Rework previous commit. Return non-zero instead of turning off
BIOSDISK_INT13EXT. BIOSDISK_INT13EXT also enables LBA access mechanisms
that we really want to be using if at all possible.

biosdisk_getextinfo() can fail. If it does fail in set_geometry(),
clear the flag BIOSDISK_INT13EXT so that a caller such as read_gpt()
will not try to rely on the gibberish in the biosdisk_extinfo.

Make this actually build with DISK_DEBUG.

Use printf format macros for long longs.

Sprinkle daddr_t.
Adjust DISK_DEBUG printf formats to match.

Remove clause 3 and 4 from TNF licenses

Add casts so this works with DISK_DEBUG defined.

merge ktrace-lwp.

Massive renames for consistency:
biosdiskreset -> biosdisk_reset
biosread -> biosdisk_read
get_diskinfo -> biosdisk_getinfo
int13_extension -> biosdisk_int13ext
biosextread -> biosdisk_extread

Massive renames for consistency:
biosdiskreset -> biosdisk_reset
biosread -> biosdisk_read
get_diskinfo -> biosdisk_getinfo
int13_extension -> biosdisk_int13ext
biosextread -> biosdisk_extread
int13_getextinfo -> biosdisk_getextinfo
struct biosdisk_ext13info -> biosdisk_extinfo
BIOSDISK_EXT13 -> BIOSDISK_INT13EXT
BIOSDISK_EXT13INFO_V{2,3} -> BIOSDISK_EXTINFO_V{2,3}
EXT13_* -> EXTINFO_*

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get_diskinfo():
Return status code in bits [31:24] of %eax. 0 for success, otherwise failure.

Add support for cd9660 file system to the i386 BIOS bootloader.

ANSI, KNF, kill trailing spaces, and cosmetic changes.

Include libi386.h for function prototypes.

Add a way to force (at compile time) use of int13 extensions.

Use daddr_t for disk block numbers,
Set size of extended disk info structure in the C code

Add support for UFS2. UFS2 is an enhanced FFS, adding support for
64 bit block pointers, extended attribute storage, and a few
other things.

This commit does not yet include the code to manipulate t

Add support for UFS2. UFS2 is an enhanced FFS, adding support for
64 bit block pointers, extended attribute storage, and a few
other things.

This commit does not yet include the code to manipulate the extended
storage (for e.g. ACLs), this will be done later.

Originally written by Kirk McKusick and Network Associates Laboratories for
FreeBSD.

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Use on-stack buffer to check for 2.88MB floppy, malloc() hasn't been
loaded when this is called.
Clearly the information is actually available from the bios.
(Approved by christos)

Change all .S files to use .code16 and .code32
Support 32bit addresses >64k as valid on bios calls.
Move stack for dosboot and biosboot to >64 so stack doesn't hit data.
Use disk sector number passed

Change all .S files to use .code16 and .code32
Support 32bit addresses >64k as valid on bios calls.
Move stack for dosboot and biosboot to >64 so stack doesn't hit data.
Use disk sector number passed by mbr code to select default partition
(the mbr code doesn't do this yet).
NB only biosboot and dosboot have been tested so far.
(changes approved by christos and fvdl)

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If booting from floppy in 2.88MB drive, actually test if it's possible
to read sector 18, and fallback to 1.44MB drive geometry if that fails.
This allows to boot from 1.44MB floppy disk in 2.88MB dr

If booting from floppy in 2.88MB drive, actually test if it's possible
to read sector 18, and fallback to 1.44MB drive geometry if that fails.
This allows to boot from 1.44MB floppy disk in 2.88MB drive.
Tested with 2.88MB drive in IBM PS/2 model 95 donated
by 'Yokotashi' <lhc at kanal ucw cz> and Pavel Cahyna
<pavel.cahyna at st ms mff cuni cz>
Bump biosboot version.

Fixes PR kern/3418 by Keith Moore.

Change okayed by Frank van den Linden.

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Introduce biosdiskreset(), and call it to reset the disk (with Int
0x13 Function 0) after a read error. This is a requirement mentioned
in most BIOS documentation.

This answers PR 18591.

Incidental

Introduce biosdiskreset(), and call it to reset the disk (with Int
0x13 Function 0) after a read error. This is a requirement mentioned
in most BIOS documentation.

This answers PR 18591.

Incidentally, on the Soekris Engineering net45x1 single-board
computer, this fixes a bug where the bootloader corrupts the kernel
while loading it from certain varieties of CompactFlash card
(especially varieties identified by NetBSD as <TOSHIBA THNCF064MBA>).

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b*()->mem*()

correct debug printf() to make it compile with DISK_DEBUG again,
closes PR kern/8718 by Takahiro Kambe

Restrict "out of CHS range" check to harddisks.

Only use int13 extensions if the sectors can not be read through the
older CHS interface. This works around stupid BIOSs who report that
int13 extensions are present and functional, but fail when you

Only use int13 extensions if the sectors can not be read through the
older CHS interface. This works around stupid BIOSs who report that
int13 extensions are present and functional, but fail when you actually
use them. Like Adaptec SCSI BIOSs.

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fix some disk handling problems introduced in the last commits:
-read retries were botched, use the right sector count
-read-ahead buffer was effectively unused
-concentrate the handling of the weird

fix some disk handling problems introduced in the last commits:
-read retries were botched, use the right sector count
-read-ahead buffer was effectively unused
-concentrate the handling of the weird BIOS geometry report at one place
-fallback for old floppies left cylinder count uninitialized

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