source: mainline/kernel/generic/include/main/main.h@ b60615bd

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since b60615bd was b60615bd, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 7 years ago

Modify kernel malloc()

This new implementation places the allocation size in front of the allocated
object, instead of relying on the slab allocator being able to determine source
slab cache for an object. This should improve scalability and help reduce
complexity of the memory management subsystem (further changes coming).

The drawback is more memory consumed by small malloc() allocations, however that
can be mitigated by switching to an API where the user provides known object
size to deallocation (most users know it either statically or from length they
necessarily remember).

  • Property mode set to 100644
File size: 1.8 KB
RevLine 
[deaa22f]1/*
[df4ed85]2 * Copyright (c) 2006 Martin Decky
[deaa22f]3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
[e88eb48]29/** @addtogroup kernel_generic
[deaa22f]30 * @{
31 */
32/** @file
33 */
[7a0359b]34
[06e1e95]35#ifndef KERN_MAIN_H_
36#define KERN_MAIN_H_
[deaa22f]37
[d99c1d2]38#include <typedefs.h>
[4b241f3]39
[8a1afd2]40/* Address of the start of the kernel image. */
41extern uint8_t kernel_load_address[];
42/* Address of the end of kernel. */
43extern uint8_t kdata_end[];
44
[deaa22f]45extern uintptr_t stack_safe;
46
[4b241f3]47extern void main_bsp(void);
48extern void main_ap(void);
49
[b60615bd]50extern void malloc_init(void);
51
[deaa22f]52#endif
53
54/** @}
55 */
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