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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
  19  */
  20
  21 #include "sysbus.h"
  22 #include "sysemu.h"
  23 #include "monitor.h"
  24
  25 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
  26
  27 struct BusInfo system_bus_info = {
  28     .name       = "System",
  29     .size       = sizeof(BusState),
  30     .print_dev  = sysbus_dev_print,
  31 };
  32
  33 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
  34 {
  35     assert(n >= 0 && n < dev->num_irq);
  36     dev->irqs[n] = 0;
  37     if (dev->irqp[n]) {
  38         *dev->irqp[n] = irq;
  39     }
  40 }
  41
  42 void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
  43 {
  44     assert(n >= 0 && n < dev->num_mmio);
  45
  46     if (dev->mmio[n].addr == addr) {
  47         /* ??? region already mapped here.  */
  48         return;
  49     }
  50     if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
  51         /* Unregister previous mapping.  */
  52         cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size,
  53                                      IO_MEM_UNASSIGNED);
  54     }
  55     dev->mmio[n].addr = addr;
  56     if (dev->mmio[n].cb) {
  57         dev->mmio[n].cb(dev, addr);
  58     } else {
  59         cpu_register_physical_memory(addr, dev->mmio[n].size,
  60                                      dev->mmio[n].iofunc);
  61     }
  62 }
  63
  64
  65 /* Request an IRQ source.  The actual IRQ object may be populated later.  */
  66 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p)
  67 {
  68     int n;
  69
  70     assert(dev->num_irq < QDEV_MAX_IRQ);
  71     n = dev->num_irq++;
  72     dev->irqp[n] = p;
  73 }
  74
  75 /* Pass IRQs from a target device.  */
  76 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
  77 {
  78     int i;
  79     assert(dev->num_irq == 0);
  80     dev->num_irq = target->num_irq;
  81     for (i = 0; i < dev->num_irq; i++) {
  82         dev->irqp[i] = target->irqp[i];
  83     }
  84 }
  85
  86 void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size, int iofunc)
  87 {
  88     int n;
  89
  90     assert(dev->num_mmio < QDEV_MAX_MMIO);
  91     n = dev->num_mmio++;
  92     dev->mmio[n].addr = -1;
  93     dev->mmio[n].size = size;
  94     dev->mmio[n].iofunc = iofunc;
  95 }
  96
  97 void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
  98                          mmio_mapfunc cb)
  99 {
 100     int n;
 101
 102     assert(dev->num_mmio < QDEV_MAX_MMIO);
 103     n = dev->num_mmio++;
 104     dev->mmio[n].addr = -1;
 105     dev->mmio[n].size = size;
 106     dev->mmio[n].cb = cb;
 107 }
 108
 109 static void sysbus_device_init(DeviceState *dev, DeviceInfo *base)
 110 {
 111     SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);
 112
 113     info->init(sysbus_from_qdev(dev));
 114 }
 115
 116 void sysbus_register_withprop(SysBusDeviceInfo *info)
 117 {
 118     info->qdev.init = sysbus_device_init;
 119     info->qdev.bus_info = &system_bus_info;
 120
 121     assert(info->qdev.size >= sizeof(SysBusDevice));
 122     qdev_register(&info->qdev);
 123 }
 124
 125 void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
 126 {
 127     SysBusDeviceInfo *info;
 128
 129     info = qemu_mallocz(sizeof(*info));
 130     info->qdev.name = qemu_strdup(name);
 131     info->qdev.size = size;
 132     info->init = init;
 133     sysbus_register_withprop(info);
 134 }
 135
 136 DeviceState *sysbus_create_varargs(const char *name,
 137                                    target_phys_addr_t addr, ...)
 138 {
 139     DeviceState *dev;
 140     SysBusDevice *s;
 141     va_list va;
 142     qemu_irq irq;
 143     int n;
 144
 145     dev = qdev_create(NULL, name);
 146     s = sysbus_from_qdev(dev);
 147     qdev_init(dev);
 148     if (addr != (target_phys_addr_t)-1) {
 149         sysbus_mmio_map(s, 0, addr);
 150     }
 151     va_start(va, addr);
 152     n = 0;
 153     while (1) {
 154         irq = va_arg(va, qemu_irq);
 155         if (!irq) {
 156             break;
 157         }
 158         sysbus_connect_irq(s, n, irq);
 159         n++;
 160     }
 161     return dev;
 162 }
 163
 164 static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
 165 {
 166     SysBusDevice *s = sysbus_from_qdev(dev);
 167     int i;
 168
 169     for (i = 0; i < s->num_mmio; i++) {
 170         monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
 171                        indent, "", s->mmio[i].addr, s->mmio[i].size);
 172     }
 173 }