[U-Boot] [PATCH 00/12] Enable returning back to BootROM from spear SPL

[Miquel Raynal]

Hi Stefan,

Stefan Roese <sr at denx.de> wrote on Tue, 7 May 2019 14:50:02 +0200:

> On 07.05.19 14:18, Miquel Raynal wrote:
> > Spear machines currently have only the possibility to boot from NOR
> > while an interesting alternative exist: booting from USB. For this,
> > the BootROM will enumerate an USB device and wait for a RAM driver
> > (likely, the SPL). It will load the driver in SRAM and jump to
> > it. Once the initialization done, the SPL must return back into the
> > BootROM so that another enumeration occurs allowing the user to upload
> > the full Bootloader (eg. U-Boot). The BootROM will finally load the
> > file in RAM and jump into it.
> > 
> > Most of the patches are cleanups and preparation work to ease the
> > reading of the main assembly file.
> > 
> > The last patch is a fallback on USB Boot if the NOR is empty or
> > corrupted. Of course if USB boot has not been enabled, nothing will
> > happen.
> > 
> > Tested on a custom board featuring a SPEAr600.
> > 
> > Hope this change will find users!  
> 
> Many thanks for working on this and improving the neglected SPEAr
> U-Boot port. It's quite some time since I worked on this platform
> and I still do have a x600 board hidden somewhere. Frankly, if
> there is no real need I will not dig this board up to update and
> test a new U-Boot version on it (sorry).

Absolutely no problem, thanks for reviewing!

Miquèl