244ac3af23
Split up the IOAPIC analogously to APIC and i8259. KVM will share the IOAPICCommonState, the vmstate, reset logic and certain init parts with the user space model. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
105 lines
3 KiB
C
105 lines
3 KiB
C
/*
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* IOAPIC emulation logic - common bits of emulated and KVM kernel model
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*
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* Copyright (c) 2004-2005 Fabrice Bellard
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* Copyright (c) 2009 Xiantao Zhang, Intel
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* Copyright (c) 2011 Jan Kiszka, Siemens AG
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ioapic.h"
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#include "ioapic_internal.h"
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#include "sysbus.h"
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void ioapic_reset_common(DeviceState *dev)
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{
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IOAPICCommonState *s = DO_UPCAST(IOAPICCommonState, busdev.qdev, dev);
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int i;
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s->id = 0;
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s->ioregsel = 0;
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s->irr = 0;
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for (i = 0; i < IOAPIC_NUM_PINS; i++) {
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s->ioredtbl[i] = 1 << IOAPIC_LVT_MASKED_SHIFT;
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}
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}
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static void ioapic_dispatch_pre_save(void *opaque)
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{
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IOAPICCommonState *s = opaque;
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IOAPICCommonInfo *info =
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DO_UPCAST(IOAPICCommonInfo, busdev.qdev, s->busdev.qdev.info);
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if (info->pre_save) {
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info->pre_save(s);
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}
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}
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static int ioapic_dispatch_post_load(void *opaque, int version_id)
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{
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IOAPICCommonState *s = opaque;
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IOAPICCommonInfo *info =
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DO_UPCAST(IOAPICCommonInfo, busdev.qdev, s->busdev.qdev.info);
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if (info->post_load) {
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info->post_load(s);
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}
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return 0;
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}
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static int ioapic_init_common(SysBusDevice *dev)
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{
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IOAPICCommonState *s = FROM_SYSBUS(IOAPICCommonState, dev);
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IOAPICCommonInfo *info;
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static int ioapic_no;
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if (ioapic_no >= MAX_IOAPICS) {
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return -1;
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}
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info = DO_UPCAST(IOAPICCommonInfo, busdev.qdev, s->busdev.qdev.info);
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info->init(s, ioapic_no);
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sysbus_init_mmio(&s->busdev, &s->io_memory);
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ioapic_no++;
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return 0;
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}
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static const VMStateDescription vmstate_ioapic_common = {
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.name = "ioapic",
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.version_id = 3,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.pre_save = ioapic_dispatch_pre_save,
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.post_load = ioapic_dispatch_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_UINT8(id, IOAPICCommonState),
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VMSTATE_UINT8(ioregsel, IOAPICCommonState),
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VMSTATE_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */
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VMSTATE_UINT32_V(irr, IOAPICCommonState, 2),
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VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICCommonState, IOAPIC_NUM_PINS),
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VMSTATE_END_OF_LIST()
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}
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};
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void ioapic_qdev_register(IOAPICCommonInfo *info)
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{
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info->busdev.init = ioapic_init_common;
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info->busdev.qdev.vmsd = &vmstate_ioapic_common;
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info->busdev.qdev.no_user = 1;
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sysbus_register_withprop(&info->busdev);
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}
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