CVS log for src/sys/arch/i386/stand/boot/boot2.c

Up to [cvs.NetBSD.org] / src / sys / arch / i386 / stand / boot

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

Do not use default entry's parameters for for plain "boot" command

Go back to the "menu" instead of you want that.

Patch from RVP in PR 56862, ok uwe@

Remove banner printing code from bootloaders, add it to libsa.

This harmonizes efiboot and the various x86 bootloaders to use shared
code for printing the banner. By friendly coincidence, it also adds
support for specifying 'banner=' in arm efiboot's boot.cfg, as on x86.

Sync with HEAD.

use a single printf call for readability

biosboot: Add ASCII art.

Sync w/ HEAD.

sync with head

Add "root" command to provide a BTINFO_ROOTDEVICE parameter.

Pull up following revision(s) (requested by kim in ticket #1575):

	sys/arch/i386/stand/boot/boot2.c: revision 1.74
	share/man/man8/man8.x86/boot.8: revision 1.21

Let consdev command also set speed
Adapted from PR install/55490 by Sunil Nimmagadda

Document optional speed argument to consdev

Pull up following revision(s) (requested by kim in ticket #1013):

	sys/arch/i386/stand/boot/boot2.c: revision 1.74
	share/man/man8/man8.x86/boot.8: revision 1.21

Let consdev command also set speed
Adapted from PR install/55490 by Sunil Nimmagadda

Document optional speed argument to consdev

Let consdev command also set speed

Adapted from PR install/55490 by Sunil Nimmagadda

Mostly merge changes from HEAD upto 20200411

Merge changes from current as of 20200406

Infrastructure for putting kernel+modules in /netbsd/kernel and
/netbsd/modules respectively instead of /netbsd and
/stand/<arch>/<version>/modules.  This is only supported for x86,
and is turned off by default. To try it, add KERNEL_DIR=yes in your
/mk.conf and install a system from that build.

Pull up following revision(s) (requested by manu in ticket #1373):

	sys/arch/i386/stand/boot/boot2.c: revision 1.72 (patch)
	sys/arch/i386/stand/lib/biosdisk.c: revision 1.50
	sys/arch/i386/stand/lib/biosdisk.c: revision 1.51
	sys/arch/i386/stand/efiboot/devopen.c: revision 1.6
	sys/arch/i386/stand/efiboot/devopen.h: revision 1.4
	sys/arch/i386/stand/efiboot/devopen.c: revision 1.7
	sys/arch/i386/stand/efiboot/efidisk.c: revision 1.8
	share/man/man8/man8.x86/boot.8: revision 1.16
	share/man/man8/man8.x86/boot.8: revision 1.17
	sys/arch/i386/stand/lib/Makefile: revision 1.46
	sys/arch/i386/stand/boot/devopen.h: revision 1.5
	sys/arch/i386/stand/boot/devopen.c: revision 1.9
	sys/arch/i386/stand/efiboot/boot.c: revision 1.14 (patch)
	sys/arch/i386/stand/efiboot/boot.c: revision 1.15
	sys/arch/i386/stand/lib/biosdisk.h: revision 1.11
	sys/arch/i386/stand/boot/boot2.c: revision 1.71

Add GPT and RAIDframe support to bootloaders

Classic BIOS (/boot) and EFI bootloaders can now name devices
using the NAME=gpt_label syntax, or using raid partitions. Here
are examples:

boot NAME=root:/netbsd
boot raid0e:/netbsd

Correct the memset(3)'s third argument in i386 biosdisk.c

The size of allocation is the size of the structure biosdisk, not the size
of a pointer.

Document new GPT and RAIDframe capacity of bootstrap code
While there, also document EFI setup and some bugs

Typo fixes, 'file system'; new sentence, new line; expand IA-32.

Bump date for previous.

Make sure devices names are copied including last byte
Fix from M. Levinson.

Pull up following revision(s) (requested by manu in ticket #200):

	sys/arch/i386/stand/boot/boot2.c: revision 1.72
	sys/arch/i386/stand/lib/biosdisk.c: revision 1.50
	sys/arch/i386/stand/lib/biosdisk.c: revision 1.51
	sys/arch/i386/stand/efiboot/devopen.c: revision 1.6
	sys/arch/i386/stand/efiboot/devopen.h: revision 1.4
	sys/arch/i386/stand/efiboot/devopen.c: revision 1.7
	sys/arch/i386/stand/efiboot/efidisk.c: revision 1.8
	share/man/man8/man8.x86/boot.8: revision 1.16
	share/man/man8/man8.x86/boot.8: revision 1.17
	sys/arch/i386/stand/lib/Makefile: revision 1.46
	sys/arch/i386/stand/boot/devopen.h: revision 1.5
	sys/arch/i386/stand/boot/devopen.c: revision 1.9
	sys/arch/i386/stand/efiboot/boot.c: revision 1.14
	sys/arch/i386/stand/efiboot/boot.c: revision 1.15
	sys/arch/i386/stand/lib/biosdisk.h: revision 1.11
	sys/arch/i386/stand/boot/boot2.c: revision 1.71

Add GPT and RAIDframe support to bootloaders

Classic BIOS (/boot) and EFI bootloaders can now name devices
using the NAME=gpt_label syntax, or using raid partitions. Here
are examples:

boot NAME=root:/netbsd
boot raid0e:/netbsd

Correct the memset(3)'s third argument in i386 biosdisk.c

The size of allocation is the size of the structure biosdisk, not the size
of a pointer.

Document new GPT and RAIDframe capacity of bootstrap code
While there, also document EFI setup and some bugs

Typo fixes, 'file system'; new sentence, new line; expand IA-32.
Bump date for previous.

Make sure devices names are copied including last byte
Fix from M. Levinson.

Make sure devices names are copied including last byte

Fix from M. Levinson.

Add GPT and RAIDframe support to bootloaders

Classic BIOS (/boot) and EFI bootloaders can now name devices
using the NAME=gpt_label syntax, or using raid partitions. Here
are examples:
boot NAME=root:/netbsd
boot raid0e:/netbsd

update from HEAD

Add missing ).

Add pkboot in "help".

Reset has_prekern if pkboot fails. Otherwise here:
	pkboot wrong_kernel_path
	boot netbsd
the prekern still gets invoked in the second command.

Add a new option in libsa, to load dynamic binaries. A separate function
is used, and it does not break in any way the generic static loader. Then,
add a new "pkboot" command in the x86 bootloader, which boots a
GENERIC_KASLR kernel via the prekern. (See thread on tech-kern@.)

Sync with HEAD

PR/50748: David Binderman: check bounds before dereference

Sync with HEAD

Also document the "splash" command in boot(8)

Sync with HEAD

Pull up following revision(s) (requested by christos in ticket #426):
	sys/arch/i386/stand/boot/boot2.c: revision 1.64
Restore previous behavior: "boot -s" == "boot netbsd -s"
Instead of ignoring the flags and doing the default boot. Merge some
extraneous code.

Restore previous behavior: "boot -s" == "boot netbsd -s"
Instead of ignoring the flags and doing the default boot. Merge some
extraneous code.
XXX: Find the PR for this, close it and pullup to -7

Rebase to HEAD as of a few days ago.

Rebase.

patch posted to tech-kern@ 2014/06/25 for review with minor changes
resulting from feedback.

move multiple copies of code for parsing boot.cfg file from sparc, i386
and zaurus into libsa/bootcfg.{h,c}. largely retained i386 parsing logic
in addition to keeping sparc dispatch function while remaining consistent
with boot.cfg(5).

previous sparc64 file format has been obsoleted but only used by boot
CDs distrib/sparc64/bootfs/boot.cfg has been updated to compensate.

exported names have been prefixed with either BOOTCFG_ or bootcfg_ as per
feedback from christos@

tested on amd64 & sparc64 but not zaurus.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

kill sprintf.

allow LS to be commented out

Pull up following revision(s) (requested by he in ticket #1872):
	sys/arch/i386/stand/lib/bootmenu.c: revision 1.11 via patch
	sys/arch/i386/stand/lib/bootmenu.h: revision 1.3 via patch
	sys/arch/i386/stand/boot/boot2.c: revision 1.59 via patch
Two changes for the i386 boot loader related to the boot menu which
can be defined in boot.cfg:
 * Add a "menu" command which re-displays the menu and initiates
   the timed countdown
 * Use any default command defined in boot.cfg as default args
   if the user runs "boot" with no arguments
This is useful in circumstances where you e.g. need to interrupt
the normal boot process to switch to serial console, and where
simply "boot netbsd" is no longer sufficient (e.g. as with install
media which needs the miniroot kernel module loaded).

Add support for using a raw file-system image as memory disk root with
the x86 bootloader.

sync with head

Pull up following revision(s) (requested by he in ticket #925):
	sys/arch/i386/stand/lib/bootmenu.c: revision 1.11
	sys/arch/i386/stand/lib/bootmenu.h: revision 1.3
	sys/arch/i386/stand/boot/boot2.c: revision 1.59
Two changes for the i386 boot loader related to the boot menu which
can be defined in boot.cfg:
 * Add a "menu" command which re-displays the menu and initiates
   the timed countdown
 * Use any default command defined in boot.cfg as default args
   if the user runs "boot" with no arguments
This is useful in circumstances where you e.g. need to interrupt
the normal boot process to switch to serial console, and where
simply "boot netbsd" is no longer sufficient (e.g. as with install
media which needs the miniroot kernel module loaded).

Two changes for the i386 boot loader related to the boot menu which
can be defined in boot.cfg:

 * Add a "menu" command which re-displays the menu and initiates
   the timed countdown
 * Use any default command defined in boot.cfg as default args
   if the user runs "boot" with no arguments

This is useful in circumstances where you e.g. need to interrupt
the normal boot process to switch to serial console, and where
simply "boot netbsd" is no longer sufficient (e.g. as with install
media which needs the miniroot kernel module loaded).

sync with head

Pull up following revision(s) (requested by riastradh in ticket #479):
	sys/arch/i386/stand/boot/boot2.c: revision 1.58
Fix i386 `boot' command to try the usual set of kernel names.
Without this, the `boot' command will try only `netbsd', not
`netbsd.gz', `netbsd.old', &c.
Patch from PR port-i386/44562.

Fix i386 `boot' command to try the usual set of kernel names.

Without this, the `boot' command will try only `netbsd', not
`netbsd.gz', `netbsd.old', &c.

Patch from PR port-i386/44562.

sync with head

merge to -current.

Apply the following patch submitted by Evgeniy Ivanov:
http://mail-index.NetBSD.org/tech-kern/2011/12/15/msg012226.html
http://mail-index.NetBSD.org/tech-kern/2011/12/17/msg012229.html

 - add 'ls' op to struct fs_ops to support ls command on each fs,
   enabled by -DLIBSA_ENABLE_LS_OP and SAMISCMAKEFLAGS+="SA_ENABLE_LS_OP=yes"
   in libsa
 - split sys/lib/libsa/ufs_ls.c into UFS specific part and MI part (ls.c)
   that opens the target fs and calls fs-depedent XXX_ls() functions
 - add a ls op for ext2fs
   (all other fs than ufs and ext2fs don't have actual ls ops yet)
 - replace existing MD ufs_ls() calls with this new MI ls()

The original patch was written for i386 and ext2fs.
zaurus zboot has been tested by nonaka@.
ews4800mips and x68k loaders have been tested by me (with several fixes).
landisk might be okay since it was almost copied from i386.

XXX1: "ls" op in fs_ops looks a bit inconsistent, but we will be able to
      replace it with real fs ops like readdir if it's really worth
XXX2: someone might have to check sys/arch/ia64/stand/efi/libefi/efifs_ls.c

Add support for passing saved entropy (random seed file) to the kernel
from the bootloader.  This can fix the problem of poor quality keys
for other kernel modules which call arc4random() early in kernel startup
(NFS startup, in particular, causes this).

We continue to rely on the etc/rc.d/random_seed script to save entropy
to the seed file at shutdown and erase the seed file at startup.

Boot loader support implemented only for i386 and amd64 ports for now but
it should be easy for other ports to do the same or similar.

Sync with HEAD. Most notably: uvm/pmap work done by rmind@, and MP Xen
work of cherry@.

No regression observed on suspend/restore.

cast a uint8_t * to a char * for a function that takes char *.

Sync with HEAD.

sync with head

Support userconf(4) command in boot(8)/boot.cfg(5) on i386/amd64.

From jmmv@, no objections seen in the proposed thread:

	http://mail-index.netbsd.org/tech-kern/2009/01/22/msg004081.html

sync with head

Cure sync hiccups. Code with compile errors is not really useful, heh.

Sync with HEAD. TODO before merge:
- shortcut for suspend code in sysmon, when powerd(8) is not running.
Borrow ``xs_watch'' thread context?
- bug hunting in xbd + xennet resume. Rings are currently thrashed upon
resume, so current implementation force flush them on suspend. It's not
really needed.

Honor bp_timeout even if someone sets X86_BP_FLAGS_NOBOOTCONF.

sync with head

Sync with HEAD

add support for passing image files to the kernel with the 'splash' keyword:

 vesa on;splash /netbsd.jpg;boot -z

Pass a 64-bit boot partition base LBA into x86 /boot,
while maintaining compatibility with existing bootxx code.

MI libsa provides panic() and exit() functions, no need to provide our own.
As MI libsa exit() calls panic() with a "exit" message, don't use it if we
print our own farewell or have already panic()ed.

Sync with HEAD.

Bring the help command output from boot and pxeboot on par with their
code.

Sync with HEAD.

sync to netbsd-5

sync with head

Pull up following revision(s) (requested by hubertf in ticket #1304):
	sys/arch/i386/stand/boot/boot2.c: revision 1.48
When a password is set for the bootloader ("installboot -o password=..."),
it currently complains about an unknown command and prints a usage if the
password is entered wrong:
         ...
         Choose an option; RETURN for default; SPACE to stop countdown.
         Option 1 will be chosen in 0 seconds.
         Password: *
         Password: *
         Password: *
         unknown command
         commands are:
         boot [xdNx:][filename] [-12acdqsvxz]
              (ex. "hd0a:netbsd.old -s"
         ls [path]
         dev xd[N[x]]:
         consdev {pc|com[0123]|com[0123]kbd|auto}
         modules {enabled|disabled}
         load {path_to_module}
         multiboot [xdNx:][filename] [<args>]
         help|?
         quit
         Choose an option; RETURN for default; SPACE to stop countdown.
         Option 1 will be chosen in 0 seconds.
         ...
This is confusing, plus someone may use it to determine bits of
information about the system. What should happen instead is that the user
is informed that the password is wrong:
         ...
         Choose an option; RETURN for default; SPACE to stop countdown.
         Option 1 will be chosen in 0 seconds.
         Password: ****
         Password: ****
         Password: ****
         Wrong password.
         Choose an option; RETURN for default; SPACE to stop countdown.
         ...
Implement the latter behaviour.

When a password is set for the bootloader ("installboot -o password=..."),
it currently complains about an unknown command and prints a usage if the
password is entered wrong:

        ...
        Choose an option; RETURN for default; SPACE to stop countdown.
        Option 1 will be chosen in 0 seconds.
        Password: *
        Password: *
        Password: *
        unknown command
        commands are:
        boot [xdNx:][filename] [-12acdqsvxz]
             (ex. "hd0a:netbsd.old -s"
        ls [path]
        dev xd[N[x]]:
        consdev {pc|com[0123]|com[0123]kbd|auto}
        modules {enabled|disabled}
        load {path_to_module}
        multiboot [xdNx:][filename] [<args>]
        help|?
        quit

        Choose an option; RETURN for default; SPACE to stop countdown.
        Option 1 will be chosen in 0 seconds.
        ...

This is confusing, plus someone may use it to determine bits of
information about the system. What should happen instead is that the user
is informed that the password is wrong:

        ...
        Choose an option; RETURN for default; SPACE to stop countdown.
        Option 1 will be chosen in 0 seconds.
        Password: ****
        Password: ****
        Password: ****
        Wrong password.

        Choose an option; RETURN for default; SPACE to stop countdown.
        ...

Implement the latter behaviour.

Invert the flag bits to control module loading: rename
LOADMODULES->NOMODULES and READBOOTCONF->NOBOOTCONF.
This way, the default value (0) wired into old bootxx_* and installed
to file systems remains valid and we avoid problems on partial updates.

On i386/amd64, define two flag bits in the boot parameters which control
whether modules are loaded and whether boot.cfg is evaluated, and
set both to "off" per default in the PXE bootloader.
Extend "installboot" to toggle the bits.
This way, pxeboot works with existing dhcp server setups (and as
described in the manpage) out of the box. Also, boot.cfg reading
involves a stat() call which is horribly inefficient with the
TFTP pseudo file system.

Sync with HEAD.

Apply patch, requested by snj in ticket 1080:
	sys/arch/i386/stand/boot/boot2.c: patch

- If the menuformat is not letter, do not allow letter keys to be
aliases for number keys.
- Don't treat timeouts or the return key as an invalid choice.

sync with head

Make the 'dev' command print out a list of known boot devices based on
information from the BIOS in addition to the currently selected default
partition. Handy when you don't know where to boot from. Here's a demo:

  type "?" or "help" for help.
  > dev
  disk hd0 size 3815 MB
    hd0a(4.2BSD) hd0b(swap)
  disk cd0
    cd0a(unknown)
  default hd0a
  >

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

Fix 'boot -z' bogons.

Sync with HEAD.

Bootloader modifications for generic framebuffer console support on i386
and amd64 where VESA VBE 2.0+ is available.

* Add helper library and stubs to invoke VBE bioscalls.
* Bump HEAP_START as we were already dangerously close to our limits.
* bootdataseg now allows access > 16MB so in the future we can scribble
  on the framebuffer.
* Pass BTINFO_FRAMEBUFFER parameters to kernel when configured.
* VBE modes are configured with the new 'vesa' command. Usage, when present:
    * vesa {enabled|disabled}
      Enable / disable linear framebuffer, default mode is 640x480x8. May
      be changed in the future to determine mode based on VBE/DDC where
      available.
    * vesa list
      List modes supported by the firmware that meet the following criteria:
	* linear framebuffer
	* packed pixel or direct colour mode
    * vesa {modenum|modestr}
      Enable specific VBE mode. The mode can be specified either as a
      VBE mode number (eg. 0x101) or as a string (eg. 800x600x16).

Sync with HEAD.

Sync with HEAD.

merge christos-time_t

merge with head.

add a boot.cfg option to clear the screen; default off. From Anon Ymous

Update haad-dm branch to haad-dm-base2.

Make pxeboot understand boot.cfg.

merge with head.

For the x86 boot loader, autoload a kernel module corresponding to the
root file system type.

Sync with head.

Sync with HEAD.

Add "multiboot" command to boot multiboot compliant kernels like Xen.
Patch provided by Robert Swindell with fixes for the command line
parsing and addition of passing module options from me. The kernel now
always gets the full string for modules like for the command line,
everything before the first space/tab is the path name of the module.

Sync with HEAD.

Sync with HEAD.

Remove a hack which disables loading boot.cfg from ustarfs.
Now all bootfloppies have a proper boot.cfg file in ustarfs.

Tested on qemu.
(though qemu doesn't emulate timeout on the boot prompt properly)

The structure of our elf kernel is:

    elf header/program headers/text/data/note/
    section headers/symbol table/string table

We need to read the section headers first to find the offset of the note
and thus we requite backwards seek. The only reason we need to read the
note is to find the version of the kernel, and this seems not to be used
anywhere. We could potentially change the kernel ldscript to add the note
information in the program headers, but dealing with ldscripts is painful
and producing a more complex binary could break some dumb standalone loader.
So the simple solution is to just disable the note loading for floppies
which is what this patch does. If someone wants to fix it in a better way,
be my guest.

Sync with wrstuden-revivesa-base-2.

Fix display of "Option X will be chosen in" banner. The letter version of it
was always displayed even if number format was selected.

Increase number of menu options to 20.
Add support for switching menu format between numbers and letters. Will
prefer numbers, but will automatically switch to letters if > 9 options
and timeout > 0 (i.e. need a single key press to choose).
Menu format can be explicitly set in boot.cfg file.
Add support for reading numeric choices of more than 1 digit.

Don't run off the end of the bootconf.desc[] array when printing out
the boot menu choices.  Fixes problems with funny display when MAXMENU
or more "menu" items are in /boot.cfg.

Sync with head.

Change the x86 boot blocks so they don't include builder login and date.

For now, we include kernel revision as a way of allowing users to
notice that boot blocks have gotten very old, so the first line of the
printout looks like this (depending on the particular block):

  >> NetBSD/x86 BIOS Boot, Revision 3.4 (from NetBSD 5.0)

This may be changed a bit pending feedback. (Some people think that
the kernel revision shouldn't be there at all, for example.)

Part of the project to assure that bit-identical sources produce
bit-identical release binaries.

Sync w/ -current. 34 merge conflicts to follow.

sync with head

Sync with HEAD.

- Stop the twiddler going awry.
- Clear screen if on a glass tty (!).

sync with head.

sync with head.

Add a missing semicolon.
(mmm, compile before commit :)

Change the wording of a message, to make it clear that pressing SPACE
will stop the countdown timer.  The message now reads "Choose an option;
RETURN for default; SPACE to stop countdown."  It no longer says what
the default choice actually is, because the message printed on the
following line will do that.

Increase banner entries from 10 to 12. This allows all 12 lines of the cd
boot.cfg banner to be displayed.

Handle compressed modules.

Add support for multiple commands separated by semi-colons on menu lines
in boot.cfg.
e.g.
menu=Boot with module foo:load=/foo.kmod;boot

- Give x86 BIOS boot the ability to load new style modules and pass them
  into the kernel. Based on a patch by jmcneill@, with many fixes and
  improvements by me.

- Put MEMORY_DISK_DYNAMIC and MODULAR into the GENERIC kernels, so that
  you can load miniroot.kmod from the boot blocks and boot into the
  installer!

Tidy up console output slightly.

Adjust the help string for new options.

Sync with HEAD.

Welcome to the time_t=long long dev_t=uint64_t branch.

sync with head.

sync with HEAD

sync with head.

Only attempt to output up to MAXBANNER banner lines

Sync with HEAD.

sync with head

sync with HEAD

Sync with HEAD

If a menu line in boot.cfg has an empty description, then re-use the
command as the description.  For example,

	menu=:boot netbsd -s

now works like

	menu=boot netbsd -s:boot netbsd -s

Sync with HEAD

Configuration file is boot.cfg, not boot.cnf, so fix comments

Add -z to usage strings.

Mention -x in command_help

Sync with HEAD.

Sync with head.

Sync with HEAD

Check whether we are loading from ustarfs and if so, do not attempt to
read boot.cfg.

Fixes PR install/37521. Heavily based on patch by Izumi Tsutsui.

Sync with HEAD.

sync with head

Sync with HEAD.

Sync with HEAD.

Sync with HEAD. amd64 Xen support needs testing.

Print a newline above the menu, but not below the custom banner.
This means that there is a consistent empty line above the menu both with
and without a custom banner.

Sync with HEAD.

Sync with HEAD

Add support for /boot.cfg configuration file in x86 boot loader.
This allows easy configuration of banner text, console device and timeout
as well as allowing menus of commands to be displayed. If /boot.cfg
is not present, then the existing behaviour does not change.

The sections in the boot loader source are surrounded by #ifdef SMALL
allowing this functionality to be removed if space is at a premium.

sync with HEAD

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree.  Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches.  The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Sync with HEAD

sync with head.

Sync with head.

Sync with head.

Fix "Fix a garbage in previous commit." in 1.10.

Hi, junyoung!

merge ktrace-lwp.

Sync with HEAD. Here we go again...

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

- It is worthless to endlessly try to boot unbootable images. If all predefined
  boot images are failed to boot, fall into the prompt.
- Fix a garbage in previous commit.

More cosmetic changes.

- KNF & cosmetic changes
- Remove #if 0'ed netbsd.el{,.gz} from bootfile list. I have no idea what
  those files are (emacs lisp source??? :-).

Cosmetic changes.

KNF & notably, use u_int rather than unsigned int for now for consistency.
This should be reversed eventually...

Pull up revision 1.5, requested by tron in [pullup-2-0 #1408]:

include sys/types.h to make this compile again.

Sync with HEAD.

include sys/types.h to make this compile again.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Overhaul MBR handling (part 1):

<sys/bootblock.h>:
    *	Added definitions for the Master Boot Record (MBR) used by
	a variety of systems (primarily i386), including the format
	of the BIOS Parameter Block (BPB).
	This information was cribbed from a variety of sources
	including <sys/disklabel_mbr.h> which this is a superset of.

	As part of this, some data structure elements and #defines
	were renamed to be more "namespace friendly" and consistent
	with other bootblocks and MBR documentation.
	Update all uses of the old names to the new names.

<sys/disklabel_mbr.h>:
    *	Deprecated in favor of <sys/bootblock.h> (the latter is more
	"host tool" friendly).

amd64 & i386:
    *	Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
	be consistent with the naming convention of the msdosfs tools.

    *	Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
	and it's confusing to have two functionally equivalent bootblocks,
	especially given that "ufs" has multiple meanings (it could be
	a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).

    *	Rework pbr.S (the first sector of bootxx_*):
	    +	Ensure that BPB (bytes 11..89) and the partition table
		(bytes 446..509) do not contain code.
	    +	Add support for booting from FAT partitions if BOOT_FROM_FAT
		is defined.  (Only set for bootxx_msdos).
	    +	Remove "dummy" partition 3; if people want to installboot(8)
		these to the start of the disk they can use fdisk(8) to
		create a real MBR partition table...
	    +	Compile with TERSE_ERROR so it fits because of the above.
		Whilst this is less user friendly, I feel it's important
		to have a valid partition table and BPB in the MBR/PBR.

    *	Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
	with other platforms.

    *	Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
    	we can boot off FAT partitions.

    *	Crank version of /usr/mdec/boot to 3.1, and fix some of the other
	entries in the version file.

installboot(8) (i386):
    *	Read the existing MBR of the filesystem and retain the BIOS
    	Parameter Block (BPB) in bytes 11..89 and the MBR partition
	table in bytes 446..509.  (Previously installboot(8) would
	trash those two sections of the MBR.)

mbrlabel(8):
    *	Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
	to map the MBR partition type to the NetBSD disklabel type.


Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).

Replace BP_* with I386_BP_FLAGS_*, for consistency with other stuff in
<sys/bootblock.h>
(CONSDEV_ should be converted as well, but that's more intrusive...)

rewrite an undefined assignment

Add files for 2nd stage boot loader