e720677e32
Old users of VMSTATE_TIMER* are mechanically changed to VMSTATE_TIMER_PTR variants. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
157 lines
4.1 KiB
C
157 lines
4.1 KiB
C
/*
|
|
* Virtual hardware watchdog.
|
|
*
|
|
* Copyright (C) 2009 Red Hat Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* By Richard W.M. Jones (rjones@redhat.com).
|
|
*/
|
|
|
|
#include "qemu-common.h"
|
|
#include "qemu/timer.h"
|
|
#include "sysemu/watchdog.h"
|
|
#include "hw/hw.h"
|
|
#include "hw/isa/isa.h"
|
|
#include "hw/i386/pc.h"
|
|
|
|
/*#define IB700_DEBUG 1*/
|
|
|
|
#ifdef IB700_DEBUG
|
|
#define ib700_debug(fs,...) \
|
|
fprintf(stderr,"ib700: %s: "fs,__func__,##__VA_ARGS__)
|
|
#else
|
|
#define ib700_debug(fs,...)
|
|
#endif
|
|
|
|
#define TYPE_IB700 "ib700"
|
|
#define IB700(obj) OBJECT_CHECK(IB700State, (obj), TYPE_IB700)
|
|
|
|
typedef struct IB700state {
|
|
ISADevice parent_obj;
|
|
|
|
QEMUTimer *timer;
|
|
|
|
PortioList port_list;
|
|
} IB700State;
|
|
|
|
/* This is the timer. We use a global here because the watchdog
|
|
* code ensures there is only one watchdog (it is located at a fixed,
|
|
* unchangeable IO port, so there could only ever be one anyway).
|
|
*/
|
|
|
|
/* A write to this register enables the timer. */
|
|
static void ib700_write_enable_reg(void *vp, uint32_t addr, uint32_t data)
|
|
{
|
|
IB700State *s = vp;
|
|
static int time_map[] = {
|
|
30, 28, 26, 24, 22, 20, 18, 16,
|
|
14, 12, 10, 8, 6, 4, 2, 0
|
|
};
|
|
int64_t timeout;
|
|
|
|
ib700_debug("addr = %x, data = %x\n", addr, data);
|
|
|
|
timeout = (int64_t) time_map[data & 0xF] * get_ticks_per_sec();
|
|
timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + timeout);
|
|
}
|
|
|
|
/* A write (of any value) to this register disables the timer. */
|
|
static void ib700_write_disable_reg(void *vp, uint32_t addr, uint32_t data)
|
|
{
|
|
IB700State *s = vp;
|
|
|
|
ib700_debug("addr = %x, data = %x\n", addr, data);
|
|
|
|
timer_del(s->timer);
|
|
}
|
|
|
|
/* This is called when the watchdog expires. */
|
|
static void ib700_timer_expired(void *vp)
|
|
{
|
|
IB700State *s = vp;
|
|
|
|
ib700_debug("watchdog expired\n");
|
|
|
|
watchdog_perform_action();
|
|
timer_del(s->timer);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_ib700 = {
|
|
.name = "ib700_wdt",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_TIMER_PTR(timer, IB700State),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const MemoryRegionPortio wdt_portio_list[] = {
|
|
{ 0x441, 2, 1, .write = ib700_write_disable_reg, },
|
|
{ 0x443, 2, 1, .write = ib700_write_enable_reg, },
|
|
PORTIO_END_OF_LIST(),
|
|
};
|
|
|
|
static void wdt_ib700_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
IB700State *s = IB700(dev);
|
|
|
|
ib700_debug("watchdog init\n");
|
|
|
|
s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, ib700_timer_expired, s);
|
|
|
|
portio_list_init(&s->port_list, OBJECT(s), wdt_portio_list, s, "ib700");
|
|
portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj), 0);
|
|
}
|
|
|
|
static void wdt_ib700_reset(DeviceState *dev)
|
|
{
|
|
IB700State *s = IB700(dev);
|
|
|
|
ib700_debug("watchdog reset\n");
|
|
|
|
timer_del(s->timer);
|
|
}
|
|
|
|
static WatchdogTimerModel model = {
|
|
.wdt_name = "ib700",
|
|
.wdt_description = "iBASE 700",
|
|
};
|
|
|
|
static void wdt_ib700_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->realize = wdt_ib700_realize;
|
|
dc->reset = wdt_ib700_reset;
|
|
dc->vmsd = &vmstate_ib700;
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
}
|
|
|
|
static const TypeInfo wdt_ib700_info = {
|
|
.name = TYPE_IB700,
|
|
.parent = TYPE_ISA_DEVICE,
|
|
.instance_size = sizeof(IB700State),
|
|
.class_init = wdt_ib700_class_init,
|
|
};
|
|
|
|
static void wdt_ib700_register_types(void)
|
|
{
|
|
watchdog_add_model(&model);
|
|
type_register_static(&wdt_ib700_info);
|
|
}
|
|
|
|
type_init(wdt_ib700_register_types)
|