forked from Imagelibrary/rtems
59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* void Shm_Convert_packet( &packet )
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*
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* This routine is the shared memory locked queue MPCI driver routine
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* used to convert the RTEMS's information in a packet from non-native
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* format to processor native format.
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*
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* Input parameters:
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* packet - pointer to a packet
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*
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* Output parameters:
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* *packet - packet in native format
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*
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* NOTE: Message buffers are not manipulated.
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* Endian conversion is currently the only conversion.
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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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 OWNER 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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#include <rtems.h>
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#include "shm_driver.h"
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void Shm_Convert_packet(
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rtems_packet_prefix *packet
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)
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{
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uint32_t *pkt, i;
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pkt = (uint32_t*) packet;
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for ( i=RTEMS_MINIMUN_HETERO_CONVERSION ; i ; i--, pkt++ )
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*pkt = CPU_swap_u32( *pkt );
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for ( i=packet->to_convert ; i ; i--, pkt++ )
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*pkt = CPU_swap_u32( *pkt );
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}
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