139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/****************************************************************************
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* sched/irq/irq_dispatch.c
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*
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* Copyright (C) 2007, 2008, 2017-2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.h>
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#include <nuttx/random.h>
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#include "irq/irq.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifdef CONFIG_SCHED_IRQMONITOR
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# ifdef CONFIG_HAVE_LONG_LONG
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# define INCR_COUNT(ndx) \
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do \
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{ \
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g_irqvector[ndx].count++; \
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} \
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while (0)
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# else
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# define INCR_COUNT(ndx) \
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do \
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{ \
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if (++g_irqvector[ndx].lscount == 0) \
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{ \
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g_irqvector[ndx].mscount++; \
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} \
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} \
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while (0)
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# endif
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#else
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# define INCR_COUNT(ndx)
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: irq_dispatch
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*
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* Description:
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* This function must be called from the architecture-specific logic in
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* order to dispatch an interrupt to the appropriate, registered handling
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* logic.
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*
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****************************************************************************/
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void irq_dispatch(int irq, FAR void *context)
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{
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xcpt_t vector;
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FAR void *arg;
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/* Perform some sanity checks */
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#if NR_IRQS > 0
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if ((unsigned)irq >= NR_IRQS)
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{
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vector = irq_unexpected_isr;
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arg = NULL;
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}
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else
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{
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#ifdef CONFIG_ARCH_MINIMAL_VECTORTABLE
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irq_mapped_t ndx = g_irqmap[irq];
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if (ndx >= CONFIG_ARCH_NUSER_INTERRUPTS)
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{
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vector = irq_unexpected_isr;
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arg = NULL;
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}
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else
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{
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vector = g_irqvector[ndx].handler;
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arg = g_irqvector[ndx].arg;
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INCR_COUNT(ndx);
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}
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#else
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vector = g_irqvector[irq].handler;
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arg = g_irqvector[irq].arg;
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INCR_COUNT(irq);
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#endif
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}
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#else
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vector = irq_unexpected_isr;
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arg = NULL;
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#endif
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#ifdef CONFIG_CRYPTO_RANDOM_POOL_COLLECT_IRQ_RANDOMNESS
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/* Add interrupt timing randomness to entropy pool */
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add_irq_randomness(irq);
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#endif
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/* Then dispatch to the interrupt handler */
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vector(irq, context, arg);
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}
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