245 lines
7.8 KiB
C
245 lines
7.8 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
|
2011,2012,2013 Giovanni Di Sirio.
|
|
|
|
This file is part of ChibiOS/RT.
|
|
|
|
ChibiOS/RT is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ChibiOS/RT is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/**
|
|
* @file chsys.h
|
|
* @brief System related macros and structures.
|
|
*
|
|
* @addtogroup system
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _CHSYS_H_
|
|
#define _CHSYS_H_
|
|
|
|
/*===========================================================================*/
|
|
/* Module constants. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Module pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Module data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Module macros. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @name ISRs abstraction macros
|
|
*/
|
|
/**
|
|
* @brief IRQ handler enter code.
|
|
* @note Usually IRQ handlers functions are also declared naked.
|
|
* @note On some architectures this macro can be empty.
|
|
*
|
|
* @special
|
|
*/
|
|
#define CH_IRQ_PROLOGUE() \
|
|
PORT_IRQ_PROLOGUE(); \
|
|
dbg_check_enter_isr();
|
|
|
|
/**
|
|
* @brief IRQ handler exit code.
|
|
* @note Usually IRQ handlers function are also declared naked.
|
|
* @note This macro usually performs the final reschedule by using
|
|
* @p chSchIsPreemptionRequired() and @p chSchDoReschedule().
|
|
*
|
|
* @special
|
|
*/
|
|
#define CH_IRQ_EPILOGUE() \
|
|
dbg_check_leave_isr(); \
|
|
PORT_IRQ_EPILOGUE();
|
|
|
|
/**
|
|
* @brief Standard normal IRQ handler declaration.
|
|
* @note @p id can be a function name or a vector number depending on the
|
|
* port implementation.
|
|
*
|
|
* @special
|
|
*/
|
|
#define CH_IRQ_HANDLER(id) PORT_IRQ_HANDLER(id)
|
|
/** @} */
|
|
|
|
/**
|
|
* @name Fast ISRs abstraction macros
|
|
*/
|
|
/**
|
|
* @brief Standard fast IRQ handler declaration.
|
|
* @note @p id can be a function name or a vector number depending on the
|
|
* port implementation.
|
|
* @note Not all architectures support fast interrupts.
|
|
*
|
|
* @special
|
|
*/
|
|
#define CH_FAST_IRQ_HANDLER(id) PORT_FAST_IRQ_HANDLER(id)
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void chSysInit(void);
|
|
void chSysHalt(void);
|
|
void chSysTimerHandlerI(void);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/*===========================================================================*/
|
|
/* Module inline functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Performs a context switch.
|
|
* @note Not a user function, it is meant to be invoked by the scheduler
|
|
* itself or from within the port layer.
|
|
*
|
|
* @param[in] ntp the thread to be switched in
|
|
* @param[in] otp the thread to be switched out
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysSwitch(thread_t *ntp, thread_t *otp) {
|
|
|
|
dbg_trace(otp);
|
|
THREAD_CONTEXT_SWITCH_HOOK(ntp, otp);
|
|
port_switch(ntp, otp);
|
|
}
|
|
|
|
/**
|
|
* @brief Raises the system interrupt priority mask to the maximum level.
|
|
* @details All the maskable interrupt sources are disabled regardless their
|
|
* hardware priority.
|
|
* @note Do not invoke this API from within a kernel lock.
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysDisable(void) {
|
|
|
|
port_disable();
|
|
dbg_check_disable();
|
|
}
|
|
|
|
/**
|
|
* @brief Raises the system interrupt priority mask to system level.
|
|
* @details The interrupt sources that should not be able to preempt the kernel
|
|
* are disabled, interrupt sources with higher priority are still
|
|
* enabled.
|
|
* @note Do not invoke this API from within a kernel lock.
|
|
* @note This API is no replacement for @p chSysLock(), the @p chSysLock()
|
|
* could do more than just disable the interrupts.
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysSuspend(void) {
|
|
|
|
port_suspend();
|
|
dbg_check_suspend();
|
|
}
|
|
|
|
/**
|
|
* @brief Lowers the system interrupt priority mask to user level.
|
|
* @details All the interrupt sources are enabled.
|
|
* @note Do not invoke this API from within a kernel lock.
|
|
* @note This API is no replacement for @p chSysUnlock(), the
|
|
* @p chSysUnlock() could do more than just enable the interrupts.
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysEnable(void) {
|
|
|
|
dbg_check_enable();
|
|
port_enable();
|
|
}
|
|
|
|
/**
|
|
* @brief Enters the kernel lock mode.
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysLock(void) {
|
|
|
|
port_lock();
|
|
dbg_check_lock();
|
|
}
|
|
|
|
/**
|
|
* @brief Leaves the kernel lock mode.
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysUnlock(void) {
|
|
|
|
dbg_check_unlock();
|
|
port_unlock();
|
|
}
|
|
|
|
/**
|
|
* @brief Enters the kernel lock mode from within an interrupt handler.
|
|
* @note This API may do nothing on some architectures, it is required
|
|
* because on ports that support preemptable interrupt handlers
|
|
* it is required to raise the interrupt mask to the same level of
|
|
* the system mutual exclusion zone.<br>
|
|
* It is good practice to invoke this API before invoking any I-class
|
|
* syscall from an interrupt handler.
|
|
* @note This API must be invoked exclusively from interrupt handlers.
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysLockFromIsr(void) {
|
|
|
|
port_lock_from_isr();
|
|
dbg_check_lock_from_isr();
|
|
}
|
|
|
|
/**
|
|
* @brief Leaves the kernel lock mode from within an interrupt handler.
|
|
*
|
|
* @note This API may do nothing on some architectures, it is required
|
|
* because on ports that support preemptable interrupt handlers
|
|
* it is required to raise the interrupt mask to the same level of
|
|
* the system mutual exclusion zone.<br>
|
|
* It is good practice to invoke this API after invoking any I-class
|
|
* syscall from an interrupt handler.
|
|
* @note This API must be invoked exclusively from interrupt handlers.
|
|
*
|
|
* @special
|
|
*/
|
|
static inline void chSysUnlockFromIsr(void) {
|
|
|
|
dbg_check_unlock_from_isr();
|
|
port_unlock_from_isr();
|
|
}
|
|
|
|
#endif /* _CHSYS_H_ */
|
|
|
|
/** @} */
|