The HWID in vboot GBB is an identifier for machine model. On Chrome OS,
that should be provisioned in manufacturing process (by collecting real
hardware information), and will be checked in system startup.
For bring up developers, they usually prefer to generate a test-only
string for HWID. However that format was not well documented and cause
problems. Further more, most Chromebooks are using HWID v3+ today while
the test-only HWID is usually v2. Non-Chrome OS developers may also
prefer their own format.
To simplify development process, the GBB_CONFIG now defaults to empty
string, and will be replaced by a board-specific test-only v2 HWID
automatically. Developers can still override that in mainboard Kconfig
if they prefer v3 or other arbitrary format.
BUG=b:140067412
TEST=Built 'kukui' successfully. Removed kukui GBB config and built
again, still seeing correct test HWID.
Change-Id: I0cda17a374641589291ec8dfb1d66c553f7cbf35
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35634
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
The description.md and README.md was explicitly made for downloading or
extracting some resources, but we need to add more Chrome OS related
scripts soon; so the description should be revised.
Also changed README.md for better markdown style, for example
- Use #, ## to replace the old '-' headers
- Use code format for file names
- Use code block for example of shell execution
Change-Id: Icc3677fa318b03f4aee1b0f5fb13b2095f2afe64
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35664
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This turned out really handy when I tried to build coreboot
for my Chromebox.
These scripts can be used to extract System Agent reference code
and other blobs (e.g. mrc.bin, refcode, VGA option roms) from a
Chrome OS recovery image.
crosfirmware.sh downloads a Chrome OS recovery image from the recovery
image server, unpacks it, extracts the firmware update shell archive,
extracts the firmware images from the shell archive.
To download all Chrome OS firmware images, run
$ ./crosfirmware.sh
To download, e.g. the Panther firmware image, run
$ ./crosfirmware.sh panther
extract_blobs.sh extracts the blobs from a Chrome OS firmware image.
Right now it will produce the ME firmware blob, IFD, VGA option rom,
and mrc.bin
Change-Id: I5fb7e14b10e03e18cd360bc35f1dc92e8ed34e63
Signed-off-by: Joe Pillow <joseph.a.pillow@gmail.com>
Reviewed-on: https://review.coreboot.org/13752
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Hung-Te Lin