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.

1 files changed, 28 insertions, 0 deletions

diff --git a/cpukit/libcsupport/src/cachealignedalloc.c b/cpukit/libcsupport/src/cachealignedalloc.c
new file mode 100644
index 0000000000..a704859dbe
--- /dev/null
+++ b/cpukit/libcsupport/src/cachealignedalloc.c
@@ -0,0 +1,28 @@
+/*
+ *  RTEMS Cache Aligned Malloc
+ *
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <rtems.h>
+#include <rtems/malloc.h>
+
+void *rtems_cache_aligned_malloc( size_t nbytes )
+{
+  size_t line_size = rtems_cache_get_data_line_size();
+
+  if ( line_size > 0 ) {
+    /* Assume that the cache line size is a power of two */
+    size_t m = line_size - 1;
+
+    nbytes = (nbytes + m) & ~m;
+  }
+
+  return rtems_heap_allocate_aligned_with_boundary( nbytes, line_size, 0 );
+}