev->num_irq; i++) {
  79         dev->irqp[i] = target->irqp[i];
  80     }
  81 }
  82
  83 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
  84 {
  85     int n;
  86
  87     assert(dev->num_mmio < QDEV_MAX_MMIO);
  88     n = dev->num_mmio++;
  89     dev->mmio[n].addr = -1;
  90     dev->mmio[n].memory = memory;
  91 }
  92
  93 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
  94 {
  95     return dev->mmio[n].memory;
  96 }
  97
  98 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
  99 {
 100     pio_addr_t i;
 101
 102     for (i = 0; i < size; i++) {
 103         assert(dev->num_pio < QDEV_MAX_PIO);
 104         dev->pio[dev->num_pio++] = ioport++;
 105     }
 106 }
 107
 108 static int sysbus_device_init(DeviceState *dev, DeviceInfo *base)
 109 {
 110     SysBusDevice *sd = SYS_BUS_DEVICE(dev);
 111     SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);
 112
 113     return sbc->init(sd);
 114 }
 115
 116 void sysbus_qdev_register_subclass(DeviceInfo *info, const char *parent)
 117 {
 118     info->init = sysbus_device_init;
 119     info->bus_info = &system_bus_info;
 120
 121     assert(info->size >= sizeof(SysBusDevice));
 122     qdev_register_subclass(info, parent);
 123 }
 124
 125 void sysbus_qdev_register(DeviceInfo *info)
 126 {
 127     sysbus_qdev_register_subclass(info, TYPE_SYS_BUS_DEVICE);
 128 }
 129
 130 DeviceState *sysbus_create_varargs(const char *name,
 131                                    target_phys_addr_t addr, ...)
 132 {
 133     DeviceState *dev;
 134     SysBusDevice *s;
 135     va_list va;
 136     qemu_irq irq;
 137     int n;
 138
 139     dev = qdev_create(NULL, name);
 140     s = sysbus_from_qdev(dev);
 141     qdev_init_nofail(dev);
 142     if (addr != (target_phys_addr_t)-1) {
 143         sysbus_mmio_map(s, 0, addr);
 144     }
 145     va_start(va, addr);
 146     n = 0;
 147     while (1) {
 148         irq = va_arg(va, qemu_irq);
 149         if (!irq) {
 150             break;
 151         }
 152         sysbus_connect_irq(s, n, irq);
 153         n++;
 154     }
 155     va_end(va);
 156     return dev;
 157 }
 158
 159 DeviceState *sysbus_try_create_varargs(const char *name,
 160                                        target_phys_addr_t addr, ...)
 161 {
 162     DeviceState *dev;
 163     SysBusDevice *s;
 164     va_list va;
 165     qemu_irq irq;
 166     int n;
 167
 168     dev = qdev_try_create(NULL, name);
 169     if (!dev) {
 170         return NULL;
 171     }
 172     s = sysbus_from_qdev(dev);
 173     qdev_init_nofail(dev);
 174     if (addr != (target_phys_addr_t)-1) {
 175         sysbus_mmio_map(s, 0, addr);
 176     }
 177     va_start(va, addr);
 178     n = 0;
 179     while (1) {
 180         irq = va_arg(va, qemu_irq);
 181         if (!irq) {
 182             break;
 183         }
 184         sysbus_connect_irq(s, n, irq);
 185         n++;
 186     }
 187     va_end(va);
 188     return dev;
 189 }
 190
 191 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 192 {
 193     SysBusDevice *s = sysbus_from_qdev(dev);
 194     target_phys_addr_t size;
 195     int i;
 196
 197     monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
 198     for (i = 0; i < s->num_mmio; i++) {
 199         size = memory_region_size(s->mmio[i].memory);
 200         monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
 201                        indent, "", s->mmio[i].addr, size);
 202     }
 203 }
 204
 205 static char *sysbus_get_fw_dev_path(DeviceState *dev)
 206 {
 207     SysBusDevice *s = sysbus_from_qdev(dev);
 208     char path[40];
 209     int off;
 210
 211     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 212
 213     if (s->num_mmio) {
 214         snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
 215                  s->mmio[0].addr);
 216     } else if (s->num_pio) {
 217         snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
 218     }
 219
 220     return strdup(path);
 221 }
 222
 223 void sysbus_add_memory(SysBusDevice *dev, target_phys_addr_t addr,
 224                        MemoryRegion *mem)
 225 {
 226     memory_region_add_subregion(get_system_memory(), addr, mem);
 227 }
 228
 229 void sysbus_add_memory_overlap(SysBusDevice *dev, target_phys_addr_t addr,
 230                                MemoryRegion *mem, unsigned priority)
 231 {
 232     memory_region_add_subregion_overlap(get_system_memory(), addr, mem,
 233                                         priority);
 234 }
 235
 236 void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem)
 237 {
 238     memory_region_del_subregion(get_system_memory(), mem);
 239 }
 240
 241 void sysbus_add_io(SysBusDevice *dev, target_phys_addr_t addr,
 242                        MemoryRegion *mem)
 243 {
 244     memory_region_add_subregion(get_system_io(), addr, mem);
 245 }
 246
 247 void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
 248 {
 249     memory_region_del_subregion(get_system_io(), mem);
 250 }
 251
 252 MemoryRegion *sysbus_address_space(SysBusDevice *dev)
 253 {
 254     return get_system_memory();
 255 }
 256
 257 static TypeInfo sysbus_device_type_info = {
 258     .name = TYPE_SYS_BUS_DEVICE,
 259     .parent = TYPE_DEVICE,
 260     .instance_size = sizeof(SysBusDevice),
 261     .abstract = true,
 262     .class_size = sizeof(SysBusDeviceClass),
 263 };
 264
 265 static void sysbus_register(void)
 266 {
 267     type_register_static(&sysbus_device_type_info);
 268 }
 269
 270 device_init(sysbus_register);