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-rw-r--r--hw/timer/meson.build1
-rw-r--r--hw/timer/npcm7xx_timer.c543
-rw-r--r--hw/timer/trace-events5
-rw-r--r--include/hw/timer/npcm7xx_timer.h78
4 files changed, 627 insertions, 0 deletions
diff --git a/hw/timer/meson.build b/hw/timer/meson.build
index 9f0a267c83..be343f68fe 100644
--- a/hw/timer/meson.build
+++ b/hw/timer/meson.build
@@ -23,6 +23,7 @@ softmmu_ss.add(when: 'CONFIG_LM32', if_true: files('lm32_timer.c'))
softmmu_ss.add(when: 'CONFIG_MILKYMIST', if_true: files('milkymist-sysctl.c'))
softmmu_ss.add(when: 'CONFIG_MIPS_CPS', if_true: files('mips_gictimer.c'))
softmmu_ss.add(when: 'CONFIG_MSF2', if_true: files('mss-timer.c'))
+softmmu_ss.add(when: 'CONFIG_NPCM7XX', if_true: files('npcm7xx_timer.c'))
softmmu_ss.add(when: 'CONFIG_NRF51_SOC', if_true: files('nrf51_timer.c'))
softmmu_ss.add(when: 'CONFIG_OMAP', if_true: files('omap_gptimer.c'))
softmmu_ss.add(when: 'CONFIG_OMAP', if_true: files('omap_synctimer.c'))
diff --git a/hw/timer/npcm7xx_timer.c b/hw/timer/npcm7xx_timer.c
new file mode 100644
index 0000000000..5703e43d40
--- /dev/null
+++ b/hw/timer/npcm7xx_timer.c
@@ -0,0 +1,543 @@
+/*
+ * Nuvoton NPCM7xx Timer Controller
+ *
+ * Copyright 2020 Google LLC
+ *
+ * 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.
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/irq.h"
+#include "hw/misc/npcm7xx_clk.h"
+#include "hw/timer/npcm7xx_timer.h"
+#include "migration/vmstate.h"
+#include "qemu/bitops.h"
+#include "qemu/error-report.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "qemu/timer.h"
+#include "qemu/units.h"
+#include "trace.h"
+
+/* 32-bit register indices. */
+enum NPCM7xxTimerRegisters {
+ NPCM7XX_TIMER_TCSR0,
+ NPCM7XX_TIMER_TCSR1,
+ NPCM7XX_TIMER_TICR0,
+ NPCM7XX_TIMER_TICR1,
+ NPCM7XX_TIMER_TDR0,
+ NPCM7XX_TIMER_TDR1,
+ NPCM7XX_TIMER_TISR,
+ NPCM7XX_TIMER_WTCR,
+ NPCM7XX_TIMER_TCSR2,
+ NPCM7XX_TIMER_TCSR3,
+ NPCM7XX_TIMER_TICR2,
+ NPCM7XX_TIMER_TICR3,
+ NPCM7XX_TIMER_TDR2,
+ NPCM7XX_TIMER_TDR3,
+ NPCM7XX_TIMER_TCSR4 = 0x0040 / sizeof(uint32_t),
+ NPCM7XX_TIMER_TICR4 = 0x0048 / sizeof(uint32_t),
+ NPCM7XX_TIMER_TDR4 = 0x0050 / sizeof(uint32_t),
+ NPCM7XX_TIMER_REGS_END,
+};
+
+/* Register field definitions. */
+#define NPCM7XX_TCSR_CEN BIT(30)
+#define NPCM7XX_TCSR_IE BIT(29)
+#define NPCM7XX_TCSR_PERIODIC BIT(27)
+#define NPCM7XX_TCSR_CRST BIT(26)
+#define NPCM7XX_TCSR_CACT BIT(25)
+#define NPCM7XX_TCSR_RSVD 0x01ffff00
+#define NPCM7XX_TCSR_PRESCALE_START 0
+#define NPCM7XX_TCSR_PRESCALE_LEN 8
+
+/*
+ * Returns the index of timer in the tc->timer array. This can be used to
+ * locate the registers that belong to this timer.
+ */
+static int npcm7xx_timer_index(NPCM7xxTimerCtrlState *tc, NPCM7xxTimer *timer)
+{
+ int index = timer - tc->timer;
+
+ g_assert(index >= 0 && index < NPCM7XX_TIMERS_PER_CTRL);
+
+ return index;
+}
+
+/* Return the value by which to divide the reference clock rate. */
+static uint32_t npcm7xx_tcsr_prescaler(uint32_t tcsr)
+{
+ return extract32(tcsr, NPCM7XX_TCSR_PRESCALE_START,
+ NPCM7XX_TCSR_PRESCALE_LEN) + 1;
+}
+
+/* Convert a timer cycle count to a time interval in nanoseconds. */
+static int64_t npcm7xx_timer_count_to_ns(NPCM7xxTimer *t, uint32_t count)
+{
+ int64_t ns = count;
+
+ ns *= NANOSECONDS_PER_SECOND / NPCM7XX_TIMER_REF_HZ;
+ ns *= npcm7xx_tcsr_prescaler(t->tcsr);
+
+ return ns;
+}
+
+/* Convert a time interval in nanoseconds to a timer cycle count. */
+static uint32_t npcm7xx_timer_ns_to_count(NPCM7xxTimer *t, int64_t ns)
+{
+ int64_t count;
+
+ count = ns / (NANOSECONDS_PER_SECOND / NPCM7XX_TIMER_REF_HZ);
+ count /= npcm7xx_tcsr_prescaler(t->tcsr);
+
+ return count;
+}
+
+/*
+ * Raise the interrupt line if there's a pending interrupt and interrupts are
+ * enabled for this timer. If not, lower it.
+ */
+static void npcm7xx_timer_check_interrupt(NPCM7xxTimer *t)
+{
+ NPCM7xxTimerCtrlState *tc = t->ctrl;
+ int index = npcm7xx_timer_index(tc, t);
+ bool pending = (t->tcsr & NPCM7XX_TCSR_IE) && (tc->tisr & BIT(index));
+
+ qemu_set_irq(t->irq, pending);
+ trace_npcm7xx_timer_irq(DEVICE(tc)->canonical_path, index, pending);
+}
+
+/* Start or resume the timer. */
+static void npcm7xx_timer_start(NPCM7xxTimer *t)
+{
+ int64_t now;
+
+ now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+ t->expires_ns = now + t->remaining_ns;
+ timer_mod(&t->qtimer, t->expires_ns);
+}
+
+/*
+ * Called when the counter reaches zero. Sets the interrupt flag, and either
+ * restarts or disables the timer.
+ */
+static void npcm7xx_timer_reached_zero(NPCM7xxTimer *t)
+{
+ NPCM7xxTimerCtrlState *tc = t->ctrl;
+ int index = npcm7xx_timer_index(tc, t);
+
+ tc->tisr |= BIT(index);
+
+ if (t->tcsr & NPCM7XX_TCSR_PERIODIC) {
+ t->remaining_ns = npcm7xx_timer_count_to_ns(t, t->ticr);
+ if (t->tcsr & NPCM7XX_TCSR_CEN) {
+ npcm7xx_timer_start(t);
+ }
+ } else {
+ t->tcsr &= ~(NPCM7XX_TCSR_CEN | NPCM7XX_TCSR_CACT);
+ }
+
+ npcm7xx_timer_check_interrupt(t);
+}
+
+/* Stop counting. Record the time remaining so we can continue later. */
+static void npcm7xx_timer_pause(NPCM7xxTimer *t)
+{
+ int64_t now;
+
+ timer_del(&t->qtimer);
+ now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+ t->remaining_ns = t->expires_ns - now;
+ if (t->remaining_ns <= 0) {
+ npcm7xx_timer_reached_zero(t);
+ }
+}
+
+/*
+ * Restart the timer from its initial value. If the timer was enabled and stays
+ * enabled, adjust the QEMU timer according to the new count. If the timer is
+ * transitioning from disabled to enabled, the caller is expected to start the
+ * timer later.
+ */
+static void npcm7xx_timer_restart(NPCM7xxTimer *t, uint32_t old_tcsr)
+{
+ t->remaining_ns = npcm7xx_timer_count_to_ns(t, t->ticr);
+
+ if (old_tcsr & t->tcsr & NPCM7XX_TCSR_CEN) {
+ npcm7xx_timer_start(t);
+ }
+}
+
+/* Register read and write handlers */
+
+static uint32_t npcm7xx_timer_read_tdr(NPCM7xxTimer *t)
+{
+ if (t->tcsr & NPCM7XX_TCSR_CEN) {
+ int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+
+ return npcm7xx_timer_ns_to_count(t, t->expires_ns - now);
+ }
+
+ return npcm7xx_timer_ns_to_count(t, t->remaining_ns);
+}
+
+static void npcm7xx_timer_write_tcsr(NPCM7xxTimer *t, uint32_t new_tcsr)
+{
+ uint32_t old_tcsr = t->tcsr;
+ uint32_t tdr;
+
+ if (new_tcsr & NPCM7XX_TCSR_RSVD) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: reserved bits in 0x%08x ignored\n",
+ __func__, new_tcsr);
+ new_tcsr &= ~NPCM7XX_TCSR_RSVD;
+ }
+ if (new_tcsr & NPCM7XX_TCSR_CACT) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: read-only bits in 0x%08x ignored\n",
+ __func__, new_tcsr);
+ new_tcsr &= ~NPCM7XX_TCSR_CACT;
+ }
+ if ((new_tcsr & NPCM7XX_TCSR_CRST) && (new_tcsr & NPCM7XX_TCSR_CEN)) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: both CRST and CEN set; ignoring CEN.\n",
+ __func__);
+ new_tcsr &= ~NPCM7XX_TCSR_CEN;
+ }
+
+ /* Calculate the value of TDR before potentially changing the prescaler. */
+ tdr = npcm7xx_timer_read_tdr(t);
+
+ t->tcsr = (t->tcsr & NPCM7XX_TCSR_CACT) | new_tcsr;
+
+ if (npcm7xx_tcsr_prescaler(old_tcsr) != npcm7xx_tcsr_prescaler(new_tcsr)) {
+ /* Recalculate time remaining based on the current TDR value. */
+ t->remaining_ns = npcm7xx_timer_count_to_ns(t, tdr);
+ if (old_tcsr & t->tcsr & NPCM7XX_TCSR_CEN) {
+ npcm7xx_timer_start(t);
+ }
+ }
+
+ if ((old_tcsr ^ new_tcsr) & NPCM7XX_TCSR_IE) {
+ npcm7xx_timer_check_interrupt(t);
+ }
+ if (new_tcsr & NPCM7XX_TCSR_CRST) {
+ npcm7xx_timer_restart(t, old_tcsr);
+ t->tcsr &= ~NPCM7XX_TCSR_CRST;
+ }
+ if ((old_tcsr ^ new_tcsr) & NPCM7XX_TCSR_CEN) {
+ if (new_tcsr & NPCM7XX_TCSR_CEN) {
+ t->tcsr |= NPCM7XX_TCSR_CACT;
+ npcm7xx_timer_start(t);
+ } else {
+ t->tcsr &= ~NPCM7XX_TCSR_CACT;
+ npcm7xx_timer_pause(t);
+ }
+ }
+}
+
+static void npcm7xx_timer_write_ticr(NPCM7xxTimer *t, uint32_t new_ticr)
+{
+ t->ticr = new_ticr;
+
+ npcm7xx_timer_restart(t, t->tcsr);
+}
+
+static void npcm7xx_timer_write_tisr(NPCM7xxTimerCtrlState *s, uint32_t value)
+{
+ int i;
+
+ s->tisr &= ~value;
+ for (i = 0; i < ARRAY_SIZE(s->timer); i++) {
+ if (value & (1U << i)) {
+ npcm7xx_timer_check_interrupt(&s->timer[i]);
+ }
+ }
+}
+
+static hwaddr npcm7xx_tcsr_index(hwaddr reg)
+{
+ switch (reg) {
+ case NPCM7XX_TIMER_TCSR0:
+ return 0;
+ case NPCM7XX_TIMER_TCSR1:
+ return 1;
+ case NPCM7XX_TIMER_TCSR2:
+ return 2;
+ case NPCM7XX_TIMER_TCSR3:
+ return 3;
+ case NPCM7XX_TIMER_TCSR4:
+ return 4;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static hwaddr npcm7xx_ticr_index(hwaddr reg)
+{
+ switch (reg) {
+ case NPCM7XX_TIMER_TICR0:
+ return 0;
+ case NPCM7XX_TIMER_TICR1:
+ return 1;
+ case NPCM7XX_TIMER_TICR2:
+ return 2;
+ case NPCM7XX_TIMER_TICR3:
+ return 3;
+ case NPCM7XX_TIMER_TICR4:
+ return 4;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static hwaddr npcm7xx_tdr_index(hwaddr reg)
+{
+ switch (reg) {
+ case NPCM7XX_TIMER_TDR0:
+ return 0;
+ case NPCM7XX_TIMER_TDR1:
+ return 1;
+ case NPCM7XX_TIMER_TDR2:
+ return 2;
+ case NPCM7XX_TIMER_TDR3:
+ return 3;
+ case NPCM7XX_TIMER_TDR4:
+ return 4;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static uint64_t npcm7xx_timer_read(void *opaque, hwaddr offset, unsigned size)
+{
+ NPCM7xxTimerCtrlState *s = opaque;
+ uint64_t value = 0;
+ hwaddr reg;
+
+ reg = offset / sizeof(uint32_t);
+ switch (reg) {
+ case NPCM7XX_TIMER_TCSR0:
+ case NPCM7XX_TIMER_TCSR1:
+ case NPCM7XX_TIMER_TCSR2:
+ case NPCM7XX_TIMER_TCSR3:
+ case NPCM7XX_TIMER_TCSR4:
+ value = s->timer[npcm7xx_tcsr_index(reg)].tcsr;
+ break;
+
+ case NPCM7XX_TIMER_TICR0:
+ case NPCM7XX_TIMER_TICR1:
+ case NPCM7XX_TIMER_TICR2:
+ case NPCM7XX_TIMER_TICR3:
+ case NPCM7XX_TIMER_TICR4:
+ value = s->timer[npcm7xx_ticr_index(reg)].ticr;
+ break;
+
+ case NPCM7XX_TIMER_TDR0:
+ case NPCM7XX_TIMER_TDR1:
+ case NPCM7XX_TIMER_TDR2:
+ case NPCM7XX_TIMER_TDR3:
+ case NPCM7XX_TIMER_TDR4:
+ value = npcm7xx_timer_read_tdr(&s->timer[npcm7xx_tdr_index(reg)]);
+ break;
+
+ case NPCM7XX_TIMER_TISR:
+ value = s->tisr;
+ break;
+
+ case NPCM7XX_TIMER_WTCR:
+ value = s->wtcr;
+ break;
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: invalid offset 0x%04" HWADDR_PRIx "\n",
+ __func__, offset);
+ break;
+ }
+
+ trace_npcm7xx_timer_read(DEVICE(s)->canonical_path, offset, value);
+
+ return value;
+}
+
+static void npcm7xx_timer_write(void *opaque, hwaddr offset,
+ uint64_t v, unsigned size)
+{
+ uint32_t reg = offset / sizeof(uint32_t);
+ NPCM7xxTimerCtrlState *s = opaque;
+ uint32_t value = v;
+
+ trace_npcm7xx_timer_write(DEVICE(s)->canonical_path, offset, value);
+
+ switch (reg) {
+ case NPCM7XX_TIMER_TCSR0:
+ case NPCM7XX_TIMER_TCSR1:
+ case NPCM7XX_TIMER_TCSR2:
+ case NPCM7XX_TIMER_TCSR3:
+ case NPCM7XX_TIMER_TCSR4:
+ npcm7xx_timer_write_tcsr(&s->timer[npcm7xx_tcsr_index(reg)], value);
+ return;
+
+ case NPCM7XX_TIMER_TICR0:
+ case NPCM7XX_TIMER_TICR1:
+ case NPCM7XX_TIMER_TICR2:
+ case NPCM7XX_TIMER_TICR3:
+ case NPCM7XX_TIMER_TICR4:
+ npcm7xx_timer_write_ticr(&s->timer[npcm7xx_ticr_index(reg)], value);
+ return;
+
+ case NPCM7XX_TIMER_TDR0:
+ case NPCM7XX_TIMER_TDR1:
+ case NPCM7XX_TIMER_TDR2:
+ case NPCM7XX_TIMER_TDR3:
+ case NPCM7XX_TIMER_TDR4:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: register @ 0x%04" HWADDR_PRIx " is read-only\n",
+ __func__, offset);
+ return;
+
+ case NPCM7XX_TIMER_TISR:
+ npcm7xx_timer_write_tisr(s, value);
+ return;
+
+ case NPCM7XX_TIMER_WTCR:
+ qemu_log_mask(LOG_UNIMP, "%s: WTCR write not implemented: 0x%08x\n",
+ __func__, value);
+ return;
+ }
+
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: invalid offset 0x%04" HWADDR_PRIx "\n",
+ __func__, offset);
+}
+
+static const struct MemoryRegionOps npcm7xx_timer_ops = {
+ .read = npcm7xx_timer_read,
+ .write = npcm7xx_timer_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+/* Called when the QEMU timer expires. */
+static void npcm7xx_timer_expired(void *opaque)
+{
+ NPCM7xxTimer *t = opaque;
+
+ if (t->tcsr & NPCM7XX_TCSR_CEN) {
+ npcm7xx_timer_reached_zero(t);
+ }
+}
+
+static void npcm7xx_timer_enter_reset(Object *obj, ResetType type)
+{
+ NPCM7xxTimerCtrlState *s = NPCM7XX_TIMER(obj);
+ int i;
+
+ for (i = 0; i < NPCM7XX_TIMERS_PER_CTRL; i++) {
+ NPCM7xxTimer *t = &s->timer[i];
+
+ timer_del(&t->qtimer);
+ t->expires_ns = 0;
+ t->remaining_ns = 0;
+ t->tcsr = 0x00000005;
+ t->ticr = 0x00000000;
+ }
+
+ s->tisr = 0x00000000;
+ s->wtcr = 0x00000400;
+}
+
+static void npcm7xx_timer_hold_reset(Object *obj)
+{
+ NPCM7xxTimerCtrlState *s = NPCM7XX_TIMER(obj);
+ int i;
+
+ for (i = 0; i < NPCM7XX_TIMERS_PER_CTRL; i++) {
+ qemu_irq_lower(s->timer[i].irq);
+ }
+}
+
+static void npcm7xx_timer_realize(DeviceState *dev, Error **errp)
+{
+ NPCM7xxTimerCtrlState *s = NPCM7XX_TIMER(dev);
+ SysBusDevice *sbd = &s->parent;
+ int i;
+
+ for (i = 0; i < NPCM7XX_TIMERS_PER_CTRL; i++) {
+ NPCM7xxTimer *t = &s->timer[i];
+ t->ctrl = s;
+ timer_init_ns(&t->qtimer, QEMU_CLOCK_VIRTUAL, npcm7xx_timer_expired, t);
+ sysbus_init_irq(sbd, &t->irq);
+ }
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &npcm7xx_timer_ops, s,
+ TYPE_NPCM7XX_TIMER, 4 * KiB);
+ sysbus_init_mmio(sbd, &s->iomem);
+}
+
+static const VMStateDescription vmstate_npcm7xx_timer = {
+ .name = "npcm7xx-timer",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_TIMER(qtimer, NPCM7xxTimer),
+ VMSTATE_INT64(expires_ns, NPCM7xxTimer),
+ VMSTATE_INT64(remaining_ns, NPCM7xxTimer),
+ VMSTATE_UINT32(tcsr, NPCM7xxTimer),
+ VMSTATE_UINT32(ticr, NPCM7xxTimer),
+ VMSTATE_END_OF_LIST(),
+ },
+};
+
+static const VMStateDescription vmstate_npcm7xx_timer_ctrl = {
+ .name = "npcm7xx-timer-ctrl",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(tisr, NPCM7xxTimerCtrlState),
+ VMSTATE_UINT32(wtcr, NPCM7xxTimerCtrlState),
+ VMSTATE_STRUCT_ARRAY(timer, NPCM7xxTimerCtrlState,
+ NPCM7XX_TIMERS_PER_CTRL, 0, vmstate_npcm7xx_timer,
+ NPCM7xxTimer),
+ VMSTATE_END_OF_LIST(),
+ },
+};
+
+static void npcm7xx_timer_class_init(ObjectClass *klass, void *data)
+{
+ ResettableClass *rc = RESETTABLE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ QEMU_BUILD_BUG_ON(NPCM7XX_TIMER_REGS_END > NPCM7XX_TIMER_NR_REGS);
+
+ dc->desc = "NPCM7xx Timer Controller";
+ dc->realize = npcm7xx_timer_realize;
+ dc->vmsd = &vmstate_npcm7xx_timer_ctrl;
+ rc->phases.enter = npcm7xx_timer_enter_reset;
+ rc->phases.hold = npcm7xx_timer_hold_reset;
+}
+
+static const TypeInfo npcm7xx_timer_info = {
+ .name = TYPE_NPCM7XX_TIMER,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(NPCM7xxTimerCtrlState),
+ .class_init = npcm7xx_timer_class_init,
+};
+
+static void npcm7xx_timer_register_type(void)
+{
+ type_register_static(&npcm7xx_timer_info);
+}
+type_init(npcm7xx_timer_register_type);
diff --git a/hw/timer/trace-events b/hw/timer/trace-events
index 1537c3e6ec..b996d99200 100644
--- a/hw/timer/trace-events
+++ b/hw/timer/trace-events
@@ -66,6 +66,11 @@ cmsdk_apb_dualtimer_read(uint64_t offset, uint64_t data, unsigned size) "CMSDK A
cmsdk_apb_dualtimer_write(uint64_t offset, uint64_t data, unsigned size) "CMSDK APB dualtimer write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
cmsdk_apb_dualtimer_reset(void) "CMSDK APB dualtimer: reset"
+# npcm7xx_timer.c
+npcm7xx_timer_read(const char *id, uint64_t offset, uint64_t value) " %s offset: 0x%04" PRIx64 " value 0x%08" PRIx64
+npcm7xx_timer_write(const char *id, uint64_t offset, uint64_t value) "%s offset: 0x%04" PRIx64 " value 0x%08" PRIx64
+npcm7xx_timer_irq(const char *id, int timer, int state) "%s timer %d state %d"
+
# nrf51_timer.c
nrf51_timer_read(uint8_t timer_id, uint64_t addr, uint32_t value, unsigned size) "timer %u read addr 0x%" PRIx64 " data 0x%" PRIx32 " size %u"
nrf51_timer_write(uint8_t timer_id, uint64_t addr, uint32_t value, unsigned size) "timer %u write addr 0x%" PRIx64 " data 0x%" PRIx32 " size %u"
diff --git a/include/hw/timer/npcm7xx_timer.h b/include/hw/timer/npcm7xx_timer.h
new file mode 100644
index 0000000000..878a365a79
--- /dev/null
+++ b/include/hw/timer/npcm7xx_timer.h
@@ -0,0 +1,78 @@
+/*
+ * Nuvoton NPCM7xx Timer Controller
+ *
+ * Copyright 2020 Google LLC
+ *
+ * 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.
+ */
+#ifndef NPCM7XX_TIMER_H
+#define NPCM7XX_TIMER_H
+
+#include "exec/memory.h"
+#include "hw/sysbus.h"
+#include "qemu/timer.h"
+
+/* Each Timer Module (TIM) instance holds five 25 MHz timers. */
+#define NPCM7XX_TIMERS_PER_CTRL (5)
+
+/*
+ * Number of registers in our device state structure. Don't change this without
+ * incrementing the version_id in the vmstate.
+ */
+#define NPCM7XX_TIMER_NR_REGS (0x54 / sizeof(uint32_t))
+
+typedef struct NPCM7xxTimerCtrlState NPCM7xxTimerCtrlState;
+
+/**
+ * struct NPCM7xxTimer - Individual timer state.
+ * @irq: GIC interrupt line to fire on expiration (if enabled).
+ * @qtimer: QEMU timer that notifies us on expiration.
+ * @expires_ns: Absolute virtual expiration time.
+ * @remaining_ns: Remaining time until expiration if timer is paused.
+ * @tcsr: The Timer Control and Status Register.
+ * @ticr: The Timer Initial Count Register.
+ */
+typedef struct NPCM7xxTimer {
+ NPCM7xxTimerCtrlState *ctrl;
+
+ qemu_irq irq;
+ QEMUTimer qtimer;
+ int64_t expires_ns;
+ int64_t remaining_ns;
+
+ uint32_t tcsr;
+ uint32_t ticr;
+} NPCM7xxTimer;
+
+/**
+ * struct NPCM7xxTimerCtrlState - Timer Module device state.
+ * @parent: System bus device.
+ * @iomem: Memory region through which registers are accessed.
+ * @tisr: The Timer Interrupt Status Register.
+ * @wtcr: The Watchdog Timer Control Register.
+ * @timer: The five individual timers managed by this module.
+ */
+struct NPCM7xxTimerCtrlState {
+ SysBusDevice parent;
+
+ MemoryRegion iomem;
+
+ uint32_t tisr;
+ uint32_t wtcr;
+
+ NPCM7xxTimer timer[NPCM7XX_TIMERS_PER_CTRL];
+};
+
+#define TYPE_NPCM7XX_TIMER "npcm7xx-timer"
+#define NPCM7XX_TIMER(obj) \
+ OBJECT_CHECK(NPCM7xxTimerCtrlState, (obj), TYPE_NPCM7XX_TIMER)
+
+#endif /* NPCM7XX_TIMER_H */
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