Lines Matching +full:init +full:- +full:delay

1 // SPDX-License-Identifier: GPL-2.0
2 /* calibrate.c: default delay calibration
4  * Excised from init/main.c
9 #include <linux/delay.h>
10 #include <linux/init.h>
28  * loops per jiffy directly, instead of guessing it using delay().
29  * Also, this code tries to handle non-maskable asynchronous events
44 	int max = -1; /* index of measured_times with max/min values or not set */  in calibrate_delay_direct()
45 	int min = -1;  in calibrate_delay_direct()
60 	 * 1. pre_start <- When we are sure that jiffy switch hasn't happened  in calibrate_delay_direct()
62 	 * 3. start <- timer value before or after jiffy switch  in calibrate_delay_direct()
63 	 * 4. post_start <- When we are sure that jiffy switch has happened  in calibrate_delay_direct()
89 		timer_rate_max = (post_end - pre_start) /  in calibrate_delay_direct()
91 		timer_rate_min = (pre_end - post_start) /  in calibrate_delay_direct()
104 		    (timer_rate_max - timer_rate_min) < (timer_rate_max >> 3)) {  in calibrate_delay_direct()
118 	 * Find the maximum & minimum - if they differ too much throw out the  in calibrate_delay_direct()
130 		if ((measured_times[max] - measured_times[min]) < maxdiff)  in calibrate_delay_direct()
133 		/* ok - drop the worse value and try again... */  in calibrate_delay_direct()
136 		if ((measured_times[max] - estimate) <  in calibrate_delay_direct()
137 				(estimate - measured_times[min])) {  in calibrate_delay_direct()
180  * For the boot cpu we can skip the delay calibration and assign it a value
189 	/* First stage - slowly accelerate to find initial bounds */  in calibrate_delay_converge()
213 	trials -= band;  in calibrate_delay_converge()
234 			lpj -= loopadd;  in calibrate_delay_converge()
254  * Check if cpu calibration delay is already known. For example,
255  * some processors with multi-core sockets may have all cores
256  * with the same calibration delay.
267  * Indicate the cpu delay calibration is done. This can be used by
268  * architectures to stop accepting delay timer registrations after this point.
284 			pr_info("Calibrating delay loop (skipped) "  in calibrate_delay()
289 			pr_info("Calibrating delay loop (skipped) "  in calibrate_delay()
293 		pr_info("Calibrating delay loop (skipped), "  in calibrate_delay()
299 			pr_info("Calibrating delay using timer "  in calibrate_delay()
303 			pr_info("Calibrating delay loop... ");  in calibrate_delay()