/* | |
* Copyright (c) 2015-2019 Cadence Design Systems, Inc. | |
* | |
* 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. | |
*/ | |
/* | |
* 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 */ | |