129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2012 M. Warner Losh <imp@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __MACHINE_ATAGS_H__
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#define __MACHINE_ATAGS_H__
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/*
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* Linux boot ABI compatable ATAG definitions. All these structures
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* assume tight packing, but since they are all uint32_t's, I've not
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* bothered to do the usual alignment dance.
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*/
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#define LBABI_MAX_COMMAND_LINE 1024
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struct arm_lbabi_header
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{
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uint32_t size; /* Size of this node, including header */
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uint32_t tag; /* Node type */
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};
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#define ATAG_NONE 0x00000000 /* End of atags list */
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#define ATAG_CORE 0x54410001 /* List must start with ATAG_CORE */
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#define ATAG_MEM 0x54410002 /* Multiple ATAG_MEM nodes possible */
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#define ATAG_VIDEOTEXT 0x54410003 /* Video parameters */
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#define ATAG_RAMDISK 0x54410004 /* Describes the ramdisk parameters */
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#define ATAG_INITRD 0x54410005 /* Deprecated ramdisk -- used va not pa */
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#define ATAG_INITRD2 0x54420005 /* compressed ramdisk image */
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#define ATAG_SERIAL 0x54410006 /* 64-bits of serial number */
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#define ATAG_REVISION 0x54410007 /* Board revision */
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#define ATAG_VIDEOLFB 0x54410008 /* vesafb framebuffer */
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#define ATAG_CMDLINE 0x54410009 /* Command line */
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/*
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* ATAG_CORE data
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*/
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struct arm_lbabi_core
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{
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uint32_t flags; /* bit 0 == read-only */
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uint32_t pagesize;
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uint32_t rootdev;
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};
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/*
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* ATAG_MEM data -- Can be more than one to describe different
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* banks.
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*/
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struct arm_lbabi_mem32
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{
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uint32_t size;
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uint32_t start; /* start of physical memory */
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};
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/*
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* ATAG_INITRD2 - Compressed ramdisk image details
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*/
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struct arm_lbabi_initrd
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{
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uint32_t start; /* pa of start */
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uint32_t size; /* How big the ram disk is */
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};
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/*
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* ATAG_SERIAL - serial number
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*/
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struct arm_lbabi_serial_number
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{
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uint32_t low;
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uint32_t high;
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};
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/*
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* ATAG_REVISION - board revision
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*/
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struct arm_lbabi_revision
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{
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uint32_t rev;
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};
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/*
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* ATAG_CMDLINE - Command line from uboot
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*/
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struct arm_lbabi_command_line
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{
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char command[1]; /* Minimum command length */
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};
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struct arm_lbabi_tag
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{
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struct arm_lbabi_header tag_hdr;
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union {
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struct arm_lbabi_core tag_core;
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struct arm_lbabi_mem32 tag_mem;
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struct arm_lbabi_initrd tag_initrd;
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struct arm_lbabi_serial_number tag_sn;
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struct arm_lbabi_revision tag_rev;
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struct arm_lbabi_command_line tag_cmd;
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} u;
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};
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#define ATAG_TAG(a) (a)->tag_hdr.tag
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#define ATAG_SIZE(a) ((a)->tag_hdr.size * sizeof(uint32_t))
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#define ATAG_NEXT(a) (struct arm_lbabi_tag *)((char *)(a) + ATAG_SIZE(a))
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#endif /* __MACHINE_ATAGS_H__ */
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