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