source: rtems/cpukit/libcsupport/src/cachealignedalloc.c @ 7e5c9b89

4.115
Last change on this file since 7e5c9b89 was 7e5c9b89, checked in by Sebastian Huber <sebastian.huber@…>, on 11/25/14 at 13:58:13

rtems: Move rtems_cache_aligned_malloc()

Make sure also the size is cache aligned since otherwise we may have
some overlap with the next allocation block. A cache invalidate on this
area would be fatal.
  • Property mode set to 100644
File size: 674 bytes
Line 
1/*
2 *  RTEMS Cache Aligned Malloc
3 *
4 *
5 *  COPYRIGHT (c) 1989-1999.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.rtems.org/license/LICENSE.
11 */
12
13#include <rtems.h>
14#include <rtems/malloc.h>
15
16void *rtems_cache_aligned_malloc( size_t nbytes )
17{
18  size_t line_size = rtems_cache_get_data_line_size();
19
20  if ( line_size > 0 ) {
21    /* Assume that the cache line size is a power of two */
22    size_t m = line_size - 1;
23
24    nbytes = (nbytes + m) & ~m;
25  }
26
27  return rtems_heap_allocate_aligned_with_boundary( nbytes, line_size, 0 );
28}
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