mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-06 10:21:57 +00:00
cc334c7273
Convert code to use u{8,16,32,64}_t and s{8,16,32,64}_t instead of C99
integer types. This handles the remaining includes and kernel, plus
touching up various points that we skipped because of include
dependancies. We also convert the PRI printf formatters in the arch
code over to normal formatters.
Jira: ZEP-2051
Change-Id: Iecbb12601a3ee4ea936fd7ddea37788a645b08b0
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
/*
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* Copyright (c) 2014-2015 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Variables needed needed for system clock
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*
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*
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* Declare variables used by both system timer device driver and kernel
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* components that use timer functionality.
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*/
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#ifndef _SYS_CLOCK__H_
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#define _SYS_CLOCK__H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _ASMLANGUAGE
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#include <zephyr/types.h>
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#if defined(CONFIG_SYS_CLOCK_EXISTS) && \
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(CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC == 0)
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#error "SYS_CLOCK_HW_CYCLES_PER_SEC must be non-zero!"
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#endif
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#define sys_clock_ticks_per_sec CONFIG_SYS_CLOCK_TICKS_PER_SEC
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#if defined(CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME)
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extern int sys_clock_hw_cycles_per_sec;
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#else
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#define sys_clock_hw_cycles_per_sec CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC
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#endif
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/*
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* sys_clock_us_per_tick global variable represents a number
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* of microseconds in one OS timer tick
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*/
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extern int sys_clock_us_per_tick;
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/*
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* sys_clock_hw_cycles_per_tick global variable represents a number
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* of platform clock ticks in one OS timer tick.
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* sys_clock_hw_cycles_per_tick often represents a value of divider
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* of the board clock frequency
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*/
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extern int sys_clock_hw_cycles_per_tick;
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/* number of nsec per usec */
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#define NSEC_PER_USEC 1000
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/* number of microseconds per millisecond */
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#define USEC_PER_MSEC 1000
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/* number of milliseconds per second */
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#define MSEC_PER_SEC 1000
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/* number of microseconds per second */
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#define USEC_PER_SEC ((USEC_PER_MSEC) * (MSEC_PER_SEC))
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/* number of nanoseconds per second */
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#define NSEC_PER_SEC ((NSEC_PER_USEC) * (USEC_PER_MSEC) * (MSEC_PER_SEC))
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/* SYS_CLOCK_HW_CYCLES_TO_NS64 converts CPU clock cycles to nanoseconds */
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#define SYS_CLOCK_HW_CYCLES_TO_NS64(X) \
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(((u64_t)(X) * sys_clock_us_per_tick * NSEC_PER_USEC) / \
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sys_clock_hw_cycles_per_tick)
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/*
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* SYS_CLOCK_HW_CYCLES_TO_NS_AVG converts CPU clock cycles to nanoseconds
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* and calculates the average cycle time
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*/
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#define SYS_CLOCK_HW_CYCLES_TO_NS_AVG(X, NCYCLES) \
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(u32_t)(SYS_CLOCK_HW_CYCLES_TO_NS64(X) / NCYCLES)
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/**
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* @defgroup clock_apis Kernel Clock APIs
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* @ingroup kernel_apis
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* @{
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*/
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/**
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* @brief Compute nanoseconds from hardware clock cycles.
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*
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* This macro converts a time duration expressed in hardware clock cycles
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* to the equivalent duration expressed in nanoseconds.
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*
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* @param X Duration in hardware clock cycles.
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*
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* @return Duration in nanoseconds.
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*/
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#define SYS_CLOCK_HW_CYCLES_TO_NS(X) (u32_t)(SYS_CLOCK_HW_CYCLES_TO_NS64(X))
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/**
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* @} end defgroup clock_apis
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*/
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extern s64_t _sys_clock_tick_count;
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/*
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* Number of ticks for x seconds. NOTE: With MSEC() or USEC(),
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* since it does an integer division, x must be greater or equal to
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* 1000/sys_clock_ticks_per_sec to get a non-zero value.
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* You may want to raise CONFIG_SYS_CLOCK_TICKS_PER_SEC depending on
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* your requirements.
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*/
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#define SECONDS(x) ((x) * sys_clock_ticks_per_sec)
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#define MSEC(x) (SECONDS(x) / MSEC_PER_SEC)
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#define USEC(x) (MSEC(x) / USEC_PER_MSEC)
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#endif /* !_ASMLANGUAGE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_CLOCK__H_ */
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