hujun260 commented on code in PR #13018: URL: https://github.com/apache/nuttx/pull/13018#discussion_r1730629525
########## sched/irq/irq_attach_thread.c: ########## @@ -0,0 +1,215 @@ +/**************************************************************************** + * sched/irq/irq_attach_thread.c + * + * 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 <errno.h> +#include <stdio.h> + +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <nuttx/kthread.h> + +#include "irq/irq.h" +#include "sched/sched.h" + +/**************************************************************************** + * Privte Types + ****************************************************************************/ + +/* This is the type of the list of interrupt handlers, one for each IRQ. + * This type provided all of the information necessary to irq_dispatch to + * transfer control to interrupt handlers after the occurrence of an + * interrupt. + */ + +struct irq_thread_info_s +{ + xcpt_t handler; /* Address of the interrupt handler */ + FAR void *arg; /* The argument provided to the interrupt handler. */ + sem_t *sem; /* irq sem used to notify irq thread */ +}; + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static int g_irq_thread_vector[NR_IRQS]; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/* Default interrupt handler for threaded interrupts. + * Useful for oneshot interrupts. + */ + +static int irq_default_handler(int irq, FAR void *regs, FAR void *arg) +{ + FAR struct irq_thread_info_s *irq_info = arg; + int ret = IRQ_WAKE_THREAD; + xcpt_t vector; + + vector = irq_info->handler; + + if (vector) + { + ret = vector(irq, regs, irq_info->arg); + } + + if (ret == IRQ_WAKE_THREAD) + { + nxsem_post(irq_info->sem); + ret = OK; + } + + return ret; +} + +static int isr_thread_main(int argc, FAR char *argv[]) +{ + unsigned int irq = atoi(argv[1]); + xcpt_t vector = (xcpt_t)((uintptr_t)strtoul(argv[2], NULL, 16)); + xcpt_t handler = (xcpt_t)((uintptr_t)strtoul(argv[3], NULL, 16)); + FAR void *arg = (FAR void *)((uintptr_t)strtoul(argv[4], NULL, 16)); + struct irq_thread_info_s irq_info; + sem_t sem; + + irq_info.sem = &sem; + irq_info.arg = arg; + irq_info.handler = handler; + + nxsem_init(&sem, 0, 0); + + irq_attach(irq, irq_default_handler, &irq_info); + +#if !defined(CONFIG_ARCH_NOINTC) + up_enable_irq(irq); Review Comment: Due to the optimization of g_irq_thread_vector, results in a delayed invocation of irq_attach. Consequently, the up_enable_irq must also be delayed. A note has been added to document this behavior. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
