target/msm7630_surf/atags.c

/* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
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 * 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>

#define EBI1_SIZE_195M  0x0C300000
#define EBI1_SIZE_123M  0x07B00000
#define EBI1_SIZE_72M   0x04800000
#define EBI1_ADDR1    	0x00200000
#define EBI1_ADDR2      0x40000000

unsigned* target_atag_mem(unsigned* ptr)
{
    struct smem_board_info board_info;
    unsigned int board_info_struct_len = sizeof(board_info);
    unsigned smem_status;
    char *build_type;
    int enable_lpddr2 = 0;

    smem_status = smem_read_alloc_entry(SMEM_BOARD_INFO_LOCATION,
					&board_info, board_info_struct_len );
    if(smem_status)
    {
      dprintf(CRITICAL, "ERROR: unable to read shared memory for build id\n");
    }

    build_type  = (char *)(board_info.build_id) + 8;
    if (*build_type == 'A')
    {
        enable_lpddr2 = 1;
    }

    if(enable_lpddr2)
    {
	/* ATAG_MEM for 123MB + 72MB setup */
	*ptr++ = 4;
	*ptr++ = 0x54410002;
	*ptr++ = EBI1_SIZE_123M;
	*ptr++ = EBI1_ADDR1;

	/* ATAG_MEM */
	*ptr++ = 4;
	*ptr++ = 0x54410002;
	*ptr++ = EBI1_SIZE_72M;
	*ptr++ = EBI1_ADDR2;
    }
    else
    {
	/* ATAG_MEM for 195MB setup*/
	*ptr++ = 4;
	*ptr++ = 0x54410002;
	*ptr++ = EBI1_SIZE_195M;
	*ptr++ = EBI1_ADDR1;
    }
    return ptr;
}