> From: Liu Dave-R63238 <r63...@freescale.com> > To: Andre Schwarz <andre.schw...@matrix-vision.de> > Cc: Wood Scott-B07421 <b07...@freescale.com>, ku...@theia.denx.de, Tabi > Timur-B04825 <b04...@freescale.com>, Phillips Kim-R1AAHA > <r1a...@freescale.com>, Gala <ga...@kernel.crashing.org>, U-Boot List > <u-boot@lists.denx.de> > Date: 2010/11/15 17:58 > Subject: Re: [U-Boot] [PATCH] mpc83xx: Make it boot again > Sent by: u-boot-boun...@lists.denx.de > > > The experts found an issue within init code and it looks like a proper > > patch will be added to mainline shortly. > > The discussion of the proper fix is right in this thread ... > > It should be timing issue in the SoC, software did not have a proper > process to handle > IMMR registers accessing. > > I agree Kumar on this. > Adding the read back with load is needing for the LAW window changing. > And something like sync/eieio instruction also need to be added between > stw and lwz... > to have a proper order accessing.
After adding some more stuff in start.S I find that a lwz isn't enough. An extra isync fixes this though lwz r4, LBLAWAR1(r3) isync So something is missing but what? I guess isync isn't it either but it works for now. Jocke _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
