1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 M. Warner Losh <imp@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#ifndef __MACHINE_ATAGS_H__ 29#define __MACHINE_ATAGS_H__ 30 31/* 32 * Linux boot ABI compatable ATAG definitions. All these structures 33 * assume tight packing, but since they are all uint32_t's, I've not 34 * bothered to do the usual alignment dance. 35 */ 36 37#define LBABI_MAX_COMMAND_LINE 1024 38 39struct arm_lbabi_header 40{ 41 uint32_t size; /* Size of this node, including header */ 42 uint32_t tag; /* Node type */ 43}; 44 45#define ATAG_NONE 0x00000000 /* End of atags list */ 46#define ATAG_CORE 0x54410001 /* List must start with ATAG_CORE */ 47#define ATAG_MEM 0x54410002 /* Multiple ATAG_MEM nodes possible */ 48#define ATAG_VIDEOTEXT 0x54410003 /* Video parameters */ 49#define ATAG_RAMDISK 0x54410004 /* Describes the ramdisk parameters */ 50#define ATAG_INITRD 0x54410005 /* Deprecated ramdisk -- used va not pa */ 51#define ATAG_INITRD2 0x54420005 /* compressed ramdisk image */ 52#define ATAG_SERIAL 0x54410006 /* 64-bits of serial number */ 53#define ATAG_REVISION 0x54410007 /* Board revision */ 54#define ATAG_VIDEOLFB 0x54410008 /* vesafb framebuffer */ 55#define ATAG_CMDLINE 0x54410009 /* Command line */ 56 57/* 58 * ATAG_CORE data 59 */ 60struct arm_lbabi_core 61{ 62 uint32_t flags; /* bit 0 == read-only */ 63 uint32_t pagesize; 64 uint32_t rootdev; 65}; 66 67/* 68 * ATAG_MEM data -- Can be more than one to describe different 69 * banks. 70 */ 71struct arm_lbabi_mem32 72{ 73 uint32_t size; 74 uint32_t start; /* start of physical memory */ 75}; 76 77/* 78 * ATAG_INITRD2 - Compressed ramdisk image details 79 */ 80struct arm_lbabi_initrd 81{ 82 uint32_t start; /* pa of start */ 83 uint32_t size; /* How big the ram disk is */ 84}; 85 86/* 87 * ATAG_SERIAL - serial number 88 */ 89struct arm_lbabi_serial_number 90{ 91 uint32_t low; 92 uint32_t high; 93}; 94 95/* 96 * ATAG_REVISION - board revision 97 */ 98struct arm_lbabi_revision 99{ 100 uint32_t rev; 101}; 102 103/* 104 * ATAG_CMDLINE - Command line from uboot 105 */ 106struct arm_lbabi_command_line 107{ 108 char command[1]; /* Minimum command length */ 109}; 110 111struct arm_lbabi_tag 112{ 113 struct arm_lbabi_header tag_hdr; 114 union { 115 struct arm_lbabi_core tag_core; 116 struct arm_lbabi_mem32 tag_mem; 117 struct arm_lbabi_initrd tag_initrd; 118 struct arm_lbabi_serial_number tag_sn; 119 struct arm_lbabi_revision tag_rev; 120 struct arm_lbabi_command_line tag_cmd; 121 } u; 122}; 123 124#define ATAG_TAG(a) (a)->tag_hdr.tag 125#define ATAG_SIZE(a) ((a)->tag_hdr.size * sizeof(uint32_t)) 126#define ATAG_NEXT(a) (struct arm_lbabi_tag *)((char *)(a) + ATAG_SIZE(a)) 127 128#endif /* __MACHINE_ATAGS_H__ */ 129