* How to trun off udbg0 during bootup?
@ 2010-01-21 1:02 景文林
2010-01-21 3:56 ` SHAN Gavin
2010-01-21 15:34 ` Peter Korsgaard
0 siblings, 2 replies; 4+ messages in thread
From: 景文林 @ 2010-01-21 1:02 UTC (permalink / raw)
To: linuxppc-dev
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Hi,
I `m working on a freescale-MPC8379eRDB like board.And I want to trun off
kernel message during bootup.
I tried to modify "console = XXX" argument in uboot but it did not work(It
works on ARM). Kernel always print:
"console [udbg0] enabled" or "console handover: boot [*udbg0*] -> real
[ttyS1]"
Does anybody know how can I turn off this udbg0?
Regards,
jing wenlin
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^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: How to trun off udbg0 during bootup?
2010-01-21 1:02 How to trun off udbg0 during bootup? 景文林
@ 2010-01-21 3:56 ` SHAN Gavin
2010-01-21 6:58 ` 景文林
2010-01-21 15:34 ` Peter Korsgaard
1 sibling, 1 reply; 4+ messages in thread
From: SHAN Gavin @ 2010-01-21 3:56 UTC (permalink / raw)
To: ???, linuxppc-dev
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Hi,
I `m working on a freescale-MPC8379eRDB like board.And I want to trun off
kernel message during bootup.
I tried to modify "console = XXX" argument in uboot but it did not work(It
works on ARM). Kernel always print:
"console [udbg0] enabled" or "console handover: boot [*udbg0*] -> real
[ttyS1]"
Does anybody know how can I turn off this udbg0?
You may check arch/powerpc/kernel/udbg.c and disable registering the early
debug console driver. Then you can not see the output before the message
line like "-> real [ttyS1]"
Good luck,
Gavin
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* Re: How to trun off udbg0 during bootup?
2010-01-21 3:56 ` SHAN Gavin
@ 2010-01-21 6:58 ` 景文林
0 siblings, 0 replies; 4+ messages in thread
From: 景文林 @ 2010-01-21 6:58 UTC (permalink / raw)
To: SHAN Gavin; +Cc: linuxppc-dev
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2010/1/21 SHAN Gavin <Gavin.Shan@alcatel-lucent•com>
>
>
> Hi,
>
> I `m working on a freescale-MPC8379eRDB like board.And I want to trun off
> kernel message during bootup.
>
> I tried to modify "console = XXX" argument in uboot but it did not
> work(It
> works on ARM). Kernel always print:
>
> "console [udbg0] enabled" or "console handover: boot [*udbg0*] -> real
> [ttyS1]"
>
> Does anybody know how can I turn off this udbg0?
>
> You may check arch/powerpc/kernel/udbg.c and disable registering the early
> debug console driver. Then you can not see the output before the message
> line like "-> real [ttyS1]"
>
> Good luck,
> Gavin
>
> I assigned 1 to "static int early_console_initialized". The driver did
not register early debug console.
It`s worked.
Thank you!
Regards
jing wenlin
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* Re: How to trun off udbg0 during bootup?
2010-01-21 1:02 How to trun off udbg0 during bootup? 景文林
2010-01-21 3:56 ` SHAN Gavin
@ 2010-01-21 15:34 ` Peter Korsgaard
1 sibling, 0 replies; 4+ messages in thread
From: Peter Korsgaard @ 2010-01-21 15:34 UTC (permalink / raw)
To: 景文林; +Cc: linuxppc-dev
>>>>> "=E6=99=AF=E6=96=87=E6=9E=97" =3D=3D =E6=99=AF=E6=96=87=E6=9E=97 <we=
nlinjing@gmail•com> writes:
=E6=99=AF=E6=96=87=E6=9E=97> Hi,
=E6=99=AF=E6=96=87=E6=9E=97> =C2=A0I `m working on a freescale-MPC8379eRDB=
like board.And I want
=E6=99=AF=E6=96=87=E6=9E=97> to trun off kernel message during bootup.
=E6=99=AF=E6=96=87=E6=9E=97> =C2=A0I tried to=C2=A0 modify "console =3D XX=
X" argument in uboot but it
=E6=99=AF=E6=96=87=E6=9E=97> did not work(It works on ARM). Kernel always =
print:
=E6=99=AF=E6=96=87=E6=9E=97> "console [udbg0] enabled" =C2=A0=C2=A0 or=C2=
=A0=C2=A0 "console handover: boot
=E6=99=AF=E6=96=87=E6=9E=97> [udbg0] -> real [ttyS1]"=C2=A0
=E6=99=AF=E6=96=87=E6=9E=97> Does anybody know how can I turn off this udb=
g0?
It's currently not configurable. I sent a (not applied) patch to make it
configurable back in Dec 2008:
http://lists.ozlabs.org/pipermail/linuxppc-dev/2008-December/066461.html
You can probably still get it to apply with a bit of fuzz.
--=20
Bye, Peter Korsgaard
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2010-01-21 1:02 How to trun off udbg0 during bootup? 景文林
2010-01-21 3:56 ` SHAN Gavin
2010-01-21 6:58 ` 景文林
2010-01-21 15:34 ` Peter Korsgaard
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