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 = DO_UPCAST(IOAPICCommonState, busdev.qdev, 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 = opaque;
  42     IOAPICCommonInfo *info =
  43         DO_UPCAST(IOAPICCommonInfo, busdev.qdev, qdev_get_info(&s->busdev.qdev));
  44
  45     if (info->pre_save) {
  46         info->pre_save(s);
  47     }
  48 }
  49
  50 static int ioapic_dispatch_post_load(void *opaque, int version_id)
  51 {
  52     IOAPICCommonState *s = opaque;
  53     IOAPICCommonInfo *info =
  54         DO_UPCAST(IOAPICCommonInfo, busdev.qdev, qdev_get_info(&s->busdev.qdev));
  55
  56     if (info->post_load) {
  57         info->post_load(s);
  58     }
  59     return 0;
  60 }
  61
  62 static int ioapic_init_common(SysBusDevice *dev)
  63 {
  64     IOAPICCommonState *s = FROM_SYSBUS(IOAPICCommonState, dev);
  65     IOAPICCommonInfo *info;
  66     static int ioapic_no;
  67
  68     if (ioapic_no >= MAX_IOAPICS) {
  69         return -1;
  70     }
  71
  72     info = DO_UPCAST(IOAPICCommonInfo, busdev.qdev, qdev_get_info(&s->busdev.qdev));
  73     info->init(s, ioapic_no);
  74
  75     sysbus_init_mmio(&s->busdev, &s->io_memory);
  76     ioapic_no++;
  77
  78     return 0;
  79 }
  80
  81 static const VMStateDescription vmstate_ioapic_common = {
  82     .name = "ioapic",
  83     .version_id = 3,
  84     .minimum_version_id = 1,
  85     .minimum_version_id_old = 1,
  86     .pre_save = ioapic_dispatch_pre_save,
  87     .post_load = ioapic_dispatch_post_load,
  88     .fields = (VMStateField[]) {
  89         VMSTATE_UINT8(id, IOAPICCommonState),
  90         VMSTATE_UINT8(ioregsel, IOAPICCommonState),
  91         VMSTATE_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */
  92         VMSTATE_UINT32_V(irr, IOAPICCommonState, 2),
  93         VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICCommonState, IOAPIC_NUM_PINS),
  94         VMSTATE_END_OF_LIST()
  95     }
  96 };
  97
  98 void ioapic_qdev_register(IOAPICCommonInfo *info)
  99 {
 100     info->busdev.init = ioapic_init_common;
 101     info->busdev.qdev.vmsd = &vmstate_ioapic_common;
 102     info->busdev.qdev.no_user = 1;
 103     sysbus_register_withprop(&info->busdev);
 104 }