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From: "Pali Rohár" <pali.rohar@gmail.com>
To: "linux-omap" <linux-omap@vger.kernel.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Aaro Koskinen <aaro.koskinen@iki.fi>,
	Tony Lindgren <tony@atomide.com>,
	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>
Subject: Re: N900 v3.19-rc5 arm atags_to_fdt.c is broken
Date: Fri, 23 Jan 2015 23:36:36 +0100	[thread overview]
Message-ID: <201501232336.36187@pali> (raw)
In-Reply-To: <201501232239.55801@pali>

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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


-- 
Pali Rohár
pali.rohar@gmail.com

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  reply	other threads:[~2015-01-23 22:36 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 [this message]
2015-01-23 23:48   ` Pavel Machek
2015-01-24  9:04     ` Pali Rohár
2015-01-26 16:14   ` Tony Lindgren
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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