2 * Copyright (c) 2012 M. Warner Losh.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifndef __MACHINE_ATAGS_H__
30 #define __MACHINE_ATAGS_H__
33 * Linux boot ABI compatable ATAG definitions. All these structures
34 * assume tight packing, but since they are all uint32_t's, I've not
35 * bothered to do the usual alignment dance.
38 #define LBABI_MAX_COMMAND_LINE 1024
40 struct arm_lbabi_header
42 uint32_t size; /* Size of this node, including header */
43 uint32_t tag; /* Node type */
46 #define ATAG_NONE 0x00000000 /* End of atags list */
47 #define ATAG_CORE 0x54410001 /* List must start with ATAG_CORE */
48 #define ATAG_MEM 0x54410002 /* Multiple ATAG_MEM nodes possible */
49 #define ATAG_VIDEOTEXT 0x54410003 /* Video parameters */
50 #define ATAG_RAMDISK 0x54410004 /* Describes the ramdisk parameters */
51 #define ATAG_INITRD 0x54410005 /* Deprecated ramdisk -- used va not pa */
52 #define ATAG_INITRD2 0x54420005 /* compressed ramdisk image */
53 #define ATAG_SERIAL 0x54410006 /* 64-bits of serial number */
54 #define ATAG_REVISION 0x54410007 /* Board revision */
55 #define ATAG_VIDEOLFB 0x54410008 /* vesafb framebuffer */
56 #define ATAG_CMDLINE 0x54410009 /* Command line */
63 uint32_t flags; /* bit 0 == read-only */
69 * ATAG_MEM data -- Can be more than one to describe different
72 struct arm_lbabi_mem32
75 uint32_t start; /* start of physical memory */
79 * ATAG_INITRD2 - Compressed ramdisk image details
81 struct arm_lbabi_initrd
83 uint32_t start; /* pa of start */
84 uint32_t size; /* How big the ram disk is */
88 * ATAG_SERIAL - serial number
90 struct arm_lbabi_serial_number
97 * ATAG_REVISION - board revision
99 struct arm_lbabi_revision
105 * ATAG_CMDLINE - Command line from uboot
107 struct arm_lbabi_command_line
109 char command[1]; /* Minimum command length */
114 struct arm_lbabi_header tag_hdr;
116 struct arm_lbabi_core tag_core;
117 struct arm_lbabi_mem32 tag_mem;
118 struct arm_lbabi_initrd tag_initrd;
119 struct arm_lbabi_serial_number tag_sn;
120 struct arm_lbabi_revision tag_rev;
121 struct arm_lbabi_command_line tag_cmd;
125 #define ATAG_TAG(a) (a)->tag_hdr.tag
126 #define ATAG_SIZE(a) (a)->tag_hdr.size
127 #define ATAG_NEXT(a) (struct arm_lbabi_tag *)((char *)(a) + ATAG_SIZE(a))
129 #endif /* __MACHINE_ATAGS_H__ */