i386: stand: G/C `I386_INCLUDE_DOS` leftover

Anyway, `I386_INCLUDE_DISK` is enabled for dosboot.

branches: 1.52.2;
i386: stand: Adjust for DOS-routine migration

i386: stand: G/C `I386_INCLUDE_BUS`; only used by netboot

i386: stand: G/C unused `printmemlist`, NFC

bsd.own.mk: rename to CC_WNO_ADDRESS_OF_PACKED_MEMBER

Provide a single variable
CC_WNO_ADDRESS_OF_PACKED_MEMBER
with options for both clang and gcc, to replace
CLANG_NO_ADDR_OF_PACKED_MEMBER
CC_NO_ADDR_OF_PACKED_MEMBER
GCC_NO_ADDR_OF_PACKED_MEMBER

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

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

branches: 1.45.4; 1.45.8;
convert HAVE_GCC handling to modern GCC release numbering:
- HAVE_GCC=5 is now the default (vs. HAVE_GCC=53 we've been using for
GCC 5.4 and GCC 5.5.)
- remove some more GCC 4.8 code. we don't support GCC 4 here.
- adjust set lists to gcc=5 from gcc=53.

add some basic HAVE_GCC=6 handling (totally unused so far.)

branches: 1.44.10;
remove a bunch of "@echo done" from the tail of rules. these messages
were vaguely useful back when we didn't run make -j, but now you end
up with a single line "done" every so often, with no idea what it is
for. very few other targets claim they're done so just remove these.

Order library object build.

Sprinkle more done messages.

remove HAVE_GCC=45 fragment.

branches: 1.40.4;
make this more attractive (to me).

Unbreak clang build by restricting -O0 hack to gcc.

XXX: gcc-4.8 bug. Passes wrong arguments to biosdisk_read(). Turn optimization
off.

branches: 1.37.2;
Only realprot.S still needs to be built with GNU as.

branches: 1.36.2; 1.36.4;
Don't depend on HAVE_GCC being always present.

branches: 1.35.2;
apply some -Wno-error and/or -fno-strict-aliasing.


all of this should be looked at closer, but some of them are not
very trivial.

Catch up with addition of putstr32.S.

Add C stubs to allow prints early in the boot code.

branches: 1.32.2;
Disable integrated assembler for files that use .code16 or .code32 for
now. Disable Clang completely for bootxx and netboot for now until the
size issue has been sorted out.

branches: 1.31.2;
Teach BIOS disk driver about GPT partition tables.
Inspired by Mike Volokhov's GPT booting GSoC project.

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.

branches: 1.29.4;
Add 32 bit versions of message and dump_eax that write directly to
the serial port. Useful for debugging - especially real_to_prot!

Remove extra trailing slash in ${S} path.

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).

branches: 1.26.4;
Make pxeboot understand boot.cfg.

branches: 1.25.2;
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.

branches: 1.24.16; 1.24.20; 1.24.26;
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.

- Make it compile again.
- Don't use (very dodgy) inline assembly.

branches: 1.22.18; 1.22.60; 1.22.68; 1.22.78; 1.22.80; 1.22.82;
Add functions needed by new boot code

add another memory size detection routine, using int15, function 0xc7, which
is supported on later IBM PS/2 models; this is necessary to detect memory
over 64MB
thanks go to Pavel Cahyna for testing on his IBM PS/2 machine with 128MB

bump biosboot version to 2.15

branches: 1.20.2;
MKfoo=no -> NOfoo

Work around <bsd.lib.mk> used for kernel libs in other places. Clean up
include paths.

branches: 1.18.4;
Add biosmca.S if I386_INCLUDE_PS2 variable is "yes" (default, overridable)

branches: 1.17.4;
netbsd_opts.c was removed as part of bootverbose/bootquiet changes
Pointed out by Lennart Augustsson in private e-mail.

remove now redundant comment regarding IBM_L40 define

add commented out CPPFLAGS+= -DIBM_L40 - needed for PS/2 bootblocks

Addredd port-i386/9897, but differently. Since the effect of resetting
the video mode on machines with ancient or no video cards is not clear,
for safety's sake a I created a new biosboot variant, biosboot_resetvideo
that does the call.

Anyway, now I can boot my i-opener without hitting Tab. Thanks Andrew!

add a function which prints out the memory descriptors (for debugging)

branches: 1.12.2; 1.12.8;
use new loadfile

branches: 1.11.4;
add a function to pass the "memory map" ie the outcome of INT15/0xe820,
to the kernel

convert from NOxxx= to MKxxx=no.
include <bsd.own.mk> if testing a MKxxx variable.

Remove exec.c from here. I want to make it obvious that it has to be built
with different flags from dosboot and biosboot. Although right now this
does not make a difference because we are building the libraries twice,
it can make a difference when we share the builds.

Um, last rev was kind of backwards... actually build exec.o so that
the boot block links.

exec.c has all the info now.

Add loadfile.c (stolen from Jason's alpha/stand/common/loadfile.c)
loadfile.h contains macros that are supposed to be MD, but loadfile.c is now MI.
Fixes:
- a.out support
- pass information values via an array not global variables
- don't assume that you can access memory directly.
- remove MD parts
- remove some printfs.
XXX: loadfile.c needs to be moved somewhere where other ports can use it.
XXX2: read() routines on the i386 don't appear to set errno on failure.

add new files

Build the new memory detection stuff.

branches: 1.3.4;
1) Make carriage return start boot immediately.
2) Make "quit" reboot machine. This works by adding a reboot assembler
hook that calls INT 19h

Make this work with obj* dirs.

branches: 1.1.1;
Initial revision

i386/stand: build in parallel mode

branches: 1.20.6;
Explicitly pass COPTS

revert previous MAKEOBJDIRPREFIX massaging

switch CFLAGS from using MAKEOBJDIRPREFIX to MAKEOBJDIR. This whole thing
is disgusting, but fixing it properly. requires restructuring

- Introduce :q modifier for make variables and make it double escape $'s so
that passing variables to recursive makes with :q works as expected.
- Revert :Q to work as before.
- Adjust makefiles that use recursive make to use :q

Discussed on tech-toolchain@
XXX: pullup 8

branches: 1.16.10; 1.16.16;
remove a bunch of "@echo done" from the tail of rules. these messages
were vaguely useful back when we didn't run make -j, but now you end
up with a single line "done" every so often, with no idea what it is
for. very few other targets claim they're done so just remove these.

In kernel lib build, print message when things not only start bug also end.

branches: 1.14.32;
Default to -Wno-sign-compare -Wno-pointer-sign for clang.
Push -Wno-array-bounds down to the cases that depend on it.
Selectively disable warnings for 3rd party software or non-trivial
issues to be reviewed later to get clang -Werror to build most of the
tree.

branches: 1.13.92; 1.13.100; 1.13.106;
merge ktrace-lwp.

Make 'dependall' generate the dependencies

branches: 1.11.2; 1.11.18;
Repeat James Chacon's fix from sys/lib/lib{kern,sa,z}:

Don't make clean and cleandir depend on the lib subdir.
Just check for it's existance before running the submake.
This makes it possible to run a make build (which runs
cleandir before make obj) in a r/o source tree.

Fix white space usage.

branches: 1.9.4; 1.9.6;
Final fix to make this work without object directories again.

Readd at signs before commands which were removed for debugging.

Do last change differently: "(unset MAKEOBJDIRPREFIX || true)" is a NOP,
use "MAKEOBJDIRPREFIX= && unset MAKEOBJDIRPREFIX" instead.

Use "(unset MAKEOBJDIRPREFIX || true)" because unset return an error code
if the variable was not set before.

deal properly with MAKEOBJDIRPREFIX (which has priority over MAKEOBJDIR so
the MAKEOBJDIR to ${MAKE} has no effect) so we unset MAKEOBJDIRPREFIX before
invoking ${MAKE}

branches: 1.4.6;
Revert STRIPPROG -> STRIP

STRIP -> STRIPPROG

branches: 1.2.12;
distclean is a synonym for cleandir

branches: 1.1.1;
Initial revision

fix misspellings of 'available' and nearby typos

Fix bootxx_* and boot on machines where the bios sets high bits of %eax on success.

branches: 1.21.12; 1.21.26;
Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.20.6;
Utilize movz[bw]l to save a few instrutions and bytes of .text.

branches: 1.19.4;
Preserve %ds over bios calls.
Not strickly necessary because real_to_prot doesn't normally rely on in.
However it caused much confusion while debugging, and does no harm.

branches: 1.18.78; 1.18.92;
merge ktrace-lwp.

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_*

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

Do not mix assembly-style comments and C-style comments.

Remove trailing spaces.

branches: 1.13.2;
C code now sets length of disk info structure

Don't trust %bp to point to same place in real and protected modes.
prot_to_real preserves %ebp but changes %ss and %sp.
(ok if real %ss is offset n*64k from protected %ss - which it has been)

Remove unused defines

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)

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>).

branches: 1.8.6; 1.8.8;
Actually return the BIOS error code (if any) generated by the reads

branches: 1.7.8;
Shifting ecx without explicit prefix in real mode won't work.

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

* query BIOS geometry information, possibly using the int 13 extensions.
* pass them on to the kernel
* print a message if the 2nd stage bootloader returns (i.e. fails)
instead of just hanging.

Fix a thinko which still prevented this to run on non-int13-ext machines.
Thanks to entropy@zippy.bernstein.com for pointing this out and testing the fix.

Fix typo which prevented this from working
on disks without int13-extension support.

Add int13 extension support

branches: 1.1.1;
Initial revision

i386: stand: G/C `I386_INCLUDE_BUS`; only used by netboot

merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.4.2;
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)

Change "it's" to "it is" inside assembler comments to
stop "unterminated character constant" messages from `mkdep'.

branches: 1.2.4;
Fix operand size confusion in 16-bit code.

branches: 1.1.1;
Initial revision

merge ktrace-lwp.

- Do not mix C-style comments and assembly-style comments.
- Remove unused #define.

branches: 1.2.2; 1.2.18;
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)

branches: 1.1.1;
Initial revision

In efiboot
- create bootinfo information only once.
- add fake biosgeom entries so that the kernel can distinguish between
hard drives (with geom) and CD-ROM (without).

Fix build with -DNO_GPT

Align the behavior of different boot methods in RAIDframe

We enforce the documented and paritally implemented behavior when
looking for the kernel in RAID 1 sets without a partition name given.
We search for:
- A GPT partition with bootme attribute set
- A FFS or LFS patititon
- The first partition

branches: 1.58.4;
Trailing whitespace

In biosdisk_findpartition() check if part_name isn't NULL before
assigning *part_name.

Thanks to manu@ for the pointer.

Fix a tyop.

Add "root" command to provide a BTINFO_ROOTDEVICE parameter.

branches: 1.54.12; 1.54.14;
Do not use NAME=label syntax when label are empty

When booting sysinst from UEFI, it defaults to a GPT installation
where partition have no labels. Bootstrap used the NAME=label partition
anyway, with the result that both EFI and FFS root partition had
the same name "NAME=" and could not be distinguished. The first matching
partition for the name was used, and bootstrap looked for the kernel
in the EFI partition.

We fix that by not using NAME=label names for partition when label
is empty. In that case we revert to old syntax such as hd0b

In-RAID partitions with no name can be candidate for booting

The code to select boot partition in RAID assumed thet had a name,
which is true when there is a GPT inside the RAID, but not when there
is a disklabel inside the RAID. This caused a regression from behavior
of NetBSD 8.1.

We fix this by allowing nameless partition to be boot candidates.
This fixes misc/54748

While there, let raid device be used in the boot specification, like
raid0a:/netbsd.

Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

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.

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

branches: 1.49.2; 1.49.6;
efiboot: try to read boot.cfg from /EFI/NetBSD on ESP of the booted disk.

efiboot: fix to find boot partition process.

NetBSD related partitions with no bootme flag set are also candidates
for boot partition.

efiboot: system can boot from CD/DVD-ROM media.

branches: 1.46.6; 1.46.12;
Initial commit of native amd64 EFI boot loader.

branches: 1.45.2; 1.45.4;
The bootinfo is refreshed each time the bootloader tries to execute a
kernel, so there's no point in using this global variable. Because of
this variable, only one "boot" command can be issued in the prompt, and
you have to reboot the machine if you mistyped the kernel name.

While the old gpt.S mbr code looks at both primary and alternate GPT
partition tables, mbrgpt.S and DKWEDGE_METHOD_GPT only look in the
primary. Align the bootxx/boot2 biosdisk code with this so as to avoid
situations where the disk becomes unbootable when it has an undestroyed
secondary GPT.

branches: 1.43.4; 1.43.6;
avoid pointer aliasing problems.

branches: 1.42.2; 1.42.4;
Apply patch:
PR/46583: BIOS bootloader problems with partitions that start above 1TB

Should be pulled up to netbsd-6.

Sanity check the values coming back from the int13 extensions of the bios,
so we can catch impossible return values. Allows the bootloader to work
again on the Soekris net4501.

Fixes PR kern/46027.

branches: 1.40.2;
PR/45796: Evgeniy Ivanov minixfs3 support.

branches: 1.39.2; 1.39.6;
Fix btinfo_bootdisk's labelsector and btinfo_bootwedge's startblk for
the non-GPT case.

ok jakllsch@

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

Attempt to correct two regressions.
- avoid Virtualbox's BIOS panicing on 64-bit LBAs
- MBR-without-disklabel was ignored

branches: 1.36.2; 1.36.4;
Teach BIOS disk driver about GPT partition tables.
Inspired by Mike Volokhov's GPT booting GSoC project.

Let the compiler determine the correct type for sizeof().
From Mike Volokhov's GPT booting GSoC.

Fix DISK_DEBUG build.

Use printf format macros for long longs.

Sprinkle daddr_t.
Adjust DISK_DEBUG printf formats to match.

Add wait_sec() which uses BIOS function call INT 1Ah/AH=00h (GET SYSTEMTIME)
and use it for large delays (in seconds) instead of delay() that uses
INT 15h/AH=86h (WAIT) in microsecond because the latter one can't provide
precise delays on emulators.
Fixes PR port-i386/43156 (NetBSD bootloader countdown runs at 1/20 speed
in qemu 0.12).

No particular comments on the PR and port-i386@.

branches: 1.30.2; 1.30.4;
trim some fat, don't scan disklabels on non-HD disks

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
>

branches: 1.28.10; 1.28.24;
Remove #define DISK_DEBUG left in by mistake

Allow the boot code to use the disklabel 'faked up' from the mbr.
Should allow bootxx_fat16 (and bootxx_msdos etc) to boot from drives that
don't contain a netbsd disklabel.

branches: 1.26.48; 1.26.54; 1.26.62;
free -> dealloc
unsigned -> size_t for alloc/dealloc

branches: 1.25.2;
merge ktrace-lwp.

branches: 1.24.2;
Add support for cd9660 file system to the i386 BIOS bootloader.

Cosmetic changes.

ANSI, KNF, remove trailing spaces, and some other non-functional changes

Add support for passing booted wedge information to the kernel.

remove license clauses 3 and 4 from my cpoyright notices

Remove memset prototype. Already present in sys/lib/libsa/stand.h.

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!).

Support booting from a netbsd partition in the MBR extended partition.

branches: 1.16.2;
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)

branches: 1.15.4;
b*()->mem*()

g/c COMPAT_OLDBOOT from bootblocks, sprinkle some const
bump bootblock version to 2.10

branches: 1.13.4;
Add support for booting off RAIDframe RAID1 mirrors. Check the first partition
type in biosdiskopen(), and if it is of type FS_RAID, add 64 to d->b_off.

NOTE: installboot(8) still needs some hacking to DTRT, but at least this way
if you can load "/boot" off another partition (e.g, wd0h), then wd0a can be
of type `RAID' with a raidframe mirror at the start and the kernel
will load OK of wd0a, and with raidctl -A root partitions, it will change
root as well.

branches: 1.12.2; 1.12.14;
put biosdiskclose() inside LIBSA_NO_FS_CLOSE

* query BIOS geometry information, possibly using the int 13 extensions.
* pass them on to the kernel
* print a message if the 2nd stage bootloader returns (i.e. fails)
instead of just hanging.

Use the MI <sys/disklabel_mbr.h>, not our own machine-dependent
definitions.

Allow to use the code in user land test programs.

Add compatibility code (#ifdef COMPAT_386BSD_MBRPART): look for 386BSD
partition ID if the NetBSD ID was not found.

branches: 1.7.2;
Ignore BIOS partition table and disklabel for floppys and RAW_PART,
for consistency with the kernel.

don't forget to save the partition number for the kernel

Do the vararg stuff cleanly.
Collect disk information in a "bootinfo" structure.

branches: 1.4.4;
Reformat comments. (messed up by "indent")

Purely cosmetic whitespace/indentation changes (mmm, indent(1))

Don't abort if we don't find an MBR or NetBSD MBR partition; simply assume
that the NetBSD portion of the disk begins at sector 0.

branches: 1.1.1;
Initial revision

Add "root" command to provide a BTINFO_ROOTDEVICE parameter.

branches: 1.12.12; 1.12.14;
Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

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

branches: 1.10.2; 1.10.6;
efiboot: try to read boot.cfg from /EFI/NetBSD on ESP of the booted disk.

efiboot: system can boot from CD/DVD-ROM media.

branches: 1.8.52; 1.8.58;
Sprinkle daddr_t.
Adjust DISK_DEBUG printf formats to match.

branches: 1.7.2; 1.7.6;
ANSI and KNF from Anon Ymous

branches: 1.6.74; 1.6.78; 1.6.86;
merge ktrace-lwp.

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

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.3.2;
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)

Purely cosmetic whitespace/indentation changes (mmm, indent(1))

branches: 1.1.1;
Initial revision

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.

branches: 1.29.2; 1.29.4;
Make this actually build with DISK_DEBUG.

Use printf format macros for long longs.

Sprinkle daddr_t.
Adjust DISK_DEBUG printf formats to match.

branches: 1.26.14; 1.26.22;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.52; 1.25.54; 1.25.56;
Add casts so this works with DISK_DEBUG defined.

branches: 1.24.20; 1.24.22;
merge ktrace-lwp.

branches: 1.23.2;
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_*

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.

branches: 1.18.2;
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 the extended
storage (for e.g. ACLs), this will be done later.

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

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 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)

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.

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>).

branches: 1.11.4; 1.11.18;
b*()->mem*()

branches: 1.10.10;
correct debug printf() to make it compile with DISK_DEBUG again,
closes PR kern/8718 by Takahiro Kambe

branches: 1.9.2; 1.9.4; 1.9.6;
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 actually
use them. Like Adaptec SCSI BIOSs.

branches: 1.7.2;
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

* query BIOS geometry information, possibly using the int 13 extensions.
* pass them on to the kernel
* print a message if the 2nd stage bootloader returns (i.e. fails)
instead of just hanging.

Add int13 extension support

retry disk accesses (for shaky floppy drives)

Reformat comments. (messed up by "indent")

Purely cosmetic whitespace/indentation changes (mmm, indent(1))

branches: 1.1.1;
Initial revision

efiboot: system can boot from CD/DVD-ROM media.

branches: 1.15.90; 1.15.96;
Convert many of the uses of __attribute__ to equivalent
__packed, __unused and __dead macros from cdefs.h

branches: 1.14.50; 1.14.56; 1.14.60; 1.14.64;
merge ktrace-lwp.

branches: 1.13.2;
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_*

Define BIOSDISK_DEFAULT_SECSIZE in biosdisk_ll.h and replace BIOSDISK_SECSIZE
with it.

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

Cosmetic changes.

- Remove support for gcc < 2.7.x. Nobody is using such an old version
these days.
- s/u_int/uint/
- De-__P()

branches: 1.8.2;
used daddr_t for disk block numbers,
add definitions for v2 and v3 disk info structures

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.

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.

branches: 1.5.2;
Clean up the BIOS disk matching code a bit (better naming, one structure
and sysctl to export to userland). Also, only use total number of sectors
given in the extended parameters if the physical chs geometry is
marked invalid. Hopefully fixes a problem where BIOSs would not correctly
fill in this field.

* query BIOS geometry information, possibly using the int 13 extensions.
* pass them on to the kernel
* print a message if the 2nd stage bootloader returns (i.e. fails)
instead of just hanging.

Add int13 extension support

Purely cosmetic whitespace/indentation changes (mmm, indent(1))

branches: 1.1.1;
Initial revision

Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.6.92; 1.6.110;
merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.4.2;
Remove some unused defines

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)

Add missing datasize prefix.

branches: 1.1.1;
Initial revision

Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.2.14; 1.2.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.104; 1.1.106; 1.1.108;
additional support routines for boot code

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)

use %e?x instead of %?x as 'xorl' arguments
use %al for 'movb' target, and 'andb' for masking the result with $0x02
since 'and' conveniently sets ZF, use 'and+jnz' instead of 'and+cmp+jne'

branches: 1.2.2; 1.2.4;
Change biosmca() to export the model number via biosmca_ps2model
variable, if the machine has a MCA bus according to info returned
by BIOS (i.e. on machines without MCA bus, biosmca_ps2model would be zero).

biosmca() is expected to be called on beginning the initialization,
and biosmca_ps2model is then used for further checks.

Add function which uses bios call to get system configuration; this can
be used for presence of MCA bus, if ever needed to be done in bootblocks.
Not used at the moment, but may be in future.

ANSI and KNF from Anon Ymous

branches: 1.2.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.2; 1.1.4; 1.1.128; 1.1.130; 1.1.132;
Change biosmca() to export the model number via biosmca_ps2model
variable, if the machine has a MCA bus according to info returned
by BIOS (i.e. on machines without MCA bus, biosmca_ps2model would be zero).

biosmca() is expected to be called on beginning the initialization,
and biosmca_ps2model is then used for further checks.

KNF and explain a few things

branches: 1.9.12; 1.9.30; 1.9.34;
Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.8.92; 1.8.110;
merge ktrace-lwp.

Remove unused #define.

branches: 1.6.2; 1.6.18;
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)

Change "it's" to "it is" inside assembler comments to
stop "unterminated character constant" messages from `mkdep'.

New, optional, method to get size of extended memory.
It will be used for getextmem() if EXTENDED_MEMDETECT is defined.
Worked on all tested machines.
Thanks to all testers, especially Martin Husemann!

branches: 1.3.4;
Fix misleading comment.

In 16-bit mode, mov %ax,%bx is interpreted as mov %eax,%ebx; this
breaks zero-extension of the 16-bit memory size return from the BIOS.
on at least one system, the trash left in the upper half of %eax
causes the kernel to crash during VM system initialization when it
thinks it has on the order of 2**31 bytes of memory to play with.

We now *say* mov %eax,%ebx, but *mean* mov %ax,%bx..

branches: 1.1.1;
Initial revision

KNF and explain a few things

branches: 1.6.12; 1.6.30; 1.6.34;
Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.5.2;
%bl is part of %bx, %bx contains the address we requested from the BIOS.
Thus, use %cl instead of %bl for return value storage.

branches: 1.4.4; 1.4.6; 1.4.8;
Preserve %ds over bios calls.
Not strickly necessary because real_to_prot doesn't normally rely on in.
However it caused much confusion while debugging, and does no harm.

branches: 1.3.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.104; 1.2.106; 1.2.108;
Change to use .codw16/32 and ensure buffer address <64k
(approved by christos)

add another memory size detection routine, using int15, function 0xc7, which
is supported on later IBM PS/2 models; this is necessary to detect memory
over 64MB
thanks go to Pavel Cahyna for testing on his IBM PS/2 machine with 128MB

bump biosboot version to 2.15

i386/stand/lib: Nix trailing whitespace and tidy comments a bit.

No functional change intended.

PR port-amd64/49470: NetBSD 7 BETA reboots after bootloader (HP 2133)

Allocate buf[6] instead of buf[5] to work around buggy firmware, which may
write mementry to 24 bytes instead 20 requested with ACPI 3.0 enabled,
causing corrupted stack and wrong marks[] values in common_load_kernel().
This in turn was leading to erroneous caluclations and memory addresses.
This eventually may result in null pointer dereference in the kernel and sudden
reboot for VIA based systems.

Commit should fix boot issues for VIA C7-M based HP 2133 Mini-Note,
mentioned in the original bug report. For AMD based HP Compaq 6005 Pro
discussed in a separate thread, the issue may be different.

Tested on my VIA C7-D based Biostar Viotech 3100+ motherboard.

needs-pullups to 9, 10.

PR install/49470

branches: 1.11.8; 1.11.14;
fix various typos in comments and log messages.

branches: 1.10.20;
KNF and explain a few things

branches: 1.9.38; 1.9.58; 1.9.62;
PR kern/39726 Soekris 5501-60 boot/bootxx 120 second delay

Try enabling A20 using an extended BIOS call before playing around with
the keyboard controller or system config port.

branches: 1.8.74; 1.8.78; 1.8.84;
merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

Change getextmem2 to return 'configured' values from cx/dx if ax/bx zero,
make absolutely high the top 16bits of returned values are zero.
Ralf's list says that some BIOS need %eax = 0x0000e820 in getmementry.
Add a few comments.
Might fix problems with memory size detection on some systems.

branches: 1.5.2;
Use correct segment register in getmementry

A buffer slipped though the net... Ensure offset < 64k.
(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 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)

change the interface for getmementry() to hold the iterator in an
argument and to return success or error explicitely.
Now we can "error" and "end of list" cleanly; this should fix the
problem where the last list element was ignored.

branches: 1.1.2;
New, optional, method to get size of extended memory.
It will be used for getextmem() if EXTENDED_MEMDETECT is defined.
Worked on all tested machines.
Thanks to all testers, especially Martin Husemann!

i386: stand: G/C `I386_INCLUDE_BUS`; only used by netboot

ANSI and KNF from Anon Ymous

branches: 1.4.74; 1.4.78; 1.4.86;
merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.2.58;
Purely cosmetic whitespace and indentation changes (mmm, indent(1))

branches: 1.1.1;
Initial revision

Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.4.92; 1.4.110;
merge ktrace-lwp.

Remove unused #define and trailing spaces.

branches: 1.2.2; 1.2.18;
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)

Provides "reboot" call, which just calles INT 19h to ask the bios to
reboot the machine.
This may be insufficient, but its enough for now.

Follow a minor detail in the spec a bit more closely.

Add VESA VBE/DDC EDID support for determining the monitor's preferred
video mode. "vesa on" will now select the preferred mode @ 8bpp if it can
be determined and is supported by the display adapter, otherwise it will
use 640x480 @ 8bpp.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.10; 1.1.12; 1.1.14;
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).

Add cvs version, delete unused definition

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)

branches: 1.1.2; 1.1.8;
Addredd port-i386/9897, but differently. Since the effect of resetting
the video mode on machines with ancient or no video cards is not clear,
for safety's sake a I created a new biosboot variant, biosboot_resetvideo
that does the call.

Anyway, now I can boot my i-opener without hitting Tab. Thanks Andrew!

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.

branches: 1.4.78; 1.4.92;
merge ktrace-lwp.

Allow the com port base address to be specified by the user (via installboot)
rather than taking the value from the bios.
Should allow the system to use a serial console that is also a 'bios serial
console' and isn't in the bios serial port table.
Probably fixes (with a few other changes) PR port-i386/9236

branches: 1.2.4;
Translate ascii keycode to help those with azerty keyboard type straight.

Pick up X86_BOOT_MAGIC_* from bootblock.h
Move boot_params.S to lib (seems useful to use it in pxeboot).

Don't use a magic value. Define a limit, and enforce it.

branches: 1.5.24; 1.5.42;
more KNF and ANSI from Anon-ymous

ANSI and KNF from Anon Ymous

branches: 1.3.74; 1.3.78; 1.3.86;
merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.1.2; 1.1.54;
Definitions and helper functions to collect information in the boot
loader (still experimental).

Recent changes have increased the number of "things" the bootloader
needs to deal with. Increase the table size so we don't overflow.

branches: 1.11.10;
Don't use a magic value. Define a limit, and enforce it.

branches: 1.10.6;
Bring arch/i386/stand bootinfo structure in line with the kernel's
fixed-layout understanding of it.

branches: 1.9.110; 1.9.120; 1.9.126;
free -> dealloc
unsigned -> size_t for alloc/dealloc

branches: 1.8.2;
merge ktrace-lwp.

branches: 1.7.2;
De-__P()

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.5.44;
Create a list of native disks too, and make it retrievable. It contains
all matching BIOS disks per entry, so that we have complete match info.
Enable the matching code.

add a function to pass the "memory map" ie the outcome of INT15/0xe820,
to the kernel

* query BIOS geometry information, possibly using the int 13 extensions.
* pass them on to the kernel
* print a message if the 2nd stage bootloader returns (i.e. fails)
instead of just hanging.

branches: 1.2.2;
Use <machine/bootinfo.h> for definitions shared with the kernel.

Definitions and helper functions to collect information in the boot
loader (still experimental).

Fix buffer overflow in BIOS disk geometry collect for bootinfo

This spares a boot-time panic on iMac with fusion drive, which
feature both a hard drive and a solid-state drive.

branches: 1.23.6; 1.23.14; 1.23.18;
Initial commit of native amd64 EFI boot loader.

branches: 1.22.10; 1.22.14; 1.22.18;
Complete the dosparts -> mbrparts conversion. Only x86k new uses dosparts
because it also uses struct dos_partition.

branches: 1.21.8; 1.21.18;
Use printf format macros for long longs.

branches: 1.20.4;
EXT13_DEVPATH_SIGNATURE should be EXTINFO_DEVPATH_SIGNATURE

branches: 1.19.78; 1.19.92;
merge ktrace-lwp.

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_*

Define BIOSDISK_DEFAULT_SECSIZE in biosdisk_ll.h and replace BIOSDISK_SECSIZE
with it.

Use get_harddrives().

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

Cosmetic changes.

remove license clauses 3 and 4 from my cpoyright notices

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!).

branches: 1.11.2;
Add code to parse V3.x bios disk information.
This should let NetBSD guarantee to tie together the bios disk numbers
with the physical hardware.
#defined out because I don't have a system with a bios that supports it.

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)

branches: 1.9.4;
b*()->mem*()

branches: 1.8.22;
adapt to set_geometry change: we don't have to correct the geometry
anymore

Only use the total number of sectors information field from the EDD if
the bit is set that declares the geometry valid. The spec itself says
that this field isn't covered by the "geometry valid" bit, but at
least one BIOS implements it that way.

Clean up the BIOS disk matching code a bit (better naming, one structure
and sysctl to export to userland). Also, only use total number of sectors
given in the extended parameters if the physical chs geometry is
marked invalid. Hopefully fixes a problem where BIOSs would not correctly
fill in this field.

Declare nhd to be unsigned char, as we're only copying one byte to it.
From Matthias Drochner.

* query BIOS geometry information, possibly using the int 13 extensions.
* pass them on to the kernel
* print a message if the 2nd stage bootloader returns (i.e. fails)
instead of just hanging.

Minor changes to prototypes.

Use the MI <sys/disklabel_mbr.h>, not our own machine-dependent
definitions.

branches: 1.1.2;
Function to collect geometry and partitioning information about the
BIOS-known disks in a "bootinfo" structure (still experimental).

i386/stand/lib: Nix trailing whitespace and tidy comments a bit.

No functional change intended.

PR port-amd64/49470: NetBSD 7 BETA reboots after bootloader (HP 2133)

Allocate buf[6] instead of buf[5] to work around buggy firmware, which may
write mementry to 24 bytes instead 20 requested with ACPI 3.0 enabled,
causing corrupted stack and wrong marks[] values in common_load_kernel().
This in turn was leading to erroneous caluclations and memory addresses.
This eventually may result in null pointer dereference in the kernel and sudden
reboot for VIA based systems.

Commit should fix boot issues for VIA C7-M based HP 2133 Mini-Note,
mentioned in the original bug report. For AMD based HP Compaq 6005 Pro
discussed in a separate thread, the issue may be different.

Tested on my VIA C7-D based Biostar Viotech 3100+ motherboard.

needs-pullups to 9, 10.

PR install/49470

branches: 1.6.26; 1.6.32;
Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

branches: 1.5.58; 1.5.66; 1.5.70;
ANSI and KNF from Anon Ymous

branches: 1.4.74; 1.4.78; 1.4.86;
merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.2.4; 1.2.24;
b*()->mem*()

branches: 1.1.22;
add a function to pass the "memory map" ie the outcome of INT15/0xe820,
to the kernel

Allow the dev= command when processing /boot.cfg file. This
addresses kern/59207

Do not display the boot menu at all if (1) there is no choice and
(2) the timeout value is set to 0.

Add 'fs' option for boot.cfg.

branches: 1.18.10;
Remove now unused bootdefault() function.

Part of PR 56862.

efiboot: try to read boot.cfg from /EFI/NetBSD on ESP of the booted disk.

branches: 1.16.10; 1.16.16;
gets_s -> kgets.

The exact name isn't that important; but it is important not to use
"gets_s" and thereby allow anyone to falsely get the impression we're
implementing Annex K. We aren't.

ok core.

Use gets_s instead of gets. The x86 bootloader prompt is easy to
overflow.

branches: 1.14.4;
Unify all arch/*/stand's atoi() to MI libsa.
lib/libsa/atoi.c was separated from lib/libsa/bootcfg.c.
PR/49084

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.

Use __dead.

branches: 1.11.2;
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).

branches: 1.10.2; 1.10.8; 1.10.12; 1.10.16;
PR/43563: Wolfgang Solfrank: boot.cfg doesn't support comments
Fix makes it support # comments and treat spaces and tabs the same way.

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

branches: 1.8.4; 1.8.6;
Don't treat timeouts or the return key as an invalid choice; spotted by
Andreas Gustafsson.

If the menuformat is not letter, do not allow letter keys to be aliases
for number keys. snj@ often overshoots the spacebar in a panic and
accidentally hits 'b' instead, which makes the loader boot item '2'.
Can't fix snj@, so fix the boot loader instead.

branches: 1.6.2;
Check the size of the offered boot.cfg file. Bail out if it is larger
than 32k.

A bootconf file is normally only a few hundred bytes long. If it is
much bigger than expected, we can't load it into an 8086 real mode
segment anyway.

Much more to the point, in the pxeboot case, someone may have
configured their dhcpd to return the filename for the kernel, not
realizing that the filename is now for boot.cfg which didn't used to
be the case. If we try to load the kernel here, thinking it is
boot.cfg by accident, the boot loader will die ignominiously and
without much of an error message, so we don't want to do that.

This needs to be pulled up to 5.0 if 5.0 has all this machinery
-- I'm not sure whether it does.

bzero -> memset

branches: 1.4.2; 1.4.4; 1.4.6;
more KNF and ANSI from Anon-ymous

ANSI and KNF from Anon Ymous

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

branches: 1.1.4;
Make pxeboot understand boot.cfg.

Remove now unused bootdefault() function.

Part of PR 56862.

efiboot: try to read boot.cfg from /EFI/NetBSD on ESP of the booted disk.

branches: 1.5.20; 1.5.26;
Unify all arch/*/stand's atoi() to MI libsa.
lib/libsa/atoi.c was separated from lib/libsa/bootcfg.c.
PR/49084

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.

branches: 1.3.2;
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).

branches: 1.2.2; 1.2.4; 1.2.8; 1.2.20; 1.2.26; 1.2.30; 1.2.34;
add a boot.cfg option to clear the screen; default off. From Anon Ymous

branches: 1.1.4;
Make pxeboot understand boot.cfg.

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

branches: 1.5.8; 1.5.12;

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.

branches: 1.4.4;
add support for passing image files to the kernel with the 'splash' keyword:

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

branches: 1.3.4; 1.3.6; 1.3.8; 1.3.20; 1.3.28; 1.3.34; 1.3.36;
Use 2-clause license.

Handle compressed modules.

- 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.

remove unused defines

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)

Pass status byte to caller too.

branches: 1.1.1;
Initial revision

G/C ISSET() macro copies. It has been defined in <sys/types.h> since 2006.

don't shadow local variable

branches: 1.10.14; 1.10.24; 1.10.28;
more KNF and ANSI from Anon-ymous

ANSI and KNF from Anon Ymous

branches: 1.8.76; 1.8.80; 1.8.88;
Make a baud rate of zero cause the baud rate divisor be read and converted
to the current baud rate.
That way we use the same baud rate as the system BIOS (or whatever).
Rather useful for pxeboot.

branches: 1.7.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

#undef takes just a name, no params

branches: 1.5.2;
Modify baud rate handling to make it easier to take it from a variable.
Default to 9600 if the requested baud rate is illegal.

like com.c, raise DTR/RTS in console initialisation

branches: 1.3.8; 1.3.14;
RCSID Police.

dev/isa/comreg.h -> dev/ic/comreg.h

branches: 1.1.2;
Console I/O functions for serial lines, accessing the hardware directly.
Allows higher baudrates than 9.6 and software flow control.
From Martin Husemann.

Make a baud rate of zero cause the baud rate divisor be read and converted
to the current baud rate.
That way we use the same baud rate as the system BIOS (or whatever).
Rather useful for pxeboot.

branches: 1.3.2; 1.3.18;
Add baud_rate arg to cominit_d

RCSID Police.

branches: 1.1.2;
Console I/O functions for serial lines, accessing the hardware directly.
Allows higher baudrates than 9.6 and software flow control.
From Martin Husemann.

Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.6.12; 1.6.30;
- Stop the twiddler going awry.
- Clear screen if on a glass tty (!).

branches: 1.5.74; 1.5.76; 1.5.78; 1.5.80;
merge ktrace-lwp.

Remove unused #define.

branches: 1.3.6;
Make awaitkey() poll once even if the timeout is 0. This also fixes a problem
where a keypress within the last polling interval would not be noticed.
Add a new function, conisshift(), which is used to detect whether a shift key
is pressed. Use this via awaitkey() to allow interrupting the boot by holding
down shift (similar to LILO).

This allows setting the timeout to 0 and still being able to use the boot
program.

branches: 1.2.2; 1.2.10; 1.2.12;
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)

branches: 1.1.1;
Initial revision

G/C wbinvd

branches: 1.3.8; 1.3.16; 1.3.26;
+wbinvd

branches: 1.2.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.10; 1.1.14; 1.1.28; 1.1.30; 1.1.32;
- Make it compile again.
- Don't use (very dodgy) inline assembly.

Remove clause 3 and 4 from TNF licenses

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.10; 1.1.14; 1.1.28; 1.1.30; 1.1.32;
- Make it compile again.
- Don't use (very dodgy) inline assembly.

Initial commit of native amd64 EFI boot loader.

branches: 1.6.122; 1.6.142; 1.6.146; 1.6.150;
merge ktrace-lwp.

#include <lib/libsa/stand.h> rather than <stand.h> or "stand.h"

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.3.2;
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.

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)

branches: 1.1.1;
Initial revision

merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

branches: 1.2.2;
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)

branches: 1.1.1;
Initial revision

i386: stand: Migrate DOS support routines from `lib` to `dosboot`

Preserve %ds over bios calls.
Not strickly necessary because real_to_prot doesn't normally rely on in.
However it caused much confusion while debugging, and does no harm.

branches: 1.5.108; 1.5.122;
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)

Fixup some usage of _C_LABEL().

Change "it's" to "it is" inside assembler comments to
stop "unterminated character constant" messages from `mkdep'.

branches: 1.2.4;
Fix operand size confusion in 16-bit code.

branches: 1.1.1;
Initial revision

i386: stand: Migrate DOS support routines from `lib` to `dosboot`

one default is better than two

better than returning random errors.

PR 50516 bad switch statement.
Adding some comments.

branches: 1.16.6;
remove unused variable

branches: 1.15.2; 1.15.12; 1.15.16;
Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

branches: 1.14.2; 1.14.12;
ANSI and KNF from Anon Ymous

branches: 1.13.62; 1.13.66; 1.13.74;
Fix a bunch of cast lvalues.

branches: 1.12.2; 1.12.4; 1.12.6; 1.12.8; 1.12.10;
free -> dealloc
unsigned -> size_t for alloc/dealloc

branches: 1.11.2;
merge ktrace-lwp.

branches: 1.10.16;
remove license clauses 3 and 4 from my cpoyright notices

Fix signed/unsigned warnings.

Further fallout from making 'path' arg to 'ufs_open' 'constchar *'.
There may be fallout in other builds....

branches: 1.7.2;
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)

branches: 1.6.4;
b*()->mem*()

branches: 1.5.16;
add prototypes, slight formatting changes

branches: 1.4.12;
Convert DOS error numbers into UNIX errno values.

branches: 1.3.4;
Reformat comments. (messed up by "indent")

Purely cosmetic whitespace and indentation changes (mmm, indent(1))

branches: 1.1.1;
Initial revision

i386: stand: Migrate DOS support routines from `lib` to `dosboot`

merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

Further fallout from making 'path' arg to 'ufs_open' 'constchar *'.
There may be fallout in other builds....

branches: 1.1.1;
Initial revision

Shorten slightly

PR/40608 - Gao Ya'nan -- typo in comment

branches: 1.2.8; 1.2.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.104; 1.1.106; 1.1.108;
additional support routines for boot code

dosboot(8): remove XMS-specific code. The boot process has been broken for over
a decade, and its relevance has diminished due to the availability of other boot
options.

PR port-i386/58624

branches: 1.80.2;
In efiboot
- create bootinfo information only once.
- add fake biosgeom entries so that the kernel can distinguish between
hard drives (with geom) and CD-ROM (without).

Add reloc keyworkd to let EFI bootstrap load amd64 kernel at any address

EFI bootstrap assumes it can copy the amd64 kernel to its ELF load
address (that is KERNTEXTOFF - KERNBASE = 0x200000), but it can
clash with previous UEFI memory allocation, as described here:
http://mail-index.netbsd.org/tech-kern/2023/04/07/msg028833.html

This change adds a reloc keyword for controling where the EFI
boostrap will copy the kernel image. Possible values are:
default - the default and prior behavior, copy at 0x200000.
none - do not copy and use the kernel image where it was loaded.
address - specify an explicit address where to copy the kernel.

This comes with an amd64 kernel patch that makes it self-relocatable.
It first discover where it was loaded in memory, and if this is
different than the expected 0x200000, hhe the kernel relocates
itself and start over at the right address.

branches: 1.78.4;
i386/stand: Handle 9.99.100 by taking four, not two, digits.

We haven't used the revision part of __NetBSD_Version__ = MMmmrrpp00
in almos two decades so we're apparently reclaiming it as MMmmpppp00.

Add "root" command to provide a BTINFO_ROOTDEVICE parameter.

branches: 1.76.8; 1.76.10;
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.

loadfile sets errno, return the correct error, not EIO.

Add multiboot 2 support to x86 bootloaders

multiboot 2 is required to boot Xen on an EFI system.
This also require a kernel patch for properly discovering
the ACPI RSDP, which is available after 20190912, in
src/sys/arch/x86/acpi/acpi_machdep.c 1.26-1.28

There are a few missing bit in this multiboot 2 implementation
(which are unused by Xen):
- Header tags Address, Freambuffer, and Relocatable are ignored
- Tags APM and Network are not provided
- Tags ACPI old and ACP new are only provided for ACPI boot
- Tag boot device does not provides the subpart (BSD disklabel partition)

Notes:
- multiboot2 is disabled in dosboot, otherwise the binary
gets too big and build fails.
- in src/sys/arch/i386/stand/efiboot, consinit() is renamed
as efi_consinit() to avoid prototype conflicts in src/sys/sys/systm.h

branches: 1.73.2;
Pre-allocate memory for the kernel space at startup.

Now that the ufs module has been split out from ffs and ext2fs, we need
to update the boot-loader to push all modules required to support the
booted filesystem. We treat the fsmod string as a slash-separated list
of module names (relative to kern.module.path), rather than as a single
module path name.

Note that ffsv1 and ffsv2 are still exempted from the boot-loader's
auto-push, but the list of required filesystems is still noted in the
source.

Also note that arch/sandpoint needs a similar change. I have not made
this change because I am totally unable to test it.

Tested on my kernel with _no_ built-in file-systems and with the ffs
bootloader settings of fsmod enabled.

Remove double-include for reboot.h

Add KASLR support in UEFI.

branches: 1.69.4;
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@.)

branches: 1.68.6;
efiboot: fix calculation of the kernel size when loading modules.

efiboot: Kernel modules are loaded in pre-allocated memory.

no need COUNT_KERNEL hack.

PR/51953: fix unable to boot on some AMD machine.

Delayed the timing to copy the kernel to actual address.
copy routine from common/lib/libc/arch/x86_64/string/bcopy.S

efiboot: Copy bootinfo to safe arena.

Initial commit of native amd64 EFI boot loader.

branches: 1.62.2;
KNF and explain a few things

branches: 1.61.2;
Don't use a magic value. Define a limit, and enforce it.

The bootinfo is refreshed each time the bootloader tries to execute a
kernel, so there's no point in using this global variable. Because of
this variable, only one "boot" command can be issued in the prompt, and
you have to reboot the machine if you mistyped the kernel name.

branches: 1.59.4;
Misc WARNS=4 fixes.

branches: 1.58.2;
fix style and whitespace nits

Make name argument to module_add_common const; use this to allow the libsa
fsmod string to soon become const.

Zero out on-stack 'marks' array before first use.
This is needed so the MARK_DATA index is properly filled in.

Use the size of what's at the bootinfo_userconf pointer, not the size
of the pointer itself.

The x86 kernel entry point stack arguments are always 32-bit, even on amd64.

use <i386/multiboot.h> instead of <machine/multiboot.h> so this can be
compiled for amd64

cast from 32-bit integer to void * though uintptr_t to avoid warnings
when compiling for x86_64.

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

branches: 1.50.2; 1.50.4;
Remove the code that tries to load the "ffs" kernel module during boot.
This is in line with the core decision than even modular kernels should
contain the ffs code.
I've left in the code that tries to load "nfs" and "ext2fs", but it
isn't clear that is necessary.
Removes a warning message that (usually) flashes past to fast to read.
AFAICT all the relevant kernels contain ffs (and nfs for that matter).

branches: 1.49.2; 1.49.4;

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.

branches: 1.48.2;
Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

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

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

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

branches: 1.45.2; 1.45.4;
Reduce licence with copyright Perry E. Metzger and Matthias Drochner
to two clauses.

On Thu, 21 Oct 2010 22:42:00 -0700 jnemeth@XXX
(John Nemeth) wrote:
> The file src/sys/arch/i386/stand/lib/exec.c has a licence
> section that starts off saying copyright by each of you. That is
> then followed by a standard four claus UCB licence. Would it be
> okay to reduce that to the two claus licence that is now standard
> for NetBSD?

I have no particular objections.

--
Perry E. Metzger perry@XXX

jnemeth@XXX said:
> Would it be okay to reduce that to the two claus licence

Yes of course, this is OK.

best regards
Matthias

use LOAD_BACKWARDS instead of LOAD_NOTE for floppy book.

Add wait_sec() which uses BIOS function call INT 1Ah/AH=00h (GET SYSTEMTIME)
and use it for large delays (in seconds) instead of delay() that uses
INT 15h/AH=86h (WAIT) in microsecond because the latter one can't provide
precise delays on emulators.
Fixes PR port-i386/43156 (NetBSD bootloader countdown runs at 1/20 speed
in qemu 0.12).

No particular comments on the PR and port-i386@.

branches: 1.42.2; 1.42.4;
Don't commit the selected VBE mode until the loader is past the point of
no return; need to stick in text mode as long as possible since libsa does
not include a rasops library. While here, add the 'vesa' command to pxeboot
to mirror biosboot behaviour.

kmod improvements
- unless otherwise specified, modules are now loaded from the same device
as the kernel ('load miniroot' now implies 'load tftp:miniroot' if the
boot command is 'boot tftp:netbsd')
- the module name -> path expansion now works when a device prefix: is
specified ('load tftp:miniroot' now works)
- if the module name has been expanded to a path, print that path when
loading the module rather than the symbolic name
- only print an error in module_open if both the expanded path and the
raw path fail to open

Fix 'boot -z' bogons.

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).

branches: 1.38.2;
Revert path of modules back to "/stand".

Change path to kernel modules from "/stand" to "/kernel".
Needs to go in before 5.0. Proposed on <tech-kern>.

ANSI and KNF from Anon Ymous

Make pxeboot understand boot.cfg.

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

branches: 1.33.2;
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.

Move functionality for preparing the kernel (including XMS support) into
a new function common_load_kernel.

Move initialisation of boot_argv after the full loading of the kernel,
directly before loading modules.

Setup module_base in module_init().

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.