119 lines
4.3 KiB
C
119 lines
4.3 KiB
C
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/****************************************************************************
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* arch/hc/src/common/up_doirq.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 <stdint.h>
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#include <assert.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "os_internal.h"
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#include "up_internal.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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uint8_t *up_doirq(int irq, uint8_t *regs)
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{
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up_ledon(LED_INIRQ);
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#ifdef CONFIG_SUPPRESS_INTERRUPTS
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PANIC(OSERR_ERREXCEPTION);
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#else
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/* Nested interrupts are not supported in this implementation. If you want
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* implemented nested interrupts, you would have to (1) change the way that
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* current regs is handled and (2) the design associated with
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* CONFIG_ARCH_INTERRUPTSTACK.
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*/
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/* Current regs non-zero indicates that we are processing an interrupt;
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* current_regs is also used to manage interrupt level context switches.
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*/
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DEBUGASSERT(current_regs == NULL);
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current_regs = regs;
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/* Mask and acknowledge the interrupt */
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up_maskack_irq(irq);
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/* Deliver the IRQ */
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irq_dispatch(irq, regs);
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/* If a context switch occurred while processing the interrupt then
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* current_regs may have change value. If we return any value different
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* from the input regs, then the lower level will know that a context
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* switch occurred during interrupt processing.
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*/
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regs = current_regs;
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/* Indicate that we are no long in an interrupt handler */
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current_regs = NULL;
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/* Unmask the last interrupt (global interrupts are still disabled) */
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up_enable_irq(irq);
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#endif
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up_ledoff(LED_INIRQ);
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return regs;
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}
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