2012-09-26 23:59:58 -04:00
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/*
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Copyright (C) 2012, Aaron Lindsay <aaron@aclindsay.com>
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This file is part of Aedrix.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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2012-09-25 22:44:19 -04:00
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#ifndef ATAGS_H
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#define ATAGS_H
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#include <types.h>
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#define ATAG_NONE 0x00000000
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#define ATAG_CORE 0x54410001
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#define ATAG_MEM 0x54410002
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#define ATAG_VIDEOTEXT 0x54410003
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#define ATAG_RAMDISK 0x54410004
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#define ATAG_INITRD2 0x54420005
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#define ATAG_SERIAL 0x54410006
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#define ATAG_REVISION 0x54410007
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#define ATAG_VIDEOLFB 0x54410008
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#define ATAG_CMDLINE 0x54410009
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struct atag_core {
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uint32 flags; /* bit 0 = read-only */
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uint32 pagesize; /* systems page size (usually 4k) */
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uint32 rootdev; /* root device number */
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};
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struct atag_mem {
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uint32 size; /* size of the area */
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uint32 start; /* physical start address */
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};
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struct atag {
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uint32 size; /* Size of tag in words (includes entire struct) */
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uint32 tag;
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union {
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struct atag_core core;
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struct atag_mem mem;
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// struct atag_videotext videotext;
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// struct atag_ramdisk ramdisk;
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// struct atag_initrd2 initrd2;
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// struct atag_serialnr serialnr;
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// struct atag_revision revision;
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// struct atag_videolfb videolfb;
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// struct atag_cmdline cmdline;
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} data;
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};
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#define atags_first_mem_region(atag) _atags_mem_region(atag, 1)
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#define atags_next_mem_region(atag) _atags_mem_region(atag, 0)
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int _atags_mem_region(struct atag **mem_header, int initialize);
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#endif /* ATAGS_H */
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