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: ", __func__, bytes, new_ptr, 23 gd->malloc_limit); 24 if (new_ptr > gd->malloc_limit) { 25 debug("space exhausted\n"); 26 return NULL; 27 } 28 ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes); 29 gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr)); 30 debug("%lx\n", (ulong)ptr); 31 32 return ptr; 33 } 34 35 void *memalign_simple(size_t align, size_t bytes) 36 { 37 ulong addr, new_ptr; 38 void *ptr; 39 40 addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align); 41 new_ptr = addr + bytes - gd->malloc_base; 42 if (new_ptr > gd->malloc_limit) 43 return NULL; 44 ptr = map_sysmem(addr, bytes); 45 gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr)); 46 47 return ptr; 48 } 49 50 #if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE) 51 void *calloc(size_t nmemb, size_t elem_size) 52 { 53 size_t size = nmemb * elem_size; 54 void *ptr; 55 56 ptr = malloc(size); 57 memset(ptr, '\0', size); 58 59 return ptr; 60 } 61 #endif 62