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/*
* QEMU 8253/8254 interval timer emulation
*
* Copyright (c) 2003-2004 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "pc.h"
#include "isa.h"
#include "qemu-timer.h"
#include "i8254.h"
#include "qemu-kvm.h"
extern VMStateDescription vmstate_pit;
static PITState pit_state;
static void kvm_pit_pre_save(void *opaque)
{
PITState *s = (void *)opaque;
struct kvm_pit_state2 pit2;
struct kvm_pit_channel_state *c;
struct PITChannelState *sc;
int i;
if(qemu_kvm_has_pit_state2()) {
kvm_get_pit2(kvm_context, &pit2);
s->flags = pit2.flags;
} else {
/* pit2 is superset of pit struct so just cast it and use it */
kvm_get_pit(kvm_context, (struct kvm_pit_state *)&pit2);
}
for (i = 0; i < 3; i++) {
c = &pit2.channels[i];
sc = &s->channels[i];
sc->count = c->count;
sc->latched_count = c->latched_count;
sc->count_latched = c->count_latched;
sc->status_latched = c->status_latched;
sc->status = c->status;
sc->read_state = c->read_state;
sc->write_state = c->write_state;
sc->write_latch = c->write_latch;
sc->rw_mode = c->rw_mode;
sc->mode = c->mode;
sc->bcd = c->bcd;
sc->gate = c->gate;
sc->count_load_time = c->count_load_time;
}
}
static int kvm_pit_post_load(void *opaque, int version_id)
{
PITState *s = opaque;
struct kvm_pit_state2 pit2;
struct kvm_pit_channel_state *c;
struct PITChannelState *sc;
int i;
pit2.flags = s->flags;
for (i = 0; i < 3; i++) {
c = &pit2.channels[i];
sc = &s->channels[i];
c->count = sc->count;
c->latched_count = sc->latched_count;
c->count_latched = sc->count_latched;
c->status_latched = sc->status_latched;
c->status = sc->status;
c->read_state = sc->read_state;
c->write_state = sc->write_state;
c->write_latch = sc->write_latch;
c->rw_mode = sc->rw_mode;
c->mode = sc->mode;
c->bcd = sc->bcd;
c->gate = sc->gate;
c->count_load_time = sc->count_load_time;
}
if(qemu_kvm_has_pit_state2()) {
kvm_set_pit2(kvm_context, &pit2);
} else {
kvm_set_pit(kvm_context, (struct kvm_pit_state *)&pit2);
}
return 0;
}
static void dummy_timer(void *opaque)
{
}
PITState *kvm_pit_init(int base, qemu_irq irq)
{
PITState *pit = &pit_state;
PITChannelState *s;
s = &pit->channels[0];
s->irq_timer = qemu_new_timer(vm_clock, dummy_timer, s);
vmstate_pit.pre_save = kvm_pit_pre_save;
vmstate_pit.post_load = kvm_pit_post_load;
vmstate_register(NULL, base, &vmstate_pit, pit);
qemu_register_reset(pit_reset, pit);
pit_reset(pit);
return pit;
}
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