1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Simple malloc implementation
4 *
5 * Copyright (c) 2014 Google, Inc
6 */
7
8 #define LOG_CATEGORY LOGC_ALLOC
9
10 #include <common.h>
11 #include <malloc.h>
12 #include <mapmem.h>
13 #include <asm/io.h>
14
15 DECLARE_GLOBAL_DATA_PTR;
16
alloc_simple(size_t bytes,int align)17 static void *alloc_simple(size_t bytes, int align)
18 {
19 ulong addr, new_ptr;
20 void *ptr;
21
22 addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align);
23 new_ptr = addr + bytes - gd->malloc_base;
24 log_debug("size=%zx, ptr=%lx, limit=%lx: ", bytes, new_ptr,
25 gd->malloc_limit);
26 if (new_ptr > gd->malloc_limit) {
27 log_err("alloc space exhausted\n");
28 return NULL;
29 }
30
31 ptr = map_sysmem(addr, bytes);
32 gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
33
34 return ptr;
35 }
36
malloc_simple(size_t bytes)37 void *malloc_simple(size_t bytes)
38 {
39 void *ptr;
40
41 ptr = alloc_simple(bytes, 1);
42 if (!ptr)
43 return ptr;
44
45 log_debug("%lx\n", (ulong)ptr);
46
47 return ptr;
48 }
49
memalign_simple(size_t align,size_t bytes)50 void *memalign_simple(size_t align, size_t bytes)
51 {
52 void *ptr;
53
54 ptr = alloc_simple(bytes, align);
55 if (!ptr)
56 return ptr;
57 log_debug("aligned to %lx\n", (ulong)ptr);
58
59 return ptr;
60 }
61
62 #if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE)
calloc(size_t nmemb,size_t elem_size)63 void *calloc(size_t nmemb, size_t elem_size)
64 {
65 size_t size = nmemb * elem_size;
66 void *ptr;
67
68 ptr = malloc(size);
69 if (!ptr)
70 return ptr;
71 memset(ptr, '\0', size);
72
73 return ptr;
74 }
75 #endif
76
malloc_simple_info(void)77 void malloc_simple_info(void)
78 {
79 log_info("malloc_simple: %lx bytes used, %lx remain\n", gd->malloc_ptr,
80 CONFIG_VAL(SYS_MALLOC_F_LEN) - gd->malloc_ptr);
81 }
82