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From: Alexey.Brodkin@synopsys.com (Alexey Brodkin)
To: linux-snps-arc@lists.infradead.org
Subject: [PATCH] arc: Removed local initramfs source file from axs101 configuration.
Date: Mon, 11 Jan 2016 07:59:47 +0000	[thread overview]
Message-ID: <1452499187.3277.3.camel@synopsys.com> (raw)
In-Reply-To: <C2D7FE5348E1B147BCA15975FBA23075F4E843B4@us01wembx1.internal.synopsys.com>

Hi Vineet,

On Mon, 2016-01-11@07:47 +0000, Vineet Gupta wrote:
> On Saturday 09 January 2016 05:55 AM, Carlos Palminha wrote:
> > Hi Alexey,
> > 
> > Probably my e-mail comments before the patch mislead you...
> > If you download the kernel source and try to compile it, it won't work because of the INITRAMFS pointing to a non
> > -existing directory. (check log below)
> > 
> > That's why that option should be removed from the standard kernel.
> 
> Since the axs101 DT cmdline lacks any reference to root device - how does this
> unmodified kernel boot anyways w/o changing DT. Does uboot provide the cmdline for
> rootfs ?

Indeed if initramfs is not built-in vmlinux/uImage then kernel command-line
must be adjusted to point to real root device.

This could be done in 2 ways:

 [1] Manually modify "bootargs" value in arch/arc/boot/dts/axs10{1|3}.dts
 [2] In case of U-Boot it's possible to load device tree blob together with uImage
     and in that case U-Boot's "bootargs" env variable will override the one in .dtb

-Alexey

  reply	other threads:[~2016-01-11  7:59 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-04 14:55 [PATCH] arc: Removed local initramfs source file from axs101 configuration CARLOS.PALMINHA
2016-01-07 23:20 ` Alexey Brodkin
2016-01-09  0:25   ` Carlos Palminha
2016-01-11  7:47     ` Vineet Gupta
2016-01-11  7:59       ` Alexey Brodkin [this message]
2016-01-13  1:13       ` Carlos Palminha

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