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
 42#include <asm/prom.h>
 43
 44extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[],
 45	__dtb_xlp_fvp_begin[], __dtb_xlp_gvp_begin[], __dtb_start[];
 46static void *xlp_fdt_blob;
 47
 48void __init *xlp_dt_init(void *fdtp)
 49{
 50	if (!fdtp) {
 51		switch (current_cpu_data.processor_id & 0xff00) {
 52#ifdef CONFIG_DT_XLP_GVP
 53		case PRID_IMP_NETLOGIC_XLP9XX:
 54			fdtp = __dtb_xlp_gvp_begin;
 55			break;
 56#endif
 57#ifdef CONFIG_DT_XLP_FVP
 58		case PRID_IMP_NETLOGIC_XLP2XX:
 59			fdtp = __dtb_xlp_fvp_begin;
 60			break;
 61#endif
 62#ifdef CONFIG_DT_XLP_SVP
 63		case PRID_IMP_NETLOGIC_XLP3XX:
 64			fdtp = __dtb_xlp_svp_begin;
 65			break;
 66#endif
 67#ifdef CONFIG_DT_XLP_EVP
 68		case PRID_IMP_NETLOGIC_XLP8XX:
 69			fdtp = __dtb_xlp_evp_begin;
 70			break;
 71#endif
 72		default:
 73			/* Pick a built-in if any, and hope for the best */
 74			fdtp = __dtb_start;
 75			break;
 76		}
 77	}
 78	xlp_fdt_blob = fdtp;
 79	return fdtp;
 80}
 81
 82void __init xlp_early_init_devtree(void)
 83{
 84	__dt_setup_arch(xlp_fdt_blob);
 85	strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
 86}
 87
 88void __init device_tree_init(void)
 89{
 90	unsigned long base, size;
 91	struct boot_param_header *fdtp = xlp_fdt_blob;
 92
 93	if (!fdtp)
 94		return;
 95
 96	base = virt_to_phys(fdtp);
 97	size = be32_to_cpu(fdtp->totalsize);
 98
 99	/* Before we do anything, lets reserve the dt blob */
100	reserve_bootmem(base, size, BOOTMEM_DEFAULT);
101
102	unflatten_device_tree();
103
104	/* free the space reserved for the dt blob */
105	free_bootmem(base, size);
106}
107
108static struct of_device_id __initdata xlp_ids[] = {
109	{ .compatible = "simple-bus", },
110	{},
111};
112
113int __init xlp8xx_ds_publish_devices(void)
114{
115	if (!of_have_populated_dt())
116		return 0;
117	return of_platform_bus_probe(NULL, xlp_ids, NULL);
118}
119
120device_initcall(xlp8xx_ds_publish_devices);