LXR linux/arch/powerpc/boot/fsl-soc.c

   1/*
   2 * Freescale SOC support functions
   3 *
   4 * Author: Scott Wood <scottwood@freescale.com>
   5 *
   6 * Copyright (c) 2007 Freescale Semiconductor, Inc.
   7 *
   8 * This program is free software; you can redistribute it and/or modify it
   9 * under the terms of the GNU General Public License version 2 as published
  10 * by the Free Software Foundation.
  11 */
  12
  13#include "ops.h"
  14#include "types.h"
  15#include "fsl-soc.h"
  16#include "stdio.h"
  17
  18static u32 prop_buf[MAX_PROP_LEN / 4];
  19
  20u32 *fsl_get_immr(void)
  21{
  22        void *soc;
  23        unsigned long ret = 0;
  24
  25        soc = find_node_by_devtype(NULL, "soc");
  26        if (soc) {
  27                int size;
  28                u32 naddr;
  29
  30                size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
  31                if (size == 4)
  32                        naddr = prop_buf[0];
  33                else
  34                        naddr = 2;
  35
  36                if (naddr != 1 && naddr != 2)
  37                        goto err;
  38
  39                size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
  40
  41                if (size < 12)
  42                        goto err;
  43                if (prop_buf[0] != 0)
  44                        goto err;
  45                if (naddr == 2 && prop_buf[1] != 0)
  46                        goto err;
  47
  48                if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
  49                        ret = 0;
  50        }
  51
  52err:
  53        if (!ret)
  54                printf("fsl_get_immr: Failed to find immr base\r\n");
  55
  56        return (u32 *)ret;
  57}
  58