mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 18:28:55 +00:00
881d410825
This patch introduces a schedule() function, which shall be used instead of the old WATCHDOG_RESET. Follow-up patches will make sure, that this new function is used. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Tom Rini <trini@konsulko.com> [am335x_evm, mx6cuboxi, rpi_3,dra7xx_evm, pine64_plus, am65x_evm, j721e_evm]
150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* A general-purpose cyclic execution infrastructure, to allow "small"
|
|
* (run-time wise) functions to be executed at a specified frequency.
|
|
* Things like LED blinking or watchdog triggering are examples for such
|
|
* tasks.
|
|
*
|
|
* Copyright (C) 2022 Stefan Roese <sr@denx.de>
|
|
*/
|
|
|
|
#ifndef __cyclic_h
|
|
#define __cyclic_h
|
|
|
|
#include <linux/list.h>
|
|
#include <asm/types.h>
|
|
|
|
/**
|
|
* struct cyclic_drv - Cyclic driver internal data
|
|
*
|
|
* @cyclic_list: Cylic list node
|
|
* @cyclic_ready: Flag if cyclic infrastructure is ready
|
|
* @cyclic_running: Flag if cyclic infrastructure is running
|
|
*/
|
|
struct cyclic_drv {
|
|
struct list_head cyclic_list;
|
|
bool cyclic_ready;
|
|
bool cyclic_running;
|
|
};
|
|
|
|
/**
|
|
* struct cyclic_info - Information about cyclic execution function
|
|
*
|
|
* @func: Function to call periodically
|
|
* @ctx: Context pointer to get passed to this function
|
|
* @name: Name of the cyclic function, e.g. shown in the commands
|
|
* @delay_ns: Delay is ns after which this function shall get executed
|
|
* @start_time_us: Start time in us, when this function started its execution
|
|
* @cpu_time_us: Total CPU time of this function
|
|
* @run_cnt: Counter of executions occurances
|
|
* @next_call: Next time in us, when the function shall be executed again
|
|
* @list: List node
|
|
*/
|
|
struct cyclic_info {
|
|
void (*func)(void *ctx);
|
|
void *ctx;
|
|
char *name;
|
|
uint64_t delay_us;
|
|
uint64_t start_time_us;
|
|
uint64_t cpu_time_us;
|
|
uint64_t run_cnt;
|
|
uint64_t next_call;
|
|
struct list_head list;
|
|
};
|
|
|
|
/** Function type for cyclic functions */
|
|
typedef void (*cyclic_func_t)(void *ctx);
|
|
|
|
#if defined(CONFIG_CYCLIC)
|
|
/**
|
|
* cyclic_register - Register a new cyclic function
|
|
*
|
|
* @func: Function to call periodically
|
|
* @delay_us: Delay is us after which this function shall get executed
|
|
* @name: Cyclic function name/id
|
|
* @ctx: Context to pass to the function
|
|
* @return: pointer to cyclic_struct if OK, NULL on error
|
|
*/
|
|
struct cyclic_info *cyclic_register(cyclic_func_t func, uint64_t delay_us,
|
|
const char *name, void *ctx);
|
|
|
|
/**
|
|
* cyclic_unregister - Unregister a cyclic function
|
|
*
|
|
* @cyclic: Pointer to cyclic_struct of the function that shall be removed
|
|
* @return: 0 if OK, -ve on error
|
|
*/
|
|
int cyclic_unregister(struct cyclic_info *cyclic);
|
|
|
|
/**
|
|
* cyclic_init() - Set up cyclic functions
|
|
*
|
|
* Init a list of cyclic functions, so that these can be added as needed
|
|
*/
|
|
int cyclic_init(void);
|
|
|
|
/**
|
|
* cyclic_uninit() - Clean up cyclic functions
|
|
*
|
|
* This removes all cyclic functions
|
|
*/
|
|
int cyclic_uninit(void);
|
|
|
|
/**
|
|
* cyclic_get_list() - Get cyclic list pointer
|
|
*
|
|
* Return the cyclic list pointer
|
|
*
|
|
* @return: pointer to cyclic_list
|
|
*/
|
|
struct list_head *cyclic_get_list(void);
|
|
|
|
/**
|
|
* cyclic_run() - Interate over all registered cyclic functions
|
|
*
|
|
* Interate over all registered cyclic functions and if the it's function
|
|
* needs to be executed, then call into these registered functions.
|
|
*/
|
|
void cyclic_run(void);
|
|
|
|
/**
|
|
* schedule() - Schedule all potentially waiting tasks
|
|
*
|
|
* Basically a wrapper for cyclic_run(), pontentially enhanced by some
|
|
* other parts, that need to get handled periodically.
|
|
*/
|
|
void schedule(void);
|
|
#else
|
|
static inline struct cyclic_info *cyclic_register(cyclic_func_t func,
|
|
uint64_t delay_us,
|
|
const char *name,
|
|
void *ctx)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int cyclic_unregister(struct cyclic_info *cyclic)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void cyclic_run(void)
|
|
{
|
|
}
|
|
|
|
static inline void schedule(void)
|
|
{
|
|
}
|
|
|
|
static inline int cyclic_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int cyclic_uninit(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif
|