lbmk.git/include, branch 20241205

vendor.sh: Remove T480 VGA ROM download handling

2024-12-02T06:12:59+00:00

Libreboot's binary blob reduction policy is crystal clear:

If a blob can be avoided, it must be avoided.

The ThinkPad T480 was using Intel's VGA ROM for graphics
initialisation very briefly, before Mate fixed libgfxinit.

Since libgfxinit is fixed, the Intel VGA ROM is obsolete,
so we should not be handling this at all.

Similarly, the Nvidia ROM handling has been removed, because
Mate is hard-disabling that in the coreboot code anyway, since
the Nvidia dGPU didn't work when tested anyway.

Even if it did, Libreboot's blob policy makes it clear
that Intel graphics with native init from coreboot is to
be the preferred option.

Signed-off-by: Leah Rowe

NEW MAINBOARD: ThinkPad T480

2024-12-01T23:51:20+00:00

This uses the excellent deguard utility, written by
the excellent Mate Kukri.

A few bugs but it mostly works. Documentation to come
shortly, in lbwww.git.

Signed-off-by: Leah Rowe

vendor.sh: Use the new deguard for 3050micro

2024-12-01T01:44:45+00:00

I'm adding ThinkPad T480 support next, which requires
the new revision of deguard. Mate Kukri changed the way
deguard is used, in a rewrite of the project, so lbmk
has to change too.

Signed-off-by: Leah Rowe

rom.sh: Add U-Boot before SeaBIOS and GRUB (x86)

2024-11-27T02:41:39+00:00

Since U-Boot must be inserted at a specific offset, it's
theoretically possible that other files might overlap, but
cbfstool will work around wherever U-Boot was inserted if
it was inserted first; we don't use specific offsets for
the other files.

This is technically a preventative bug fix, but it fixes
a bug that would probably never occur in practise.

Signed-off-by: Leah Rowe

rom.sh: Remove unnecessary shebang

2024-11-26T23:28:42+00:00

This is not a main script, and should not be treated as such;
it must never be directly executed by the user.

This script was only ever used inside other scripts, so the
shebang didn't seem to do much at all, but it shouldn't be
there anyway.

Remove it.

Signed-off-by: Leah Rowe

rom.sh: unset displaymode on normal initmode

2024-11-21T18:34:08+00:00

Otherwise, you get "normal_normal" in the image name.

Signed-off-by: Leah Rowe

rom.sh: Don't build U-Boot on normal initmode

2024-11-21T18:24:50+00:00

The "normal" mode in lbmk is where no built-in GPU exists,
or no libgfxinit is used, and SeaBIOS is the first payload,
and SeaBIOS executes VGA ROMs (can't know if it'll start
in VESA or text mode).

U-Boot needs a VESA framebuffer or native coreboot
framebuffer to work correctly.

Signed-off-by: Leah Rowe

rom.sh: Don't build txtmode U-Boot images

2024-11-21T18:07:33+00:00

U-Boot needs a VESA framebuffer or native coreboot
framebuffer to work properly.

Signed-off-by: Leah Rowe

rom.sh: Support SeaUBoot for 64-bit x86 U-Boot

2024-11-21T12:29:05+00:00

Same concept as SeaGRUB, but for U-Boot. SeaBIOS starts, but
has a bootorder file loading U-Boot first, from flash.

You can interrupt it with the ESC menu, to boot something else
in SeaBIOS, including GRUB.

With this, we can effectively provide extremely user-friendly
UEFI-first setups in Libreboot.

Take that, edk2!

Signed-off-by: Leah Rowe

Only boot 32-bit u-boot from grub, 64 from seabios

2024-11-20T01:19:27+00:00

For some reason, 32-bit U-Boot only works when executed from
GRUB, but not SeaBIOS; 64-bit U-Boot only works from SeaBIOS!

This will have to be investigated. Standalone U-Boot, where
U-Boot is the primary payload, has not yet been tested in
Libreboot, and will not be provided for some time due to
stability concerns. More testing is needed!

Signed-off-by: Leah Rowe