| /* SPDX-License-Identifier: BSD-2-Clause */ |
| /* |
| * Copyright (c) 2018, Linaro Limited |
| * Copyright (C) 2017, Fuzhou Rockchip Electronics Co., Ltd. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef __KERNEL_DELAY_H |
| #define __KERNEL_DELAY_H |
| |
| #include <arm.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| |
| void udelay(uint32_t us); |
| void mdelay(uint32_t ms); |
| |
| static inline uint64_t arm_cnt_us2cnt(uint32_t us) |
| { |
| return ((uint64_t)us * (uint64_t)read_cntfrq()) / 1000000ULL; |
| } |
| |
| static inline uint64_t timeout_init_us(uint32_t us) |
| { |
| return read_cntpct() + arm_cnt_us2cnt(us); |
| } |
| |
| static inline bool timeout_elapsed(uint64_t expire) |
| { |
| return read_cntpct() > expire; |
| } |
| |
| #endif |