LXR linux/arch/mips/netlogic/xlp/dt.c

   1/*
   2 * Copyright 2003-2013 Broadcom Corporation.
   3 * All Rights Reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the Broadcom
   9 * license below:
  10 *
  11 * Redistribution and use in source and binary forms, with or without
  12 * modification, are permitted provided that the following conditions
  13 * are met:
  14 *
  15 * 1. Redistributions of source code must retain the above copyright
  16 *    notice, this list of conditions and the following disclaimer.
  17 * 2. Redistributions in binary form must reproduce the above copyright
  18 *    notice, this list of conditions and the following disclaimer in
  19 *    the documentation and/or other materials provided with the
  20 *    distribution.
  21 *
  22 * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
  23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25 * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
  26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33 */
  34
  35#include <linux/kernel.h>
  36#include <linux/bootmem.h>
  37
  38#include <linux/of_fdt.h>
  39#include <linux/of_platform.h>
  40#include <linux/of_device.h>
  41
  42extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[], __dtb_start[];
  43
  44void __init *xlp_dt_init(void *fdtp)
  45{
  46        if (!fdtp) {
  47                switch (current_cpu_data.processor_id & 0xff00) {
  48#ifdef CONFIG_DT_XLP_SVP
  49                case PRID_IMP_NETLOGIC_XLP3XX:
  50                        fdtp = __dtb_xlp_svp_begin;
  51                        break;
  52#endif
  53#ifdef CONFIG_DT_XLP_EVP
  54                case PRID_IMP_NETLOGIC_XLP8XX:
  55                        fdtp = __dtb_xlp_evp_begin;
  56                        break;
  57#endif
  58                default:
  59                        /* Pick a built-in if any, and hope for the best */
  60                        fdtp = __dtb_start;
  61                        break;
  62                }
  63        }
  64        initial_boot_params = fdtp;
  65        return fdtp;
  66}
  67
  68void __init device_tree_init(void)
  69{
  70        unsigned long base, size;
  71
  72        if (!initial_boot_params)
  73                return;
  74
  75        base = virt_to_phys((void *)initial_boot_params);
  76        size = be32_to_cpu(initial_boot_params->totalsize);
  77
  78        /* Before we do anything, lets reserve the dt blob */
  79        reserve_bootmem(base, size, BOOTMEM_DEFAULT);
  80
  81        unflatten_device_tree();
  82
  83        /* free the space reserved for the dt blob */
  84        free_bootmem(base, size);
  85}
  86
  87static struct of_device_id __initdata xlp_ids[] = {
  88        { .compatible = "simple-bus", },
  89        {},
  90};
  91
  92int __init xlp8xx_ds_publish_devices(void)
  93{
  94        if (!of_have_populated_dt())
  95                return 0;
  96        return of_platform_bus_probe(NULL, xlp_ids, NULL);
  97}
  98
  99device_initcall(xlp8xx_ds_publish_devices);
 100