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 "sysemu.h"
  22 #include "monitor.h"
  23
  24 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
  25
  26 struct BusInfo system_bus_info = {
  27     .name       = "System",
  28     .size       = sizeof(BusState),
  29     .print_dev  = sysbus_dev_print,
  30 };
  31
  32 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
  33 {
  34     assert(n >= 0 && n < dev->num_irq);
  35     dev->irqs[n] = NULL;
  36     if (dev->irqp[n]) {
  37         *dev->irqp[n] = irq;
  38     }
  39 }
  40
  41 void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
  42 {
  43     assert(n >= 0 && n < dev->num_mmio);
  44
  45     if (dev->mmio[n].addr == addr) {
  46         /* ??? region already mapped here.  */
  47         return;
  48     }
  49     if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
  50         /* Unregister previous mapping.  */
  51         cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size,
  52                                      IO_MEM_UNASSIGNED);
  53     }
  54     dev->mmio[n].addr = addr;
  55     if (dev->mmio[n].cb) {
  56         dev->mmio[n].cb(dev, addr);
  57     } else {
  58         cpu_register_physical_memory(addr, dev->mmio[n].size,
  59                                      dev->mmio[n].iofunc);
  60     }
  61 }
  62
  63
  64 /* Request an IRQ source.  The actual IRQ object may be populated later.  */
  65 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
  66 {
  67     int n;
  68
  69     assert(dev->num_irq < QDEV_MAX_IRQ);
  70     n = dev->num_irq++;
  71     dev->irqp[n] = p;
  72 }
  73
  74 /* Pass IRQs from a target device.  */
  75 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
  76 {
  77     int i;
  78     assert(dev->num_irq == 0);
  79     dev->num_irq = target->num_irq;
  80     for (i = 0; i < dev->num_irq; i++) {
  81         dev->irqp[i] = target->irqp[i];
  82     }
  83 }
  84
  85 void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size, int iofunc)
  86 {
  87     int n;
  88
  89     assert(dev->num_mmio < QDEV_MAX_MMIO);
  90     n = dev->num_mmio++;
  91     dev->mmio[n].addr = -1;
  92     dev->mmio[n].size = size;
  93     dev->mmio[n].iofunc = iofunc;
  94 }
  95
  96 void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
  97                          mmio_mapfunc cb)
  98 {
  99     int n;
 100
 101     assert(dev->num_mmio < QDEV_MAX_MMIO);
 102     n = dev->num_mmio++;
 103     dev->mmio[n].addr = -1;
 104     dev->mmio[n].size = size;
 105     dev->mmio[n].cb = cb;
 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 = qemu_mallocz(sizeof(*info));
 129     info->qdev.name = qemu_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(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     return dev;
 161 }
 162
 163 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 164 {
 165     SysBusDevice *s = sysbus_from_qdev(dev);
 166     int i;
 167
 168     for (i = 0; i < s->num_mmio; i++) {
 169         monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
 170                        indent, "", s->mmio[i].addr, s->mmio[i].size);
 171     }
 172 }