malloc_simple.c
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/*
* Simple malloc implementation
*
* Copyright (c) 2014 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <mapmem.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
void *malloc_simple(size_t bytes)
{
ulong new_ptr;
void *ptr;
new_ptr = gd->malloc_ptr + bytes;
debug("%s: size=%zx, ptr=%lx, limit=%lx: ", __func__, bytes, new_ptr,
gd->malloc_limit);
if (new_ptr > gd->malloc_limit) {
debug("space exhausted\n");
return NULL;
}
ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes);
gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
debug("%lx\n", (ulong)ptr);
return ptr;
}
void *memalign_simple(size_t align, size_t bytes)
{
ulong addr, new_ptr;
void *ptr;
addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align);
new_ptr = addr + bytes - gd->malloc_base;
if (new_ptr > gd->malloc_limit) {
debug("space exhausted\n");
return NULL;
}
ptr = map_sysmem(addr, bytes);
gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
debug("%lx\n", (ulong)ptr);
return ptr;
}
#if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE)
void *calloc(size_t nmemb, size_t elem_size)
{
size_t size = nmemb * elem_size;
void *ptr;
ptr = malloc(size);
memset(ptr, '\0', size);
return ptr;
}
#endif