1*150a6952SToomas Soome /* 2*150a6952SToomas Soome * Copyright (c) 1998 Robert Nordier 3*150a6952SToomas Soome * All rights reserved. 4*150a6952SToomas Soome * 5*150a6952SToomas Soome * Redistribution and use in source and binary forms, with or without 6*150a6952SToomas Soome * modification, are permitted provided that the following conditions 7*150a6952SToomas Soome * are met: 8*150a6952SToomas Soome * 1. Redistributions of source code must retain the above copyright 9*150a6952SToomas Soome * notice, this list of conditions and the following disclaimer. 10*150a6952SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 11*150a6952SToomas Soome * notice, this list of conditions and the following disclaimer in the 12*150a6952SToomas Soome * documentation and/or other materials provided with the distribution. 13*150a6952SToomas Soome * 14*150a6952SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND 15*150a6952SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16*150a6952SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17*150a6952SToomas Soome * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 18*150a6952SToomas Soome * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 19*150a6952SToomas Soome * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 20*150a6952SToomas Soome * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 21*150a6952SToomas Soome * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22*150a6952SToomas Soome * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 23*150a6952SToomas Soome * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 24*150a6952SToomas Soome * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25*150a6952SToomas Soome * 26*150a6952SToomas Soome * $FreeBSD$ 27*150a6952SToomas Soome */ 28*150a6952SToomas Soome 29*150a6952SToomas Soome #ifndef _BTX_H_ 30*150a6952SToomas Soome #define _BTX_H_ 31*150a6952SToomas Soome 32*150a6952SToomas Soome #include <sys/types.h> 33*150a6952SToomas Soome 34*150a6952SToomas Soome #define BTX_PGSIZE 0x1000 /* Page size */ 35*150a6952SToomas Soome #define BTX_PGBASE 0x5000 /* Start of page tables */ 36*150a6952SToomas Soome #define BTX_MAXCWR 0x3bc /* Max. btx_pgctl adjustment */ 37*150a6952SToomas Soome 38*150a6952SToomas Soome /* 39*150a6952SToomas Soome * BTX image header. 40*150a6952SToomas Soome */ 41*150a6952SToomas Soome struct btx_hdr { 42*150a6952SToomas Soome uint8_t btx_machid; /* Machine ID */ 43*150a6952SToomas Soome uint8_t btx_hdrsz; /* Header size */ 44*150a6952SToomas Soome uint8_t btx_magic[3]; /* Magic */ 45*150a6952SToomas Soome uint8_t btx_majver; /* Major version */ 46*150a6952SToomas Soome uint8_t btx_minver; /* Minor version */ 47*150a6952SToomas Soome uint8_t btx_flags; /* Flags */ 48*150a6952SToomas Soome uint16_t btx_pgctl; /* Paging control */ 49*150a6952SToomas Soome uint16_t btx_textsz; /* Text size */ 50*150a6952SToomas Soome uint32_t btx_entry; /* Client entry address */ 51*150a6952SToomas Soome }; 52*150a6952SToomas Soome 53*150a6952SToomas Soome /* btx_machid */ 54*150a6952SToomas Soome #define BTX_I386 0xeb /* Intel i386 or compatible */ 55*150a6952SToomas Soome 56*150a6952SToomas Soome /* btx_magic */ 57*150a6952SToomas Soome #define BTX_MAG0 'B' 58*150a6952SToomas Soome #define BTX_MAG1 'T' 59*150a6952SToomas Soome #define BTX_MAG2 'X' 60*150a6952SToomas Soome 61*150a6952SToomas Soome /* btx_flags */ 62*150a6952SToomas Soome #define BTX_MAPONE 0x80 /* Start mapping at page 1 */ 63*150a6952SToomas Soome 64*150a6952SToomas Soome #define BTX_MAPPED(btx) (((btx).btx_pgctl | (BTX_PGSIZE / 4 - 1)) + 1) 65*150a6952SToomas Soome #define BTX_ORIGIN(btx) (BTX_PGBASE + BTX_MAPPED(btx) * 4) 66*150a6952SToomas Soome #define BTX_ENTRY(btx) (BTX_ORIGIN(btx) + 2 + (btx).btx_hdrsz) 67*150a6952SToomas Soome 68*150a6952SToomas Soome #endif /* !_BTX_H_ */ 69