Re: [patch 1/5] SiByte fixes for 2.6.12

["Maciej W. Rozycki" <macro@linux-mips.org>]

On Sat, 1 Oct 2005, Ralf Baechle wrote:

> >  Of course if your TLB is indeed different from that of the R4k, then you 
> > shouldn't be setting cp0.config.mt to 1 in the first place...
> 
> The reason was primarily the tiny bit of extra performance because the
> SB1 doesn't need the hazard handling overhead.  Also tlb-sb1 has a few

 That's hardly a justification for duplicating all the code; I've thought 
the reason was actually historical -- hadn't it been simply written 
separately initially and never got merged properly afterwards?

> changes that are needed to initialize a TLB in undefined state after
> powerup.  That was needed to run Linux on firmware-less SB1 cores.

 But that's true about the power-up state of the TLB on any MIPS CPU, 
isn't it?

  Maciej