1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Simple malloc implementation 4 * 5 * Copyright (c) 2014 Google, Inc 6 */ 7 8 #include <common.h> 9 #include <malloc.h> 10 #include <mapmem.h> 11 #include <asm/io.h> 12 13 DECLARE_GLOBAL_DATA_PTR; 14 15 void *malloc_simple(size_t bytes) 16 { 17 ulong new_ptr; 18 void *ptr; 19 20 new_ptr = gd->malloc_ptr + bytes; 21 debug("%s: size=%zx, ptr=%lx, limit=%lx: ", __func__, bytes, new_ptr, 22 gd->malloc_limit); 23 if (new_ptr > gd->malloc_limit) { 24 debug("space exhausted\n"); 25 return NULL; 26 } 27 ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes); 28 gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr)); 29 debug("%lx\n", (ulong)ptr); 30 31 return ptr; 32 } 33 34 void *memalign_simple(size_t align, size_t bytes) 35 { 36 ulong addr, new_ptr; 37 void *ptr; 38 39 addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align); 40 new_ptr = addr + bytes - gd->malloc_base; 41 if (new_ptr > gd->malloc_limit) { 42 debug("space exhausted\n"); 43 return NULL; 44 } 45 46 ptr = map_sysmem(addr, bytes); 47 gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr)); 48 debug("%lx\n", (ulong)ptr); 49 50 return ptr; 51 } 52 53 #if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE) 54 void *calloc(size_t nmemb, size_t elem_size) 55 { 56 size_t size = nmemb * elem_size; 57 void *ptr; 58 59 ptr = malloc(size); 60 if (ptr) 61 memset(ptr, '\0', size); 62 63 return ptr; 64 } 65 #endif 66