From 1cb925717e77910ef5250c83e0d03f13285f33a8 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Tue, 10 Dec 2019 20:03:53 +0100 Subject: score: Add Memory Handler Update #3838. --- cpukit/score/src/memoryallocate.c | 67 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 cpukit/score/src/memoryallocate.c (limited to 'cpukit/score/src/memoryallocate.c') 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 + +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; +} -- cgit v1.2.3