(Part #2, after the Internet link broke totally yesterday.)
This is the long-threatened ISO 9660 CD-ROM bootstrap code.
This work has been sponsored by Plutotech International, Inc (who paid
the initial work), and interface business GmbH (where i did most of
the work). A big thanks also goes to Bruce Evans, for his continuing
help and answering my stupid questions.
The code is basically functioning, with the following caveats:
. Rock Ridge attributes are not yet supported.
. Only SCSI CD-ROMs are supported, since i fail to see any possibility
to determine the drive type using BIOS functions. (Even for hard disks,
this determination is done by a big hack only.)
. El Torito specifies a lot of crap and useless misfeatures, but crucial
things like the ability to figure out the CD TOC have been ``forgotten''.
Thus, if you wanna boot a multisession CD, you need to know at which CD
block your session starts, and need to speciffy it using the @ clause.
. None of the CD-ROM controllers i've seen so far implements the full
El Torito specification at all. Adaptec is probably the closest, but
they miss on non-emulation booting (which would be the most logical
choice for us). Thus, the current code bloats the 7.5 KB boot code
up to 1.44 MB, in order to fake a `floppy' image.
If you wanna use it, specify this file as the boot image on the
command-line of the mksiosfs command (option -b).
Caveat emptor: some versions of the Adaptec BIOS might even fail to
access the CD-ROM at all, using the BIOS functions. I think i've
notice this for ver 1.26, the code has been tested with ver 1.23.
The boot string is as follows:
[@sess-start] [filename] [-flags]
sess-start Extend # where the last session starts, measured in
CD-ROM blocks.
filename As usual, but the input is case-insensitive by now
(since we don't grok RR anyway).
flags As usual, but -C (use CDROM root f/s) is default, so
specifying -C will decactivate this option (which is
probably not what you want :).
A lot of cleanup work is probably required, and some of the files
could/should be merged back to biosboot, perhaps made conditional on
some #ifdef. The malloc implementation that comes with cdboot might
also be useful for kzipboot. (I needed a malloc() since the root dir
ain't fixed in size on a CD.)
I've been testing all this with a 2.2-STABLE as the base for biosboot.
I don't expect too many surprises, although i know the biosboot stuff
has been changed a lot in -current lately. I'm sure Bruce will
comment on all this here anyway. :-)
1997-07-11 05:52:41 +00:00
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/*
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* Mach Operating System
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* Copyright (c) 1992, 1991 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*
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* from: Mach, Revision 2.2 92/04/04 11:35:03 rpd
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1997-12-04 21:52:47 +00:00
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* $Id: boot.h,v 1.1 1997/07/11 05:52:38 joerg Exp $
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(Part #2, after the Internet link broke totally yesterday.)
This is the long-threatened ISO 9660 CD-ROM bootstrap code.
This work has been sponsored by Plutotech International, Inc (who paid
the initial work), and interface business GmbH (where i did most of
the work). A big thanks also goes to Bruce Evans, for his continuing
help and answering my stupid questions.
The code is basically functioning, with the following caveats:
. Rock Ridge attributes are not yet supported.
. Only SCSI CD-ROMs are supported, since i fail to see any possibility
to determine the drive type using BIOS functions. (Even for hard disks,
this determination is done by a big hack only.)
. El Torito specifies a lot of crap and useless misfeatures, but crucial
things like the ability to figure out the CD TOC have been ``forgotten''.
Thus, if you wanna boot a multisession CD, you need to know at which CD
block your session starts, and need to speciffy it using the @ clause.
. None of the CD-ROM controllers i've seen so far implements the full
El Torito specification at all. Adaptec is probably the closest, but
they miss on non-emulation booting (which would be the most logical
choice for us). Thus, the current code bloats the 7.5 KB boot code
up to 1.44 MB, in order to fake a `floppy' image.
If you wanna use it, specify this file as the boot image on the
command-line of the mksiosfs command (option -b).
Caveat emptor: some versions of the Adaptec BIOS might even fail to
access the CD-ROM at all, using the BIOS functions. I think i've
notice this for ver 1.26, the code has been tested with ver 1.23.
The boot string is as follows:
[@sess-start] [filename] [-flags]
sess-start Extend # where the last session starts, measured in
CD-ROM blocks.
filename As usual, but the input is case-insensitive by now
(since we don't grok RR anyway).
flags As usual, but -C (use CDROM root f/s) is default, so
specifying -C will decactivate this option (which is
probably not what you want :).
A lot of cleanup work is probably required, and some of the files
could/should be merged back to biosboot, perhaps made conditional on
some #ifdef. The malloc implementation that comes with cdboot might
also be useful for kzipboot. (I needed a malloc() since the root dir
ain't fixed in size on a CD.)
I've been testing all this with a 2.2-STABLE as the base for biosboot.
I don't expect too many surprises, although i know the biosboot stuff
has been changed a lot in -current lately. I'm sure Bruce will
comment on all this here anyway. :-)
1997-07-11 05:52:41 +00:00
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*/
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/*
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* Extensions for El Torito CD-ROM booting:
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*
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* Copyright <EFBFBD> 1997 Pluto Technologies International, Inc. Boulder CO
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* Copyright <EFBFBD> 1997 interface business GmbH, Dresden.
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* All rights reserved.
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*
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* This code has been written by J<EFBFBD>rg Wunsch, Dresden.
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* Direct comments to <joerg_wunsch@interface-business.de>.
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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(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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/*
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* Specification packet per El Torito, BIOS int 0x13 fn 0x4b00/0x4b01
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*/
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struct specpacket
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{
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u_char size; /* must be 0x13 */
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u_char mediatype; /*
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* 0 - no emulation
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* 1 - 1.2 MB floppy
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* 2 - 1.44 MB floppy
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* 3 - 2.88 MB floppy
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* 4 - hard disk C:
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*/
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u_char drvno; /* emulated drive number */
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u_char ctrlindx; /* controller index, see El Torito */
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u_int32_t lba; /* LBA of emulated disk drive */
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u_int16_t devspec; /* device specification, see El Torito */
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u_int16_t ubufseg; /* user buffer segment */
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u_int16_t loadseg; /* load segment; 0 => use BIOS default 0x7c0 */
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u_int16_t seccnt; /* number of auto-loaded (virtual) sectors */
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u_char cyls; /* same values as in int 0x13, fn 8 */
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u_char secs;
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u_char heads;
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};
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/*
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* Disk address packet for extended BIOS int 0x13 fn's 0x41...0x48.
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*/
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struct daddrpacket
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{
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u_char size; /* size of daddrpacket, must be 0x10 */
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u_char reserved1;
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u_char nblocks; /*
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* number of 512-byte blocks to transfer,
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* must be <= 127
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*/
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u_char reserved2;
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u_int16_t boffs; /* bseg:boffs denominate the transfer buffer */
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u_int16_t bseg;
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u_int32_t lba; /* actually a 64-bit type, but 64-bit arith */
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u_int32_t lbahigh; /* is expensive, and we don't really need it */
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};
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#ifdef DEBUG
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# define DPRINTF(x) printf x
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#else
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# define DPRINTF(x)
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#endif
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/* asm.S */
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#if ASM_ONLY
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void real_to_prot(void);
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void prot_to_real(void);
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#endif
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void startprog(unsigned int physaddr, int howto, int bootdev,
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/* XXX struct bootinfo * */ unsigned int bootinfo);
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void pbzero(void *dst, size_t count);
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void pcpy(const void *src, void *dst, size_t count);
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/* bios.S */
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int biosread(int dev, int cyl, int head, int sec, int nsec, void *offset);
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int getbootspec(struct specpacket *offset);
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int biosreadlba(struct daddrpacket *daddr);
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void putc(int c);
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int getc(void);
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int ischar(void);
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int get_diskinfo(int drive);
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int memsize(int extended);
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/* boot.c */
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extern int loadflags;
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void boot(int drive);
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/* boot2.S */
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void boot2(void);
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/* cdrom.c */
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extern u_int32_t sessionstart;
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int devopen(u_int32_t session);
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void seek(u_int32_t offs);
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int read(u_char *addr, size_t size);
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int xread(u_char *addr, size_t size);
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int openrd(char *name);
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/* io.c */
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void gateA20(void);
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void printf(const char *format, ...);
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void putchar(int c);
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void delay1ms(void);
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int gets(char *buf);
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1997-12-04 21:52:47 +00:00
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int strcasecmp(const char *s1, const char *s2);
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int strcmp(const char *s1, const char *s2);
|
(Part #2, after the Internet link broke totally yesterday.)
This is the long-threatened ISO 9660 CD-ROM bootstrap code.
This work has been sponsored by Plutotech International, Inc (who paid
the initial work), and interface business GmbH (where i did most of
the work). A big thanks also goes to Bruce Evans, for his continuing
help and answering my stupid questions.
The code is basically functioning, with the following caveats:
. Rock Ridge attributes are not yet supported.
. Only SCSI CD-ROMs are supported, since i fail to see any possibility
to determine the drive type using BIOS functions. (Even for hard disks,
this determination is done by a big hack only.)
. El Torito specifies a lot of crap and useless misfeatures, but crucial
things like the ability to figure out the CD TOC have been ``forgotten''.
Thus, if you wanna boot a multisession CD, you need to know at which CD
block your session starts, and need to speciffy it using the @ clause.
. None of the CD-ROM controllers i've seen so far implements the full
El Torito specification at all. Adaptec is probably the closest, but
they miss on non-emulation booting (which would be the most logical
choice for us). Thus, the current code bloats the 7.5 KB boot code
up to 1.44 MB, in order to fake a `floppy' image.
If you wanna use it, specify this file as the boot image on the
command-line of the mksiosfs command (option -b).
Caveat emptor: some versions of the Adaptec BIOS might even fail to
access the CD-ROM at all, using the BIOS functions. I think i've
notice this for ver 1.26, the code has been tested with ver 1.23.
The boot string is as follows:
[@sess-start] [filename] [-flags]
sess-start Extend # where the last session starts, measured in
CD-ROM blocks.
filename As usual, but the input is case-insensitive by now
(since we don't grok RR anyway).
flags As usual, but -C (use CDROM root f/s) is default, so
specifying -C will decactivate this option (which is
probably not what you want :).
A lot of cleanup work is probably required, and some of the files
could/should be merged back to biosboot, perhaps made conditional on
some #ifdef. The malloc implementation that comes with cdboot might
also be useful for kzipboot. (I needed a malloc() since the root dir
ain't fixed in size on a CD.)
I've been testing all this with a 2.2-STABLE as the base for biosboot.
I don't expect too many surprises, although i know the biosboot stuff
has been changed a lot in -current lately. I'm sure Bruce will
comment on all this here anyway. :-)
1997-07-11 05:52:41 +00:00
|
|
|
|
void bcopy(const void *from, void *to, size_t len);
|
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|
|
|
|
void twiddle(void);
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/* probe_keyboard.c */
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|
|
int probe_keyboard(void);
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/* serial.S */
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void serial_putc(int ch);
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int serial_getc(void);
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int serial_ischar(void);
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void init_serial(void);
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/* table.c */
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extern char *devs[];
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extern unsigned long tw_chars;
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/* malloc.c */
|
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void *malloc(size_t size);
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void free(void *chunk);
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/* linker stuff */
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extern void end;
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