You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/*
|
|
* FreeRTOS Kernel <DEVELOPMENT BRANCH>
|
|
* Copyright (C) 2015-2019 Cadence Design Systems, Inc.
|
|
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
* the Software, and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* https://www.FreeRTOS.org
|
|
* https://github.com/FreeRTOS
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* XTENSA INITIALIZATION ROUTINES CODED IN C
|
|
*
|
|
* This file contains miscellaneous Xtensa RTOS-generic initialization functions
|
|
* that are implemented in C.
|
|
*/
|
|
|
|
|
|
#ifdef XT_BOARD
|
|
#include <xtensa/xtbsp.h>
|
|
#endif
|
|
|
|
#include "xtensa_rtos.h"
|
|
|
|
#ifdef XT_RTOS_TIMER_INT
|
|
|
|
unsigned _xt_tick_divisor = 0; /* cached number of cycles per tick */
|
|
|
|
/*
|
|
Compute and initialize at run-time the tick divisor (the number of
|
|
processor clock cycles in an RTOS tick, used to set the tick timer).
|
|
Called when the processor clock frequency is not known at compile-time.
|
|
*/
|
|
void _xt_tick_divisor_init(void)
|
|
{
|
|
#ifdef XT_CLOCK_FREQ
|
|
|
|
_xt_tick_divisor = (XT_CLOCK_FREQ / XT_TICK_PER_SEC);
|
|
|
|
#else
|
|
|
|
#ifdef XT_BOARD
|
|
_xt_tick_divisor = xtbsp_clock_freq_hz() / XT_TICK_PER_SEC;
|
|
#else
|
|
#error "No way to obtain processor clock frequency"
|
|
#endif /* XT_BOARD */
|
|
|
|
#endif /* XT_CLOCK_FREQ */
|
|
}
|
|
|
|
#endif /* XT_RTOS_TIMER_INT */
|
|
|