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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1998 Robert Nordier
* 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 _BTX_H_
#define _BTX_H_
#include <sys/types.h>
#define BTX_PGSIZE 0x1000 /* Page size */
#define BTX_PGBASE 0x5000 /* Start of page tables */
#define BTX_MAXCWR 0x3bc /* Max. btx_pgctl adjustment */
/*
* BTX image header.
*/
struct btx_hdr {
uint8_t btx_machid; /* Machine ID */
uint8_t btx_hdrsz; /* Header size */
uint8_t btx_magic[3]; /* Magic */
uint8_t btx_majver; /* Major version */
uint8_t btx_minver; /* Minor version */
uint8_t btx_flags; /* Flags */
uint16_t btx_pgctl; /* Paging control */
uint16_t btx_textsz; /* Text size */
uint32_t btx_entry; /* Client entry address */
};
/* btx_machid */
#define BTX_I386 0xeb /* Intel i386 or compatible */
/* btx_magic */
#define BTX_MAG0 'B'
#define BTX_MAG1 'T'
#define BTX_MAG2 'X'
/* btx_flags */
#define BTX_MAPONE 0x80 /* Start mapping at page 1 */
#define BTX_MAPPED(btx) (((btx).btx_pgctl | (BTX_PGSIZE / 4 - 1)) + 1)
#define BTX_ORIGIN(btx) (BTX_PGBASE + BTX_MAPPED(btx) * 4)
#define BTX_ENTRY(btx) (BTX_ORIGIN(btx) + 2 + (btx).btx_hdrsz)
#endif /* !_BTX_H_ */
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