Hi Scott, > On Wed, 17 Nov 2010 13:42:43 +0100 > Detlev Zundel <[email protected]> wrote: > >> > Yes, a simple C tool to take an existing PBL or RCW dump and "espi-ize" >> > it into a PBL dump would be nice. The user will still need to acquire >> > the existing RCW manually. This only needs to be done once on a board; >> > it's not part of building a U-Boot image. >> >> @Scott: What is meant by "acquiring the existing RCW"? Can't we have a >> tool that is fed with a value for RCW? > > I mean that a simple tool could take an existing RCW and modify it for > espi boot, but it needs to take as input an RCW that is valid for other > parameters. > > The least error prone way to do this, for a user that wants to take a > board that's already successfully booting from NOR and make it boot > from eSPI, is to extract the RCW they're already using from the board.
Ok, thanks for the explanation. > Creating an RCW from scratch is more complicated, which is why we > have that javascript tool -- though we could provide some example RCWs > for common configs. Just for my information - it sounds like the RCW is really complex. If RCW still expands to "reset control word", I would expect it to be 32 bits though. It is rather common for U-Boot porters to determine 32-bit values for specific registers without using a javascript tool, so maybe I'm wrong here. >> > This README describes how to build an Image can be used by PBL (pre-boot >> > loader), building u-boot image is the first step, then RCW, PBI >> > commands, XXD dump of u-boot.bin, the tool will combine the RCW and PBI >> > and XXD dump together to produce the PBL XXD file, suppose the PBL XXD >> > file is saved as x.xxd, we need to run "xxd -r x.xxd > pbl_image.bin" to >> > produce the final PBL Image. Take a look at the whole process, I see no >> > way it can be scripted / automatized. >> >> I said it once before, look at how kwbimage wraps up u-boot.bin into >> such an "augmented" image. If the Marvell guys can do this for their >> platform, I see no reason why this cannot be done for your platform. > > Sure, once you have a valid input RCW it should be possible to automate > the rest. For the supported configurations the RCW should be provided of course, so I do not see a big problem here? Cheers Detlev -- Practice random senselessness and act kind of beautiful. -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: [email protected] _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
