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Re: port-macppc/48600: Add support for powermac 7200/PPC 601
The following reply was made to PR port-macppc/48600; it has been noted by
From: Michael <macallan%netbsd.org@localhost>
Subject: Re: port-macppc/48600: Add support for powermac 7200/PPC 601
Date: Sun, 16 Feb 2014 21:25:54 -0500
> 2) Use rtc realtime register instead of timebase register, which 601
> doesn't have. It's possible I may have missed some asm calls to mftb/mttb
> 3) alignment exceptions - the 601 will throw alignment exceptions if
> operands cross page boundaries. I updated trap.c to handle that, and
> changed memcpy.S to always use byte-copy (not word-copy) when in kernel.
> There may be a more optimal way to handle. Also, I'm not that familiar with
> other powerpc's, so my handler changes may need tweaking for other cpus
That's strange, port-rs6k and port-prep were supposed to work on 601s. I never
verified this though.
> 4) use CPUFLAGS+= -mcpu=601. Also, the kernel apparently has to be < 4M
> to netboot
That seems to be an OF limitation, I've seen it on other macs as well.
> 5) /platinum video - video console is not working. I'm not that familar
> with this area, but I'll be glad to test any changes
I'm fairly familiar with this kind of work ;)
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