函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\time\tick-common.c Create Date:2022-07-27 11:50:20
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Setup the tick device

函数原型：static void tick_setup_device(struct tick_device *td, struct clock_event_device *newdev, int cpu, const struct cpumask *cpumask)

返回类型：void

参数：

类型参数名称
struct tick_device *td
struct clock_event_device *newdev
intcpu
const struct cpumask *cpumask
205  void( * handler)(struct clock_event_device * ) = NULL
206  next_event等于0
211  如果非evtdev则
216  如果ick_do_timer_cpu is a timer core internal variable which holds the CPU NR* which is responsible for calling do_timer(), i恒等于TICK_DO_TIMER_BOOT则
217  ick_do_timer_cpu is a timer core internal variable which holds the CPU NR* which is responsible for calling do_timer(), i等于cpu
219  Tick next event: keeps track of the tick time等于ktime_get()
220  tick_period等于NSEC_PER_SEC除HZ
242  mode等于TICKDEV_MODE_PERIODIC
243  否则
244  handler等于event_handler
245  next_event等于next_event
246  event_handler等于Noop handler when we shut down an event device
249  evtdev等于newdev
255  如果非pumask_equal - *src1p == *src2p*@src1p: the first input*@src2p: the second input则设置中断关系
265  如果Check, if the device is disfunctional and a place holder, which* needs to be handled by the broadcast device.则返回
268  如果mode恒等于TICKDEV_MODE_PERIODIC则Setup the device for a periodic tick
270  否则k_setup_oneshot - setup the event device for oneshot mode (hres or nohz)
调用者
名称描述
tick_install_replacement
tick_check_new_deviceCheck, if the new registered device should be used. Called with* clockevents_lock held and interrupts disabled.