mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-08-20 05:51:01 +02:00
0711ee5cbc
Introduce timeout_init_us/timeout_elapsed() delay tracking with CNTPCT.
timeout_init_us(some_timeout_us); returns a reference to detect
timeout for the provided microsecond delay value from current time.
timeout_elapsed(reference) return true/false whether the reference
timeout is elapsed.
Cherry picked from OP-TEE implementation [1].
[1] commit 33d30a74502b ("core: timeout detection support")
Minor:
- Remove stm32mp platform duplicated implementation.
- Add new include in marvell ble.mk
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Change-Id: Iaef6d43c11a2e6992fb48efdc674a0552755ad9c
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
|
|
* 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 <stdbool.h>
|
|
#include <stdint.h>
|
|
|
|
#include <arch_helpers.h>
|
|
|
|
/********************************************************************
|
|
* 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_cntfrq_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 */
|