From: Mirek23 <miroslaw.dach@psi.ch>
To: linuxppc-dev@ozlabs.org
Subject: Re: U-boot and linux command line parameters
Date: Mon, 25 May 2009 01:41:25 -0700 (PDT) [thread overview]
Message-ID: <23703397.post@talk.nabble.com> (raw)
In-Reply-To: <20090525000618.GD8059@yookeroo.seuss>
Thank you for your answer. When studying the u-boot source code I have found
that
it is indeed register r6 and r7 which pass the location of the command line
parameters and the
size.
The location of the parameters could be changed in u-boot according to the
macro:
CFG_BOOTMAPSZ
There is however the message in all configuration files for u-boot that
Linux can only map first initial 8MB
so it seems to be not possible to set CFG_BOOTMAPSZ to something higher than
8MB?
/*
* For booting Linux, the board info and command line data
* have to be in the first 8 MB of memory, since this is
* the maximum mapped by the Linux kernel during initialization.
*/
#define CFG_BOOTMAPSZ (8 << 20) /* Initial Memory map for
Linux */
Does somebody have an idea how to bypass this limitation in linux 2.6.23 or
higher?
M.
--
View this message in context: http://www.nabble.com/U-boot-and-linux-command-line-parameters-tp23698384p23703397.html
Sent from the linuxppc-dev mailing list archive at Nabble.com.
next prev parent reply other threads:[~2009-05-25 8:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-24 21:38 U-boot and linux command line parameters Mirek23
2009-05-24 21:41 ` Hunter Cobbs
2009-05-25 0:06 ` David Gibson
2009-05-25 8:41 ` Mirek23 [this message]
2009-05-25 17:54 ` Wolfgang Denk
2009-05-25 20:40 ` Mirek23
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