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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
44 extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[],
45         __dtb_xlp_fvp_begin[], __dtb_xlp_gvp_begin[], __dtb_start[];
46 static void *xlp_fdt_blob;
47
48 void __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
82 void __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
88 void __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
108 static struct of_device_id __initdata xlp_ids[] = {
109         { .compatible = "simple-bus", },
110         {},
111 };
112
113 int __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
120 device_initcall(xlp8xx_ds_publish_devices);
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