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Copyright (C) 2012, Aaron Lindsay <>
This file is part of Aedrix.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#ifndef ATAGS_H
#define ATAGS_H
#include <types.h>
#define ATAG_NONE 0x00000000
#define ATAG_CORE 0x54410001
#define ATAG_MEM 0x54410002
#define ATAG_VIDEOTEXT 0x54410003
#define ATAG_RAMDISK 0x54410004
#define ATAG_INITRD2 0x54420005
#define ATAG_SERIAL 0x54410006
#define ATAG_REVISION 0x54410007
#define ATAG_VIDEOLFB 0x54410008
#define ATAG_CMDLINE 0x54410009
struct atag_core {
uint32 flags; /* bit 0 = read-only */
uint32 pagesize; /* systems page size (usually 4k) */
uint32 rootdev; /* root device number */
struct atag_mem {
uint32 size; /* size of the area */
uint32 start; /* physical start address */
struct atag {
uint32 size; /* Size of tag in words (includes entire struct) */
uint32 tag;
union {
struct atag_core core;
struct atag_mem mem;
// struct atag_videotext videotext;
// struct atag_ramdisk ramdisk;
// struct atag_initrd2 initrd2;
// struct atag_serialnr serialnr;
// struct atag_revision revision;
// struct atag_videolfb videolfb;
// struct atag_cmdline cmdline;
} data;
#define atags_first_mem_region(atag) _atags_mem_region(atag, 1)
#define atags_next_mem_region(atag) _atags_mem_region(atag, 0)
int _atags_mem_region(struct atag **mem_header, int initialize);
#endif /* ATAGS_H */