From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rajat Jain" Subject: Re: How does boot loader tell the kernel, the location of initrd? Date: Fri, 16 Mar 2007 10:42:30 +0530 Message-ID: References: <20070315161718.GB16545@ba.sec> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=kfnUQk9BzgxG2cu/VVcdMYuZYY4i3Wp0QpRthfQ4Tb1a6tmp4rkfm926JWn2otPJi4Z1DvTmwoLgl2CyadU0TLb1oi9ORsBcuGml5nOtOgSktW/0DXAW/Ze68ml3rXQ16oNn2xOV75LeCeCvsfuGWmaoJqMGg5TJkhiQCRSjDug= In-Reply-To: <20070315161718.GB16545@ba.sec> Content-Disposition: inline Sender: linux-newbie-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Thierry Reding , Thiemo Seufer Cc: kernelnewbies@nl.linux.org, newbie , linux-mips@linux-mips.org > > I am experimenting with initrd and my initrd fails to mount. My > > bootloader (U-BOOT) coorectly loads the initrd into RAM as I can see. > > > > I am wondering how does the kernel get to know the address at which > > the initrd is loaded by boot loader? How does the boot loader > > communicate this to the kernel? > > > > Any code references will be appreciated. > > Perhaps lib_mips/mips_linux.c in the U-Boot tree is what you are looking for. > That code sets up environment parameters that are parsed by the Linux kernel > later on (see rd_start_early() and friends in arch/mips/kernel/setup.c in the > Linux tree). Thanks! That is exactly what I was looking for. However, I noticed that U-BOOT passes these parameters in environment variables, where as Linux kernel expects them as command l ine arguments. It wasn't working for me untill I made changes in U-BOOT to pass them in command line arguments. Why is this discrepancy in U-BOOT and the kernel? Are other people working on the (linux+U-BOOT) combo making the changes that I did? Thanks,, Rajat - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs