Compile new kernel for 5200B w/ ELDK

Compile new kernel for 5200B w/ ELDK

[Albrecht Dreß]

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Hi all,

please excuse a probably really dumb question about compiling a new  
kernel for a Freescale 5200B using the ELDK 4.2...

I am playing with a Lite5200B eval board.  The software coming from  
Freescale, including an older kernel (2.6.16.11-rt18), works fine.

I installed ELDK 4.2 on a FC box, and first compiled u-boot 1.3.4.   
Wrote it to flash, and it works nicely afaict.

Then I compiled the 2.6.24.2 kernel coming with the ELDK, using the  
commands "make ARCH=powerpc CROSS_COMPILE=ppc_6xx- lite5200_defconfig ;  
make ARCH=powerpc CROSS_COMPILE=ppc_6xx- uImage".  The kernel loads,  
decompresses, but then there is no output any more after "Uncompressing  
Kernel Image ... OK".  The u-boot environment contains (quoted from  
printenv) "bootargs=console=ttyPSC0,115200 root=/dev/mtdblock0 rw  
rootfstype=jffs2 verbose" (and, again, the Freescale kernel is not  
silent).

I found a message which stated that I should include

<snip>
         chosen {
                 linux,stdout-path = "/soc5200@f0000000/serial@2000";
	};
</snip>

in the file arch/powerpc/boot/dts/lite5200.dts.  Recompiled, but  
without success.  I believe it's a minor tweak I need to add, but I  
don't have a clue what.  Unfortunately neither the wiki nor Google gave  
answers.  Can anyone enlighten me??

Thanks,
Albrecht.

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Re: Compile new kernel for 5200B w/ ELDK

[Detlev Zundel]

Hi Albrecht,

> please excuse a probably really dumb question about compiling a new  
> kernel for a Freescale 5200B using the ELDK 4.2...
>
> I am playing with a Lite5200B eval board.  The software coming from  
> Freescale, including an older kernel (2.6.16.11-rt18), works fine.
>
> I installed ELDK 4.2 on a FC box, and first compiled u-boot 1.3.4.   
> Wrote it to flash, and it works nicely afaict.
>
> Then I compiled the 2.6.24.2 kernel coming with the ELDK, using the  
> commands "make ARCH=powerpc CROSS_COMPILE=ppc_6xx- lite5200_defconfig ;  
> make ARCH=powerpc CROSS_COMPILE=ppc_6xx- uImage".  The kernel loads,  
> decompresses, but then there is no output any more after "Uncompressing  
> Kernel Image ... OK".  The u-boot environment contains (quoted from  
> printenv) "bootargs=console=ttyPSC0,115200 root=/dev/mtdblock0 rw  
> rootfstype=jffs2 verbose" (and, again, the Freescale kernel is not  
> silent).
>
> I found a message which stated that I should include
>
> <snip>
>          chosen {
>                  linux,stdout-path = "/soc5200@f0000000/serial@2000";
> 	};
> </snip>
>
> in the file arch/powerpc/boot/dts/lite5200.dts.  Recompiled, but  
> without success.  I believe it's a minor tweak I need to add, but I  
> don't have a clue what.  Unfortunately neither the wiki nor Google gave  
> answers.  Can anyone enlighten me??

Use a recent kernel version.  2.6.26 should work out of the box without
too much hassle.  Some of the older versions had problems effectively
stalling Linux very early without any output on the console.

Do not put any more effort in such an old kernel.

Cheers
  Detlev

--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu@denx.de

RE: Compile new kernel for 5200B w/ ELDK

[Rajasekaran Kaliyaperumal, Chennai]

Dear Detlev=2E=2E=2E
     Am working with PowerPc 8315rdb=2E=2E=2Eand ma using recend version of
the kernel 2=2E6=2E26=2E=2Ebut I found one problem with RTC m41t11=2E=
=2Ewhile trying
to read or set RTC which is already opened while booting itself,,,its
return the error message as resourse busy  with error no 29=2E=2E can u=
 help
me to solve this issue,,,
 With Regards
 Rajasekaran=2E=2E
 HCLT=2EIndia=2E

-----Original Message-----
From: linuxppc-embedded-bounces+rajasekaran=2Ek=3Dhcl=2Ein@ozlabs=2Eorg
[mailto:linuxppc-embedded-bounces+rajasekaran=2Ek=3Dhcl=2Ein@ozlabs=2Eorg]=
 On
Behalf Of Detlev Zundel
Sent: Monday, September 01, 2008 8:12 PM
To: linuxppc-embedded@ozlabs=2Eorg
Subject: Re: Compile new kernel for 5200B w/ ELDK

Hi Albrecht,

> please excuse a probably really dumb question about compiling a new =20
> kernel for a Freescale 5200B using the ELDK 4=2E2=2E=2E=2E
>
> I am playing with a Lite5200B eval board=2E  The software coming from =20
> Freescale, including an older kernel (2=2E6=2E16=2E11-rt18), works fine=
=2E
>
> I installed ELDK 4=2E2 on a FC box, and first compiled u-boot 1=2E3=2E4=
=2E  =20
> Wrote it to flash, and it works nicely afaict=2E
>
> Then I compiled the 2=2E6=2E24=2E2 kernel coming with the ELDK, using the=
 =20
> commands "make ARCH=3Dpowerpc CROSS_COMPILE=3Dppc_6xx- lite5200_defconfig
; =20
> make ARCH=3Dpowerpc CROSS_COMPILE=3Dppc_6xx- uImage"=2E  The kernel=
 loads, =20
> decompresses, but then there is no output any more after
"Uncompressing =20
> Kernel Image =2E=2E=2E OK"=2E  The u-boot environment contains (quoted=
 from =20
> printenv) "bootargs=3Dconsole=3DttyPSC0,115200 root=3D/dev/mtdblock0 rw =
=20
> rootfstype=3Djffs2 verbose" (and, again, the Freescale kernel is not =20
> silent)=2E
>
> I found a message which stated that I should include
>
> <snip>
>          chosen {
>                  linux,stdout-path =3D "/soc5200@f0000000/serial@2000";
> 	};
> </snip>
>
> in the file arch/powerpc/boot/dts/lite5200=2Edts=2E  Recompiled, but =20
> without success=2E  I believe it's a minor tweak I need to add, but I =20
> don't have a clue what=2E  Unfortunately neither the wiki nor Google
gave =20
> answers=2E  Can anyone enlighten me??

Use a recent kernel version=2E  2=2E6=2E26 should work out of the box=
 without
too much hassle=2E  Some of the older versions had problems effectively
stalling Linux very early without any output on the console=2E

Do not put any more effort in such an old kernel=2E

Cheers
  Detlev

--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr=2E5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu@denx=2Ede

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Re: Compile new kernel for 5200B w/ ELDK

[Detlev Zundel]

Hi Rajasekaran,

>      Am working with PowerPc 8315rdb...and ma using recend version of
> the kernel 2.6.26..but I found one problem with RTC m41t11..while trying
> to read or set RTC which is already opened while booting itself,,,its
> return the error message as resourse busy  with error no 29.. can u help
> me to solve this issue,,,

Actually, I cannot help you right now, as I do not understand the
problem.  Can you perhaps show some log files and source code exhibiting
the problem?

What exactly are you trying to do?  Did you try enabling RTC_DEBUG in
the configuration (Device Drivers -> Real Time Clock -> RTC Debug
support)?  What do the kernel messages look like?

Cheers
  Detlev

--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu@denx.de

Re: Compile new kernel for 5200B w/ ELDK

[Albrecht Dreß]

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Hi Detlev:

Am 01.09.08 16:42 schrieb(en) Detlev Zundel:
> Use a recent kernel version.  2.6.26 should work out of the box  
> without too much hassle.  Some of the older versions had problems  
> effectively stalling Linux very early without any output on the  
> console.

Thanks a lot for your hint, but unfortunately it doesn't solve my  
problem:
- downloaded 2.6.26.3 from kernel.org;
- called "make ARCH=powerpc CROSS_COMPILE=ppc_6xx-  
52xx/lite5200b_defconfig";
- called "make ARCH=powerpc CROSS_COMPILE=ppc_6xx- uImage".

However, even with "console=ttyPSC0,115200 verbose panic=1" in the  
bootargs, the kernel simply doesn't say /anything/ after decompression:

<snip>
=> bootm
## Booting kernel from Legacy Image at 01000000 ...
    Image Name:   Linux-2.6.26.3
    Created:      2008-09-02   9:11:12 UTC
    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
    Data Size:    1341904 Bytes =  1.3 MB
    Load Address: 00000000
    Entry Point:  00000000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
</snip>

Do I understand the remark in  
Documentation/powerpc/booting-without-of.txt, section "The /chosen  
node", correctly that it is *not* necessary to add it to the dts file  
as u-boot 1.3.4 should fill it in automatically?  Anyway, adding this  
section doesn't change anything...

HELP!  I'm really lost here...

Thanks, Albrecht.

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Re: Compile new kernel for 5200B w/ ELDK

[Laxmikant Rashinkar]

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I had the same problem as you.

For what its worth, here is what I added to the end of my .dts file to get my console working for a MPC8347 embedded systems

chosen {
        linux,stdout-path = &serial0;
};

Also, since I use uboot and not OF, I load the cuImage file instead of the uImage file


thanks
LK


----- Original Message ----
From: Albrecht Dreß <albrecht.dress@arcor.de>
To: linuxppc-embedded@ozlabs.org
Sent: Tuesday, September 2, 2008 10:18:15 AM
Subject: Re: Compile new kernel for 5200B w/ ELDK

Hi Detlev:

Am 01.09.08 16:42 schrieb(en) Detlev Zundel:
> Use a recent kernel version.  2.6.26 should work out of the box  
> without too much hassle.  Some of the older versions had problems  
> effectively stalling Linux very early without any output on the  
> console.

Thanks a lot for your hint, but unfortunately it doesn't solve my  
problem:
- downloaded 2.6.26.3 from kernel.org;
- called "make ARCH=powerpc CROSS_COMPILE=ppc_6xx-  
52xx/lite5200b_defconfig";
- called "make ARCH=powerpc CROSS_COMPILE=ppc_6xx- uImage".

However, even with "console=ttyPSC0,115200 verbose panic=1" in the  
bootargs, the kernel simply doesn't say /anything/ after decompression:

<snip>
=> bootm
## Booting kernel from Legacy Image at 01000000 ...
    Image Name:   Linux-2.6.26.3
    Created:      2008-09-02   9:11:12 UTC
    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
    Data Size:    1341904 Bytes =  1.3 MB
    Load Address: 00000000
    Entry Point:  00000000
    Verifying Checksum ... OK
    Uncompressing Kernel Image ... OK
</snip>

Do I understand the remark in  
Documentation/powerpc/booting-without-of.txt, section "The /chosen  
node", correctly that it is *not* necessary to add it to the dts file  
as u-boot 1.3.4 should fill it in automatically?  Anyway, adding this  
section doesn't change anything...

HELP!  I'm really lost here...

Thanks, Albrecht.



      

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Re: Compile new kernel for 5200B w/ ELDK

[Wolfgang Denk]

Dear Albrecht,

In message <1220375903l.5712l.0l@antares> you wrote:
> 
> Thanks a lot for your hint, but unfortunately it doesn't solve my  
> problem:
> - downloaded 2.6.26.3 from kernel.org;
> - called "make ARCH=powerpc CROSS_COMPILE=ppc_6xx-  
> 52xx/lite5200b_defconfig";
> - called "make ARCH=powerpc CROSS_COMPILE=ppc_6xx- uImage".

Missing step: build the device tree blob.

> However, even with "console=ttyPSC0,115200 verbose panic=1" in the  
> bootargs, the kernel simply doesn't say /anything/ after decompression:
> 
> <snip>
> => bootm
> ## Booting kernel from Legacy Image at 01000000 ...
>     Image Name:   Linux-2.6.26.3
>     Created:      2008-09-02   9:11:12 UTC
>     Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>     Data Size:    1341904 Bytes =  1.3 MB
>     Load Address: 00000000
>     Entry Point:  00000000
>     Verifying Checksum ... OK
>     Uncompressing Kernel Image ... OK
> </snip>

The "bootm" command without arguments does just start the Linux kernel
image. In this form, it does NOT pass the device tree to the Linux
kernel. You must use

	=> bootm 01000000 - <dtb_addr>

instead (after downloading the DTB to the <dtb_addr> address).

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@denx.de
A right is not what someone gives you; it's what no one can take from
you.                                                   - Ramsey Clark

Re: Compile new kernel for 5200B w/ ELDK

[Albrecht Dreß]

Hi Wolfgang:=20

> Missing step: build the device tree blob.
[snip]#
> The "bootm" command without arguments does just start the Linux kernel
> image. In this form, it does NOT pass the device tree to the Linux
> kernel. You must use
>=20
> =09=3D> bootm 01000000 - <dtb_addr>
>=20
> instead (after downloading the DTB to the <dtb_addr> address).

Bingo!  Now the kernel comes up, and I can reach out for the next stupid qu=
estions.  Reading more carefully through the wiki, I must admit that I *sho=
uld* have been able to figure that out myself (I come from ARM development =
where it wasn't necessary with u-boot, if you want to hear a stupid excuse.=
..).

Thanks again,
Albrecht.



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