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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*/
#include <kernel/tee_time.h>
#include <kernel/time_source.h>
#include <kernel/mutex.h>
static TEE_Time prev;
static struct mutex time_mu = MUTEX_INITIALIZER;
static TEE_Result get_monotonic_ree_time(TEE_Time *time)
{
TEE_Result res;
res = tee_time_get_ree_time(time);
if (res != TEE_SUCCESS)
return res;
mutex_lock(&time_mu);
if (time->seconds < prev.seconds ||
(time->seconds == prev.seconds &&
time->millis < prev.millis))
*time = prev; /* REE time was rolled back */
else
prev = *time;
mutex_unlock(&time_mu);
return res;
}
static const struct time_source ree_time_source = {
.name = "ree",
.protection_level = 100,
.get_sys_time = get_monotonic_ree_time,
};
REGISTER_TIME_SOURCE(ree_time_source)
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