target/msm7627_surf/atags.c

/* Copyright (c) 2009-2010, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of The Linux Foundation nor
 *       the names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior written
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <reg.h>
#include <debug.h>
#include <smem.h>

#define SIZE_1M               0x00100000

unsigned round_to_mb(unsigned size)
{
	unsigned size_in_mb = 0;
	size_in_mb = size >> 20;
	size_in_mb = size_in_mb << 20;
	return size_in_mb;
}

unsigned* target_atag_mem(unsigned* ptr)
{
	struct smem_ram_ptable ram_ptable;
	unsigned i = 0;
	unsigned size_in_mb = 0;

	if (smem_ram_ptable_init(&ram_ptable))
	{
		for (i = 0; i < ram_ptable.len; i++)
		{
			/* Round down to align to Mega byte size */
			size_in_mb = round_to_mb(ram_ptable.parts[i].size);

			if ((ram_ptable.parts[i].attr == READWRITE)
				&& (ram_ptable.parts[i].domain == APPS_DOMAIN)
				&& (ram_ptable.parts[i].start != 0x0)
				&& (!(size_in_mb <= SIZE_1M)))
			{
				/* ATAG_MEM */
				*ptr++ = 4;
				*ptr++ = 0x54410002;
				/* RAM parition for Emmc boot are reported correctly by modem
				 * Use the size passed from modem directly after rounding down
				 * to MB as kernel expects a megabyte aligned size.
				 */
				if (target_is_emmc_boot()) {
					*ptr++ = size_in_mb;
				}
				else
					*ptr++ = ram_ptable.parts[i].size;

				*ptr++ = ram_ptable.parts[i].start;
			}
		}
	}
	else
	{
		dprintf(CRITICAL, "ERROR: Unable to read RAM partition\n");
		ASSERT(0);
	}
	return ptr;
}

unsigned target_get_max_flash_size(void)
{
	    return (180 * 1024 * 1024);
}