target/msm8960/atags.c

/* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved.
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 * modification, are permitted provided that the following conditions are met:
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 *       notice, this list of conditions and the following disclaimer.
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 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
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 *       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
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 */

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

#define SIZE_1M     (1024 * 1024)
#define SIZE_2M		(2 * SIZE_1M)
#define SIZE_141M	(141 * SIZE_1M)
#define SIZE_256M	(256 * SIZE_1M)
#define SIZE_512M	(512 * SIZE_1M)

unsigned *target_atag_mem(unsigned *ptr)
{
	struct smem_ram_ptable ram_ptable;
	uint8_t i = 0;

	if (smem_ram_ptable_init(&ram_ptable)) {
		for (i = 0; i < ram_ptable.len; i++) {
			/* Use only 141M from memory bank starting at 0x80000000 */
			if (ram_ptable.parts[i].category == SDRAM &&
			    ram_ptable.parts[i].type == SYS_MEMORY &&
			    ram_ptable.parts[i].start == 0x80000000) {
				ASSERT(ram_ptable.parts[i].size >= SIZE_256M);

				*ptr++ = 4;
				*ptr++ = 0x54410002;
				*ptr++ = SIZE_141M;
				*ptr++ = ram_ptable.parts[i].start + SIZE_2M;

				if (ram_ptable.parts[i].size > SIZE_256M) {
					*ptr++ = 4;
					*ptr++ = 0x54410002;
					*ptr++ =
					    ram_ptable.parts[i].size -
					    SIZE_256M;
					*ptr++ =
					    ram_ptable.parts[i].start +
					    SIZE_256M;
				}
			}

			/* Pass along all other usable memory regions to Linux */
			if (ram_ptable.parts[i].category == SDRAM &&
			    ram_ptable.parts[i].type == SYS_MEMORY &&
			    ram_ptable.parts[i].start != 0x80000000) {
				*ptr++ = 4;
				*ptr++ = 0x54410002;
				*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;
}

void *target_get_scratch_address(void)
{
	return ((void *)SCRATCH_ADDR);
}

unsigned target_get_max_flash_size(void)
{
	return (SIZE_512M);
}