2  * Copyright (c) 2014-2015 Wind River Systems, Inc.
5  * SPDX-License-Identifier: Apache-2.0
51 #define MAX_TICKS ((COUNTER_MAX / CYC_PER_TICK) - 1)
168  * - reprogramming of LIMIT must be clearing the COUNT
169  * - ISR must be clearing the 'overflow_cycles' counter.
170  * - no more than one counter-wrap has occurred between
171  *     - the timer reset or the last time the function was called
172  *     - and until the current call of the function is completed.
173  * - the function is invoked with interrupts disabled.
218 	k_spinlock_key_t key;  in timer_int_handler()  local
223 	key = k_spin_lock(&lock);  in timer_int_handler()
227 	dticks = (curr_time - last_time) / CYC_PER_TICK;  in timer_int_handler()
231 	k_spin_unlock(&lock, key);  in timer_int_handler()
242 	uint32_t key;  in timer_int_handler()  local
244 	key = arch_irq_lock();  in timer_int_handler()
250 	arch_irq_unlock(key);  in timer_int_handler()
252 	dticks = (cycle_count - announced_cycles) / CYC_PER_TICK;  in timer_int_handler()
266 	/* as 64-bits GFRC is used as wall clock, it's ok to ignore idle  in sys_clock_set_timeout()
268 	 * However for single core using 32-bits arc timer, idle cannot  in sys_clock_set_timeout()
269 	 * be ignored, as 32-bits timer will overflow in a not-long time.  in sys_clock_set_timeout()
280 	uint32_t key;  in sys_clock_set_timeout()  local
291 	key = arch_irq_lock();  in sys_clock_set_timeout()
293 	timer0_limit_register_set(delay - 1);  in sys_clock_set_timeout()
298 	arch_irq_unlock(key);  in sys_clock_set_timeout()
313 	ticks = MIN(MAX_TICKS, (uint32_t)(MAX((int32_t)(ticks - 1), 0)));  in sys_clock_set_timeout()
315 	k_spinlock_key_t key = k_spin_lock(&lock);  in sys_clock_set_timeout()
328 	unannounced = cycle_count - announced_cycles;  in sys_clock_set_timeout()
331 		/* We haven't announced for more than half the 32-bit  in sys_clock_set_timeout()
346 		delay -= unannounced;  in sys_clock_set_timeout()
352 	timer0_limit_register_set(last_load - 1);  in sys_clock_set_timeout()
355 	k_spin_unlock(&lock, key);  in sys_clock_set_timeout()
367 	k_spinlock_key_t key = k_spin_lock(&lock);  in sys_clock_elapsed()  local
370 	cyc = (z_arc_connect_gfrc_read() - last_time);  in sys_clock_elapsed()
372 	cyc =  elapsed() + cycle_count - announced_cycles;  in sys_clock_elapsed()
375 	k_spin_unlock(&lock, key);  in sys_clock_elapsed()
383 	return z_arc_connect_gfrc_read() - start_time;  in sys_clock_cycle_get_32()
385 	k_spinlock_key_t key = k_spin_lock(&lock);  in sys_clock_cycle_get_32()
388 	k_spin_unlock(&lock, key);  in sys_clock_cycle_get_32()
396 	/* set the initial status of timer0 of each slave core  in smp_timer_init()
426 	timer0_limit_register_set(CYC_PER_TICK - 1);  in sys_clock_driver_init()
437 	timer0_limit_register_set(last_load - 1);  in sys_clock_driver_init()