On Fri, Jun 23, 2017 at 4:24 PM, Rob Clark robdclark@gmail.com wrote:
On Fri, Jun 23, 2017 at 10:32 AM, Tom Rini trini@konsulko.com wrote:
On Tue, Jun 20, 2017 at 05:55:25PM -0400, Rob Clark wrote:
Signed-off-by: Rob Clark robdclark@gmail.com
Maybe there is a better way to not hardcode this? But at least with the build of lk that I have, the fdt table is at 0x81e00000. I guess there must be a more robust way to do this, since presumably lk when booting the linux kernel directly somehow passes the fdt address.
I would assume that lk does what Documentation/arm64/booting.txt describes and places the physical address in x0, so you might be able to implement a save_boot_params that saves this information for later use? Perhaps even make this somewhat generic for armv8 as there's probably other cases where U-Boot is being called in this manner? Thanks!
yup.. figured this out.. I have a WIP patch to actually use the fdt that the fw passes to u-boot (instead of appending the fdt to u-boot).. haven't wired it up to setenv_hex() yet, but that should be trivial.
fwiw, I have a WIP u-boot equiv to linux's simplefb display driver that can inherit the scanout setup by fw (and some related patches) plus lk patches to create a chosen/framebuffer simple-framebuffer node.. need to clean up and send out some of my pending stack of patches, but been buried in figuring out u-boot reloc stuff to figure out how to not get the vaddr space associated w/ fw configured framebuffer reloc'd.
(and just in-case that wasn't clear, ignore patch 2/2.. but 1/2 is still valid)
BR, -R