LXR qemu/hw/intc/ioapic

   1/*
   2 *  IOAPIC emulation logic - common bits of emulated and KVM kernel model
   3 *
   4 *  Copyright (c) 2004-2005 Fabrice Bellard
   5 *  Copyright (c) 2009      Xiantao Zhang, Intel
   6 *  Copyright (c) 2011      Jan Kiszka, Siemens AG
   7 *
   8 * This library is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU Lesser General Public
  10 * License as published by the Free Software Foundation; either
  11 * version 2 of the License, or (at your option) any later version.
  12 *
  13 * This library is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 * Lesser General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU Lesser General Public
  19 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22#include "hw/i386/ioapic.h"
  23#include "hw/i386/ioapic_internal.h"
  24#include "hw/sysbus.h"
  25
  26/* ioapic_no count start from 0 to MAX_IOAPICS,
  27 * remove as static variable from ioapic_common_init.
  28 * now as a global variable, let child to increase the counter
  29 * then we can drop the 'instance_no' argument
  30 * and convert to our QOM's realize function
  31 */
  32int ioapic_no;
  33
  34void ioapic_reset_common(DeviceState *dev)
  35{
  36    IOAPICCommonState *s = IOAPIC_COMMON(dev);
  37    int i;
  38
  39    s->id = 0;
  40    s->ioregsel = 0;
  41    s->irr = 0;
  42    for (i = 0; i < IOAPIC_NUM_PINS; i++) {
  43        s->ioredtbl[i] = 1 << IOAPIC_LVT_MASKED_SHIFT;
  44    }
  45}
  46
  47static void ioapic_dispatch_pre_save(void *opaque)
  48{
  49    IOAPICCommonState *s = IOAPIC_COMMON(opaque);
  50    IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s);
  51
  52    if (info->pre_save) {
  53        info->pre_save(s);
  54    }
  55}
  56
  57static int ioapic_dispatch_post_load(void *opaque, int version_id)
  58{
  59    IOAPICCommonState *s = IOAPIC_COMMON(opaque);
  60    IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s);
  61
  62    if (info->post_load) {
  63        info->post_load(s);
  64    }
  65    return 0;
  66}
  67
  68static void ioapic_common_realize(DeviceState *dev, Error **errp)
  69{
  70    IOAPICCommonState *s = IOAPIC_COMMON(dev);
  71    IOAPICCommonClass *info;
  72
  73    if (ioapic_no >= MAX_IOAPICS) {
  74        error_setg(errp, "Only %d ioapics allowed", MAX_IOAPICS);
  75        return;
  76    }
  77
  78    info = IOAPIC_COMMON_GET_CLASS(s);
  79    info->realize(dev, errp);
  80
  81    sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->io_memory);
  82    ioapic_no++;
  83}
  84
  85static const VMStateDescription vmstate_ioapic_common = {
  86    .name = "ioapic",
  87    .version_id = 3,
  88    .minimum_version_id = 1,
  89    .pre_save = ioapic_dispatch_pre_save,
  90    .post_load = ioapic_dispatch_post_load,
  91    .fields = (VMStateField[]) {
  92        VMSTATE_UINT8(id, IOAPICCommonState),
  93        VMSTATE_UINT8(ioregsel, IOAPICCommonState),
  94        VMSTATE_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */
  95        VMSTATE_UINT32_V(irr, IOAPICCommonState, 2),
  96        VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICCommonState, IOAPIC_NUM_PINS),
  97        VMSTATE_END_OF_LIST()
  98    }
  99};
 100
 101static void ioapic_common_class_init(ObjectClass *klass, void *data)
 102{
 103    DeviceClass *dc = DEVICE_CLASS(klass);
 104
 105    dc->realize = ioapic_common_realize;
 106    dc->vmsd = &vmstate_ioapic_common;
 107}
 108
 109static const TypeInfo ioapic_common_type = {
 110    .name = TYPE_IOAPIC_COMMON,
 111    .parent = TYPE_SYS_BUS_DEVICE,
 112    .instance_size = sizeof(IOAPICCommonState),
 113    .class_size = sizeof(IOAPICCommonClass),
 114    .class_init = ioapic_common_class_init,
 115    .abstract = true,
 116};
 117
 118static void ioapic_common_register_types(void)
 119{
 120    type_register_static(&ioapic_common_type);
 121}
 122
 123type_init(ioapic_common_register_types)
 124