]> git.ipfire.org Git - people/ms/u-boot.git/blob - common/malloc_simple.c
malloc: work around some memalign fragmentation issues
[people/ms/u-boot.git] / common / malloc_simple.c
1 /*
2 * Simple malloc implementation
3 *
4 * Copyright (c) 2014 Google, Inc
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <malloc.h>
11 #include <mapmem.h>
12 #include <asm/io.h>
13
14 DECLARE_GLOBAL_DATA_PTR;
15
16 void *malloc_simple(size_t bytes)
17 {
18 ulong new_ptr;
19 void *ptr;
20
21 new_ptr = gd->malloc_ptr + bytes;
22 debug("%s: size=%zx, ptr=%lx, limit=%lx\n", __func__, bytes, new_ptr,
23 gd->malloc_limit);
24 if (new_ptr > gd->malloc_limit)
25 return NULL;
26 ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes);
27 gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
28
29 return ptr;
30 }
31
32 void *memalign_simple(size_t align, size_t bytes)
33 {
34 ulong addr, new_ptr;
35 void *ptr;
36
37 addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align);
38 new_ptr = addr + bytes - gd->malloc_base;
39 if (new_ptr > gd->malloc_limit)
40 return NULL;
41 ptr = map_sysmem(addr, bytes);
42 gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
43
44 return ptr;
45 }
46
47 #if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE)
48 void *calloc(size_t nmemb, size_t elem_size)
49 {
50 size_t size = nmemb * elem_size;
51 void *ptr;
52
53 ptr = malloc(size);
54 memset(ptr, '\0', size);
55
56 return ptr;
57 }
58 #endif