* [U-Boot-Users] netconsole doesn't work if $(serverip) is assigned to ncip instead of hardcoded value
@ 2007-03-27 8:24 Igor Marnat
2007-03-27 8:40 ` Wolfgang Denk
0 siblings, 1 reply; 5+ messages in thread
From: Igor Marnat @ 2007-03-27 8:24 UTC (permalink / raw)
To: u-boot
Hello List!
When I assign 10.0.0.55 to ncip, netconsole functions ok. But when I
assign 10.0.0.55 to serverip variable and ncip is equal to
$(serverip), netconsole doesn't work. It still shows prompt to serial
console after command "run nc" is issued (nc=setenv stdout nc;setenv
stdin nc).
u-boot is of 1.1.6 version.
Am I doing something wrong or it functions as designed?
Best regards,
Igor Marnat
mailto:marny at rambler.ru
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot-Users] netconsole doesn't work if $(serverip) is assigned to ncip instead of hardcoded value
2007-03-27 8:24 [U-Boot-Users] netconsole doesn't work if $(serverip) is assigned to ncip instead of hardcoded value Igor Marnat
@ 2007-03-27 8:40 ` Wolfgang Denk
2007-03-27 11:15 ` Igor Marnat
0 siblings, 1 reply; 5+ messages in thread
From: Wolfgang Denk @ 2007-03-27 8:40 UTC (permalink / raw)
To: u-boot
In message <985507812.20070327122451@rambler.ru> you wrote:
>
> When I assign 10.0.0.55 to ncip, netconsole functions ok. But when I
> assign 10.0.0.55 to serverip variable and ncip is equal to
> $(serverip), netconsole doesn't work. It still shows prompt to serial
> console after command "run nc" is issued (nc=setenv stdout nc;setenv
> stdin nc).
You must be doing something wrong. "ncip" and "serverip" are
completely unrelated.
Please provide a full log of your actions including your environment
settings.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office: Kirchenstr. 5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"We don't have to protect the environment -- the Second Coming is at
hand." - James Watt
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot-Users] netconsole doesn't work if $(serverip) is assigned to ncip instead of hardcoded value
2007-03-27 8:40 ` Wolfgang Denk
@ 2007-03-27 11:15 ` Igor Marnat
2007-03-27 14:58 ` Wolfgang Denk
0 siblings, 1 reply; 5+ messages in thread
From: Igor Marnat @ 2007-03-27 11:15 UTC (permalink / raw)
To: u-boot
Hello Wolfgang,
WD> You must be doing something wrong. "ncip" and "serverip" are
WD> completely unrelated.
Sure. I just thought that it's possible to use environment variables
to assign values to all other variables. That is to say, if assignment
addip=setenv bootargs $(bootargs) ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname):$(netdev):off panic=1
works ok (it uses $(serverip)), why can't I use
ncip=$(serverip)?
See below the full environment. The only difference between two scenarious
is that it works if ncip=10.0.0.55 and it doesn't if ncip=$(serverip).
=> printenv baudrate=115200
loads_echo=1
eth1addr=00:50:c2:1e:af:fd
netdev=eth0
ethaddr=00:50:c2:1e:af:f1
kernel_flash_addr=ffe04000
kernel_flash_end=fffbffff
kernel_flash_space=$(kernel_flash_addr) $(kernel_flash_end)
poff=protect off $(kernel_flash_addr) $(kernel_flash_end)
erase_kernel=era $(kernel_flash_addr) $(kernel_flash_end)
upd_kernel=tftpboot; run poff; run erase_kernel; cp.b $(fileaddr) $(kernel_flash_addr) $(filesize)
flash_nfs=run nfsargs addip addcons;bootm $(kernel_flash_addr)
nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) rootpath=$(rootpath)
addip=setenv bootargs $(bootargs) ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname):$(netdev):off panic=1
addcons=setenv bootargs $(bootargs) console=ttyS0,$(baudrate)
nfs26=/home/igor/tz-64/ppc/tz_64_nfs
rootpath=/home/igor/tz-64/ppc/tz_64_nfs
addmem=setenv bootargs $(bootargs) mem=16M
filesize=ebe75
fileaddr=200000
netmask=255.255.255.0
serverip=10.0.0.55
bootargs=root=/dev/nfs rw nfsroot=90.0.0.55:/home/igor/tz-64/ppc/tz_64_nfs rootpath=/home/igor/tz-64/ppc/tz_64_nfs
ip=90.0.0.137:90.0.0.55::255.255.255.0::eth0:off panic=1
net_nfs=tftp 200000 $(bootfile);run nfsargs addip addcons addmem;bootm
mtd_args=setenv bootargs root=/dev/mtdblock0 rw rootfstype=jffs2
net_mtd=tftp 200000 $(bootfile);run mtd_args addip addcons addmem;bootm
ipaddr=10.0.0.239
bootfilesaved=uImage26
bootcmdsaved=run net_mtd
bootfile=uImage26nandconsole
nc=setenv stdout nc;setenv stdin nc
ncip=10.0.0.55
ethact=ppc_4xx_eth0
com_eth_go=run echo_sleep; run nc; run echo_sleep; run net_nfs
bootcmd=run com_eth_go
echo_sleep=echo "I am sleeping, press CTRL-C to stop";sleep 4;
bootdelay=2
stdin=serial
stdout=serial
stderr=serial
--
Best regards,
Igor Marnat
mailto:marny at rambler.ru
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot-Users] netconsole doesn't work if $(serverip) is assigned to ncip instead of hardcoded value
2007-03-27 11:15 ` Igor Marnat
@ 2007-03-27 14:58 ` Wolfgang Denk
2007-03-28 5:03 ` Igor Marnat
0 siblings, 1 reply; 5+ messages in thread
From: Wolfgang Denk @ 2007-03-27 14:58 UTC (permalink / raw)
To: u-boot
In message <15015754812.20070327151529@rambler.ru> you wrote:
>
> Sure. I just thought that it's possible to use environment variables
> to assign values to all other variables. That is to say, if assignment
>
> addip=setenv bootargs $(bootargs) ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname):$(netdev):off panic=1
I'm not sure what this represents. Your input? Then this is wrong.
The output of a printenv command? Then it looks ok, except that the
use of pares for variable reference is deprecated and may become
illegal soon. Please use '${...}' instead.
> ncip=$(serverip)?
What is the supposed function of this?
> See below the full environment. The only difference between two scenarious
> is that it works if ncip=10.0.0.55 and it doesn't if ncip=$(serverip).
Of course this cannot work. The string "$(serverip)" is no valid IP
address.
U-Boot substitues variables when it parses an U-Boot command.
If you define something like
=> setenv addip 'setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}: ...'
then you have to *run* this 'addip' definition (i. e.. you execute a
command, "run"); this in turn will execute the "setenv" command, and
when dong this the command arguments are parsed and variables
substituted.
If you define
=> setenv ncip ${serverip}
you will set the "ncip" variable to the current value of your serverip
variable. If you want to delay this substitution, you could for
example write:
=> setenv set_ncip 'setenv ncip ${serverip}'
and later, at the appropriate place, execute it as "run set_ncip".
If you however write
=> setenv ncip '${serverip}'
then you defined the variable "ncip" to hold the literal string
"${serverip}" which will probably not do what you want.
Hope this helps - I don't really understand why you expected it to
work differently.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office: Kirchenstr. 5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Living on Earth may be expensive, but it includes an annual free trip
around the Sun.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot-Users] netconsole doesn't work if $(serverip) is assigned to ncip instead of hardcoded value
2007-03-27 14:58 ` Wolfgang Denk
@ 2007-03-28 5:03 ` Igor Marnat
0 siblings, 0 replies; 5+ messages in thread
From: Igor Marnat @ 2007-03-28 5:03 UTC (permalink / raw)
To: u-boot
Hello Wolfgang,
WD> If you define
WD> => setenv ncip ${serverip}
WD> you will set the "ncip" variable to the current value of your serverip
WD> variable. If you want to delay this substitution, you could for
You are definitely right. I should have use 'setenv ncip ${serverip}'.
Thank you for your reply,
Best regards,
Igor Marnat
mailto:marny at rambler.ru
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2007-03-28 5:03 UTC | newest]
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2007-03-27 8:24 [U-Boot-Users] netconsole doesn't work if $(serverip) is assigned to ncip instead of hardcoded value Igor Marnat
2007-03-27 8:40 ` Wolfgang Denk
2007-03-27 11:15 ` Igor Marnat
2007-03-27 14:58 ` Wolfgang Denk
2007-03-28 5:03 ` Igor Marnat
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