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     SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);
 111
 112     return info->init(sysbus_from_qdev(dev));
 113 }
 114
 115 void sysbus_register_withprop(SysBusDeviceInfo *info)
 116 {
 117     info->qdev.init = sysbus_device_init;
 118     info->qdev.bus_info = &system_bus_info;
 119
 120     assert(info->qdev.size >= sizeof(SysBusDevice));
 121     qdev_register(&info->qdev);
 122 }
 123
 124 void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
 125 {
 126     SysBusDeviceInfo *info;
 127
 128     info = g_malloc0(sizeof(*info));
 129     info->qdev.name = g_strdup(name);
 130     info->qdev.size = size;
 131     info->init = init;
 132     sysbus_register_withprop(info);
 133 }
 134
 135 DeviceState *sysbus_create_varargs(const char *name,
 136                                    target_phys_addr_t addr, ...)
 137 {
 138     DeviceState *dev;
 139     SysBusDevice *s;
 140     va_list va;
 141     qemu_irq irq;
 142     int n;
 143
 144     dev = qdev_create(NULL, name);
 145     s = sysbus_from_qdev(dev);
 146     qdev_init_nofail(dev);
 147     if (addr != (target_phys_addr_t)-1) {
 148         sysbus_mmio_map(s, 0, addr);
 149     }
 150     va_start(va, addr);
 151     n = 0;
 152     while (1) {
 153         irq = va_arg(va, qemu_irq);
 154         if (!irq) {
 155             break;
 156         }
 157         sysbus_connect_irq(s, n, irq);
 158         n++;
 159     }
 160     va_end(va);
 161     return dev;
 162 }
 163
 164 DeviceState *sysbus_try_create_varargs(const char *name,
 165                                        target_phys_addr_t addr, ...)
 166 {
 167     DeviceState *dev;
 168     SysBusDevice *s;
 169     va_list va;
 170     qemu_irq irq;
 171     int n;
 172
 173     dev = qdev_try_create(NULL, name);
 174     if (!dev) {
 175         return NULL;
 176     }
 177     s = sysbus_from_qdev(dev);
 178     qdev_init_nofail(dev);
 179     if (addr != (target_phys_addr_t)-1) {
 180         sysbus_mmio_map(s, 0, addr);
 181     }
 182     va_start(va, addr);
 183     n = 0;
 184     while (1) {
 185         irq = va_arg(va, qemu_irq);
 186         if (!irq) {
 187             break;
 188         }
 189         sysbus_connect_irq(s, n, irq);
 190         n++;
 191     }
 192     va_end(va);
 193     return dev;
 194 }
 195
 196 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 197 {
 198     SysBusDevice *s = sysbus_from_qdev(dev);
 199     target_phys_addr_t size;
 200     int i;
 201
 202     monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
 203     for (i = 0; i < s->num_mmio; i++) {
 204         size = memory_region_size(s->mmio[i].memory);
 205         monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
 206                        indent, "", s->mmio[i].addr, size);
 207     }
 208 }
 209
 210 static char *sysbus_get_fw_dev_path(DeviceState *dev)
 211 {
 212     SysBusDevice *s = sysbus_from_qdev(dev);
 213     char path[40];
 214     int off;
 215
 216     off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
 217
 218     if (s->num_mmio) {
 219         snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
 220                  s->mmio[0].addr);
 221     } else if (s->num_pio) {
 222         snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
 223     }
 224
 225     return strdup(path);
 226 }
 227
 228 void sysbus_add_memory(SysBusDevice *dev, target_phys_addr_t addr,
 229                        MemoryRegion *mem)
 230 {
 231     memory_region_add_subregion(get_system_memory(), addr, mem);
 232 }
 233
 234 void sysbus_add_memory_overlap(SysBusDevice *dev, target_phys_addr_t addr,
 235                                MemoryRegion *mem, unsigned priority)
 236 {
 237     memory_region_add_subregion_overlap(get_system_memory(), addr, mem,
 238                                         priority);
 239 }
 240
 241 void sysbus_del_memory(SysBusDevice *dev, MemoryRegion *mem)
 242 {
 243     memory_region_del_subregion(get_system_memory(), mem);
 244 }
 245
 246 void sysbus_add_io(SysBusDevice *dev, target_phys_addr_t addr,
 247                        MemoryRegion *mem)
 248 {
 249     memory_region_add_subregion(get_system_io(), addr, mem);
 250 }
 251
 252 void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
 253 {
 254     memory_region_del_subregion(get_system_io(), mem);
 255 }
 256
 257 MemoryRegion *sysbus_address_space(SysBusDevice *dev)
 258 {
 259     return get_system_memory();
 260 }