RE: Linux on 8260 using ELDK..Help?!?

Flavio,

What do your file permissions look like on /dev/ttyS0?  Do you have read and
write access enabled?

Pete

P.S.  I am also using the linux 2.4.18 kernel on the MPC8260ADS board, so I
might be able to help on further issues...

--- Flavio Pereira <fpereira@azisa.com> wrote:

Hi Wolfgang

Firstly let me say thanks for your response.

quoted

Did you fix the IMMR mapping in PPCBoot? The  CFG_DEFAULT_IMMR  defi-
nition  will  NOT  work with LInux; see the Linux memory map require-
ments - You _must_ map the IMMR at 0xF0000000 or above.

Yes I have fixed to IMMR mappings in PPCBoot to correspond to 0xF0000000

quoted

Are you sure this was done well?

Well _no_ I'm not sure this was done well but I can tell you exactly
what I have done. For uart.c I've completely removed SMC1 and SMC2 from
serial_state rs_table and rs_brg_map[]. If I don't remove this my serial
port does not come up at all initially. For tty_io.c I simply to do not
call rs_8xx_init because it kills my serial port, i.e. if I let it this
code execute there is no more output on my serial terminal.

quoted

Did you run the ELDK_MAKEDEV and ELDK_FIXPERM scripts as documented?

I've run ELDK_MAKEDEV, so the dev/console file does exist and I've also
run ELDK_FIXOWNER. I'm guessing that FIXOWNER = FIXPERM.

Also in my var\log\messages I get the following...so init is trying to
execute:

Dec 31 19:00:13 192 kernel: Warning: unable to open an initial console.
Dec 31 19:00:13 192 /sbin/mingetty[133]: /dev/ttyS0: Operation not
permitted
Dec 31 19:00:06 192 rc.sysinit: Mounting proc filesystem:  succeeded
Dec 31 19:00:06 192 sysctl: net.ipv4.ip_forward = 0
Dec 31 19:00:06 192 sysctl: net.ipv4.conf.all.rp_filter = 1
Dec 31 19:00:07 192 sysctl: error: 'net.ipv4.ip_always_defrag' is an
unknown key
Dec 31 19:00:07 192 sysctl: error: 'kernel.sysrq' is an unknown key
Dec 31 19:00:07 192 rc.sysinit: Configuring kernel parameters:
succeeded
Dec 31 19:00:07 192 date: Wed Dec 31 19:00:06 EST 1969
Dec 31 19:00:07 192 rc.sysinit: Setting clock : Wed Dec 31 19:00:06 EST
1969 succeeded
Dec 31 19:00:07 192 swapon: swapon: cannot open /etc/fstab: No such file
or directory
Dec 31 19:00:07 192 rc.sysinit: Activating swap partitions:  failed
Dec 31 19:00:07 192 rc.sysinit: Setting hostname 192.168.1.246:
succeeded
Dec 31 19:00:10 192 rc.sysinit: Checking filesystems succeeded
Dec 31 19:00:10 192 fsck: Checking all file systems.
Dec 31 19:00:10 192 rc.sysinit: Mounting local filesystems:  failed
Dec 31 19:00:10 192 fsck: WARNING: couldn't open /etc/fstab: No such
file or directory
Dec 31 19:00:10 192 mount: can't create lock file /etc/mtab~62:
Permission denied (use -n flag to override)
Dec 31 19:00:11 192 rc.sysinit: Enabling swap space:  succeeded
Dec 31 19:00:11 192 init: can't open(/etc/ioctl.save, O_WRONLY):
Permission denied
Dec 31 19:00:13 192 /sbin/mingetty[134]: /dev/ttyS0: Operation not
permitted
Dec 31 19:00:11 192 init: Entering runlevel: 3
Dec 31 19:00:14 192 /sbin/mingetty[135]: /dev/ttyS0: Operation not
permitted
Dec 31 19:00:14 192 /sbin/mingetty[136]: /dev/ttyS0: Operation not
permitted
Dec 31 19:00:14 192 /sbin/mingetty[137]: /dev/ttyS0: Operation not
permitted
Dec 31 19:00:14 192 /sbin/mingetty[138]: /dev/ttyS0: Operation not
permitted
Dec 31 19:00:14 192 /sbin/mingetty[139]: /dev/ttyS0: Operation not
permitted
Dec 31 19:00:14 192 /sbin/mingetty[140]: /dev/ttyS0: Operation not
permitted

Regards,
Flavio

-----Original Message-----
From: Wolfgang Denk [mailto:wd@denx.de]
Sent: Wednesday, September 04, 2002 3:41 PM
To: Flavio Pereira
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Linux on 8260 using ELDK..Help?!?

Dear flavio,

in message [ref] you
wrote:

quoted

I'm a _newbie_ to Linux and am busy porting Linux to a MPC8260ADS
board. PPCBoot is working fine and the Linux kernel seems to boot up
okay up and till the point where it begins to load init, it then
crashes. The trace is shown below. I've also tried forcing sh and

Did you fix the IMMR mapping in PPCBoot? The  CFG_DEFAULT_IMMR  defi-
nition  will  NOT  work with LInux; see the Linux memory map require-
ments - You _must_ map the IMMR at 0xF0000000 or above.

quoted

bash as the start-up but these also fail with similar errors. I'm
using the binaries provided by the ELDK development package. Also my
changes to the base kernel code (2.4.4) are minimal and are limited
to uart.c (force SCC1 as serial port) and tty_io.c (don't call
rs_8xx_init). Can anyone please point me in the right direction...?

Are you sure this was done well?

quoted

If the information above is not sufficient please let me know what
more I could provide. Something tries to restart the system and then
it crashes on trying to reboot. Someone please tell me what I should
be looking at?

...

quoted

Freeing unused kernel memory: 52k init

Looks good so far.

quoted

Warning: unable to open an initial console.

Did you run the ELDK_MAKEDEV and ELDK_FIXPERM scripts as documented?

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
In C we had to code our own bugs, in C++ we can inherit them.

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