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/****************************************************************************
* arch/z80/src/common/up_doirq.c
*
* Copyright (C) 2007-2009, 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <stdint.h>
#include <assert.h>
#include "up_arch.h"
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include "chip/switch.h"
#include "up_internal.h"
#include "group/group.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
FAR chipreg_t *up_doirq(uint8_t irq, FAR chipreg_t *regs)
{
board_led_on(LED_INIRQ);
#ifdef CONFIG_SUPPRESS_INTERRUPTS
lowsyslog(LOG_ERR, "Unexpected IRQ\n");
IRQ_ENTER(regs);
PANIC();
return NULL; /* Won't get here */
#else
#ifdef CONFIG_ARCH_ADDRENV
FAR chipreg_t *newregs;
#endif
if (irq < NR_IRQS)
{
DECL_SAVESTATE();
/* Indicate that we have entered IRQ processing logic */
IRQ_ENTER(irq, regs);
/* Deliver the IRQ */
irq_dispatch(irq, regs);
#ifdef CONFIG_ARCH_ADDRENV
/* If a context switch occurred, 'newregs' will hold the new context */
newregs = IRQ_STATE();
if (newregs != regs)
{
/* Make sure that the address environment for the previously
* running task is closed down gracefully and set up the
* address environment for the new thread at the head of the
* ready-to-run list.
*/
(void)group_addrenv(NULL);
}
regs = newregs;
#else
/* If a context switch occurred, 'regs' will hold the new context */
regs = IRQ_STATE();
#endif
/* Indicate that we are no longer in interrupt processing logic */
IRQ_LEAVE(irq);
}
board_led_off(LED_INIRQ);
return regs;
#endif
}
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