| /* |
| * 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 */ |