8dcd5f8c77
The kernel timer subsystem isn't part of the !MULTITHREADING environment (no threads to wake up, though in principle it should be possible to support timeout callbacks with some work in the future). Protect it against platforms that select this but still enable a timer driver. Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
/*
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* Copyright (c) 2015 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Timer driver API
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*
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*
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* Declare API implemented by system timer driver and used by kernel components.
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*/
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#ifndef _TIMER__H_
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#define _TIMER__H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _ASMLANGUAGE
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GTEXT(_timer_int_handler)
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#else /* _ASMLANGUAGE */
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#include <device.h>
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extern int _sys_clock_driver_init(struct device *device);
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extern void _timer_int_handler(void *arg);
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#ifdef CONFIG_SYSTEM_CLOCK_DISABLE
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extern void sys_clock_disable(void);
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#endif
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#ifdef CONFIG_TICKLESS_IDLE
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extern void _timer_idle_enter(s32_t ticks);
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extern void _timer_idle_exit(void);
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#else
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#define _timer_idle_enter(ticks) do { } while ((0))
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#define _timer_idle_exit() do { } while ((0))
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#endif /* CONFIG_TICKLESS_IDLE */
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extern void _nano_sys_clock_tick_announce(s32_t ticks);
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#ifdef CONFIG_TICKLESS_KERNEL
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extern void _set_time(u32_t time);
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extern u32_t _get_program_time(void);
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extern u32_t _get_remaining_program_time(void);
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extern u32_t _get_elapsed_program_time(void);
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extern u64_t _get_elapsed_clock_time(void);
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#endif
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extern int sys_clock_device_ctrl(struct device *device,
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u32_t ctrl_command, void *context);
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/*
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* Currently regarding timers, only loapic timer and arcv2_timer0 implements
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* device pm functionality. For other timers, use default handler in case
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* the app enables CONFIG_DEVICE_POWER_MANAGEMENT.
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*/
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#if !defined(CONFIG_LOAPIC_TIMER) && !defined(CONFIG_ARCV2_TIMER)
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#define sys_clock_device_ctrl device_pm_control_nop
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#endif
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extern s32_t _sys_idle_elapsed_ticks;
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#ifdef CONFIG_MULTITHREADING
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#define _sys_clock_tick_announce() \
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_nano_sys_clock_tick_announce(_sys_idle_elapsed_ticks)
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#else
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#define _sys_clock_tick_announce() /**/
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#endif
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/**
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* @brief Account for the tick due to the timer interrupt
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*
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* @return N/A
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*/
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static inline void _sys_clock_final_tick_announce(void)
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{
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/*
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* Ticks are both announced and immediately processed at interrupt
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* level. Thus there is only one tick left to announce (and process).
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*/
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_sys_idle_elapsed_ticks = 1;
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_sys_clock_tick_announce();
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}
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#endif /* _ASMLANGUAGE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _TIMER__H_ */
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