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f3da76ea8b
malloc_simple() can return 0 if out of memory. Don't call memset from calloc() in this case but rely on the caller checking the return value. Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Reviewed-by: Marek Vasut <marex@denx.de>
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Simple malloc implementation
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*
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* Copyright (c) 2014 Google, Inc
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*/
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#include <common.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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void *malloc_simple(size_t bytes)
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{
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ulong new_ptr;
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void *ptr;
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new_ptr = gd->malloc_ptr + bytes;
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debug("%s: size=%zx, ptr=%lx, limit=%lx: ", __func__, bytes, new_ptr,
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gd->malloc_limit);
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if (new_ptr > gd->malloc_limit) {
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debug("space exhausted\n");
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return NULL;
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}
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ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes);
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gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
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debug("%lx\n", (ulong)ptr);
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return ptr;
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}
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void *memalign_simple(size_t align, size_t bytes)
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{
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ulong addr, new_ptr;
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void *ptr;
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addr = ALIGN(gd->malloc_base + gd->malloc_ptr, align);
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new_ptr = addr + bytes - gd->malloc_base;
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if (new_ptr > gd->malloc_limit) {
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debug("space exhausted\n");
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return NULL;
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}
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ptr = map_sysmem(addr, bytes);
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gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
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debug("%lx\n", (ulong)ptr);
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return ptr;
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}
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#if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE)
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void *calloc(size_t nmemb, size_t elem_size)
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{
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size_t size = nmemb * elem_size;
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void *ptr;
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ptr = malloc(size);
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if (ptr)
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memset(ptr, '\0', size);
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return ptr;
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}
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#endif
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