125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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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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* 2018-11-22 Jesven rt_interrupt_get_nest function add disable irq
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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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#ifdef RT_USING_SMP
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#define rt_interrupt_nest rt_cpu_self()->irq_nest
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#else
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volatile rt_uint8_t rt_interrupt_nest = 0;
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#endif
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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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rt_uint8_t ret;
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rt_base_t level;
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level = rt_hw_interrupt_disable();
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ret = rt_interrupt_nest;
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rt_hw_interrupt_enable(level);
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return ret;
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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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