6b55598ad4
Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com> Signed-off-by: Anas Nashif <anas.nashif@intel.com>
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/*
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* Copyright (c) 2017 Oticon A/S
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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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* Driver for the timer model of the POSIX native_posix board
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* It provides the interfaces required by the kernel and the sanity testcases
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* It also provides a custom k_busy_wait() which can be used with the
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* POSIX arch and InfClock SOC
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*/
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#include "zephyr/types.h"
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#include "irq.h"
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#include "device.h"
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#include "drivers/system_timer.h"
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#include "timer_model.h"
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#include "soc.h"
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/**
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* Return the current HW cycle counter
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* (number of microseconds since boot in 32bits)
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*/
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u32_t _timer_cycle_get_32(void)
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{
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return hwm_get_time();
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}
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#ifdef CONFIG_TICKLESS_IDLE
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void _timer_idle_enter(int32_t sys_ticks)
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{
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hwtimer_set_silent_ticks(sys_ticks);
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}
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void _timer_idle_exit(void)
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{
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hwtimer_set_silent_ticks(0);
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}
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#endif
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static void sp_timer_isr(void *arg)
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{
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ARG_UNUSED(arg);
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_sys_clock_tick_announce();
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}
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int _sys_clock_driver_init(struct device *device)
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{
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ARG_UNUSED(device);
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IRQ_CONNECT(TIMER_TICK_IRQ, 1, sp_timer_isr, 0, 0);
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irq_enable(TIMER_TICK_IRQ);
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return 0;
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}
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#if defined(CONFIG_ARCH_HAS_CUSTOM_BUSY_WAIT)
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/**
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* Replacement to the kernel k_busy_wait()
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* Will block this thread (and therefore the whole zephyr) during usec_to_wait
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*
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* Note that interrupts may be received in the meanwhile and that therefore this
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* thread may loose context
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*/
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void k_busy_wait(u32_t usec_to_wait)
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{
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u64_t time_end = hwm_get_time() + usec_to_wait;
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while (hwm_get_time() < time_end) {
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/*There may be wakes due to other interrupts*/
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hwtimer_wake_in_time(time_end);
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posix_halt_cpu();
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}
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}
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#endif
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