On Thursday 10 January 2008, Josh Boyer wrote: > On Thu, 10 Jan 2008 13:38:12 -0500 > > Sean MacLennan <[EMAIL PROTECTED]> wrote: > > What exactly does this function do? > > > > /* Quiesce the MAL and EMAC(s) since PIBS/OpenBIOS don't > > * do this for us > > */ > > > > On the taco, with the 440EP, it doesn't seem to make any difference if I > > call this or not. Since I am using u-boot, is it not needed? > > There are firmwares that do not reset the EMAC and MAL before passing > control to the client program (Linux in our case). This can cause > weird things to happen, like spurious interrupts or DMAs from the > hardware overwriting kernel memory. So we quiesce the hardware really > early on those. > > I don't believe U-Boot has that problem. If it does, it should be > fixed :)
No, U-Boot doesn't have this problem. Best regards, Stefan ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: [EMAIL PROTECTED] ===================================================================== _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
