33e30239f1
reason: In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to simplify the implementation of critical sections. The goal is to enable spin_lock_irqsave to encapsulate critical sections, thereby facilitating the replacement of critical sections(big lock) with smaller spin_lock_irqsave(small lock) Signed-off-by: hujun5 <hujun5@xiaomi.com>
88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/****************************************************************************
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* arch/z80/src/common/z80_exit.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 <sched.h>
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#include <debug.h>
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#include <nuttx/addrenv.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.h>
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#include "chip.h"
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#include "task/task.h"
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#include "sched/sched.h"
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#include "group/group.h"
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#include "z80_internal.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_exit
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*
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* Description:
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* This function causes the currently executing task to cease
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* to exist. This is a special case of task_delete() where the task to
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* be deleted is the currently executing task. It is more complex because
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* a context switch must be perform to the next ready to run task.
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*
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****************************************************************************/
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void up_exit(int status)
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{
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FAR struct tcb_s *tcb = this_task();
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/* Destroy the task at the head of the ready to run list. */
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nxtask_exit();
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/* Now, perform the context switch to the new ready-to-run task at the
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* head of the list.
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*/
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tcb = this_task();
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sinfo("New Active Task TCB=%p\n", tcb);
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/* Adjusts time slice for SCHED_RR & SCHED_SPORADIC cases */
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nxsched_resume_scheduler(tcb);
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#ifdef CONFIG_ARCH_ADDRENV
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/* Make sure that the address environment for the previously running
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* task is closed down gracefully (data caches dump, MMU flushed) and
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* set up the address environment for the new thread at the head of
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* the ready-to-run list.
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*/
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addrenv_switch(tcb);
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#endif
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/* Then switch contexts */
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RESTORE_USERCONTEXT(tcb);
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}
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