LXR uboot/common/malloc

   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 <log.h>
  12#include <malloc.h>
  13#include <mapmem.h>
  14#include <asm/io.h>
  15
  16DECLARE_GLOBAL_DATA_PTR;
  17
  18static void *alloc_simple(size_t bytes, int align)
  19{
  20        ulong addr, new_ptr;
  21        void *ptr;
  22
  23        addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align);
  24        new_ptr = addr + bytes - gd->malloc_base;
  25        log_debug("size=%zx, ptr=%lx, limit=%lx: ", bytes, new_ptr,
  26                  gd->malloc_limit);
  27        if (new_ptr > gd->malloc_limit) {
  28                log_err("alloc space exhausted\n");
  29                return NULL;
  30        }
  31
  32        ptr = map_sysmem(addr, bytes);
  33        gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
  34
  35        return ptr;
  36}
  37
  38void *malloc_simple(size_t bytes)
  39{
  40        void *ptr;
  41
  42        ptr = alloc_simple(bytes, 1);
  43        if (!ptr)
  44                return ptr;
  45
  46        log_debug("%lx\n", (ulong)ptr);
  47
  48        return ptr;
  49}
  50
  51void *memalign_simple(size_t align, size_t bytes)
  52{
  53        void *ptr;
  54
  55        ptr = alloc_simple(bytes, align);
  56        if (!ptr)
  57                return ptr;
  58        log_debug("aligned to %lx\n", (ulong)ptr);
  59
  60        return ptr;
  61}
  62
  63#if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE)
  64void *calloc(size_t nmemb, size_t elem_size)
  65{
  66        size_t size = nmemb * elem_size;
  67        void *ptr;
  68
  69        ptr = malloc(size);
  70        if (!ptr)
  71                return ptr;
  72        memset(ptr, '\0', size);
  73
  74        return ptr;
  75}
  76#endif
  77
  78void malloc_simple_info(void)
  79{
  80        log_info("malloc_simple: %lx bytes used, %lx remain\n", gd->malloc_ptr,
  81                 CONFIG_VAL(SYS_MALLOC_F_LEN) - gd->malloc_ptr);
  82}
  83