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         if (new_ptr > gd->malloc_limit)
  23                 return NULL;
  24         ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes);
  25         gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
  26         return ptr;
  27 }
  28
  29 void *memalign_simple(size_t align, size_t bytes)
  30 {
  31         ulong addr, new_ptr;
  32         void *ptr;
  33
  34         addr = ALIGN(gd->malloc_base + gd->malloc_ptr, bytes);
  35         new_ptr = addr + bytes;
  36         if (new_ptr > gd->malloc_limit)
  37                 return NULL;
  38         ptr = map_sysmem(addr, bytes);
  39         gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
  40         return ptr;
  41 }
  42
  43 #ifdef CONFIG_SYS_MALLOC_SIMPLE
  44 void *calloc(size_t nmemb, size_t elem_size)
  45 {
  46         size_t size = nmemb * elem_size;
  47         void *ptr;
  48
  49         ptr = malloc(size);
  50         memset(ptr, '\0', size);
  51
  52         return ptr;
  53 }
  54 #endif