On Wed, 08 Feb 2006 20:50:50 +0100, tobias.netzel wrote: > The NUPowr G3 upgrades for the PDS slot are working without any problems in > Linux. > They worked with MkLinux and as Raylynn wrote his own one is also working > with the monolithic Linux kernel.
That's good to hear. > So I think the Linux kernel will use the CPU that actually performs the jump > into the kernel code. Initially, yes, but after that, the kernel has the potential to do anything it wants. It would be possible to put code in the kernel to choose a CPU, and such code is already there for certain other machines that are not directly related to this project. > And it seems that the NUPowr PDS card remains active when the BootX > bootstrap enters the supervisor mode in the 68k emulation (and by that trick > also gets into PPC supervisor mode) while with the Sonnet card(s) this > procedure reactivates the 601 CPU. If that's true, then I would guess (maybe very wrongly) that Sonnet is using a Privilege Exception handler as the only means of access to the upgrade CPU, in which case such code from Sonnet must be duplicated in the Linux kernel. It would be great if Sonnet had some kind of developer-support contact that Linux pioneers could address. If that doesn't happen, the ideal would become the clean-room reverse-engineering of Sonnet's code. However, I doubt that we will ever have enough people to accomplish it in that way. It would be repugnant to intentionally add code to Linux that anybody derived from their own personal disassembly of Sonnet's code in direct defiance of their license agreement, which should only be proposed as a last resort, if even at all. ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 _______________________________________________ Nubus-pmac-users mailing list Nubus-pmac-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nubus-pmac-users
