74c8852d05
This change removes the internal number-to-function mapping of microkernel services. Instead, function pointers are used to specify which service to use. This is in preparation for private kernel objects. Before this, only kernel objects that are defined in MDEF files would have corresponding functions included in the final binary, via sysgen by populating an array of number-to-function mapping. This causes an issue when a certain type of objects are all defined with source code, and never in MDEF file. The corresponding mapping would be deleted, and the functions are never included in the binary. For example, if no mutexes are defined in MDEF file, the _k_mutex_*() functions would not be included. With this change, any usage of private kernel objects will hint to the linker that those functions are needed, and should not be removed from final binary. Change-Id: If48864abcd6471bcb7964ec00fe668bcabe3239b Signed-off-by: Daniel Leung <daniel.leung@intel.com>
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/* "do nothing" kernel service */
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/*
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* Copyright (c) 1997-2014 Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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DESCRIPTION
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This module provides a "do nothing" kernel service.
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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_swapper 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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ARG_UNUSED(A);
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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_swapper 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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