8f39ba6ae4
When supporting high-priority interrupts, updating the g_running_tasks within a high-priority interrupt may be cause problems. The g_running_tasks should only be updated when it is determined that a task context switch has occurred. Signed-off-by: zhangyuan21 <zhangyuan21@xiaomi.com>
131 lines
4.3 KiB
C
131 lines
4.3 KiB
C
/****************************************************************************
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* arch/renesas/src/common/renesas_doirq.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <nuttx/board.h>
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#include <arch/board/board.h>
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#include <sched/sched.h>
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#include "renesas_internal.h"
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#include "group/group.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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uint32_t *renesas_doirq(int irq, uint32_t * regs)
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{
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board_autoled_on(LED_INIRQ);
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#ifdef CONFIG_SUPPRESS_INTERRUPTS
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PANIC();
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#else
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if ((unsigned)irq < NR_IRQS)
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{
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/* Current regs non-zero indicates that we are processing
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* an interrupt; g_current_regs is also used to manage
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* interrupt level context switches.
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*
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* Nested interrupts are not supported.
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*/
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DEBUGASSERT(g_current_regs == NULL);
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g_current_regs = regs;
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/* Deliver the IRQ */
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irq_dispatch(irq, regs);
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/* Check for a context switch. If a context switch occurred, then
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* g_current_regs will have a different value than it did on entry.
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* If an interrupt level context switch has occurred, then restore the
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* floating point state and the establish the correct address
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* environment before returning from the interrupt.
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*/
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if (regs != g_current_regs)
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{
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#ifdef CONFIG_ARCH_FPU
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/* Restore floating point registers */
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up_restorefpu((uint32_t *)g_current_regs);
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#endif
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#ifdef CONFIG_ARCH_ADDRENV
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/* Make sure that the address environment for the previously
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* running task is closed down gracefully (data caches dump,
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* MMU flushed) and set up the address environment for the new
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* thread at the head of the ready-to-run list.
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*/
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addrenv_switch(NULL);
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#endif
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/* Record the new "running" task when context switch occurred.
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* g_running_tasks[] is only used by assertion logic for reporting
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* crashes.
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*/
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g_running_tasks[this_cpu()] = this_task();
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}
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/* Get the current value of regs... it may have changed because
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* of a context switch performed during interrupt processing.
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*/
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regs = (uint32_t *)g_current_regs;
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/* Set g_current_regs to NULL to indicate that we are no longer in an
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* interrupt handler.
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*/
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g_current_regs = NULL;
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}
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board_autoled_off(LED_INIRQ);
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#endif
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return regs;
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}
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