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From: Tony Lindgren <tony@atomide.com>
To: Nicolas Pitre <nico@linaro.org>
Cc: linux-omap <linux-omap@vger.kernel.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Aaro Koskinen" <aaro.koskinen@iki.fi>,
	"Sebastian Reichel" <sre@kernel.org>,
	"Ivaylo Dimitrov" <ivo.g.dimitrov.75@gmail.com>,
	"Pavel Machek" <pavel@ucw.cz>,
	"Russell King" <linux@arm.linux.org.uk>,
	linux-arm-kernel@lists.infradead.org,
	"Laura Abbott" <lauraa@codeaurora.org>,
	"Pali Rohár" <pali.rohar@gmail.com>
Subject: Re: N900 v3.19-rc5 arm atags_to_fdt.c is broken
Date: Mon, 26 Jan 2015 08:14:55 -0800	[thread overview]
Message-ID: <20150126161454.GE28663@atomide.com> (raw)
In-Reply-To: <201501232336.36187@pali>

* Pali Rohár <pali.rohar@gmail.com> [150123 14:39]:
> On Friday 23 January 2015 22:39:55 Pali Rohár wrote:
> > Hello,
> > 
> > when I boot zImage with appended DT n900 in qemu
> > fdt_open_into() function called from file
> > arch/arm/boot/compressed/atags_to_fdt.c (in function
> > atags_to_fdt) always returns -FDT_ERR_NOSPACE.
> > 
> > It means that all ATAGS (including cmdline arguments) passed
> > by bootloader are ignored.
> > 
> > On real n900 device I see that booted DT version also ignore
> > cmdline arguments from bootloader. I cannot debug decompress
> > code on real device, but I think it is same problem as in
> > qemu.
> 
> Looks like this quick patch is fixing above problem:
> 
> diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
> index 68be901..4a7d75b 100644
> --- a/arch/arm/boot/compressed/head.S
> +++ b/arch/arm/boot/compressed/head.S
> @@ -268,7 +268,7 @@ restart:	adr	r0, LC0
>  		 * area.  No GOT fixup has occurred yet, but none of the
>  		 * code we're about to call uses any global variable.
>  		*/
> -		add	sp, sp, #0x10000
> +		add	sp, sp, #0x20000
>  		stmfd	sp!, {r0-r3, ip, lr}
>  		mov	r0, r8
>  		mov	r1, r6
> @@ -289,7 +289,7 @@ restart:	adr	r0, LC0
>  		bleq	atags_to_fdt
>  
>  		ldmfd	sp!, {r0-r3, ip, lr}
> -		sub	sp, sp, #0x10000
> +		sub	sp, sp, #0x20000
>  #endif
>  
>  		mov	r8, r6			@ use the appended device tree

Nico, got any ideas about this one? This seems like a regression
somewhere..

Regards,

Tony
 

  parent reply	other threads:[~2015-01-26 17:05 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-23 21:39 Pali Rohár
2015-01-23 22:36 ` Pali Rohár
2015-01-23 23:48   ` Pavel Machek
2015-01-24  9:04     ` Pali Rohár
2015-01-26 16:14   ` Tony Lindgren [this message]
2015-01-26 16:23     ` Pali Rohár
2015-01-26 17:03       ` Tony Lindgren
2015-01-26 18:57         ` Nicolas Pitre
2015-01-26 21:48           ` Pavel Machek
2015-01-27  0:06             ` Nicolas Pitre
2015-01-27 13:37           ` Pavel Machek
2015-01-27 15:16             ` Nicolas Pitre
2015-01-27 15:26               ` Pali Rohár
2015-01-27 15:26               ` Tony Lindgren
2015-01-27 17:53               ` Russell King - ARM Linux
2015-01-27 18:50                 ` Nicolas Pitre
2015-01-27 23:09                   ` Aaro Koskinen
2015-01-27 23:17                   ` Pavel Machek
2015-02-02 13:39               ` Pavel Machek
2015-02-02 13:56                 ` Nicolas Pitre

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