/**************************************************************************** * sched/irq/irq_dispatch.c * * Copyright (C) 2007, 2008, 2017-2018 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include "irq/irq.h" #include "clock/clock.h" #include "sched/sched.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* INCR_COUNT - Increment the count of interrupts taken on this IRQ number */ #ifdef CONFIG_SCHED_IRQMONITOR # ifdef CONFIG_HAVE_LONG_LONG # define INCR_COUNT(ndx) \ do \ { \ g_irqvector[ndx].count++; \ } \ while (0) # else # define INCR_COUNT(ndx) \ do \ { \ if (++g_irqvector[ndx].lscount == 0) \ { \ g_irqvector[ndx].mscount++; \ } \ } \ while (0) # endif #else # define INCR_COUNT(ndx) #endif /* CALL_VECTOR - Call the interrupt service routine attached to this interrupt * request */ #undef HAVE_PLATFORM_GETTIME #if defined(CONFIG_SCHED_IRQMONITOR) && \ (!defined(CONFIG_SCHED_TICKLESS) || \ defined(CONFIG_SCHED_CRITMONITOR) || \ defined(CONFIG_SCHED_IRQMONITOR_GETTIME)) # define HAVE_PLATFORM_GETTIME 1 #endif #ifdef CONFIG_SCHED_IRQMONITOR #ifdef HAVE_PLATFORM_GETTIME # define CALL_VECTOR(ndx, vector, irq, context, arg) \ do \ { \ struct timespec delta; \ uint32_t start; \ uint32_t elapsed; \ start = up_critmon_gettime(); \ vector(irq, context, arg); \ elapsed = up_critmon_gettime() - start; \ up_critmon_convert(elapsed, &delta); \ if (delta.tv_nsec > g_irqvector[ndx].time) \ { \ g_irqvector[ndx].time = delta.tv_nsec; \ } \ } \ while (0) #else # define CALL_VECTOR(ndx, vector, irq, context, arg) \ do \ { \ struct timespec start; \ struct timespec end; \ struct timespec delta; \ clock_systimespec(&start); \ vector(irq, context, arg); \ clock_systimespec(&end); \ clock_timespec_subtract(&end, &start, &delta); \ if (delta.tv_nsec > g_irqvector[ndx].time) \ { \ g_irqvector[ndx].time = delta.tv_nsec; \ } \ } \ while (0) #endif /* HAVE_PLATFORM_GETTIME */ #else # define CALL_VECTOR(ndx, vector, irq, context, arg) \ vector(irq, context, arg) #endif /* CONFIG_SCHED_IRQMONITOR */ /**************************************************************************** * External Function Prototypes ****************************************************************************/ #ifdef HAVE_PLATFORM_GETTIME /* If CONFIG_SCHED_TICKLESS is enabled, then the high resolution Tickless * timer will be used. Otherwise, the platform specific logic must provide * the following in order to support high resolution timing: */ uint32_t up_critmon_gettime(void); void up_critmon_convert(uint32_t elapsed, FAR struct timespec *ts); /* The first interface simply provides the current time value in unknown * units. NOTE: This function may be called early before the timer has * been initialized. In that event, the function should just return a * start time of zero. * * Nothing is assumed about the units of this time value. The following * are assumed, however: (1) The time is an unsigned integer value, (2) * the time is monotonically increasing, and (3) the elapsed time (also * in unknown units) can be obtained by subtracting a start time from * the current time. * * The second interface simple converts an elapsed time into well known * units. */ #endif /* HAVE_PLATFORM_GETTIME */ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: irq_dispatch * * Description: * This function must be called from the architecture-specific logic in * order to dispatch an interrupt to the appropriate, registered handling * logic. * ****************************************************************************/ void irq_dispatch(int irq, FAR void *context) { xcpt_t vector = irq_unexpected_isr; FAR void *arg = NULL; unsigned int ndx = irq; #if NR_IRQS > 0 if ((unsigned)irq < NR_IRQS) { #ifdef CONFIG_ARCH_MINIMAL_VECTORTABLE ndx = g_irqmap[irq]; if (ndx < CONFIG_ARCH_NUSER_INTERRUPTS) { if (g_irqvector[ndx].handler) { vector = g_irqvector[ndx].handler; arg = g_irqvector[ndx].arg; } INCR_COUNT(ndx); } #else if (g_irqvector[ndx].handler) { vector = g_irqvector[ndx].handler; arg = g_irqvector[ndx].arg; } INCR_COUNT(ndx); #endif } #endif #ifdef CONFIG_CRYPTO_RANDOM_POOL_COLLECT_IRQ_RANDOMNESS /* Add interrupt timing randomness to entropy pool */ add_irq_randomness(irq); #endif /* Then dispatch to the interrupt handler */ CALL_VECTOR(ndx, vector, irq, context, arg); UNUSED(ndx); /* Record the new "running" task. g_running_tasks[] is only used by * assertion logic for reporting crashes. */ g_running_tasks[this_cpu()] = this_task(); }