kernel boot up without using PPCBOOT from flash

kernel boot up without using PPCBOOT from flash

[rekha gvv]

Thanks ,

I was able to solve the staic/shared library problem
by just stripping out the libraries and including them
in the ramdisk .

Now i need to go ahead with booting the kernel without
using PPCBOOT as soon as the power is on.
I dont know from where to start and which files i need
to modify ..
So please help me to go ahead with your suggestions
how to boot kernel from flash ?

Thankyou!

--- Wolfgang Denk <wd@denx.de> wrote:
>
> In message
>
<20030805131112.59750.qmail@web8007.mail.in.yahoo.com>
> you wrote:
> >
> > I am trying to execute certain fileutils
> application
> > like cp ,ls ..
> > These applications are compiled using the Glibc
> 2.2.3
> >
> > The problem is if i compile the applications
> > Statically
> > and try to execute the command cp,ls ..i get the
> > segmentation fault error.Please let me know the
> proper
> > compiler options  for static linking.
>
> Please explain which toolchain you are yusing, which
>  libraries,  and
> which versions of the tools listed above.
>
> > OBJS = cat.o chgrp.o chmod.o chown.o cmp.o cp.o
> dd.o
> > grep.o l.o ln.o ls.o \
> >         mkdir.o mkfifo.o mknod.o more.o mv.o rm.o
> > rmdir.o sync.o touch.o vi.o
>
> Where did you get these object files from?
>
> I have a suspicion that these are  in  fact  parets
> of  the  busybox
> toolbox.  If  this  is  correct,  then  why  don't
> you simply use the
> Makefile that comes with busybox?
>
> > Then i tried to eliminate the problem by using
> shared
> > library that is put the ld.so.1 file and libc.so.6
> > file in the /lib directory of the ramdisk .
> > The problem is the library files are too big in
> size.
> > libc is 5.1mb and ld.so.1 is .5mb
>
> You can strip the shared libraries for the target.
>
> > inorder to create a ramdisk image i have used the
> > initrd.sudo scrip file form the denx SELF package.
> > : ${IRD_SIZE:=4096k}
> >
> > dd if=/dev/zero of=$IMAGE bs=$IRD_SIZE count=1
> > 2>/dev/null
>
> Again, I have the suspicion  that  this  code  comes
>  from  our  SELF
> package.  The  scripts provided by SELF take care of
> all the problems
> you are running in.
>
> > 1.should i use statick linking
>
> No, this will most probably just increasy your
> memory footprint.
>
> > 2.shared library ..
>
> Yes.
>
> What I don't understand: there is a working set of
> tools and scripts.
> You rip it apart, omit essential parts, and then
> complain that it  is
> not working any more.
>
> What else did you expect?
>
> 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
> It is surely a great calamity for  a  human  being
> to  have  no  ob-
> sessions.
>     - Robert Bly
>
>


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Re: kernel boot up without using PPCBOOT from flash

[rekha gvv]

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Hello.

> Just write the Linux kernel image to flash and
> start it from flash using PPCBoot. See also:
> http://www.denx.de/twiki/bin/view/DULG/LinuxInFlash

I wrote the pMulti image into flash 2a00000
ppcboot is at location 2800000
i did the following settings
setenv bootcmd bootm 0x2a00000
and also  did saveenv ...
once i reset the board it just hangs thats it...
even ppcboot promp does not come ..
i have to burn ppcboot again and again in that case ..
i want the kernel to boot up upon power ..
but here even the existing ppcboot doesnt work ..

this is the fliinfo

=>flinfo

Bank # 1: AMD 29F040 or 29LV040 (4 Mbit, uniform
sectors)
  Size: 2 MB in 8 Sectors
  Sector Start Addresses:
    02800000 (RO) 02840000 (RO) 02880000      028C0000
     02900000
    02940000      02980000      029C0000

Bank # 2: AMD 29F040 or 29LV040 (4 Mbit, uniform
sectors)
  Size: 2 MB in 8 Sectors
  Sector Start Addresses:
    02A00000      02A40000      02A80000      02AC0000
     02B00000
    02B40000      02B80000      02BC0000

Bank # 3: AMD 29F040 or 29LV040 (4 Mbit, uniform
sectors)
  Size: 2 MB in 8 Sectors
  Sector Start Addresses:
    02C00000      02C40000      02C80000      02CC0000
     02D00000
    02D40000      02D80000      02DC0000

Bank # 4: AMD 29F040 or 29LV040 (4 Mbit, uniform
sectors)
  Size: 2 MB in 8 Sectors
  Sector Start Addresses:
    02E00000      02E40000      02E80000      02EC0000
     02F00000
    02F40000      02F80000      02FC0000


Bytes transferred = 1685861 (19b965 hex)
=>cp.b 400000 2a00000 19b966
Copy to Flash... done
=>setenv bootcmd bootm 2a00000
=>saveenv
Saving Enviroment to Flash...
Un-Protected 1 sectors
Erasing Flash...
. done
Erased 1 sectors
Writing to Flash... done
Protected 1 sectors
=>Ã  it hangs  at this point.
 how do i go about this problem ?

thanks reagrds

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: kernel boot up without using PPCBOOT from flash

[Wolfgang Denk]

In message <20030809111908.47795.qmail@web8005.mail.in.yahoo.com> you wrote:
>
> I wrote the pMulti image into flash 2a00000
> ppcboot is at location 2800000
> i did the following settings
> setenv bootcmd bootm 0x2a00000
> and also  did saveenv ...
> once i reset the board it just hangs thats it...

This description does NOT match the log you show below:

> =>setenv bootcmd bootm 2a00000
> =>saveenv
> Saving Enviroment to Flash...
> Un-Protected 1 sectors
> Erasing Flash...
> . done
> Erased 1 sectors
> Writing to Flash... done
> Protected 1 sectors
> =>Ã  it hangs  at this point.
>  how do i go about this problem ?

Judging from this output it seems that the board hangs as soon as you
performed the "saveenv" command. Where is the environment  stored  on
your  board? To me this looks like the environment placement for your
board was not configured correctly in U-Boot.

Umm... but this is off topic here.  Let's  move  this  discussion  to
u-boot-users, please.

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
"On two occasions I have been  asked  [by  members  of  Parliament!],
'Pray,  Mr.  Babbage, if you put into the machine wrong figures, will
the right answers come out?' I am not able rightly to  apprehend  the
kind of confusion of ideas that could provoke such a question."
- Charles Babbage

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