Date: Wed, 07 May 2008 10:11:39 -0500 From: Nathan Whitehorn <nathanw@uchicago.edu> To: freebsd-ppc@freebsd.org Subject: UMA_MD_SMALL_ALLOC Message-ID: <4821C6AB.3080101@uchicago.edu>
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In doing the G5 port, I have a problem with the UMA_MD_SMALL_ALLOC option. Because the G5 does not have BAT, this is broken. Even if we were to emulate it with pages, this is not a useful thing to have, since the point of the option would be defeated. But removing it would pessimize the G3/G4 port (the AIM code also panics late in boot without it, but that is a separate issue). There doesn't seem to be a way to twiddle it at runtime, which is a major problem if we want to have a single kernel running on all OEA machines. So I'm not sure what to do. Thoughts? Also, an update on the G5 port: the PMAP stuff is done to the point where the kernel boots all the way to panicing about not having a PIC, which is late in the boot process and implies that only device support remains. Trap handling is up and running as well. And (with the exception of UMA_MD_SMALL_ALLOC) the same kernel also boots on my G3. -Nathan
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