forked from Imagelibrary/rtems
eb3af275ea
There is need for unambiguous named and defined cache function which should be called when code is updated, loaded or is self-modifying. There should be function to obtain maximal cache line length as well. This function can and should be used for allocations which can be used for data and or code and ensures that there are no partial cache lines overlaps on start and end of allocated region. Updates #2782
29 lines
677 B
C
29 lines
677 B
C
/*
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* RTEMS Cache Aligned Malloc
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*
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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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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <rtems.h>
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#include <rtems/malloc.h>
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void *rtems_cache_aligned_malloc( size_t nbytes )
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{
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size_t line_size = rtems_cache_get_maximal_line_size();
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if ( line_size > 0 ) {
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/* Assume that the cache line size is a power of two */
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size_t m = line_size - 1;
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nbytes = (nbytes + m) & ~m;
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}
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return rtems_heap_allocate_aligned_with_boundary( nbytes, line_size, 0 );
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}
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