hw/intc/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 "hw/i386/ioapic.h"
  23 #include "hw/i386/ioapic_internal.h"
  24 #include "hw/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 void ioapic_common_realize(DeviceState *dev, Error **errp)
  61 {
  62     IOAPICCommonState *s = IOAPIC_COMMON(dev);
  63     IOAPICCommonClass *info;
  64     static int ioapic_no;
  65
  66     if (ioapic_no >= MAX_IOAPICS) {
  67         error_setg(errp, "Only %d ioapics allowed", MAX_IOAPICS);
  68         return;
  69     }
  70
  71     info = IOAPIC_COMMON_GET_CLASS(s);
  72     info->init(s, ioapic_no);
  73
  74     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->io_memory);
  75     ioapic_no++;
  76 }
  77
  78 static const VMStateDescription vmstate_ioapic_common = {
  79     .name = "ioapic",
  80     .version_id = 3,
  81     .minimum_version_id = 1,
  82     .minimum_version_id_old = 1,
  83     .pre_save = ioapic_dispatch_pre_save,
  84     .post_load = ioapic_dispatch_post_load,
  85     .fields = (VMStateField[]) {
  86         VMSTATE_UINT8(id, IOAPICCommonState),
  87         VMSTATE_UINT8(ioregsel, IOAPICCommonState),
  88         VMSTATE_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */
  89         VMSTATE_UINT32_V(irr, IOAPICCommonState, 2),
  90         VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICCommonState, IOAPIC_NUM_PINS),
  91         VMSTATE_END_OF_LIST()
  92     }
  93 };
  94
  95 static void ioapic_common_class_init(ObjectClass *klass, void *data)
  96 {
  97     DeviceClass *dc = DEVICE_CLASS(klass);
  98
  99     dc->realize = ioapic_common_realize;
 100     dc->vmsd = &vmstate_ioapic_common;
 101     dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
 102 }
 103
 104 static const TypeInfo ioapic_common_type = {
 105     .name = TYPE_IOAPIC_COMMON,
 106     .parent = TYPE_SYS_BUS_DEVICE,
 107     .instance_size = sizeof(IOAPICCommonState),
 108     .class_size = sizeof(IOAPICCommonClass),
 109     .class_init = ioapic_common_class_init,
 110     .abstract = true,
 111 };
 112
 113 static void register_types(void)
 114 {
 115     type_register_static(&ioapic_common_type);
 116 }
 117
 118 type_init(register_types)