target/msm7630_surf/atags.c

/* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
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#include <reg.h>
#include <debug.h>
#include <smem.h>

#define EBI1_SIZE_51M   0x03300000
#define EBI1_SIZE_128M  0x08000000
#define EBI1_ADDR_2M    0x00200000
#define EBI1_ADDR_128M  0x08000000
#define EBI1_ADDR_1G    0x40000000

static int msm7x30_lpddr1 = -1;
static int target_is_msm7x30_lpddr1(void);

int target_is_msm7x30_lpddr1(void)
{
    struct smem_board_info board_info;
    unsigned int board_info_struct_len = sizeof(board_info);
    unsigned smem_status;
    char *build_type;

    if (msm7x30_lpddr1 != -1)
    {
        return msm7x30_lpddr1;
    }

    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");
    }

    msm7x30_lpddr1 = 1;

    build_type  = (char *)(board_info.build_id) + 8;
    if (*build_type == 'A')
    {
        msm7x30_lpddr1 = 0;
    }

    return msm7x30_lpddr1;
}

unsigned* target_atag_mem(unsigned* ptr)
{
    /* ATAG_MEM for 51MB + 128MB setup */
    *ptr++ = 4;
    *ptr++ = 0x54410002;
    *ptr++ = EBI1_SIZE_51M;
    *ptr++ = EBI1_ADDR_2M;

    /* ATAG_MEM */
    *ptr++ = 4;
    *ptr++ = 0x54410002;
    *ptr++ = EBI1_SIZE_128M;
    *ptr++ = (target_is_msm7x30_lpddr1()) ? EBI1_ADDR_128M : EBI1_ADDR_1G;

    return ptr;
}

void *target_get_scratch_address(void)
{
    return (void *)((target_is_msm7x30_lpddr1()) ? EBI1_ADDR_128M : EBI1_ADDR_1G);
}