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Diffstat (limited to 'FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/watchdog.h')
-rw-r--r-- | FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/watchdog.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/watchdog.h b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/watchdog.h new file mode 100644 index 000000000..b5ff48697 --- /dev/null +++ b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/metal/watchdog.h @@ -0,0 +1,163 @@ +/* Copyright 2019 SiFive, Inc */ +/* SPDX-License-Identifier: Apache-2.0 */ + +#ifndef METAL__WATCHDOG_H +#define METAL__WATCHDOG_H + +/*! + * @file watchdog.h + * + * @brief API for configuring watchdog timers + */ + +#include <metal/interrupt.h> + +struct metal_watchdog; + +/*! + * @brief List of watchdog timer count behaviors + */ +enum metal_watchdog_run_option { + METAL_WATCHDOG_STOP = 0, /*!< Stop the watchdog */ + METAL_WATCHDOG_RUN_ALWAYS, /*!< Run the watchdog continuously, even during sleep */ + METAL_WATCHDOG_RUN_AWAKE, /*!< Run the watchdog only while the CPU is awake */ +}; + +/*! + * @brief List of behaviors when a watchdog triggers + */ +enum metal_watchdog_result { + METAL_WATCHDOG_NO_RESULT = 0, /*!< When the watchdog triggers, do nothing */ + METAL_WATCHDOG_INTERRUPT, /*!< When the watchdog triggers, fire an interrupt */ + METAL_WATCHDOG_FULL_RESET, /*!< When the watchdog triggers, cause a full system reset */ +}; + + +struct metal_watchdog_vtable { + int (*feed)(const struct metal_watchdog *const wdog); + long int (*get_rate)(const struct metal_watchdog *const wdog); + long int (*set_rate)(const struct metal_watchdog *const wdog, const long int rate); + long int (*get_timeout)(const struct metal_watchdog *const wdog); + long int (*set_timeout)(const struct metal_watchdog *const wdog, const long int timeout); + int (*set_result)(const struct metal_watchdog *const wdog, + const enum metal_watchdog_result result); + int (*run)(const struct metal_watchdog *const wdog, + const enum metal_watchdog_run_option option); + struct metal_interrupt *(*get_interrupt)(const struct metal_watchdog *const wdog); + int (*get_interrupt_id)(const struct metal_watchdog *const wdog); + int (*clear_interrupt)(const struct metal_watchdog *const wdog); +}; + +/*! + * @brief Handle for a Watchdog Timer + */ +struct metal_watchdog { + const struct metal_watchdog_vtable *vtable; +}; + +/*! + * @brief Feed the watchdog timer + */ +inline int metal_watchdog_feed(const struct metal_watchdog *const wdog) +{ + return wdog->vtable->feed(wdog); +} + +/*! + * @brief Get the rate of the watchdog timer in Hz + * + * @return the rate of the watchdog timer + */ +inline long int metal_watchdog_get_rate(const struct metal_watchdog *const wdog) +{ + return wdog->vtable->get_rate(wdog); +} + +/*! + * @brief Set the rate of the watchdog timer in Hz + * + * There is no guarantee that the new rate will match the requested rate. + * + * @return the new rate of the watchdog timer + */ +inline long int metal_watchdog_set_rate(const struct metal_watchdog *const wdog, const long int rate) +{ + return wdog->vtable->set_rate(wdog, rate); +} + +/*! + * @brief Get the timeout of the watchdog timer + * + * @return the watchdog timeout value + */ +inline long int metal_watchdog_get_timeout(const struct metal_watchdog *const wdog) +{ + return wdog->vtable->get_timeout(wdog); +} + +/*! + * @brief Set the timeout of the watchdog timer + * + * The set rate will be the minimimum of the requested and maximum supported rates. + * + * @return the new watchdog timeout value + */ +inline long int metal_watchdog_set_timeout(const struct metal_watchdog *const wdog, const long int timeout) +{ + return wdog->vtable->set_timeout(wdog, timeout); +} + +/*! + * @brief Sets the result behavior of a watchdog timer timeout + * + * @return 0 if the requested result behavior is supported + */ +inline int metal_watchdog_set_result(const struct metal_watchdog *const wdog, + const enum metal_watchdog_result result) +{ + return wdog->vtable->set_result(wdog, result); +} + +/*! + * @brief Set the run behavior of the watchdog + * + * Used to enable/disable the watchdog timer + * + * @return 0 if the watchdog was successfully started/stopped + */ +inline int metal_watchdog_run(const struct metal_watchdog *const wdog, + const enum metal_watchdog_run_option option) +{ + return wdog->vtable->run(wdog, option); +} + +/*! + * @brief Get the interrupt controller for the watchdog interrupt + */ +inline struct metal_interrupt *metal_watchdog_get_interrupt(const struct metal_watchdog *const wdog) +{ + return wdog->vtable->get_interrupt(wdog); +} + +/*! + * @Brief Get the interrupt id for the watchdog interrupt + */ +inline int metal_watchdog_get_interrupt_id(const struct metal_watchdog *const wdog) +{ + return wdog->vtable->get_interrupt_id(wdog); +} + +/*! + * @brief Clear the watchdog interrupt + */ +inline int metal_watchdog_clear_interrupt(const struct metal_watchdog *const wdog) +{ + return wdog->vtable->clear_interrupt(wdog); +} + +/*! + * @brief Get a watchdog handle + */ +struct metal_watchdog *metal_watchdog_get_device(const int index); + +#endif /* METAL__WATCHDOG_H */ |