[U-Boot] LIBFDT - changing command line

[U-Boot] LIBFDT - changing command line

[Michal Simek]

Hi All,

I would like to use fdt for changing command line in DTB but
I found there is one problem if I have longer command line which contains
any spaces.
Below is my workflow.
If I understand correctly the problem is in cmd_fdt.c:fdt_parse_prop:593-603.
It will be worth to add case for supporting
fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
copy from first " to next "

Or is it there any solution which I miss for this case?

Thanks,
Michal


U-Boot-mONStR> tftp 90780000 system.dtb
Using Xilinx LL TEMAC device
TFTP from server 192.168.0.102; our IP address is 192.168.0.3
Filename 'system.dtb'.
Load address: 0x90780000
Loading: 100BASE-T/FD
#
done
Bytes transferred = 9121 (23a1 hex)
U-Boot-mONStR> fdt addr 90780000
U-Boot-mONStR> fdt h
magic:                  0xd00dfeed
totalsize:              0x23a1 (9121)
off_dt_struct:          0x38
off_dt_strings:         0x14a0
off_mem_rsvmap:         0x28
version:                17
last_comp_version:      16
boot_cpuid_phys:        0x0
size_dt_strings:        0xf01
size_dt_struct:         0x1468
number mem_rsv:         0x0

U-Boot-mONStR> fdt list /chosen
chosen {
        bootargs = "console=ttyUL0,115200 highres=on root=/dev/mtdblock0";
        linux,stdout-path = "/plb at 0/serial at 84000000";
};
U-Boot-mONStR> fdt set /chosen bootargs console=ttyUL root=/dev/mtdblock0
U-Boot-mONStR> fdt list /chosen
chosen {
        bootargs = "root=/dev/mtdblock0";
        linux,stdout-path = "/plb at 0/serial at 84000000";
};
U-Boot-mONStR>




-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian

[U-Boot] LIBFDT - changing command line

[Jerry Van Baren]

Hi Michal

Michal Simek wrote:
> Hi All,
> 
> I would like to use fdt for changing command line in DTB but
> I found there is one problem if I have longer command line which contains
> any spaces.
> Below is my workflow.
> If I understand correctly the problem is in cmd_fdt.c:fdt_parse_prop:593-603.
> It will be worth to add case for supporting
> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
> copy from first " to next "
> 
> Or is it there any solution which I miss for this case?
> 
> Thanks,
> Michal

It is somewhat ugly, but the you can use "\" to escape the spaces:
   fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0

I did this originally (IIRC) so that I wouldn't have to deal with 
handling quotes in the parsing (Are they there? Are they balanced?  What 
to do if not balanced?).  Add in a dash of lazy...

[snip]

Best regards,
gvb

[U-Boot] LIBFDT - changing command line

[Michal Simek]

Jerry Van Baren wrote:
> Hi Michal
> 
> Michal Simek wrote:
>> Hi All,
>>
>> I would like to use fdt for changing command line in DTB but
>> I found there is one problem if I have longer command line which contains
>> any spaces.
>> Below is my workflow.
>> If I understand correctly the problem is in
>> cmd_fdt.c:fdt_parse_prop:593-603.
>> It will be worth to add case for supporting
>> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
>> copy from first " to next "
>>
>> Or is it there any solution which I miss for this case?
>>
>> Thanks,
>> Michal
> 
> It is somewhat ugly, but the you can use "\" to escape the spaces:
>   fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0

Of course I tried it but simply not work.


U-Boot-mONStR> fdt list /chosen
chosen {
        bootargs = "console=ttyUL0,115200 highres=on root=/dev/mtdblock0";
        linux,stdout-path = "/plb at 0/serial at 84000000";
};
U-Boot-mONStR> fdt set /chosen bootargs console=ttyUL\ root=dev
U-Boot-mONStR> fdt list /chosen
chosen {
        bootargs = "root=dev";
        linux,stdout-path = "/plb at 0/serial at 84000000";
};
U-Boot-mONStR>

Can you tried it on your ppc?

Michal

> 
> I did this originally (IIRC) so that I wouldn't have to deal with
> handling quotes in the parsing (Are they there? Are they balanced?  What
> to do if not balanced?).  Add in a dash of lazy...


> 
> [snip]
> 
> Best regards,
> gvb


-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian

[U-Boot] LIBFDT - changing command line

[Jerry Van Baren]

Hi Michal,

Michal Simek wrote:
> Jerry Van Baren wrote:
>> Hi Michal
>>
>> Michal Simek wrote:
>>> Hi All,
>>>
>>> I would like to use fdt for changing command line in DTB but
>>> I found there is one problem if I have longer command line which contains
>>> any spaces.
>>> Below is my workflow.
>>> If I understand correctly the problem is in
>>> cmd_fdt.c:fdt_parse_prop:593-603.
>>> It will be worth to add case for supporting
>>> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
>>> copy from first " to next "
>>>
>>> Or is it there any solution which I miss for this case?
>>>
>>> Thanks,
>>> Michal
>> It is somewhat ugly, but the you can use "\" to escape the spaces:
>>   fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
> 
> Of course I tried it but simply not work.
> 
> 
> U-Boot-mONStR> fdt list /chosen
> chosen {
>         bootargs = "console=ttyUL0,115200 highres=on root=/dev/mtdblock0";
>         linux,stdout-path = "/plb at 0/serial at 84000000";
> };
> U-Boot-mONStR> fdt set /chosen bootargs console=ttyUL\ root=dev
> U-Boot-mONStR> fdt list /chosen
> chosen {
>         bootargs = "root=dev";
>         linux,stdout-path = "/plb at 0/serial at 84000000";
> };
> U-Boot-mONStR>
> 
> Can you tried it on your ppc?
> 
> Michal

It is working for me.  Are you running the "hush" shell or the old 
scripting interpreter?

=> fdt print /chosen
chosen {
         linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
};
=> fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
=> fdt print /chosen
chosen {
         bootargs = "console=ttyUL root=/dev/mtdblock0";
         linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
};
=> fdt set /chosen bootargs console=ttyUL\ root=dev
=> fdt print /chosen
chosen {
         bootargs = "console=ttyUL root=dev";
         linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
};

Best regards,
gvb

[U-Boot] LIBFDT - changing command line

[Wolfgang Denk]

Dear Jerry Van Baren,

In message <4A837625.6010507@gmail.com> you wrote:
> 
> => fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0

Why not simply

	=> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"

?

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 at denx.de
A man is not complete until he is married -- then he is finished.

[U-Boot] LIBFDT - changing command line

[Michal Simek]

Jerry Van Baren wrote:
> Hi Michal,
> 
> Michal Simek wrote:
>> Jerry Van Baren wrote:
>>> Hi Michal
>>>
>>> Michal Simek wrote:
>>>> Hi All,
>>>>
>>>> I would like to use fdt for changing command line in DTB but
>>>> I found there is one problem if I have longer command line which
>>>> contains
>>>> any spaces.
>>>> Below is my workflow.
>>>> If I understand correctly the problem is in
>>>> cmd_fdt.c:fdt_parse_prop:593-603.
>>>> It will be worth to add case for supporting
>>>> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
>>>> copy from first " to next "
>>>>
>>>> Or is it there any solution which I miss for this case?
>>>>
>>>> Thanks,
>>>> Michal
>>> It is somewhat ugly, but the you can use "\" to escape the spaces:
>>>   fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
>>
>> Of course I tried it but simply not work.
>>
>>
>> U-Boot-mONStR> fdt list /chosen
>> chosen {
>>         bootargs = "console=ttyUL0,115200 highres=on
>> root=/dev/mtdblock0";
>>         linux,stdout-path = "/plb at 0/serial at 84000000";
>> };
>> U-Boot-mONStR> fdt set /chosen bootargs console=ttyUL\ root=dev
>> U-Boot-mONStR> fdt list /chosen
>> chosen {
>>         bootargs = "root=dev";
>>         linux,stdout-path = "/plb at 0/serial at 84000000";
>> };
>> U-Boot-mONStR>
>>
>> Can you tried it on your ppc?
>>
>> Michal
> 
> It is working for me.  Are you running the "hush" shell or the old
> scripting interpreter?

old scripting. With hush works + 11kB.

Thanks,
Michal

> 
> => fdt print /chosen
> chosen {
>         linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
> };
> => fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
> => fdt print /chosen
> chosen {
>         bootargs = "console=ttyUL root=/dev/mtdblock0";
>         linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
> };
> => fdt set /chosen bootargs console=ttyUL\ root=dev
> => fdt print /chosen
> chosen {
>         bootargs = "console=ttyUL root=dev";
>         linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
> };
> 
> Best regards,
> gvb


-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian

[U-Boot] LIBFDT - changing command line

[Wolfgang Denk]

Dear Michal Simek,

In message <4A83DB8E.1030707@monstr.eu> you wrote:
>
...
> > It is working for me.  Are you running the "hush" shell or the old
> > scripting interpreter?
> 
> old scripting. With hush works + 11kB.

Actually this should make no difference.

Are you absolutely sure it does? If so, can you please prvide exact
details?

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 at denx.de
Today is the yesterday you worried about tomorrow.

[U-Boot] LIBFDT - changing command line

[Jerry Van Baren]

Wolfgang Denk wrote:
> Dear Jerry Van Baren,
> 
> In message <4A837625.6010507@gmail.com> you wrote:
>> => fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
> 
> Why not simply
> 
> 	=> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
> 
> ?
> 
> Best regards,
> 
> Wolfgang Denk

Hi Wolfgang,

I did not try that last night.  I should have because it should work, at 
least for hush.

Best regards,
gvb

[U-Boot] LIBFDT - changing command line

[Wolfgang Denk]

Dear Jerry Van Baren,

In message <4A8405FF.1060305@ge.com> you wrote:
>
> >> => fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
> > 
> > Why not simply
> > 	=> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
> > ?
...
> I did not try that last night.  I should have because it should work, at 
> least for hush.

Not only for hush. Ther eshould be no difference in this respect
between the hush shell and the simple command line parser.

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 at denx.de
You may call me by my name, Wirth, or by my value, Worth.
- Nicklaus Wirth