/***************************************************************************
 *   Copyright (C) 02/2008 by Olaf Rempel                                  *
 *   razzor@kopf-tisch.de                                                  *
 *                                                                         *
 *   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; version 2 of the License                *
 *                                                                         *
 *   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.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include <stdint.h>
#include "AT91SAM7S256.h"
#include "board.h"
#include "static_alloc.h"

#define ALIGN(x) (((x) +3) & ~3)

/* extern symbols, defined in ldscript */
extern void * __bss_end__;
extern void * __stack_top__;

static uint32_t static_alloc_pos;

void * static_alloc(uint32_t size)
{
	if (static_alloc_pos == 0)
		static_alloc_pos = ALIGN((uint32_t)&__bss_end__);

	uint32_t retval = static_alloc_pos;

	size = ALIGN(size);
	static_alloc_pos += size;

	return (void *)retval;
}

uint32_t static_alloc_used(void)
{
	return static_alloc_pos - (uint32_t)&__bss_end__;
}

// TODO: find a better place
uint32_t next_powerof2(uint32_t value)
{
	uint32_t i;

	value--;
        for (i = 1; i < 32; i = i * 2)
                value |= value >> i;

	return value +1;
}