8220b169f3
modified various intel64 files to support SMP Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/****************************************************************************
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* arch/x86_64/src/common/x86_64_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 <sched.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.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 "x86_64_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 to exist.
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* This is a special case of task_delete() where the task to be deleted is
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* the currently executing task. It is more complex because a context
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* 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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struct tcb_s *tcb;
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/* Make sure that we are in a critical section with local interrupts.
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* The IRQ state will be restored when the next task is started.
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*/
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enter_critical_section();
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nxsched_dumponexit();
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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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/* Adjusts time slice for SCHED_RR & SCHED_SPORADIC cases
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* NOTE: the API also adjusts the global IRQ control for SMP
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*/
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nxsched_resume_scheduler(tcb);
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/* Context switch, rearrange MMU */
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x86_64_restore_auxstate(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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/* Restore the cpu lock */
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restore_critical_section();
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/* Then switch contexts */
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x86_64_fullcontextrestore(tcb->xcp.regs);
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/* x86_64_fullcontextrestore() should not return but could if the software
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* interrupts are disabled.
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*/
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PANIC();
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}
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