malloc_simple.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Simple malloc implementation
*
* Copyright (c) 2014 Google, Inc
*/
#define LOG_CATEGORY LOGC_ALLOC
#include <common.h>
#include <malloc.h>
#include <mapmem.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
static void *alloc_simple(size_t bytes, int align)
{
ulong addr, new_ptr;
void *ptr;
addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align);
new_ptr = addr + bytes - gd->malloc_base;
log_debug("size=%zx, ptr=%lx, limit=%lx: ", bytes, new_ptr,
gd->malloc_limit);
if (new_ptr > gd->malloc_limit) {
log_err("alloc space exhausted\n");
return NULL;
}
ptr = map_sysmem(addr, bytes);
gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
return ptr;
}
void *malloc_simple(size_t bytes)
{
void *ptr;
ptr = alloc_simple(bytes, 1);
if (!ptr)
return ptr;
log_debug("%lx\n", (ulong)ptr);
return ptr;
}
void *memalign_simple(size_t align, size_t bytes)
{
void *ptr;
ptr = alloc_simple(bytes, align);
if (!ptr)
return ptr;
log_debug("aligned to %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);
if (!ptr)
return ptr;
memset(ptr, '\0', size);
return ptr;
}
#endif
void malloc_simple_info(void)
{
log_info("malloc_simple: %lx bytes used, %lx remain\n", gd->malloc_ptr,
CONFIG_VAL(SYS_MALLOC_F_LEN) - gd->malloc_ptr);
}