Fwd: Cache mappings and invalidate

Joakim Tjernlund joakim.tjernlund at lumentis.se
Mon Dec 3 05:24:26 EST 2001

> joakim.tjernlund at lumentis.se said:
> > Can it be the MV kernel?
> I don't see why.
I don't think so either, it was just a wild guess.

> > I am trying to get 2.4.16-pre1 from ppclinux running but I get a lot
> > of oops messages( see below). Its very easy to generate this opps,
> > just mount JFFS2 and copy a file a few times. 
> It's dying in lumentis_write - that's your map driver, isn't it? Check the 
> code at 0xc00b12e8, compare the register it's dereferencing with the 
> address it's _supposed_ to be using, etc.

The same code works fine in MV's kernel and there is not much to debug,
lumentis_write32() looks the same as rpx_write32(). Anyhow, I have
received one report that indicates that the latest kernels from
linuxppc_2_4 are broken w.r.t mpc_860 
> Check bus timings, etc.
I have, over and over again. I also lowered my bus speed to make sure it's not
a timing issue.

> --
> dwmw2

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