hw/ioapic_common.c

   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 "ioapic.h"
  23 #include "ioapic_internal.h"
  24 #include "sysbus.h"
  25
  26 void ioapic_reset_common(DeviceState *dev)
  27 {
  28     IOAPICCommonState *s = IOAPIC_COMMON(dev);
  29     int i;
  30
  31     s->id = 0;
  32     s->ioregsel = 0;
  33     s->irr = 0;
  34     for (i = 0; i < IOAPIC_NUM_PINS; i++) {
  35         s->ioredtbl[i] = 1 << IOAPIC_LVT_MASKED_SHIFT;
  36     }
  37 }
  38
  39 static void ioapic_dispatch_pre_save(void *opaque)
  40 {
  41     IOAPICCommonState *s = IOAPIC_COMMON(opaque);
  42     IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s);
  43
  44     if (info->pre_save) {
  45         info->pre_save(s);
  46     }
  47 }
  48
  49 static int ioapic_dispatch_post_load(void *opaque, int version_id)
  50 {
  51     IOAPICCommonState *s = IOAPIC_COMMON(opaque);
  52     IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s);
  53
  54     if (info->post_load) {
  55         info->post_load(s);
  56     }
  57     return 0;
  58 }
  59
  60 static int ioapic_init_common(SysBusDevice *dev)
  61 {
  62     IOAPICCommonState *s = FROM_SYSBUS(IOAPICCommonState, dev);
  63     IOAPICCommonClass *info;
  64     static int ioapic_no;
  65
  66     if (ioapic_no >= MAX_IOAPICS) {
  67         return -1;
  68     }
  69
  70     info = IOAPIC_COMMON_GET_CLASS(s);
  71     info->init(s, ioapic_no);
  72
  73     sysbus_init_mmio(&s->busdev, &s->io_memory);
  74     ioapic_no++;
  75
  76     return 0;
  77 }
  78
  79 static const VMStateDescription vmstate_ioapic_common = {
  80     .name = "ioapic",
  81     .version_id = 3,
  82     .minimum_version_id = 1,
  83     .minimum_version_id_old = 1,
  84     .pre_save = ioapic_dispatch_pre_save,
  85     .post_load = ioapic_dispatch_post_load,
  86     .fields = (VMStateField[]) {
  87         VMSTATE_UINT8(id, IOAPICCommonState),
  88         VMSTATE_UINT8(ioregsel, IOAPICCommonState),
  89         VMSTATE_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */
  90         VMSTATE_UINT32_V(irr, IOAPICCommonState, 2),
  91         VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICCommonState, IOAPIC_NUM_PINS),
  92         VMSTATE_END_OF_LIST()
  93     }
  94 };
  95
  96 static void ioapic_common_class_init(ObjectClass *klass, void *data)
  97 {
  98     SysBusDeviceClass *sc = SYS_BUS_DEVICE_CLASS(klass);
  99
 100     sc->init = ioapic_init_common;
 101 }
 102
 103 static TypeInfo ioapic_common_type = {
 104     .name = TYPE_IOAPIC_COMMON,
 105     .parent = TYPE_SYS_BUS_DEVICE,
 106     .instance_size = sizeof(IOAPICCommonState),
 107     .class_size = sizeof(IOAPICCommonClass),
 108     .class_init = ioapic_common_class_init,
 109     .abstract = true,
 110 };
 111
 112 void ioapic_qdev_register(DeviceInfo *info)
 113 {
 114     info->vmsd = &vmstate_ioapic_common;
 115     info->no_user = 1;
 116     sysbus_qdev_register_subclass(info, TYPE_IOAPIC_COMMON);
 117 }
 118
 119 static void register_devices(void)
 120 {
 121     type_register_static(&ioapic_common_type);
 122 }
 123
 124 device_init(register_devices);
 125