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038790a945
This is a prologue to reverting:
commit 3c66686
Author: Benjamin Walsh <benjamin.walsh@windriver.com>
Date: Tue Feb 9 17:34:02 2016 -0500
sys_clock: start the microkernel ticker in the MICROKERNEL init level
to allow the devices initializing in pre-MICROKERNEL init levels to poll
the hi-res clock (sys_cycle_get_32()), which relies on the system clock
having been started.
This change allows starting the system clock in the NANOKERNEL init
level by delaying announcing the ticks until the MICROKERNEL init level.
Change-Id: I43d54bb5e2f182d4edd880da0124a0817f911943
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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* Copyright (c) 2015 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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/*
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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_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(int32_t ticks);
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extern void _timer_idle_exit(void);
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#endif /* CONFIG_TICKLESS_IDLE */
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extern uint32_t _nano_get_earliest_deadline(void);
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extern void _nano_sys_clock_tick_announce(int32_t ticks);
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#ifdef CONFIG_MICROKERNEL
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extern void (*_do_sys_clock_tick_announce)(kevent_t);
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#define _sys_clock_tick_announce() \
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_do_sys_clock_tick_announce(TICK_EVENT)
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#else
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extern int32_t _sys_idle_elapsed_ticks;
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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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#endif
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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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