Hi Simon,
Le 23/08/2022 à 15:38, Simon Glass a écrit :
Hi Antoine,
On Mon, 22 Aug 2022 at 16:00, Antoine Mazeas antoine@karthanis.net wrote:
Thanks Simon,
Can I ask you to clarify what you meant by "drop the private firmware"?
Replace the private binary with a full U-Boot implementation. I hope that the vendor might do it one day.
I'm not aware whether this has been done, this would make things easier and more obvious for sure.
For the record, this patch was tested using the vendored firmware from Raspberry Pi, v1.20220331, and subsequently v1.20220811 when it came out.
I'm happy to do the requested change now if you think it is preferable.
No need, it's fine. We'll keep an eye out for it if someone else uses your function.
Thank you, sounds good!
Regards Antoine
Regards, Simon
Regards
Le 22/08/2022 à 18:39, Simon Glass a écrit :
Hi Antoine,
On Fri, 19 Aug 2022 at 08:08, Antoine Mazeas antoine@karthanis.net wrote:
The RPI firmware adjusts several property values in the dtb it passes to u-boot depending on the board/SoC revision. Inherit some of these when u-boot loads a dtb itself. Specificaly copy:
- /model: The firmware provides a more specific string
- /memreserve: The firmware defines a reserved range, better keep it
- emmc2bus and pcie0 dma-ranges: The C0T revision of the bcm2711 Soc (as present on rpi 400 and some rpi 4B boards) has different values for these then the B0T revision. So these need to be adjusted to boot on these boards
- blconfig: The firmware defines the memory area where the blconfig stored. Copy those over so it can be enabled.
- /chosen/kaslr-seed: The firmware generates a kaslr seed, take advantage of that.
Signed-off-by: Sjoerd Simons sjoerd@collabora.com Signed-off-by: Antoine Mazeas antoine@karthanis.net
board/raspberrypi/rpi/rpi.c | 48 +++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+)
Reviewed-by: Simon Glass sjg@chromium.org
I wonder if anyone has tried to drop the private firmware on the boards?
At some point copy_property() should move to fdt_support.c if others use it