Kernel boot

Kernel boot

[Srini Amble]

I am using ELDK-2.0 to create a bootable kernel image for PPC8xx. I have
PPCBoot on my target and I want to download the kernel from the host to the
target using TFTP boot. I have verified that I can transfer the image via
TFTP boot. I am creating the initrd image using the following sequence of
commands.

1. make config
2. make dep
3. make clean
4. make zImage.initrd
5. Compress the "zvmlinux.initrd" executable using "gzip"
6. Execute mkimage command to prepare it for "ppcboot"

After the image is downloaded the kernel image is uncompressed without any
errors. But then I get the messsage "No initrd" and the system no longer
responds. Can one of you please point to where I may be going wrong?

Thanks in anticipation

Srini

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Re: Kernel boot

[Wolfgang Denk]

In message <200302101644.53246.samble@xopnetworks.com> you wrote:
>
> I am using ELDK-2.0 to create a bootable kernel image for PPC8xx. I have
> PPCBoot on my target and I want to download the kernel from the host to the
> target using TFTP boot. I have verified that I can transfer the image via
> TFTP boot. I am creating the initrd image using the following sequence of
> commands.

There is basicly zero relevance to Linux so this is off topic on this
list. You should ask this on the U-Boot-Users mailing list instead.

> 1. make config
> 2. make dep
> 3. make clean

OK so far.

> 4. make zImage.initrd

Wrong. Please see the README for instructions how to  build  a  Linux
image for use with U-Boot / PPCBoot.

> 5. Compress the "zvmlinux.initrd" executable using "gzip"

Twice wrong.

> 6. Execute mkimage command to prepare it for "ppcboot"

Completely bogus.

> responds. Can one of you please point to where I may be going wrong?

Please read the available documentation.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
No question is too silly to ask. Of course, some  questions  are  too
silly to to answer...  - L. Wall & R. L. Schwartz, _Programming Perl_

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RE: Kernel boot

[wolfgang.grandegger]

>-- Original Message --
>From: Srini Amble <samble@xopnetworks.com>
>Reply-To: samble@xopnetworks.com
>To: Linuxppc-Embedded <linuxppc-embedded@lists.linuxppc.org>
>Subject: Kernel boot
>Date: Mon, 10 Feb 2003 16:44:53 -0600
>
>
>
>I am using ELDK-2.0 to create a bootable kernel image for PPC8xx. I have
>PPCBoot on my target and I want to download the kernel from the host to
the
>target using TFTP boot. I have verified that I can transfer the image via
>TFTP boot. I am creating the initrd image using the following sequence of
>commands.
>
>1. make config
>2. make dep
>3. make clean
>4. make zImage.initrd
>5. Compress the "zvmlinux.initrd" executable using "gzip"
>6. Execute mkimage command to prepare it for "ppcboot"
>
>After the image is downloaded the kernel image is uncompressed without any
>errors. But then I get the messsage "No initrd" and the system no longer
>responds. Can one of you please point to where I may be going wrong?

For PPCBoot you normally build a pImage with:

 make pImage

and building a RAMDisk image is done differently as well. Have a
look to chapter 5 and 6 of the DENX PPCBoot and Linux Guide at http://www.denx.de/doc/TQM8xxL/.
The ELDK 2.0 comes already with
a working pRamdisk image provided by the RPM package SELF.It can
be found in "ppc_8xx/images". You need the SRPM if you want to
modify it. Also check ftp://ftp.denx.de/pub/LinuxPPC/usr/src/SELF/.

Hope it helps,

Wolfgang.


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