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69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/*
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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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
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _BTX_H_
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#define _BTX_H_
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#include <sys/types.h>
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#define BTX_PGSIZE 0x1000 /* Page size */
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#define BTX_PGBASE 0x5000 /* Start of page tables */
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#define BTX_MAXCWR 0x3bc /* Max. btx_pgctl adjustment */
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/*
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* BTX image header.
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*/
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struct btx_hdr {
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uint8_t btx_machid; /* Machine ID */
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uint8_t btx_hdrsz; /* Header size */
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uint8_t btx_magic[3]; /* Magic */
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uint8_t btx_majver; /* Major version */
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uint8_t btx_minver; /* Minor version */
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uint8_t btx_flags; /* Flags */
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uint16_t btx_pgctl; /* Paging control */
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uint16_t btx_textsz; /* Text size */
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uint32_t btx_entry; /* Client entry address */
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};
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/* btx_machid */
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#define BTX_I386 0xeb /* Intel i386 or compatible */
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/* btx_magic */
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#define BTX_MAG0 'B'
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#define BTX_MAG1 'T'
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#define BTX_MAG2 'X'
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/* btx_flags */
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#define BTX_MAPONE 0x80 /* Start mapping at page 1 */
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#define BTX_MAPPED(btx) (((btx).btx_pgctl | (BTX_PGSIZE / 4 - 1)) + 1)
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#define BTX_ORIGIN(btx) (BTX_PGBASE + BTX_MAPPED(btx) * 4)
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#define BTX_ENTRY(btx) (BTX_ORIGIN(btx) + 2 + (btx).btx_hdrsz)
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#endif /* !_BTX_H_ */
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