mirror of
https://github.com/zephyrproject-rtos/zephyr
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59c21a5f62
Adds support that allows fibers and ISRs to invoke the microkernel no-op kernel service request. This is useful for cases when the nanokernel needs to invoke the microkernel task scheduler. Change-Id: I1f4b2a39ac6b5e44bb1b6c6b3cd6034262bbada8 Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/*
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* Copyright (c) 1997-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief "do nothing" kernel service
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*
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* This module provides a "do nothing" kernel service.
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*
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* This service is primarily used by other kernel services that need a way to
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* resume the execution of a kernel request that could not be completed in a
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* single invocation of the _k_server fiber. However, it can also be used by
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* a task to measure the overhead involved in issuing a kernel service request.
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*/
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#include <micro_private.h>
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#include <toolchain.h>
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#include <sections.h>
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/**
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*
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* @brief Perform "do nothing" kernel request
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*
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* @return N/A
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*/
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void _k_nop(struct k_args *A)
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{
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if (A->alloc) {
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FREEARGS(A);
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}
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}
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/**
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*
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* @brief "do nothing" kernel request
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*
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* This routine is a request for the _k_server to run a "do nothing" routine.
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*
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* @return N/A
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*/
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void _task_nop(void)
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{
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struct k_args A;
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A.Comm = _K_SVC_NOP;
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KERNEL_ENTRY(&A);
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}
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/**
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* @brief "do nothing" kernel request
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*
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* This routine is a request for the _k_server to run a "do nothing" routine.
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* It is invoked by the nanokernel internals to trigger the microkernel task
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* scheduler.
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*
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* @return N/A
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*/
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void _nano_nop(void)
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{
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struct k_args *A;
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GETARGS(A);
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A->Comm = _K_SVC_NOP;
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A->alloc = true;
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SENDARGS(A);
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}
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