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fsl-soc.c

/*
 * Freescale SOC support functions
 *
 * Author: Scott Wood <scottwood@freescale.com>
 *
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

#include "ops.h"
#include "types.h"
#include "fsl-soc.h"
#include "stdio.h"

static u32 prop_buf[MAX_PROP_LEN / 4];

u32 *fsl_get_immr(void)
{
      void *soc;
      unsigned long ret = 0;

      soc = find_node_by_devtype(NULL, "soc");
      if (soc) {
            int size;
            u32 naddr;

            size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
            if (size == 4)
                  naddr = prop_buf[0];
            else
                  naddr = 2;

            if (naddr != 1 && naddr != 2)
                  goto err;

            size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);

            if (size < 12)
                  goto err;
            if (prop_buf[0] != 0)
                  goto err;
            if (naddr == 2 && prop_buf[1] != 0)
                  goto err;

            if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
                  ret = 0;
      }

err:
      if (!ret)
            printf("fsl_get_immr: Failed to find immr base\r\n");

      return (u32 *)ret;
}

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