1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2013 Robert N. M. Watson
5 * Copyright (C) 1994 by Rodney W. Grimes, Milwaukie, Oregon 97222
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer as
13 * the first lines of this file unmodified.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Rodney W. Grimes.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL RODNEY W. GRIMES BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $FreeBSD$
36 */
37
38 #ifndef _MACHINE_BOOTINFO_H_
39 #define _MACHINE_BOOTINFO_H_
40
41 /* Only change the version number if you break compatibility. */
42 #define BOOTINFO_VERSION 2
43
44 #define MIPS_BOOTINFO_MAGIC 0xCDEACDEA
45
46 #if defined(__mips_n32) || defined(__mips_n64)
47 typedef uint64_t bi_ptr_t;
48 #else
49 typedef uint32_t bi_ptr_t;
50 #endif
51
52 /*
53 * A zero bootinfo field often means that there is no info available.
54 * Flags are used to indicate the validity of fields where zero is a
55 * normal value.
56 */
57 struct bootinfo {
58 /* bootinfo meta-data. */
59 uint32_t bi_version;
60 uint32_t bi_size;
61
62 /* bootinfo contents. */
63 uint64_t bi_boot2opts; /* boot2 flags to loader. */
64 bi_ptr_t bi_kernelname; /* Pointer to name. */
65 bi_ptr_t bi_nfs_diskless;/* Pointer to NFS data. */
66 bi_ptr_t bi_dtb; /* Pointer to dtb. */
67 bi_ptr_t bi_memsize; /* Physical memory size in bytes. */
68 bi_ptr_t bi_modulep; /* Preloaded modules. */
69 bi_ptr_t bi_boot_dev_type; /* Boot-device type. */
70 bi_ptr_t bi_boot_dev_unitptr; /* Boot-device unit/pointer. */
71 };
72
73 /*
74 * Possible boot-device types passed from boot2 to loader, loader to kernel.
75 * In most cases, the object pointed to will hold a filesystem; one exception
76 * is BOOTINFO_DEV_TYPE_DRAM, which points to a pre-loaded object (e.g.,
77 * loader, kernel).
78 */
79 #define BOOTINFO_DEV_TYPE_DRAM 0 /* DRAM loader/kernel (ptr). */
80 #define BOOTINFO_DEV_TYPE_CFI 1 /* CFI flash (unit). */
81 #define BOOTINFO_DEV_TYPE_SDCARD 2 /* SD card (unit). */
82
83 #ifdef _KERNEL
84 extern struct bootinfo bootinfo;
85 #endif
86
87 #endif /* !_MACHINE_BOOTINFO_H_ */
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