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qemu/hw/timer/hpet.c
Peter Maydell e3d0814368 hw: Use device_class_set_legacy_reset() instead of opencoding 
Use device_class_set_legacy_reset() instead of opencoding an
assignment to DeviceClass::reset. This change was produced
with:
 spatch --macro-file scripts/cocci-macro-file.h \
    --sp-file scripts/coccinelle/device-reset.cocci \
    --keep-comments --smpl-spacing --in-place --dir hw

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240830145812.1967042-8-peter.maydell@linaro.org
2024-09-13 15:31:44 +01:00

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/*
* High Precision Event Timer emulation
*
* Copyright (c) 2007 Alexander Graf
* Copyright (c) 2008 IBM Corporation
*
* Authors: Beth Kon <bkon@us.ibm.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* *****************************************************************
*
* This driver attempts to emulate an HPET device in software.
*/
#include "qemu/osdep.h"
#include "hw/irq.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/timer.h"
#include "hw/qdev-properties.h"
#include "hw/timer/hpet.h"
#include "hw/sysbus.h"
#include "hw/rtc/mc146818rtc.h"
#include "hw/rtc/mc146818rtc_regs.h"
#include "migration/vmstate.h"
#include "hw/timer/i8254.h"
#include "exec/address-spaces.h"
#include "qom/object.h"
#include "trace.h"
#define HPET_MSI_SUPPORT 0
OBJECT_DECLARE_SIMPLE_TYPE(HPETState, HPET)
struct HPETState;
typedef struct HPETTimer { /* timers */
uint8_t tn; /*timer number*/
QEMUTimer *qemu_timer;
struct HPETState *state;
/* Memory-mapped, software visible timer registers */
uint64_t config; /* configuration/cap */
uint64_t cmp; /* comparator */
uint64_t fsb; /* FSB route */
/* Hidden register state */
uint64_t cmp64; /* comparator (extended to counter width) */
uint64_t period; /* Last value written to comparator */
uint8_t wrap_flag; /* timer pop will indicate wrap for one-shot 32-bit
* mode. Next pop will be actual timer expiration.
*/
uint64_t last; /* last value armed, to avoid timer storms */
} HPETTimer;
struct HPETState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
MemoryRegion iomem;
uint64_t hpet_offset;
bool hpet_offset_saved;
qemu_irq irqs[HPET_NUM_IRQ_ROUTES];
uint32_t flags;
uint8_t rtc_irq_level;
qemu_irq pit_enabled;
uint8_t num_timers;
uint32_t intcap;
HPETTimer timer[HPET_MAX_TIMERS];
/* Memory-mapped, software visible registers */
uint64_t capability; /* capabilities */
uint64_t config; /* configuration */
uint64_t isr; /* interrupt status reg */
uint64_t hpet_counter; /* main counter */
uint8_t hpet_id; /* instance id */
};
static uint32_t hpet_in_legacy_mode(HPETState *s)
{
return s->config & HPET_CFG_LEGACY;
}
static uint32_t timer_int_route(struct HPETTimer *timer)
{
return (timer->config & HPET_TN_INT_ROUTE_MASK) >> HPET_TN_INT_ROUTE_SHIFT;
}
static uint32_t timer_fsb_route(HPETTimer *t)
{
return t->config & HPET_TN_FSB_ENABLE;
}
static uint32_t hpet_enabled(HPETState *s)
{
return s->config & HPET_CFG_ENABLE;
}
static uint32_t timer_is_periodic(HPETTimer *t)
{
return t->config & HPET_TN_PERIODIC;
}
static uint32_t timer_enabled(HPETTimer *t)
{
return t->config & HPET_TN_ENABLE;
}
static uint32_t hpet_time_after(uint64_t a, uint64_t b)
{
return ((int64_t)(b - a) < 0);
}
static uint64_t ticks_to_ns(uint64_t value)
{
return value * HPET_CLK_PERIOD;
}
static uint64_t ns_to_ticks(uint64_t value)
{
return value / HPET_CLK_PERIOD;
}
static uint64_t hpet_fixup_reg(uint64_t new, uint64_t old, uint64_t mask)
{
new &= mask;
new |= old & ~mask;
return new;
}
static int activating_bit(uint64_t old, uint64_t new, uint64_t mask)
{
return (!(old & mask) && (new & mask));
}
static int deactivating_bit(uint64_t old, uint64_t new, uint64_t mask)
{
return ((old & mask) && !(new & mask));
}
static uint64_t hpet_get_ticks(HPETState *s)
{
return ns_to_ticks(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->hpet_offset);
}
static uint64_t hpet_get_ns(HPETState *s, uint64_t tick)
{
return ticks_to_ns(tick) - s->hpet_offset;
}
/*
* calculate next value of the general counter that matches the
* target (either entirely, or the low 32-bit only depending on
* the timer mode).
*/
static uint64_t hpet_calculate_cmp64(HPETTimer *t, uint64_t cur_tick, uint64_t target)
{
if (t->config & HPET_TN_32BIT) {
uint64_t result = deposit64(cur_tick, 0, 32, target);
if (result < cur_tick) {
result += 0x100000000ULL;
}
return result;
} else {
return target;
}
}
static uint64_t hpet_next_wrap(uint64_t cur_tick)
{
return (cur_tick | 0xffffffffU) + 1;
}
static void update_irq(struct HPETTimer *timer, int set)
{
uint64_t mask;
HPETState *s;
int route;
if (timer->tn <= 1 && hpet_in_legacy_mode(timer->state)) {
/* if LegacyReplacementRoute bit is set, HPET specification requires
* timer0 be routed to IRQ0 in NON-APIC or IRQ2 in the I/O APIC,
* timer1 be routed to IRQ8 in NON-APIC or IRQ8 in the I/O APIC.
*/
route = (timer->tn == 0) ? 0 : RTC_ISA_IRQ;
} else {
route = timer_int_route(timer);
}
s = timer->state;
mask = 1 << timer->tn;
if (set && (timer->config & HPET_TN_TYPE_LEVEL)) {
/*
* If HPET_TN_ENABLE bit is 0, "the timer will still operate and
* generate appropriate status bits, but will not cause an interrupt"
*/
s->isr |= mask;
} else {
s->isr &= ~mask;
}
if (set && timer_enabled(timer) && hpet_enabled(s)) {
if (timer_fsb_route(timer)) {
address_space_stl_le(&address_space_memory, timer->fsb >> 32,
timer->fsb & 0xffffffff, MEMTXATTRS_UNSPECIFIED,
NULL);
} else if (timer->config & HPET_TN_TYPE_LEVEL) {
qemu_irq_raise(s->irqs[route]);
} else {
qemu_irq_pulse(s->irqs[route]);
}
} else {
if (!timer_fsb_route(timer)) {
qemu_irq_lower(s->irqs[route]);
}
}
}
static int hpet_pre_save(void *opaque)
{
HPETState *s = opaque;
/* save current counter value */
if (hpet_enabled(s)) {
s->hpet_counter = hpet_get_ticks(s);
}
return 0;
}
static int hpet_pre_load(void *opaque)
{
HPETState *s = opaque;
/* version 1 only supports 3, later versions will load the actual value */
s->num_timers = HPET_MIN_TIMERS;
return 0;
}
static bool hpet_validate_num_timers(void *opaque, int version_id)
{
HPETState *s = opaque;
if (s->num_timers < HPET_MIN_TIMERS) {
return false;
} else if (s->num_timers > HPET_MAX_TIMERS) {
return false;
}
return true;
}
static int hpet_post_load(void *opaque, int version_id)
{
HPETState *s = opaque;
int i;
for (i = 0; i < s->num_timers; i++) {
HPETTimer *t = &s->timer[i];
t->cmp64 = hpet_calculate_cmp64(t, s->hpet_counter, t->cmp);
t->last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - NANOSECONDS_PER_SECOND;
}
/* Recalculate the offset between the main counter and guest time */
if (!s->hpet_offset_saved) {
s->hpet_offset = ticks_to_ns(s->hpet_counter)
- qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
}
/* Push number of timers into capability returned via HPET_ID */
s->capability &= ~HPET_ID_NUM_TIM_MASK;
s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT;
hpet_cfg.hpet[s->hpet_id].event_timer_block_id = (uint32_t)s->capability;
/* Derive HPET_MSI_SUPPORT from the capability of the first timer. */
s->flags &= ~(1 << HPET_MSI_SUPPORT);
if (s->timer[0].config & HPET_TN_FSB_CAP) {
s->flags |= 1 << HPET_MSI_SUPPORT;
}
return 0;
}
static bool hpet_offset_needed(void *opaque)
{
HPETState *s = opaque;
return hpet_enabled(s) && s->hpet_offset_saved;
}
static bool hpet_rtc_irq_level_needed(void *opaque)
{
HPETState *s = opaque;
return s->rtc_irq_level != 0;
}
static const VMStateDescription vmstate_hpet_rtc_irq_level = {
.name = "hpet/rtc_irq_level",
.version_id = 1,
.minimum_version_id = 1,
.needed = hpet_rtc_irq_level_needed,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(rtc_irq_level, HPETState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_hpet_offset = {
.name = "hpet/offset",
.version_id = 1,
.minimum_version_id = 1,
.needed = hpet_offset_needed,
.fields = (const VMStateField[]) {
VMSTATE_UINT64(hpet_offset, HPETState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_hpet_timer = {
.name = "hpet_timer",
.version_id = 1,
.minimum_version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(tn, HPETTimer),
VMSTATE_UINT64(config, HPETTimer),
VMSTATE_UINT64(cmp, HPETTimer),
VMSTATE_UINT64(fsb, HPETTimer),
VMSTATE_UINT64(period, HPETTimer),
VMSTATE_UINT8(wrap_flag, HPETTimer),
VMSTATE_TIMER_PTR(qemu_timer, HPETTimer),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_hpet = {
.name = "hpet",
.version_id = 2,
.minimum_version_id = 1,
.pre_save = hpet_pre_save,
.pre_load = hpet_pre_load,
.post_load = hpet_post_load,
.fields = (const VMStateField[]) {
VMSTATE_UINT64(config, HPETState),
VMSTATE_UINT64(isr, HPETState),
VMSTATE_UINT64(hpet_counter, HPETState),
VMSTATE_UINT8_V(num_timers, HPETState, 2),
VMSTATE_VALIDATE("num_timers in range", hpet_validate_num_timers),
VMSTATE_STRUCT_VARRAY_UINT8(timer, HPETState, num_timers, 0,
vmstate_hpet_timer, HPETTimer),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * const []) {
&vmstate_hpet_rtc_irq_level,
&vmstate_hpet_offset,
NULL
}
};
static void hpet_arm(HPETTimer *t, uint64_t tick)
{
uint64_t ns = hpet_get_ns(t->state, tick);
/* Clamp period to reasonable min value (1 us) */
if (timer_is_periodic(t) && ns - t->last < 1000) {
ns = t->last + 1000;
}
t->last = ns;
timer_mod(t->qemu_timer, ns);
}
/*
* timer expiration callback
*/
static void hpet_timer(void *opaque)
{
HPETTimer *t = opaque;
uint64_t period = t->period;
uint64_t cur_tick = hpet_get_ticks(t->state);
if (timer_is_periodic(t) && period != 0) {
while (hpet_time_after(cur_tick, t->cmp64)) {
t->cmp64 += period;
}
if (t->config & HPET_TN_32BIT) {
t->cmp = (uint32_t)t->cmp64;
} else {
t->cmp = t->cmp64;
}
hpet_arm(t, t->cmp64);
} else if (t->wrap_flag) {
t->wrap_flag = 0;
hpet_arm(t, t->cmp64);
}
update_irq(t, 1);
}
static void hpet_set_timer(HPETTimer *t)
{
uint64_t cur_tick = hpet_get_ticks(t->state);
t->wrap_flag = 0;
t->cmp64 = hpet_calculate_cmp64(t, cur_tick, t->cmp);
if (t->config & HPET_TN_32BIT) {
/* hpet spec says in one-shot 32-bit mode, generate an interrupt when
* counter wraps in addition to an interrupt with comparator match.
*/
if (!timer_is_periodic(t) && t->cmp64 > hpet_next_wrap(cur_tick)) {
t->wrap_flag = 1;
hpet_arm(t, hpet_next_wrap(cur_tick));
return;
}
}
hpet_arm(t, t->cmp64);
}
static void hpet_del_timer(HPETTimer *t)
{
HPETState *s = t->state;
timer_del(t->qemu_timer);
if (s->isr & (1 << t->tn)) {
/* For level-triggered interrupt, this leaves ISR set but lowers irq. */
update_irq(t, 1);
}
}
static uint64_t hpet_ram_read(void *opaque, hwaddr addr,
unsigned size)
{
HPETState *s = opaque;
int shift = (addr & 4) * 8;
uint64_t cur_tick;
trace_hpet_ram_read(addr);
/*address range of all TN regs*/
if (addr >= 0x100 && addr <= 0x3ff) {
uint8_t timer_id = (addr - 0x100) / 0x20;
HPETTimer *timer = &s->timer[timer_id];
if (timer_id > s->num_timers) {
trace_hpet_timer_id_out_of_range(timer_id);
return 0;
}
switch (addr & 0x18) {
case HPET_TN_CFG: // including interrupt capabilities
return timer->config >> shift;
case HPET_TN_CMP: // comparator register
return timer->cmp >> shift;
case HPET_TN_ROUTE:
return timer->fsb >> shift;
default:
trace_hpet_ram_read_invalid();
break;
}
} else {
switch (addr & ~4) {
case HPET_ID: // including HPET_PERIOD
return s->capability >> shift;
case HPET_CFG:
return s->config >> shift;
case HPET_COUNTER:
if (hpet_enabled(s)) {
cur_tick = hpet_get_ticks(s);
} else {
cur_tick = s->hpet_counter;
}
trace_hpet_ram_read_reading_counter(addr & 4, cur_tick);
return cur_tick >> shift;
case HPET_STATUS:
return s->isr >> shift;
default:
trace_hpet_ram_read_invalid();
break;
}
}
return 0;
}
static void hpet_ram_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
int i;
HPETState *s = opaque;
int shift = (addr & 4) * 8;
int len = MIN(size * 8, 64 - shift);
uint64_t old_val, new_val, cleared;
trace_hpet_ram_write(addr, value);
/*address range of all TN regs*/
if (addr >= 0x100 && addr <= 0x3ff) {
uint8_t timer_id = (addr - 0x100) / 0x20;
HPETTimer *timer = &s->timer[timer_id];
trace_hpet_ram_write_timer_id(timer_id);
if (timer_id > s->num_timers) {
trace_hpet_timer_id_out_of_range(timer_id);
return;
}
switch (addr & 0x18) {
case HPET_TN_CFG:
trace_hpet_ram_write_tn_cfg(addr & 4);
old_val = timer->config;
new_val = deposit64(old_val, shift, len, value);
new_val = hpet_fixup_reg(new_val, old_val, HPET_TN_CFG_WRITE_MASK);
if (deactivating_bit(old_val, new_val, HPET_TN_TYPE_LEVEL)) {
/*
* Do this before changing timer->config; otherwise, if
* HPET_TN_FSB is set, update_irq will not lower the qemu_irq.
*/
update_irq(timer, 0);
}
timer->config = new_val;
if (activating_bit(old_val, new_val, HPET_TN_ENABLE)
&& (s->isr & (1 << timer_id))) {
update_irq(timer, 1);
}
if (new_val & HPET_TN_32BIT) {
timer->cmp = (uint32_t)timer->cmp;
timer->period = (uint32_t)timer->period;
}
if (hpet_enabled(s)) {
hpet_set_timer(timer);
}
break;
case HPET_TN_CMP: // comparator register
if (timer->config & HPET_TN_32BIT) {
/* High 32-bits are zero, leave them untouched. */
if (shift) {
trace_hpet_ram_write_invalid_tn_cmp();
break;
}
len = 64;
value = (uint32_t) value;
}
trace_hpet_ram_write_tn_cmp(addr & 4);
if (!timer_is_periodic(timer)
|| (timer->config & HPET_TN_SETVAL)) {
timer->cmp = deposit64(timer->cmp, shift, len, value);
}
if (timer_is_periodic(timer)) {
timer->period = deposit64(timer->period, shift, len, value);
}
timer->config &= ~HPET_TN_SETVAL;
if (hpet_enabled(s)) {
hpet_set_timer(timer);
}
break;
case HPET_TN_ROUTE:
timer->fsb = deposit64(timer->fsb, shift, len, value);
break;
default:
trace_hpet_ram_write_invalid();
break;
}
return;
} else {
switch (addr & ~4) {
case HPET_ID:
return;
case HPET_CFG:
old_val = s->config;
new_val = deposit64(old_val, shift, len, value);
new_val = hpet_fixup_reg(new_val, old_val, HPET_CFG_WRITE_MASK);
s->config = new_val;
if (activating_bit(old_val, new_val, HPET_CFG_ENABLE)) {
/* Enable main counter and interrupt generation. */
s->hpet_offset =
ticks_to_ns(s->hpet_counter) - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
for (i = 0; i < s->num_timers; i++) {
if (timer_enabled(&s->timer[i]) && (s->isr & (1 << i))) {
update_irq(&s->timer[i], 1);
}
hpet_set_timer(&s->timer[i]);
}
} else if (deactivating_bit(old_val, new_val, HPET_CFG_ENABLE)) {
/* Halt main counter and disable interrupt generation. */
s->hpet_counter = hpet_get_ticks(s);
for (i = 0; i < s->num_timers; i++) {
hpet_del_timer(&s->timer[i]);
}
}
/* i8254 and RTC output pins are disabled
* when HPET is in legacy mode */
if (activating_bit(old_val, new_val, HPET_CFG_LEGACY)) {
qemu_set_irq(s->pit_enabled, 0);
qemu_irq_lower(s->irqs[0]);
qemu_irq_lower(s->irqs[RTC_ISA_IRQ]);
} else if (deactivating_bit(old_val, new_val, HPET_CFG_LEGACY)) {
qemu_irq_lower(s->irqs[0]);
qemu_set_irq(s->pit_enabled, 1);
qemu_set_irq(s->irqs[RTC_ISA_IRQ], s->rtc_irq_level);
}
break;
case HPET_STATUS:
new_val = value << shift;
cleared = new_val & s->isr;
for (i = 0; i < s->num_timers; i++) {
if (cleared & (1 << i)) {
update_irq(&s->timer[i], 0);
}
}
break;
case HPET_COUNTER:
if (hpet_enabled(s)) {
trace_hpet_ram_write_counter_write_while_enabled();
}
s->hpet_counter = deposit64(s->hpet_counter, shift, len, value);
break;
default:
trace_hpet_ram_write_invalid();
break;
}
}
}
static const MemoryRegionOps hpet_ram_ops = {
.read = hpet_ram_read,
.write = hpet_ram_write,
.valid = {
.min_access_size = 4,
.max_access_size = 8,
},
.impl = {
.min_access_size = 4,
.max_access_size = 8,
},
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void hpet_reset(DeviceState *d)
{
HPETState *s = HPET(d);
SysBusDevice *sbd = SYS_BUS_DEVICE(d);
int i;
for (i = 0; i < s->num_timers; i++) {
HPETTimer *timer = &s->timer[i];
hpet_del_timer(timer);
timer->cmp = ~0ULL;
timer->config = HPET_TN_PERIODIC_CAP | HPET_TN_SIZE_CAP;
if (s->flags & (1 << HPET_MSI_SUPPORT)) {
timer->config |= HPET_TN_FSB_CAP;
}
/* advertise availability of ioapic int */
timer->config |= (uint64_t)s->intcap << 32;
timer->period = 0ULL;
timer->wrap_flag = 0;
}
qemu_set_irq(s->pit_enabled, 1);
s->hpet_counter = 0ULL;
s->hpet_offset = 0ULL;
s->config = 0ULL;
hpet_cfg.hpet[s->hpet_id].event_timer_block_id = (uint32_t)s->capability;
hpet_cfg.hpet[s->hpet_id].address = sbd->mmio[0].addr;
/* to document that the RTC lowers its output on reset as well */
s->rtc_irq_level = 0;
}
static void hpet_handle_legacy_irq(void *opaque, int n, int level)
{
HPETState *s = HPET(opaque);
if (n == HPET_LEGACY_PIT_INT) {
if (!hpet_in_legacy_mode(s)) {
qemu_set_irq(s->irqs[0], level);
}
} else {
s->rtc_irq_level = level;
if (!hpet_in_legacy_mode(s)) {
qemu_set_irq(s->irqs[RTC_ISA_IRQ], level);
}
}
}
static void hpet_init(Object *obj)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
HPETState *s = HPET(obj);
/* HPET Area */
memory_region_init_io(&s->iomem, obj, &hpet_ram_ops, s, "hpet", HPET_LEN);
sysbus_init_mmio(sbd, &s->iomem);
}
static void hpet_realize(DeviceState *dev, Error **errp)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
HPETState *s = HPET(dev);
int i;
HPETTimer *timer;
if (!s->intcap) {
warn_report("Hpet's intcap not initialized");
}
if (hpet_cfg.count == UINT8_MAX) {
/* first instance */
hpet_cfg.count = 0;
}
if (hpet_cfg.count == 8) {
error_setg(errp, "Only 8 instances of HPET is allowed");
return;
}
s->hpet_id = hpet_cfg.count++;
for (i = 0; i < HPET_NUM_IRQ_ROUTES; i++) {
sysbus_init_irq(sbd, &s->irqs[i]);
}
if (s->num_timers < HPET_MIN_TIMERS) {
s->num_timers = HPET_MIN_TIMERS;
} else if (s->num_timers > HPET_MAX_TIMERS) {
s->num_timers = HPET_MAX_TIMERS;
}
for (i = 0; i < HPET_MAX_TIMERS; i++) {
timer = &s->timer[i];
timer->qemu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, hpet_timer, timer);
timer->tn = i;
timer->state = s;
}
/* 64-bit main counter; LegacyReplacementRoute. */
s->capability = 0x8086a001ULL;
s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT;
s->capability |= ((uint64_t)(HPET_CLK_PERIOD * FS_PER_NS) << 32);
qdev_init_gpio_in(dev, hpet_handle_legacy_irq, 2);
qdev_init_gpio_out(dev, &s->pit_enabled, 1);
}
static Property hpet_device_properties[] = {
DEFINE_PROP_UINT8("timers", HPETState, num_timers, HPET_MIN_TIMERS),
DEFINE_PROP_BIT("msi", HPETState, flags, HPET_MSI_SUPPORT, false),
DEFINE_PROP_UINT32(HPET_INTCAP, HPETState, intcap, 0),
DEFINE_PROP_BOOL("hpet-offset-saved", HPETState, hpet_offset_saved, true),
DEFINE_PROP_END_OF_LIST(),
};
static void hpet_device_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = hpet_realize;
device_class_set_legacy_reset(dc, hpet_reset);
dc->vmsd = &vmstate_hpet;
device_class_set_props(dc, hpet_device_properties);
}
static const TypeInfo hpet_device_info = {
.name = TYPE_HPET,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(HPETState),
.instance_init = hpet_init,
.class_init = hpet_device_class_init,
};
static void hpet_register_types(void)
{
type_register_static(&hpet_device_info);
}
type_init(hpet_register_types)
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