score: Add Memory Handler

Update #3838.

1 files changed, 67 insertions, 0 deletions

diff --git a/cpukit/score/src/memoryallocate.c b/cpukit/score/src/memoryallocate.c
new file mode 100644
index 0000000000..73de49d28c
--- /dev/null
+++ b/cpukit/score/src/memoryallocate.c
@@ -0,0 +1,67 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2018, 2019 embedded brains GmbH
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/score/memory.h>
+
+void *_Memory_Allocate(
+  const Memory_Information *information,
+  uintptr_t                 size,
+  uintptr_t                 alignment
+)
+{
+  Memory_Area       *area;
+  const Memory_Area *end;
+  uintptr_t          alignment_mask;
+
+  area = &information->areas[ 0 ];
+  end = &information->areas[ information->count ];
+  alignment_mask = alignment - 1;
+
+  while ( area != end ) {
+    uintptr_t alloc_begin;
+    uintptr_t alloc_end;
+
+    alloc_begin = (uintptr_t) area->free;
+    alloc_begin += alignment_mask;
+    alloc_begin &= ~alignment_mask;
+    alloc_end = alloc_begin + size;
+
+    if ( alloc_begin <= alloc_end && alloc_end <= (uintptr_t) area->end ) {
+      area->free = (void *) alloc_end;
+
+      return (void *) alloc_begin;
+    }
+
+    ++area;
+  }
+
+  return NULL;
+}