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Re: [PATCH] Bring back R4600 V1.7 support

To: Ralf Baechle <>
Subject: Re: [PATCH] Bring back R4600 V1.7 support
From: "Maciej W. Rozycki" <>
Date: Tue, 20 Aug 2002 16:36:55 +0200 (MET DST)
Cc: Jan-Benedict Glaw <>, SGI MIPS list <>
In-reply-to: <>
Organization: Technical University of Gdansk
On Tue, 20 Aug 2002, Ralf Baechle wrote:

> I was thinking about that already but the erratas don't provide enough
> details.  The only problem I can see is that ll/sc are fairly slow on some

 Well, IDT didn't seem much mobilized with my single query.  Maybe if
there was more interest expressed, someone would go digging through old
resources for real.

> architectures.  They're supposed to be quite light according to the docs
> but in reality I benchmarked ~ 13 cycles for a spinlock on a R10000 and
> ~ 44 on a more recent chip.

 Well, the code would only execute on an R4600 V1.7... 

+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+        e-mail:, PGP key available        +

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