60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
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/**
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* Copyright (c) 2024 Intel Corporation
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <kswap.h>
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#include <ksched.h>
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#include <ipi.h>
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#ifdef CONFIG_TRACE_SCHED_IPI
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extern void z_trace_sched_ipi(void);
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#endif
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void flag_ipi(void)
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{
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#if defined(CONFIG_SCHED_IPI_SUPPORTED)
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if (arch_num_cpus() > 1) {
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_kernel.pending_ipi = true;
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}
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#endif /* CONFIG_SCHED_IPI_SUPPORTED */
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}
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void signal_pending_ipi(void)
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{
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/* Synchronization note: you might think we need to lock these
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* two steps, but an IPI is idempotent. It's OK if we do it
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* twice. All we require is that if a CPU sees the flag true,
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* it is guaranteed to send the IPI, and if a core sets
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* pending_ipi, the IPI will be sent the next time through
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* this code.
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*/
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#if defined(CONFIG_SCHED_IPI_SUPPORTED)
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if (arch_num_cpus() > 1) {
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if (_kernel.pending_ipi) {
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_kernel.pending_ipi = false;
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arch_sched_ipi();
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}
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}
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#endif /* CONFIG_SCHED_IPI_SUPPORTED */
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}
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void z_sched_ipi(void)
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{
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/* NOTE: When adding code to this, make sure this is called
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* at appropriate location when !CONFIG_SCHED_IPI_SUPPORTED.
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*/
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#ifdef CONFIG_TRACE_SCHED_IPI
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z_trace_sched_ipi();
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#endif /* CONFIG_TRACE_SCHED_IPI */
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#ifdef CONFIG_TIMESLICING
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if (sliceable(_current)) {
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z_time_slice();
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}
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#endif /* CONFIG_TIMESLICING */
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}
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