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 <leah@libreboot.org>
move the coreboot-specific includes into mkhelper.cfg
for that project.
on some projects, we need variables from mkhelper.cfg
to be global, so I was including serprog and coreboot
mkhelper.cfg files in this script.
instead, set a new variable "mkhelpercfg" pointing to
the config file. if it doesn't exist, create and then
point to a temporary (empty) mkhelper.cfg file.
the rom.sh include has been moved to coreboot mkhelper.cfg
The only remaining project-specific logic, in this trees
script, is now the coreboot crossgcc handling, but this
needs to be there as it's also used to build U-Boot.
The way this now works, certain includes are done twice.
For example, include/rom.sh will be included once globally,
outside of main(), and then again in configure_project().
This means that certain functions will be defined twice.
I'm uncertain if shell has anything equivalent to an ifdef
guard as in C, but we actually want this here anyway, and
it shouldn't cause any problems. It's a bit of a hack, but
otherwise results in much cleaner code.
Signed-off-by: Leah Rowe <leah@libreboot.org>
don't put it in the install modules.
this works around a hanging issue on haswell thinkpads.
when any usb device is inserted, GRUB will sometimes
hang if started from the SeaBIOS payload, *while* the
USB device is plugged in.
plugging in the USB device after GRUB starts worked.
it will have to be investigated more at a later date,
but this simply configuration change works.
the xhci module is already loaded explicitly, in grub.cfg
Signed-off-by: Leah Rowe <leah@libreboot.org>
remove nvme support from the "default" grub tree
now there are three trees:
* default: no xhci or nvme patches
* nvme: contains nvme support
* xhci: contains xhci and nvme support
this is in case a bug like lbmk issue #216 ever occurs
again, as referenced before during lbmk audit 5
there is no indication that the nvme patch causes any
issues, but after previous experience i want to be sure
Signed-off-by: Leah Rowe <leah@libreboot.org>
i removed this before, when making grub multi-tree,
because the design i used in an earlier version of
the patch actually added the grub.elf generation
to grub source itself, but then i decided to hack
around the grub build system from lbmk/cbmk instead
re-add this functionality, so that users can easily
insert their own custom grub.cfg into cbfs without
needing to re-build their image.
Signed-off-by: Leah Rowe <leah@libreboot.org>
certain code checks for build.list, to skip it, for
example in items()
we already use config/data/grub to store grub config data
that applied to all trees
create these directories too:
config/data/coreboot
config/data/u-boot
config/data/seabios
move the respective build.list files in here, and also
to config/data/grub
now multi-tree projects contain, per directory, just the
target.cfg file and the patches directory. this is much
cleaner, because some of the logic can be simplified more
Signed-off-by: Leah Rowe <leah@libreboot.org>
Re-add xHCI only on haswell and broadwell machines, where
they are needed. Otherwise, keep the same GRUB code.
The xHCI patches were removed because they caused issues
on Sandybridge-based Dell Latitude laptops. See:
https://codeberg.org/libreboot/lbmk/issues/216
The issue was not reported elsewhere, including on the
Haswell/Broadwell hardware where they are needed, but the
build system could only build one version of GRUB.
The older machines do not need xHCI patches, because they
either do not have xHCI patches, or work (in GRUB) because
they're in EHCI mode when running the payload.
So, the problem is that we need the xHCI patches for GRUB
on Haswell/Broadwell hardware, but the patches break
Sandybridge hardware, and we only had the one build of GRUB.
To mitigate this problem, the build system now supports
building multiple revisions of GRUB, with different patches,
and each given coreboot target can say which GRUB tree to use
by setting this in target.cfg:
grubtree="xhci"
In the above example, the "xhci" tree would be used. Some
generic GRUB config has been moved to config/data/grub/
and config/grub/ now looks like config/coreboot/ - also,
the grub.cfg file (named "payload" in each tree) is copied
to the GRUB source tree as ".config", then added to GRUB's
memdisk in the same way, as grub.cfg.
Several other design changes had to be made because of this:
* grub.cfg in memdisk no longer automatically jumps to one
in CBFS, but now shows a menuentry for it if available
* Certain commands in script/trees are disabled for GRUB,
such as *config make commands.
* gnulib is now defined in config/submodule/grub/, instead
of config/git/grub - and this mitigates an existing bug
where downloading gnulib first would make grub no longer
possible to download in lbmk.
The coreboot option CONFIG_FINALIZE_USB_ROUTE_XHCI has been
re-enabled on: Dell OptiPlex 9020 MT, Dell OptiPlex 9020 SFF,
Lenovo ThinkPad T440p and Lenovo ThinkPad W541 - now USB should
work again in GRUB.
The GRUB payload has been re-enabled on HP EliteBook 820 G2.
This change will enable per-board GRUB optimisation in the
future. For example, we hardcode what partitions and LVMs
GRUB scans because * is slow on ICH7-based machines, due
to GRUB's design. On other machines, * is reasonably fast,
for automatically enumerating the list of devices for boot.
Use of * (and other wildcards) could enable our GRUB payload
to automatically boot more distros, with minimal fuss. This
can be done at a later date, in subsequent revisions.
Signed-off-by: Leah Rowe <leah@libreboot.org>
Leah Rowe