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X-Received-From: 2607:f8b0:400e:c05::243 Subject: [Qemu-devel] [Qemu-devel PATCH 1/5] msf2: Add Smartfusion2 System timer X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Subbaraya Sundeep , alistair23@gmail.com, crosthwaite.peter@gmail.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Modelled System Timer in Microsemi's Smartfusion2 Soc. Timer has two 32bit down counters and two interrupts. Signed-off-by: Subbaraya Sundeep --- hw/timer/Makefile.objs | 1 + hw/timer/msf2-timer.c | 252 ++++++++++++++++++++++++++++++++++++++++++ include/hw/timer/msf2-timer.h | 85 ++++++++++++++ 3 files changed, 338 insertions(+) create mode 100644 hw/timer/msf2-timer.c create mode 100644 include/hw/timer/msf2-timer.h diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs index dd6f27e..bd1ff15 100644 --- a/hw/timer/Makefile.objs +++ b/hw/timer/Makefile.objs @@ -41,3 +41,4 @@ common-obj-$(CONFIG_STM32F2XX_TIMER) += stm32f2xx_timer.o common-obj-$(CONFIG_ASPEED_SOC) += aspeed_timer.o common-obj-$(CONFIG_SUN4V_RTC) += sun4v-rtc.o +common-obj-$(CONFIG_MSF2) += msf2-timer.o diff --git a/hw/timer/msf2-timer.c b/hw/timer/msf2-timer.c new file mode 100644 index 0000000..466faa6 --- /dev/null +++ b/hw/timer/msf2-timer.c @@ -0,0 +1,252 @@ +/* + * Timer block model of Microsemi SmartFusion2. + * + * Copyright (c) 2017 Subbaraya Sundeep . + * + * 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/msf2-timer.h" + +#ifndef MSF2_TIMER_ERR_DEBUG +#define MSF2_TIMER_ERR_DEBUG 0 +#endif + +#define DB_PRINT_L(lvl, fmt, args...) do { \ + if (MSF2_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 timer_update_irq(struct Msf2Timer *st) +{ + bool isr, ier; + + isr = !!(st->regs[R_TIM_RIS] & TIMER_RIS_ACK); + ier = !!(st->regs[R_TIM_CTRL] & TIMER_CTRL_INTR); + + qemu_set_irq(st->irq, (ier && isr)); +} + +static void timer_update(struct Msf2Timer *st) +{ + uint64_t count; + + if (!(st->regs[R_TIM_CTRL] & TIMER_CTRL_ENBL)) { + ptimer_stop(st->ptimer); + return; + } + + count = st->regs[R_TIM_LOADVAL]; + ptimer_set_limit(st->ptimer, count, 1); + ptimer_run(st->ptimer, 1); +} + +static uint64_t +timer_read(void *opaque, hwaddr addr, unsigned int size) +{ + MSF2TimerState *t = opaque; + struct Msf2Timer *st; + uint32_t ret = 0; + int timer = 0; + int isr; + int ier; + + addr >>= 2; + /* + * Two independent timers has same base address. + * Based on addr passed figure out which timer is being used. + */ + if (addr >= R_TIM1_MAX) { + timer = 1; + addr -= R_TIM1_MAX; + } + + st = &t->timers[timer]; + + switch (addr) { + case R_TIM_VAL: + ret = ptimer_get_count(st->ptimer); + break; + + case R_TIM_MIS: + isr = !!(st->regs[R_TIM_RIS] & TIMER_RIS_ACK); + ier = !!(st->regs[R_TIM_CTRL] & TIMER_CTRL_INTR); + ret = ier & isr; + break; + + default: + if (addr < ARRAY_SIZE(st->regs)) { + ret = st->regs[addr]; + } else { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, + addr * 4); + } + break; + } + + DB_PRINT("timer=%d 0x%" HWADDR_PRIx "=0x%" PRIx32 "\n", timer, addr * 4, + ret); + return ret; +} + +static void +timer_write(void *opaque, hwaddr addr, + uint64_t val64, unsigned int size) +{ + MSF2TimerState *t = opaque; + struct Msf2Timer *st; + int timer = 0; + uint32_t value = val64; + + addr >>= 2; + /* + * Two independent timers has same base address. + * Based on addr passed figure out which timer is being used. + */ + if (addr >= R_TIM1_MAX) { + timer = 1; + addr -= R_TIM1_MAX; + } + + st = &t->timers[timer]; + + DB_PRINT("addr=0x%" HWADDR_PRIx " val=0x%" PRIx32 " (timer=%d)\n", addr * 4, + value, timer); + + switch (addr) { + case R_TIM_CTRL: + st->regs[R_TIM_CTRL] = value; + timer_update(st); + break; + + case R_TIM_RIS: + if (value & TIMER_RIS_ACK) { + st->regs[R_TIM_RIS] &= ~TIMER_RIS_ACK; + } + break; + + case R_TIM_LOADVAL: + st->regs[R_TIM_LOADVAL] = value; + if (st->regs[R_TIM_CTRL] & TIMER_CTRL_ENBL) { + timer_update(st); + } + break; + + case R_TIM_BGLOADVAL: + st->regs[R_TIM_BGLOADVAL] = value; + st->regs[R_TIM_LOADVAL] = value; + break; + + case R_TIM_VAL: + case R_TIM_MIS: + break; + + case R_TIM_MODE: + if (value & TIMER_MODE) { + qemu_log_mask(LOG_UNIMP, "64-bit mode not supported\n"); + } + break; + + default: + if (addr < ARRAY_SIZE(st->regs)) { + st->regs[addr] = value; + } else { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, + addr * 4); + } + break; + } + timer_update_irq(st); +} + +static const MemoryRegionOps timer_ops = { + .read = timer_read, + .write = timer_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 4 + } +}; + +static void timer_hit(void *opaque) +{ + struct Msf2Timer *st = opaque; + + st->regs[R_TIM_RIS] |= TIMER_RIS_ACK; + + if (!(st->regs[R_TIM_CTRL] & TIMER_CTRL_ONESHOT)) { + timer_update(st); + } + timer_update_irq(st); +} + +static void msf2_timer_init(Object *obj) +{ + MSF2TimerState *t = MSF2_TIMER(obj); + int i; + + /* Init all the ptimers. */ + t->timers = g_malloc0((sizeof t->timers[0]) * NUM_TIMERS); + for (i = 0; i < NUM_TIMERS; i++) { + struct Msf2Timer *st = &t->timers[i]; + + st->bh = qemu_bh_new(timer_hit, st); + st->ptimer = ptimer_init(st->bh, PTIMER_POLICY_DEFAULT); + ptimer_set_freq(st->ptimer, t->freq_hz); + sysbus_init_irq(SYS_BUS_DEVICE(obj), &st->irq); + } + + memory_region_init_io(&t->mmio, OBJECT(t), &timer_ops, t, TYPE_MSF2_TIMER, + R_TIM_MAX * 4); + sysbus_init_mmio(SYS_BUS_DEVICE(obj), &t->mmio); +} + +static Property msf2_timer_properties[] = { + DEFINE_PROP_UINT32("clock-frequency", MSF2TimerState, freq_hz, + MSF2_TIMER_FREQ), + DEFINE_PROP_END_OF_LIST(), +}; + +static void msf2_timer_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->props = msf2_timer_properties; +} + +static const TypeInfo msf2_timer_info = { + .name = TYPE_MSF2_TIMER, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(MSF2TimerState), + .instance_init = msf2_timer_init, + .class_init = msf2_timer_class_init, +}; + +static void msf2_timer_register_types(void) +{ + type_register_static(&msf2_timer_info); +} + +type_init(msf2_timer_register_types) diff --git a/include/hw/timer/msf2-timer.h b/include/hw/timer/msf2-timer.h new file mode 100644 index 0000000..10eb2f8 --- /dev/null +++ b/include/hw/timer/msf2-timer.h @@ -0,0 +1,85 @@ +/* + * Microsemi SmartFusion2 Timer. + * + * Copyright (c) 2017 Subbaraya Sundeep + * + * 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. + */ + +#ifndef HW_MSF2_TIMER_H +#define HW_MSF2_TIMER_H + +#include "qemu/osdep.h" +#include "hw/sysbus.h" +#include "hw/ptimer.h" +#include "sysemu/sysemu.h" +#include "qemu/log.h" + +#define TYPE_MSF2_TIMER "msf2-timer" +#define MSF2_TIMER(obj) OBJECT_CHECK(MSF2TimerState, \ + (obj), TYPE_MSF2_TIMER) + +/* + * There are two 32-bit down counting timers. + * Timers 1 and 2 can be concatenated into a single 64-bit Timer + * that operates either in Periodic mode or in One-shot mode. + * Writing 1 to the TIM64_MODE register bit 0 sets the Timers in 64-bit mode. + * In 64-bit mode, writing to the 32-bit registers has no effect. + * Similarly, in 32-bit mode, writing to the 64-bit mode registers + * has no effect. Only two 32-bit timers are supported currently. + */ +#define NUM_TIMERS 2 + +#define MSF2_TIMER_FREQ (83 * 1000000) + +#define R_TIM_VAL 0 +#define R_TIM_LOADVAL 1 +#define R_TIM_BGLOADVAL 2 +#define R_TIM_CTRL 3 +#define R_TIM_RIS 4 +#define R_TIM_MIS 5 +#define R_TIM1_MAX 6 + +#define R_TIM_MODE 21 +#define R_TIM_MAX 22 /* including 64-bit timer registers */ + +#define TIMER_CTRL_ENBL (1 << 0) +#define TIMER_CTRL_ONESHOT (1 << 1) +#define TIMER_CTRL_INTR (1 << 2) +#define TIMER_RIS_ACK (1 << 0) +#define TIMER_RST_CLR (1 << 6) +#define TIMER_MODE (1 << 0) + +struct Msf2Timer { + QEMUBH *bh; + ptimer_state *ptimer; + + uint32_t regs[R_TIM_MAX]; + qemu_irq irq; +}; + +typedef struct MSF2TimerState { + SysBusDevice parent_obj; + + MemoryRegion mmio; + uint32_t freq_hz; + struct Msf2Timer *timers; +} MSF2TimerState; + +#endif /* HW_MSF2_TIMER_H */