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Date: Fri, 28 Dec 2001 12:55:20 -0200
From: Ralf Baechle <ralf@uni-koblenz.de>
To: Vivien Chappelier <vivien.chappelier@enst-bretagne.fr>
Cc: linux-mips@oss.sgi.com, linux-mips@fnet.fr
Subject: Re: weekly O2 patches ;)
Message-ID: <20011228125520.A1323@dea.linux-mips.net>
References: <Pine.LNX.4.21.0112221928160.13229-300000@melkor>
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In-Reply-To: <Pine.LNX.4.21.0112221928160.13229-300000@melkor>; from vivien.chappelier@enst-bretagne.fr on Sat, Dec 22, 2001 at 07:28:44PM +0100
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On Sat, Dec 22, 2001 at 07:28:44PM +0100, Vivien Chappelier wrote:

> diff -Naur linux/arch/mips64/mm/r4xx0.c linux.patch/arch/mips64/mm/r4xx0.c
> --- linux/arch/mips64/mm/r4xx0.c	Sun Dec  9 15:47:14 2001
> +++ linux.patch/arch/mips64/mm/r4xx0.c	Thu Dec 20 19:04:46 2001
> @@ -2141,9 +2141,17 @@
>  	unsigned long flags, addr, begin, end, pow2;
>  	int tmp;
>  
> -	tmp = ((config >> 17) & 1);
> +	/* XXX: disabling secondary cache for now */
> +	change_cp0_config(CONF_SE, 0);	
> +
> +	tmp = ((config >> 17) & 1); /* check if cache present */
>  	if(tmp)
>  		return 0;
> +
> +	tmp = ((config >> 12) & 1); /* check if cache enabled */
> +	if(!tmp)
> +		return 0;
> +
>  	tmp = ((config >> 22) & 3);
>  	switch(tmp) {
>  	case 0:

Perfect.  You just broke R4000SC / R4400SC.

  Ralf