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/*
* Copyright (C) 2009 Juergen Beisert, Pengutronix
*
* This code was inspired by the GRUB2 project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
*/
/**
* @file
* @brief Memory management
*/
#include <init.h>
#include <stdio.h>
#include <memory.h>
#include <asm/syslib.h>
#include <asm-generic/memory_layout.h>
/**
* Handling of free memory
*
* Topics:
* - areas used by BIOS code
* - The 0xa0000... 0xfffff hole
* - memory above 0x100000
*/
static int x86_mem_malloc_init(void)
{
#ifdef CONFIG_MEMORY_LAYOUT_DEFAULT
unsigned long memory_size;
memory_size = bios_get_memsize();
memory_size <<= 10; /* BIOS reports in kiB */
/*
* We do not want to conflict with the kernel. So, we keep the
* area from 0x100000 ... 0xFFFFFF free from usage
*/
if (memory_size >= (15 * 1024 * 1024 + MALLOC_SIZE))
mem_malloc_init((void*)(16 * 1024 * 1024),
(void*)(16 * 1024 * 1024 + MALLOC_SIZE - 1));
else
return -1;
#else
mem_malloc_init((void *)MALLOC_BASE,
(void *)(MALLOC_BASE + MALLOC_SIZE - 1));
#endif
return 0;
}
core_initcall(x86_mem_malloc_init);
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