128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/*
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* File : irq.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2006-02-24 Bernard first version
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* 2006-05-03 Bernard add IRQ_DEBUG
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* 2016-08-09 ArdaFu add interrupt enter and leave hook.
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#ifdef RT_USING_HOOK
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static void (*rt_interrupt_enter_hook)(void);
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static void (*rt_interrupt_leave_hook)(void);
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/**
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* @ingroup Hook
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* This function set a hook function when the system enter a interrupt
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*
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* @note the hook function must be simple and never be blocked or suspend.
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*/
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void rt_interrupt_enter_sethook(void (*hook)(void))
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{
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rt_interrupt_enter_hook = hook;
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}
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/**
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* @ingroup Hook
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* This function set a hook function when the system exit a interrupt.
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*
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* @note the hook function must be simple and never be blocked or suspend.
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*/
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void rt_interrupt_leave_sethook(void (*hook)(void))
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{
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rt_interrupt_leave_hook = hook;
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}
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#endif
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/* #define IRQ_DEBUG */
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/**
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* @addtogroup Kernel
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*/
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/**@{*/
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volatile rt_uint8_t rt_interrupt_nest;
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/**
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* This function will be invoked by BSP, when enter interrupt service routine
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*
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* @note please don't invoke this routine in application
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*
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* @see rt_interrupt_leave
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*/
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void rt_interrupt_enter(void)
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{
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rt_base_t level;
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RT_DEBUG_LOG(RT_DEBUG_IRQ, ("irq coming..., irq nest:%d\n",
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rt_interrupt_nest));
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level = rt_hw_interrupt_disable();
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rt_interrupt_nest ++;
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RT_OBJECT_HOOK_CALL(rt_interrupt_enter_hook,());
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rt_hw_interrupt_enable(level);
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}
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RTM_EXPORT(rt_interrupt_enter);
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/**
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* This function will be invoked by BSP, when leave interrupt service routine
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*
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* @note please don't invoke this routine in application
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*
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* @see rt_interrupt_enter
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*/
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void rt_interrupt_leave(void)
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{
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rt_base_t level;
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RT_DEBUG_LOG(RT_DEBUG_IRQ, ("irq leave, irq nest:%d\n",
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rt_interrupt_nest));
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level = rt_hw_interrupt_disable();
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rt_interrupt_nest --;
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RT_OBJECT_HOOK_CALL(rt_interrupt_leave_hook,());
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rt_hw_interrupt_enable(level);
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}
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RTM_EXPORT(rt_interrupt_leave);
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/**
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* This function will return the nest of interrupt.
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*
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* User application can invoke this function to get whether current
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* context is interrupt context.
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*
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* @return the number of nested interrupts.
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*/
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rt_uint8_t rt_interrupt_get_nest(void)
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{
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return rt_interrupt_nest;
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}
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RTM_EXPORT(rt_interrupt_get_nest);
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RTM_EXPORT(rt_hw_interrupt_disable);
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RTM_EXPORT(rt_hw_interrupt_enable);
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/**@}*/
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