From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/hw/timer/stm32f2xx_timer.c | 328 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 328 insertions(+) create mode 100644 qemu/hw/timer/stm32f2xx_timer.c (limited to 'qemu/hw/timer/stm32f2xx_timer.c') diff --git a/qemu/hw/timer/stm32f2xx_timer.c b/qemu/hw/timer/stm32f2xx_timer.c new file mode 100644 index 000000000..ecadf9df8 --- /dev/null +++ b/qemu/hw/timer/stm32f2xx_timer.c @@ -0,0 +1,328 @@ +/* + * STM32F2XX Timer + * + * Copyright (c) 2014 Alistair Francis + * + * 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/timer/stm32f2xx_timer.h" + +#ifndef STM_TIMER_ERR_DEBUG +#define STM_TIMER_ERR_DEBUG 0 +#endif + +#define DB_PRINT_L(lvl, fmt, args...) do { \ + if (STM_TIMER_ERR_DEBUG >= lvl) { \ + qemu_log("%s: " fmt, __func__, ## args); \ + } \ +} while (0); + +#define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args) + +static void stm32f2xx_timer_set_alarm(STM32F2XXTimerState *s, int64_t now); + +static void stm32f2xx_timer_interrupt(void *opaque) +{ + STM32F2XXTimerState *s = opaque; + + DB_PRINT("Interrupt\n"); + + if (s->tim_dier & TIM_DIER_UIE && s->tim_cr1 & TIM_CR1_CEN) { + s->tim_sr |= 1; + qemu_irq_pulse(s->irq); + stm32f2xx_timer_set_alarm(s, s->hit_time); + } +} + +static inline int64_t stm32f2xx_ns_to_ticks(STM32F2XXTimerState *s, int64_t t) +{ + return muldiv64(t, s->freq_hz, 1000000000ULL) / (s->tim_psc + 1); +} + +static void stm32f2xx_timer_set_alarm(STM32F2XXTimerState *s, int64_t now) +{ + uint64_t ticks; + int64_t now_ticks; + + if (s->tim_arr == 0) { + return; + } + + DB_PRINT("Alarm set at: 0x%x\n", s->tim_cr1); + + now_ticks = stm32f2xx_ns_to_ticks(s, now); + ticks = s->tim_arr - (now_ticks - s->tick_offset); + + DB_PRINT("Alarm set in %d ticks\n", (int) ticks); + + s->hit_time = muldiv64((ticks + (uint64_t) now_ticks) * (s->tim_psc + 1), + 1000000000ULL, s->freq_hz); + + timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->hit_time); + DB_PRINT("Wait Time: %" PRId64 " ticks\n", s->hit_time); +} + +static void stm32f2xx_timer_reset(DeviceState *dev) +{ + STM32F2XXTimerState *s = STM32F2XXTIMER(dev); + int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + + s->tim_cr1 = 0; + s->tim_cr2 = 0; + s->tim_smcr = 0; + s->tim_dier = 0; + s->tim_sr = 0; + s->tim_egr = 0; + s->tim_ccmr1 = 0; + s->tim_ccmr2 = 0; + s->tim_ccer = 0; + s->tim_psc = 0; + s->tim_arr = 0; + s->tim_ccr1 = 0; + s->tim_ccr2 = 0; + s->tim_ccr3 = 0; + s->tim_ccr4 = 0; + s->tim_dcr = 0; + s->tim_dmar = 0; + s->tim_or = 0; + + s->tick_offset = stm32f2xx_ns_to_ticks(s, now); +} + +static uint64_t stm32f2xx_timer_read(void *opaque, hwaddr offset, + unsigned size) +{ + STM32F2XXTimerState *s = opaque; + + DB_PRINT("Read 0x%"HWADDR_PRIx"\n", offset); + + switch (offset) { + case TIM_CR1: + return s->tim_cr1; + case TIM_CR2: + return s->tim_cr2; + case TIM_SMCR: + return s->tim_smcr; + case TIM_DIER: + return s->tim_dier; + case TIM_SR: + return s->tim_sr; + case TIM_EGR: + return s->tim_egr; + case TIM_CCMR1: + return s->tim_ccmr1; + case TIM_CCMR2: + return s->tim_ccmr2; + case TIM_CCER: + return s->tim_ccer; + case TIM_CNT: + return stm32f2xx_ns_to_ticks(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) - + s->tick_offset; + case TIM_PSC: + return s->tim_psc; + case TIM_ARR: + return s->tim_arr; + case TIM_CCR1: + return s->tim_ccr1; + case TIM_CCR2: + return s->tim_ccr2; + case TIM_CCR3: + return s->tim_ccr3; + case TIM_CCR4: + return s->tim_ccr4; + case TIM_DCR: + return s->tim_dcr; + case TIM_DMAR: + return s->tim_dmar; + case TIM_OR: + return s->tim_or; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, offset); + } + + return 0; +} + +static void stm32f2xx_timer_write(void *opaque, hwaddr offset, + uint64_t val64, unsigned size) +{ + STM32F2XXTimerState *s = opaque; + uint32_t value = val64; + int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + uint32_t timer_val = 0; + + DB_PRINT("Write 0x%x, 0x%"HWADDR_PRIx"\n", value, offset); + + switch (offset) { + case TIM_CR1: + s->tim_cr1 = value; + return; + case TIM_CR2: + s->tim_cr2 = value; + return; + case TIM_SMCR: + s->tim_smcr = value; + return; + case TIM_DIER: + s->tim_dier = value; + return; + case TIM_SR: + /* This is set by hardware and cleared by software */ + s->tim_sr &= value; + return; + case TIM_EGR: + s->tim_egr = value; + if (s->tim_egr & TIM_EGR_UG) { + timer_val = 0; + break; + } + return; + case TIM_CCMR1: + s->tim_ccmr1 = value; + return; + case TIM_CCMR2: + s->tim_ccmr2 = value; + return; + case TIM_CCER: + s->tim_ccer = value; + return; + case TIM_PSC: + timer_val = stm32f2xx_ns_to_ticks(s, now) - s->tick_offset; + s->tim_psc = value; + value = timer_val; + break; + case TIM_CNT: + timer_val = value; + break; + case TIM_ARR: + s->tim_arr = value; + stm32f2xx_timer_set_alarm(s, now); + return; + case TIM_CCR1: + s->tim_ccr1 = value; + return; + case TIM_CCR2: + s->tim_ccr2 = value; + return; + case TIM_CCR3: + s->tim_ccr3 = value; + return; + case TIM_CCR4: + s->tim_ccr4 = value; + return; + case TIM_DCR: + s->tim_dcr = value; + return; + case TIM_DMAR: + s->tim_dmar = value; + return; + case TIM_OR: + s->tim_or = value; + return; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, offset); + return; + } + + /* This means that a register write has affected the timer in a way that + * requires a refresh of both tick_offset and the alarm. + */ + s->tick_offset = stm32f2xx_ns_to_ticks(s, now) - timer_val; + stm32f2xx_timer_set_alarm(s, now); +} + +static const MemoryRegionOps stm32f2xx_timer_ops = { + .read = stm32f2xx_timer_read, + .write = stm32f2xx_timer_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static const VMStateDescription vmstate_stm32f2xx_timer = { + .name = TYPE_STM32F2XX_TIMER, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_INT64(tick_offset, STM32F2XXTimerState), + VMSTATE_UINT32(tim_cr1, STM32F2XXTimerState), + VMSTATE_UINT32(tim_cr2, STM32F2XXTimerState), + VMSTATE_UINT32(tim_smcr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_dier, STM32F2XXTimerState), + VMSTATE_UINT32(tim_sr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_egr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccmr1, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccmr2, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccer, STM32F2XXTimerState), + VMSTATE_UINT32(tim_psc, STM32F2XXTimerState), + VMSTATE_UINT32(tim_arr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr1, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr2, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr3, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr4, STM32F2XXTimerState), + VMSTATE_UINT32(tim_dcr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_dmar, STM32F2XXTimerState), + VMSTATE_UINT32(tim_or, STM32F2XXTimerState), + VMSTATE_END_OF_LIST() + } +}; + +static Property stm32f2xx_timer_properties[] = { + DEFINE_PROP_UINT64("clock-frequency", struct STM32F2XXTimerState, + freq_hz, 1000000000), + DEFINE_PROP_END_OF_LIST(), +}; + +static void stm32f2xx_timer_init(Object *obj) +{ + STM32F2XXTimerState *s = STM32F2XXTIMER(obj); + + sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); + + memory_region_init_io(&s->iomem, obj, &stm32f2xx_timer_ops, s, + "stm32f2xx_timer", 0x4000); + sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem); + + s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, stm32f2xx_timer_interrupt, s); +} + +static void stm32f2xx_timer_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->reset = stm32f2xx_timer_reset; + dc->props = stm32f2xx_timer_properties; + dc->vmsd = &vmstate_stm32f2xx_timer; +} + +static const TypeInfo stm32f2xx_timer_info = { + .name = TYPE_STM32F2XX_TIMER, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(STM32F2XXTimerState), + .instance_init = stm32f2xx_timer_init, + .class_init = stm32f2xx_timer_class_init, +}; + +static void stm32f2xx_timer_register_types(void) +{ + type_register_static(&stm32f2xx_timer_info); +} + +type_init(stm32f2xx_timer_register_types) -- cgit 1.2.3-korg