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Re: another 4kc machine check.

To: "Maciej W. Rozycki" <>
Subject: Re: another 4kc machine check.
From: "Kevin D. Kissell" <>
Date: Tue, 12 Apr 2005 18:38:14 +0200
Cc: "Greg Weeks" <>, "Ralf Baechle" <>, <>
Original-recipient: rfc822;
References: <> <> <> <> <> <004a01c53ed4$dab12b00$10eca8c0@grendel> <>
> On Mon, 11 Apr 2005, Kevin D. Kissell wrote:
> > If the 4KC and 4KEC need it, so does the 4KSC (and 4KSD).
>  But that's weird in the first place as 4Kc implements the original 
> revision of MIPS32 so it does not implement "ehb".  Therefore it acts just 
> as an ordinary "nop", but according to the 4K manual there is no need for 
> one -- the hazard between a move to EntryLo0/EntryLo1 and tlbwi/tlbwr is 
> explicitly listed as 0 instructions.

Oops.  Maybe I misread the patch.  I thought the added NOP was between
the TLBWR and the ERET.

            Kevin K.

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