From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 11:13:47 +0200 Subject: Adding upstream version 2.8.0+dfsg. Signed-off-by: Daniel Baumann --- include/drivers/delay_timer.h | 53 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 include/drivers/delay_timer.h (limited to 'include/drivers/delay_timer.h') diff --git a/include/drivers/delay_timer.h b/include/drivers/delay_timer.h new file mode 100644 index 0000000..20a5543 --- /dev/null +++ b/include/drivers/delay_timer.h @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2019, Linaro Limited + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef DELAY_TIMER_H +#define DELAY_TIMER_H + +#include +#include + +#include + +/******************************************************************** + * A simple timer driver providing synchronous delay functionality. + * The driver must be initialized with a structure that provides a + * function pointer to return the timer value and a clock + * multiplier/divider. The ratio of the multiplier and the divider is + * the clock period in microseconds. + ********************************************************************/ + +typedef struct timer_ops { + uint32_t (*get_timer_value)(void); + uint32_t clk_mult; + uint32_t clk_div; +} timer_ops_t; + +static inline uint64_t timeout_cnt_us2cnt(uint32_t us) +{ + return ((uint64_t)us * (uint64_t)read_cntfrq_el0()) / 1000000ULL; +} + +static inline uint64_t timeout_init_us(uint32_t us) +{ + uint64_t cnt = timeout_cnt_us2cnt(us); + + cnt += read_cntpct_el0(); + + return cnt; +} + +static inline bool timeout_elapsed(uint64_t expire_cnt) +{ + return read_cntpct_el0() > expire_cnt; +} + +void mdelay(uint32_t msec); +void udelay(uint32_t usec); +void timer_init(const timer_ops_t *ops_ptr); + +#endif /* DELAY_TIMER_H */ -- cgit v1.2.3