On Fri, 2008-07-18 at 20:43 +0200, Marvin wrote: > Hi, > > while trying to cleanup some configs/makefiles for ppc64 I noticed, that > CONFIG_POWER4 implies CONFIG_PPC64 and vice versa in all defconfigs. > So I want to boldly replace CONFIG_POWER4 by CONFIG_PPC64 - ugh.
No, those are different. CONFIG_PPC64 means a 64 bits kernel. CONFIG_POWER4 means a 64 bits kernel that only runs on IBM POWER4 and later (ie, processors conforming to, iirc, version 2.01 or later of the architecture). That is, it's legal to have CONFIG_PPC64 and !CONFIG_POWER4, and this is even necessary if you want to boot on a POWER3 or an RS64 processor. Now, there also used to be some 32 bits support for POWER4 and G5 but that has been dropped a while ago. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
