From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39876) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cxAse-00046y-Ll for qemu-devel@nongnu.org; Sun, 09 Apr 2017 07:19:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cxAsd-0000uI-FL for qemu-devel@nongnu.org; Sun, 09 Apr 2017 07:19:40 -0400 From: Subbaraya Sundeep Date: Sun, 9 Apr 2017 16:49:15 +0530 Message-Id: <1491736758-19540-2-git-send-email-sundeep.lkml@gmail.com> In-Reply-To: <1491736758-19540-1-git-send-email-sundeep.lkml@gmail.com> References: <1491736758-19540-1-git-send-email-sundeep.lkml@gmail.com> Subject: [Qemu-devel] [Qemu-devel RFC v2 1/4] msf2: Add Smartfusion2 System timer List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, qemu-arm@nongnu.org Cc: peter.maydell@linaro.org, crosthwaite.peter@gmail.com, Subbaraya Sundeep 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 | 273 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 274 insertions(+) create mode 100644 hw/timer/msf2_timer.c diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs index dd6f27e..0bdf1e1 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..962ada4 --- /dev/null +++ b/hw/timer/msf2_timer.c @@ -0,0 +1,273 @@ +/* + * 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 "qemu/osdep.h" +#include "hw/sysbus.h" +#include "hw/ptimer.h" +#include "qemu/log.h" +#include "qemu/main-loop.h" + +#define D(x) + +#define NUM_TIMERS 2 + +#define R_VAL 0 +#define R_LOADVAL 1 +#define R_BGLOADVAL 2 +#define R_CTRL 3 +#define R_RIS 4 +#define R_MIS 5 +#define R_MAX 6 + +#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) + +struct msf2_timer { + QEMUBH *bh; + ptimer_state *ptimer; + void *parent; + int nr; /* for debug. */ + + unsigned long timer_div; + + uint32_t regs[R_MAX]; + qemu_irq irq; +}; + +#define TYPE_MSF2_TIMER "msf2-timer" +#define MSF2_TIMER(obj) \ + OBJECT_CHECK(struct timerblock, (obj), TYPE_MSF2_TIMER) + +struct timerblock { + SysBusDevice parent_obj; + + MemoryRegion mmio; + uint32_t freq_hz; + struct msf2_timer *timers; +}; + +static inline unsigned int timer_from_addr(hwaddr addr) +{ + /* Timers get a 6x32bit control reg area each. */ + return addr / R_MAX; +} + +static void timer_update_irq(struct msf2_timer *st) +{ + int isr; + int ier; + + isr = !!(st->regs[R_RIS] & TIMER_RIS_ACK); + ier = !!(st->regs[R_CTRL] & TIMER_CTRL_INTR); + + qemu_set_irq(st->irq, (ier && isr)); +} + +static uint64_t +timer_read(void *opaque, hwaddr addr, unsigned int size) +{ + struct timerblock *t = opaque; + struct msf2_timer *st; + uint32_t r = 0; + unsigned int timer; + int isr; + int ier; + + addr >>= 2; + timer = timer_from_addr(addr); + st = &t->timers[timer]; + + if (timer) { + addr -= 6; + } + + switch (addr) { + case R_VAL: + r = ptimer_get_count(st->ptimer); + D(qemu_log("msf2_timer t=%d read counter=%x\n", timer, r)); + break; + + case R_MIS: + isr = !!(st->regs[R_RIS] & TIMER_RIS_ACK); + ier = !!(st->regs[R_CTRL] & TIMER_CTRL_INTR); + r = ier && isr; + break; + + default: + if (addr < ARRAY_SIZE(st->regs)) { + r = st->regs[addr]; + } + break; + } + D(fprintf(stderr, "%s timer=%d %x=%x\n", __func__, timer, addr * 4, r)); + return r; +} + +static void timer_update(struct msf2_timer *st) +{ + uint64_t count; + + D(fprintf(stderr, "%s timer=%d\n", __func__, st->nr)); + + if (!(st->regs[R_CTRL] & TIMER_CTRL_ENBL)) { + ptimer_stop(st->ptimer); + return; + } + + count = st->regs[R_LOADVAL]; + ptimer_set_limit(st->ptimer, count, 1); + ptimer_run(st->ptimer, 1); +} + +static void +timer_write(void *opaque, hwaddr addr, + uint64_t val64, unsigned int size) +{ + struct timerblock *t = opaque; + struct msf2_timer *st; + unsigned int timer; + uint32_t value = val64; + + addr >>= 2; + timer = timer_from_addr(addr); + st = &t->timers[timer]; + D(fprintf(stderr, "%s addr=%x val=%x (timer=%d)\n", + __func__, addr * 4, value, timer)); + + if (timer) { + addr -= 6; + } + + switch (addr) { + case R_CTRL: + st->regs[R_CTRL] = value; + timer_update(st); + break; + + case R_RIS: + if (value & TIMER_RIS_ACK) { + st->regs[R_RIS] &= ~TIMER_RIS_ACK; + } + break; + + case R_LOADVAL: + st->regs[R_LOADVAL] = value; + if (st->regs[R_CTRL] & TIMER_CTRL_ENBL) { + timer_update(st); + } + break; + + case R_BGLOADVAL: + st->regs[R_BGLOADVAL] = value; + st->regs[R_LOADVAL] = value; + break; + + case R_VAL: + case R_MIS: + break; + + default: + if (addr < ARRAY_SIZE(st->regs)) { + st->regs[addr] = value; + } + 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 msf2_timer *st = opaque; + D(fprintf(stderr, "%s %d\n", __func__, st->nr)); + st->regs[R_RIS] |= TIMER_RIS_ACK; + + if (!(st->regs[R_CTRL] & TIMER_CTRL_ONESHOT)) { + timer_update(st); + } + timer_update_irq(st); +} + +static void msf2_timer_realize(DeviceState *dev, Error **errp) +{ + struct timerblock *t = MSF2_TIMER(dev); + unsigned int i; + + /* Init all the ptimers. */ + t->timers = g_malloc0((sizeof t->timers[0]) * NUM_TIMERS); + for (i = 0; i < NUM_TIMERS; i++) { + struct msf2_timer *st = &t->timers[i]; + + st->parent = t; + st->nr = 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(dev), &st->irq); + } + + memory_region_init_io(&t->mmio, OBJECT(t), &timer_ops, t, "msf2-timer", + R_MAX * 4 * NUM_TIMERS); + sysbus_init_mmio(SYS_BUS_DEVICE(dev), &t->mmio); +} + +static Property msf2_timer_properties[] = { + DEFINE_PROP_UINT32("clock-frequency", struct timerblock, freq_hz, + 83 * 1000000), + DEFINE_PROP_END_OF_LIST(), +}; + +static void msf2_timer_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = msf2_timer_realize; + dc->props = msf2_timer_properties; +} + +static const TypeInfo msf2_timer_info = { + .name = TYPE_MSF2_TIMER, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(struct timerblock), + .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) -- 2.5.0