[U-Boot-Users] How to use tftp to book kernel image and mount remote root fs

Steven Woody
2008-05-13T06:34:02Z

On Tue, May 13, 2008 at 2:07 PM, Wolfgang Denk <wd@denx.de> wrote:
> Dear Steven,
>
> in message <ed4892840805121852t46d4c4d0rd52a9eb129121f7b@mail.gmail.com> you wrote:
>>
>> Q1:
>>
>> Both 5.9.5.1 (
http://www.denx.de/wiki/view/DULG/UBootCmdGroupDownload#Section_5.9.5.1.
>> ) and 5.9.5.6 (
>> http://www.denx.de/wiki/view/DULG/UBootCmdGroupDownload#Section_5.9.5.6.
>> ) talk about booting image via network, but there are only few lines
>> of description about these commands. I don't know which one I should
>> use, tftpboot or bootp? And, for each one, what's the requirement on
>
> That depends on what you want to do. Do you understand the differecne
> between TFTP and BOOTP (resp. DHCP) protocols?

I understand tftp and bootp as a function of current DHCP, but I don't
know how tftp and bootp is related. Would you suggest me something to
read? Thank you.

>
>> server side? I've done works described in 4.6, 4.7, 4.8 to setup the
>> server, but I don't sure which one ( tftp, dhcp, nfs ) will really be
>> used.
>
> You can use any of these, depending on what you want to do.
>
> If in doubt, just follow the detailed instructions in section
> "7. Booting Embedded Linux".

Okay, I will re-read section 7 and 9 and go back here if still have
questions. So much thank you for your help.

>
>> Q2:
>>
>> in 9.6.3 ( Root File System on a cramfs File System ), the manual
>> taught how to make a root filesystem image (cramfs), but in the
>> installation ISO, i dont find necessary files rootfs.tar.gz and
>> devices.tar.gz mentioned in the instructions. Where should I get
>
> Please re-read section "9.6. Root File System: Design and Building";
> it contains a detailed step-by-step instruction.
>
>
> Best regards,
>
> Wolfgang Denk
>
> --
> DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> Too many people are ready to carry the stool when the piano needs to
> be moved.