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         if (dev->mmio[n].memory) {
  54             memory_region_del_subregion(get_system_memory(),
  55                                         dev->mmio[n].memory);
  56         } else if (dev->mmio[n].unmap) {
  57             dev->mmio[n].unmap(dev, dev->mmio[n].addr);
  58         }
  59     }
  60     dev->mmio[n].addr = addr;
  61     if (dev->mmio[n].memory) {
  62         memory_region_add_subregion(get_system_memory(),
  63                                     addr,
  64                                     dev->mmio[n].memory);
  65     } else if (dev->mmio[n].cb) {
  66         dev->mmio[n].cb(dev, addr);
  67     }
  68 }
  69
  70
  71 /* Request an IRQ source.  The actual IRQ object may be populated later.  */
  72 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
  73 {
  74     int n;
  75
  76     assert(dev->num_irq < QDEV_MAX_IRQ);
  77     n = dev->num_irq++;
  78     dev->irqp[n] = p;
  79 }
  80
  81 /* Pass IRQs from a target device.  */
  82 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
  83 {
  84     int i;
  85     assert(dev->num_irq == 0);
  86     dev->num_irq = target->num_irq;
  87     for (i = 0; i < dev->num_irq; i++) {
  88         dev->irqp[i] = target->irqp[i];
  89     }
  90 }
  91
  92 void sysbus_init_mmio_cb2(SysBusDevice *dev,
  93                           mmio_mapfunc cb, mmio_mapfunc unmap)
  94 {
  95     int n;
  96
  97     assert(dev->num_mmio < QDEV_MAX_MMIO);
  98     n = dev->num_mmio++;
  99     dev->mmio[n].addr = -1;
 100     dev->mmio[n].cb = cb;
 101     dev->mmio[n].unmap = unmap;
 102 }
 103
 104 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory)
 105 {
 106     int n;
 107
 108     assert(dev->num_mmio < QDEV_MAX_MMIO);
 109     n = dev->num_mmio++;
 110     dev->mmio[n].addr = -1;
 111     dev->mmio[n].memory = memory;
 112 }
 113
 114 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
 115 {
 116     return dev->mmio[n].memory;
 117 }
 118
 119 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
 120 {
 121     pio_addr_t i;
 122
 123     for (i = 0; i < size; i++) {
 124         assert(dev->num_pio < QDEV_MAX_PIO);
 125         dev->pio[dev->num_pio++] = ioport++;
 126     }
 127 }
 128
 129 static int sysbus_device_init(DeviceState *dev, DeviceInfo *base)
 130 {
 131     SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);
 132
 133     return info->init(sysbus_from_qdev(dev));
 134 }
 135
 136 void sysbus_register_withprop(SysBusDeviceInfo *info)
 137 {
 138     info->qdev.init = sysbus_device_init;
 139     info->qdev.bus_info = &system_bus_info;
 140
 141     assert(info->qdev.size >= sizeof(SysBusDevice));
 142     qdev_register(&info->qdev);
 143 }
 144
 145 void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
 146 {
 147     SysBusDeviceInfo *info;
 148
 149     info = g_malloc0(sizeof(*info));
 150     info->qdev.name = g_strdup(name);
 151     info->qdev.size = size;
 152     info->init = init;
 153     sysbus_register_withprop(info);
 154 }
 155
 156 DeviceState *sysbus_create_varargs(const char *name,
 157                                    target_phys_addr_t addr, ...)
 158 {
 159     DeviceState *dev;
 160     SysBusDevice *s;
 161     va_list va;
 162     qemu_irq irq;
 163     int n;
 164
 165     dev = qdev_create(NULL, name);
 166     s = sysbus_from_qdev(dev);
 167     qdev_init_nofail(dev);
 168     if (addr != (target_phys_addr_t)-1) {
 169         sysbus_mmio_map(s, 0, addr);
 170     }
 171     va_start(va, addr);
 172     n = 0;
 173     while (1) {
 174         irq = va_arg(va, qemu_irq);
 175         if (!irq) {
 176             break;
 177         }
 178         sysbus_connect_irq(s, n, irq);
 179         n++;
 180     }
 181     va_end(va);
 182     return dev;
 183 }
 184
 185 DeviceState *sysbus_try_create_varargs(const char *name,
 186                                        target_phys_addr_t addr, ...)
 187 {
 188     DeviceState *dev;
 189     SysBusDevice *s;
 190     va_list va;
 191     qemu_irq irq;
 192     int n;
 193
 194     dev = qdev_try_create(NULL, name);
 195     if (!dev) {
 196         return NULL;
 197     }
 198     s = sysbus_from_qdev(dev);
 199     qdev_init_nofail(dev);
 200     if (addr != (target_phys_addr_t)-1) {
 201         sysbus_mmio_map(s, 0, addr);
 202     }
 203     va_start(va, addr);
 204     n = 0;
 205     while (1) {
 206         irq = va_arg(va, qemu_irq);
 207         if (!irq) {
 208             break;
 209         }
 210         sysbus_connect_irq(s, n, irq);
 211         n++;
 212     }
 213     va_end(va);
 214     return dev;
 215 }
 216
 217 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 218 {
 219     SysBusDevice *s = sysbus_from_qdev(dev);
 220     target_phys_addr_t size;
 221     int i;
 222
 223     monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
 224     for (i = 0; i < s->num_mmio; i++) {
 225         size = 0;
 226         if (s->mmio[i].memory) {
 227             size = memory_region_size(s->mmio[i].memory);
 228         }
 229         monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
 230                        indent, "", s->mmio[i].addr, size);
 231     }
 232 }
 233
 234 static char *sysbus_get_fw_dev_path(DeviceState *dev)
 235 {
 236     SysBusDevice *s = sysbus_from_qdev(dev);
 237     char path[40];
 238     int off;
 239
 240     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 241
 242     if (s->num_mmio) {
 243         snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
 244                  s->mmio[0].addr);
 245     } else if (s->num_pio) {
 246         snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
 247     }
 248
 249     return strdup(path);
 250 }
 251
 252 void sysbus_add_memory(SysBusDevice *dev, target_phys_addr_t addr,
 253                        MemoryRegion *mem)
 254 {
 255     memory_region_add_subregion(get_system_memory(), addr, mem);
 256 }
 257
 258 void sysbus_add_memory_overlap(SysBusDevice *dev, target_phys_addr_t addr,
 259                                MemoryRegion *mem, unsigned priority)
 260 {
 261     memory_region_add_subregion_overlap(get_system_memory(), addr, mem,
 262                                         priority);
 263 }
 264
 265 void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem)
 266 {
 267     memory_region_del_subregion(get_system_memory(), mem);
 268 }
 269
 270 void sysbus_add_io(SysBusDevice *dev, target_phys_addr_t addr,
 271                        MemoryRegion *mem)
 272 {
 273     memory_region_add_subregion(get_system_io(), addr, mem);
 274 }
 275
 276 void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
 277 {
 278     memory_region_del_subregion(get_system_io(), mem);
 279 }