128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/****************************************************************************
|
|
* arch/arm/src/armv7-a/arm_doirq.c
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <assert.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/addrenv.h>
|
|
#include <nuttx/irq.h>
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/board.h>
|
|
#include <arch/board/board.h>
|
|
#include <sched/sched.h>
|
|
|
|
#include "arm_internal.h"
|
|
#include "gic.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: arm_doirq
|
|
*
|
|
* Description:
|
|
* Receives the decoded GIC interrupt information and dispatches control
|
|
* to the attached interrupt handler.
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint32_t *arm_doirq(int irq, uint32_t *regs)
|
|
{
|
|
struct tcb_s *tcb = this_task();
|
|
|
|
board_autoled_on(LED_INIRQ);
|
|
#ifdef CONFIG_SUPPRESS_INTERRUPTS
|
|
PANIC();
|
|
#else
|
|
/* Nested interrupts are not supported */
|
|
|
|
DEBUGASSERT(!up_interrupt_context());
|
|
|
|
/* if irq == GIC_SMP_CPUSTART
|
|
* We are initiating the multi-core jumping state to up_idle,
|
|
* and we will use this_task(). Therefore, it cannot be overridden.
|
|
*/
|
|
|
|
#ifdef CONFIG_SMP
|
|
if (irq != GIC_SMP_CPUSTART)
|
|
#endif
|
|
{
|
|
tcb->xcp.regs = regs;
|
|
}
|
|
|
|
/* Set irq flag */
|
|
|
|
up_set_interrupt_context(true);
|
|
|
|
/* Deliver the IRQ */
|
|
|
|
irq_dispatch(irq, regs);
|
|
tcb = this_task();
|
|
|
|
if (regs != tcb->xcp.regs)
|
|
{
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
/* Make sure that the address environment for the previously
|
|
* running task is closed down gracefully (data caches dump,
|
|
* MMU flushed) and set up the address environment for the new
|
|
* thread at the head of the ready-to-run list.
|
|
*/
|
|
|
|
addrenv_switch(tcb);
|
|
#endif
|
|
|
|
/* Update scheduler parameters */
|
|
|
|
nxsched_suspend_scheduler(g_running_tasks[this_cpu()]);
|
|
nxsched_resume_scheduler(tcb);
|
|
|
|
/* Record the new "running" task when context switch occurred.
|
|
* g_running_tasks[] is only used by assertion logic for reporting
|
|
* crashes.
|
|
*/
|
|
|
|
g_running_tasks[this_cpu()] = tcb;
|
|
regs = tcb->xcp.regs;
|
|
}
|
|
|
|
/* Set irq flag */
|
|
|
|
up_set_interrupt_context(false);
|
|
#endif
|
|
|
|
board_autoled_off(LED_INIRQ);
|
|
|
|
/* (*running_task)->xcp.regs is about to become invalid
|
|
* and will be marked as NULL to avoid misusage.
|
|
*/
|
|
|
|
tcb->xcp.regs = NULL;
|
|
return regs;
|
|
}
|