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