From: Rob Herring <robherring2@gmail.com>
To: Wolfgang Denk <wd@denx.de>, Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Mitch Bradley <wmb@firmworks.com>, U-Boot <u-boot@lists.denx.de>,
"devicetree-discuss@lists.ozlabs.org"
<devicetree-discuss@lists.ozlabs.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: Where to put a large bootloader-supplied device tree on ARM ?
Date: Thu, 12 Jul 2012 20:28:22 -0500 [thread overview]
Message-ID: <4FFF79B6.6040508@gmail.com> (raw)
In-Reply-To: <20120712214743.2160B202A3F@gemini.denx.de>
On 07/12/2012 04:47 PM, Wolfgang Denk wrote:
> Dear Albert ARIBAUD,
>
> In message <20120712233801.0411daa7@lilith> you wrote:
>>
>> If I'm not mistaken, yes U-Boot loads itself as high as it can, and I don't
>> know about the FDT, but no, U-Boot does not "like" to load initrd "just
>> below that": it loads initrd where the boot commands tell it to, and the
>> boot commands are written by board developers. Nothing in U-Boot forces
>> initrd to be loaded as high as possible.
u-boot loads the initrd where you tell it, then bootm relocates it for
some reason.
>>
>> That leaves the question of the FDT, though -- I'm not familiar enough
>> with it (yet) to tell if it is always located just under U-Boot or if
>> its placement is controllable by board commands.
>
> You can always just set the "fdt_high" and "initrd_high" evironment
> variables to restrict the positioning of initrd and FDT in RAM; see
> the README for details.
Yes, I'm aware of all this, but this is not the default behavior and the
default behavior will not work in this case. It also has another bug
related to the relocation that I fixed:
http://www.mail-archive.com/u-boot@lists.denx.de/msg86475.html
Rob
WARNING: multiple messages have this Message-ID (diff)
From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [U-Boot] Where to put a large bootloader-supplied device tree on ARM ?
Date: Thu, 12 Jul 2012 20:28:22 -0500 [thread overview]
Message-ID: <4FFF79B6.6040508@gmail.com> (raw)
In-Reply-To: <20120712214743.2160B202A3F@gemini.denx.de>
On 07/12/2012 04:47 PM, Wolfgang Denk wrote:
> Dear Albert ARIBAUD,
>
> In message <20120712233801.0411daa7@lilith> you wrote:
>>
>> If I'm not mistaken, yes U-Boot loads itself as high as it can, and I don't
>> know about the FDT, but no, U-Boot does not "like" to load initrd "just
>> below that": it loads initrd where the boot commands tell it to, and the
>> boot commands are written by board developers. Nothing in U-Boot forces
>> initrd to be loaded as high as possible.
u-boot loads the initrd where you tell it, then bootm relocates it for
some reason.
>>
>> That leaves the question of the FDT, though -- I'm not familiar enough
>> with it (yet) to tell if it is always located just under U-Boot or if
>> its placement is controllable by board commands.
>
> You can always just set the "fdt_high" and "initrd_high" evironment
> variables to restrict the positioning of initrd and FDT in RAM; see
> the README for details.
Yes, I'm aware of all this, but this is not the default behavior and the
default behavior will not work in this case. It also has another bug
related to the relocation that I fixed:
http://www.mail-archive.com/u-boot at lists.denx.de/msg86475.html
Rob
WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robherring2@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] Where to put a large bootloader-supplied device tree on ARM ?
Date: Thu, 12 Jul 2012 20:28:22 -0500 [thread overview]
Message-ID: <4FFF79B6.6040508@gmail.com> (raw)
In-Reply-To: <20120712214743.2160B202A3F@gemini.denx.de>
On 07/12/2012 04:47 PM, Wolfgang Denk wrote:
> Dear Albert ARIBAUD,
>
> In message <20120712233801.0411daa7@lilith> you wrote:
>>
>> If I'm not mistaken, yes U-Boot loads itself as high as it can, and I don't
>> know about the FDT, but no, U-Boot does not "like" to load initrd "just
>> below that": it loads initrd where the boot commands tell it to, and the
>> boot commands are written by board developers. Nothing in U-Boot forces
>> initrd to be loaded as high as possible.
u-boot loads the initrd where you tell it, then bootm relocates it for
some reason.
>>
>> That leaves the question of the FDT, though -- I'm not familiar enough
>> with it (yet) to tell if it is always located just under U-Boot or if
>> its placement is controllable by board commands.
>
> You can always just set the "fdt_high" and "initrd_high" evironment
> variables to restrict the positioning of initrd and FDT in RAM; see
> the README for details.
Yes, I'm aware of all this, but this is not the default behavior and the
default behavior will not work in this case. It also has another bug
related to the relocation that I fixed:
http://www.mail-archive.com/u-boot at lists.denx.de/msg86475.html
Rob
next prev parent reply other threads:[~2012-07-13 1:28 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-03 14:22 [PATCH v2 00/12] IRQ, GPIO SPI, I2C, etc DTC support Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-1-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 14:22 ` [PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-05 8:15 ` Andrew Lunn
[not found] ` <1341325365-21393-2-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 9:02 ` Thomas Petazzoni
2012-07-05 9:02 ` Thomas Petazzoni
2012-07-05 9:48 ` Andrew Lunn
2012-07-05 9:48 ` Andrew Lunn
2012-07-05 10:11 ` Arnaud Patard
2012-07-05 10:11 ` Arnaud Patard (Rtp)
[not found] ` <87sjd6ikkj.fsf-0gaJ4kiyQU6khWr4QmshqB2eb7JE58TQ@public.gmane.org>
2012-07-05 10:20 ` Thomas Petazzoni
2012-07-05 10:20 ` Thomas Petazzoni
2012-07-05 10:38 ` Arnaud Patard
2012-07-05 10:38 ` Arnaud Patard (Rtp)
[not found] ` <87liiyijb8.fsf-0gaJ4kiyQU6khWr4QmshqB2eb7JE58TQ@public.gmane.org>
2012-07-05 11:42 ` Thomas Petazzoni
2012-07-05 11:42 ` Thomas Petazzoni
2012-07-05 11:48 ` Andrew Lunn
2012-07-05 11:48 ` Andrew Lunn
[not found] ` <20120705114815.GT17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 12:09 ` Sebastian Hesselbarth
2012-07-05 12:09 ` Sebastian Hesselbarth
[not found] ` <20120705094824.GO17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 10:10 ` Thomas Petazzoni
2012-07-05 10:10 ` Thomas Petazzoni
2012-07-05 10:25 ` Andrew Lunn
2012-07-05 10:25 ` Andrew Lunn
2012-07-05 12:58 ` Thomas Petazzoni
2012-07-05 12:58 ` Thomas Petazzoni
2012-07-05 13:15 ` Andrew Lunn
2012-07-05 13:15 ` Andrew Lunn
[not found] ` <20120705131522.GW17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 13:28 ` Thomas Petazzoni
2012-07-05 13:28 ` Thomas Petazzoni
2012-07-05 13:33 ` Andrew Lunn
2012-07-05 13:36 ` Thomas Petazzoni
2012-07-05 12:25 ` Arnd Bergmann
2012-07-05 12:25 ` Arnd Bergmann
[not found] ` <201207051225.55390.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-05 13:08 ` Andrew Lunn
2012-07-05 13:08 ` Andrew Lunn
[not found] ` <20120705130819.GV17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 13:47 ` Arnd Bergmann
2012-07-05 13:47 ` Arnd Bergmann
[not found] ` <201207051347.38887.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-05 13:54 ` Andrew Lunn
2012-07-05 13:54 ` Andrew Lunn
[not found] ` <20120705135449.GZ17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 15:47 ` Arnd Bergmann
2012-07-05 15:47 ` Arnd Bergmann
2012-07-05 14:14 ` Sebastian Hesselbarth
2012-07-05 14:14 ` Sebastian Hesselbarth
[not found] ` <4FF5A15A.8070309-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2012-07-05 14:43 ` Andrew Lunn
2012-07-05 14:43 ` Andrew Lunn
2012-07-05 14:54 ` Arnd Bergmann
2012-07-05 14:54 ` Arnd Bergmann
[not found] ` <201207051454.24475.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-05 15:51 ` Sebastian Hesselbarth
2012-07-05 15:51 ` Sebastian Hesselbarth
[not found] ` <4FF5B7F9.9020507-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2012-07-05 16:30 ` Arnaud Patard
2012-07-05 16:30 ` Arnaud Patard (Rtp)
2012-07-05 16:16 ` Andrew Lunn
2012-07-05 16:16 ` Andrew Lunn
[not found] ` <20120705161600.GA28860-g2DYL2Zd6BY@public.gmane.org>
2012-07-06 20:08 ` Arnd Bergmann
2012-07-06 20:08 ` Arnd Bergmann
[not found] ` <201207062008.23952.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-06 21:00 ` Andrew Lunn
2012-07-06 21:00 ` Andrew Lunn
[not found] ` <20120706210009.GC11470-g2DYL2Zd6BY@public.gmane.org>
2012-07-07 0:24 ` Where to put a large bootloader-supplied device tree on ARM ? Mitch Bradley
2012-07-07 0:24 ` Mitch Bradley
[not found] ` <4FF781D8.3040206-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-07 1:23 ` David VomLehn (dvomlehn)
2012-07-07 1:23 ` David VomLehn (dvomlehn)
[not found] ` <2966DB01BC317A4DA23684BA0F653415013701-WE/xwOPrfQKHONfmNwMhBaBKnGwkPULj@public.gmane.org>
2012-07-07 1:59 ` Mitch Bradley
2012-07-07 1:59 ` Mitch Bradley
[not found] ` <4FF7980E.7050705-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-09 4:30 ` Nicolas Pitre
2012-07-09 4:30 ` Nicolas Pitre
[not found] ` <alpine.LFD.2.02.1207090015270.31100-QuJgVwGFrdf/9pzu0YdTqQ@public.gmane.org>
2012-07-12 6:52 ` Mitch Bradley
2012-07-12 6:52 ` Mitch Bradley
[not found] ` <4FFE743B.6080504-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-12 18:16 ` Nicolas Pitre
2012-07-12 18:16 ` Nicolas Pitre
2012-07-12 20:34 ` Rob Herring
2012-07-12 20:34 ` [U-Boot] " Rob Herring
2012-07-12 20:34 ` Rob Herring
2012-07-12 21:38 ` Albert ARIBAUD
2012-07-12 21:38 ` [U-Boot] " Albert ARIBAUD
2012-07-12 21:38 ` Albert ARIBAUD
2012-07-12 21:47 ` Wolfgang Denk
2012-07-12 21:47 ` [U-Boot] " Wolfgang Denk
2012-07-12 21:47 ` Wolfgang Denk
2012-07-13 1:28 ` Rob Herring [this message]
2012-07-13 1:28 ` Rob Herring
2012-07-13 1:28 ` Rob Herring
[not found] ` <4FFF79B6.6040508-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-07-13 6:45 ` Albert ARIBAUD
2012-07-13 6:45 ` Albert ARIBAUD
2012-07-13 6:45 ` Albert ARIBAUD
2012-07-05 18:36 ` [PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers Mitch Bradley
2012-07-05 18:36 ` Mitch Bradley
2012-07-03 14:22 ` [PATCH v2 02/12] SPI: Refactor spi-orion to use SPI framework queue Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 03/12] spi-orion: remove uneeded spi_info Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 04/12] spi-orion: add device tree binding Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 05/12] ARM: kirkwood: use devicetree for orion-spi Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 06/12] ARM: kirkwood: use devicetree for SPI on dreamplug Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 07/12] I2C: MV64XXX: Add Device Tree support Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-8-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 15:59 ` Florian Fainelli
2012-07-03 15:59 ` Florian Fainelli
2012-07-03 16:58 ` Andrew Lunn
2012-07-03 16:58 ` Andrew Lunn
[not found] ` <20120703165839.GA1519-g2DYL2Zd6BY@public.gmane.org>
2012-07-04 19:49 ` Florian Fainelli
2012-07-04 19:49 ` Florian Fainelli
2012-07-05 6:52 ` Andrew Lunn
2012-07-05 6:52 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 08/12] Kirkwood: Add basic device tree support for QNAP TS219 Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-9-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 15:47 ` Florian Fainelli
2012-07-03 15:47 ` Florian Fainelli
2012-07-03 17:09 ` Andrew Lunn
2012-07-03 17:09 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 09/12] ARM: Kirkwood: DTify the watchdog timer Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 10/12] ATA: sata_mv: Add device tree support Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 11/12] ARM: Kirkwood: Use DT to configure SATA device Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-12-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 14:52 ` Josh Coombs
2012-07-03 14:52 ` Josh Coombs
[not found] ` <CAMW5Ufa2bsYs9VD2g9hJWKpcQNcZt+WXCA1ohYoHeLk9SambSg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-07-03 15:32 ` Andrew Lunn
2012-07-03 15:32 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 12/12] Crypto: CESA: Add support for DT based instantiation Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-13-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 15:50 ` Florian Fainelli
2012-07-03 15:50 ` Florian Fainelli
2012-07-03 17:03 ` Andrew Lunn
2012-07-03 17:03 ` Andrew Lunn
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