Porting ofw to custom board

[Max Ruttenberg]

      Hi all,

I'm interested in porting ofw to a board with QorIQ ppce5500
processor. The board currently uses U-Boot as its primary and
secondary boot loader.

Is it possible to boot into an ofw image from U-Boot?
Is there a porting guide?

Thank you,
Max

-- 
Max Ruttenberg,
Member of the Technical Staff
Emu Technology
270 W 39th St. #1302
New York, NY 10018

[Artyom Tarasenko]

      On Wed, Nov 29, 2017 at 2:56 PM, Max Ruttenberg
<mruttenberg(a)emutechnology.com> wrote:
  Hi all,

 I'm interested in porting ofw to a board with QorIQ ppce5500
 processor. The board currently uses U-Boot as its primary and
 secondary boot loader.

 Is it possible to boot into an ofw image from U-Boot?
Looks like it should work:
cpu/ppc/ppcboot.fth has some references:
[ifdef] uboot-entry
...

Also there is an utility to create U-Boot-format images:
cpu/ppc/olpc/fwuboot.bth

  Is there a porting guide?
Sort of:
http://wiki.laptop.org/go/Cross_Compiling_Open_Firmware

Note that for PPC-based platforms it's a bit easier as there is a
cross-platform wrapper ppcforth,
so you don't have to mess with qemu user mode emulation.


-- 
Regards,
Artyom Tarasenko

SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu