Files
system76-coreboot/src/cpu/ti/am335x/monotonic_timer.c
Angel Pons f23ae0b0f6 src/cpu: Use SPDX for GPL-2.0-only files
Done with sed and God Lines. Only done for C-like code for now.

Change-Id: I2adf28d805fe248d55a9514f74c38280c0ad9a78
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40049
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
2020-04-04 14:59:17 +00:00

42 lines
952 B
C

/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <stdint.h>
#include <delay.h>
#include <timer.h>
#include "dmtimer.h"
static struct monotonic_counter {
int initialized;
struct mono_time time;
uint64_t last_value;
} mono_counter;
static const uint32_t clocks_per_usec = OSC_HZ/1000000;
void timer_monotonic_get(struct mono_time *mt)
{
uint64_t current_tick;
uint64_t usecs_elapsed;
if (!mono_counter.initialized) {
init_timer();
mono_counter.last_value = dmtimer_raw_value(0);
mono_counter.initialized = 1;
}
current_tick = dmtimer_raw_value(0);
usecs_elapsed = (current_tick - mono_counter.last_value) /
clocks_per_usec;
/* Update current time and tick values only if a full tick occurred. */
if (usecs_elapsed) {
mono_time_add_usecs(&mono_counter.time, usecs_elapsed);
mono_counter.last_value = current_tick;
}
/* Save result. */
*mt = mono_counter.time;
}