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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Freescale SOC support functions
   4 *
   5 * Author: Scott Wood <scottwood@freescale.com>
   6 *
   7 * Copyright (c) 2007 Freescale Semiconductor, Inc.
   8 */
   9
  10#include "ops.h"
  11#include "types.h"
  12#include "fsl-soc.h"
  13#include "stdio.h"
  14
  15static u32 prop_buf[MAX_PROP_LEN / 4];
  16
  17u32 *fsl_get_immr(void)
  18{
  19        void *soc;
  20        unsigned long ret = 0;
  21
  22        soc = find_node_by_devtype(NULL, "soc");
  23        if (soc) {
  24                int size;
  25                u32 naddr;
  26
  27                size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
  28                if (size == 4)
  29                        naddr = prop_buf[0];
  30                else
  31                        naddr = 2;
  32
  33                if (naddr != 1 && naddr != 2)
  34                        goto err;
  35
  36                size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
  37
  38                if (size < 12)
  39                        goto err;
  40                if (prop_buf[0] != 0)
  41                        goto err;
  42                if (naddr == 2 && prop_buf[1] != 0)
  43                        goto err;
  44
  45                if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
  46                        ret = 0;
  47        }
  48
  49err:
  50        if (!ret)
  51                printf("fsl_get_immr: Failed to find immr base\r\n");
  52
  53        return (u32 *)ret;
  54}
  55