linux-kernel - Re: [ORLinux] [PATCH] OpenRISC: Handle r0 with care

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Message-ID: <20120306055211.GA24532@chokladfabriken.org>
Date:	Tue, 6 Mar 2012 07:52:11 +0200
From:	Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>
To:	Richard Weinberger <richard@....at>
Cc:	jonas@...thpole.se, linux-kernel@...r.kernel.org,
	linux@...ts.openrisc.net
Subject: Re: [ORLinux] [PATCH] OpenRISC: Handle r0 with care

On Mon, Mar 05, 2012 at 10:07:07PM +0100, Richard Weinberger wrote:
> @@ -185,8 +186,8 @@ handler:							;\
>  /* ---[ 0x100: RESET exception ]----------------------------------------- */
>  
>  EXCEPTION_ENTRY(_tng_kernel_start)
> +	l.andi r0,r0,0
>  	l.jal	_start
> -	 l.andi r0,r0,0
>  
>  /* ---[ 0x200: BUS exception ]------------------------------------------- */
>  

The OpenRISC architecture features delay slots, so you probably don't want
to do that.

Stefan
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