mirror of
https://github.com/zephyrproject-rtos/zephyr
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ec554f44d9
Just like with _Swap(), we need two variants of these utilities which can atomically release a lock and context switch. The naming shifts (for byte count reasons) to _reschedule/_pend_curr, and both have an _irqlock variant which takes the traditional locking. Just refactoring. No logic changes. Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
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* Copyright (c) 2016 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief ARM Cortex-M k_thread_abort() routine
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*
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* The ARM Cortex-M architecture provides its own k_thread_abort() to deal
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* with different CPU modes (handler vs thread) when a thread aborts. When its
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* entry point returns or when it aborts itself, the CPU is in thread mode and
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* must call _Swap() (which triggers a service call), but when in handler
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* mode, the CPU must exit handler mode to cause the context switch, and thus
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* must queue the PendSV exception.
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*/
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#include <kernel.h>
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#include <kernel_structs.h>
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <ksched.h>
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#include <kswap.h>
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#include <wait_q.h>
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#include <misc/__assert.h>
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extern void _k_thread_single_abort(struct k_thread *thread);
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void _impl_k_thread_abort(k_tid_t thread)
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{
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unsigned int key;
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key = irq_lock();
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__ASSERT(!(thread->base.user_options & K_ESSENTIAL),
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"essential thread aborted");
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_k_thread_single_abort(thread);
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_thread_monitor_exit(thread);
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if (_current == thread) {
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if ((SCB->ICSR & SCB_ICSR_VECTACTIVE_Msk) == 0) {
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(void)_Swap_irqlock(key);
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CODE_UNREACHABLE;
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} else {
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SCB->ICSR |= SCB_ICSR_PENDSVSET_Msk;
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}
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}
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/* The abort handler might have altered the ready queue. */
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_reschedule_irqlock(key);
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}
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