80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/* system_timer.h - timer driver API */
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/*
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* Copyright (c) 2015 Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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DESCRIPTION
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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 _ASMLANGUAGE
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GTEXT(_timer_int_handler)
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#else /* _ASMLANGUAGE */
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extern uint32_t timer_read(void);
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extern void timer_driver(int prio);
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/*
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* Timer interrupt handler is one of the routines that the driver
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* has to implement, but it is not necessarily an external function.
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* The driver may implement it and use only when setting an
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* interrupt handler by calling irq_connect.
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*/
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extern void _timer_int_handler(void *arg);
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#ifdef CONFIG_SYSTEM_TIMER_DISABLE
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extern void timer_disable(void);
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#endif
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#ifdef CONFIG_TICKLESS_IDLE
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extern void _timer_idle_enter(int32_t ticks);
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extern void _timer_idle_exit(void);
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#endif /* TIMER_SUPPORTS_TICKLESS */
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#ifdef CONFIG_MICROKERNEL
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#define _sys_clock_tick_announce() \
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nano_isr_stack_push(&_k_command_stack, TICK_EVENT)
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#else
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extern void _do_sys_clock_tick_announce(uint32_t ticks);
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extern uint32_t _sys_idle_elapsed_ticks;
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#define _sys_clock_tick_announce() \
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_do_sys_clock_tick_announce(_sys_idle_elapsed_ticks)
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#endif
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#endif /* _ASMLANGUAGE */
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#endif /* _TIMER__H_ */
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