[U-Boot] load file to memory in standalone program

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Scott A

18 May 2013 18 May '13

5:14 p.m.

Hi,I am attempting to read a set of files from the fat file system into a location in memory.This is easy using the command interface using something likefatload mmc 0:1 0x48000000 file.txt However i want to do this in a standalone program. Is there a function call available to do this in a standalone program.if so could someone give an example. Note: i tried do_fat_fsload function call however compiling threw undefined reference. If this is the correct method maybe i am just using it wrong. Thanks Scott

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Henrik Nordström

19 May 19 May

1:35 a.m.

lör 2013-05-18 klockan 15:14 +0000 skrev Scott A:

...

Hi,I am attempting to read a set of files from the fat file system into a location in memory.This is easy using the command interface using something likefatload mmc 0:1 0x48000000 file.txt However i want to do this in a standalone program. Is there a function call available to do this in a standalone program.if so could someone give an example.

The standalone API do not include filesystem operations, only raw device operations.

I think it would be a great addition to add generic filesystem operations to the standalone API. The fs_read() and fs_write() functions should be possible to export via the standalone API as-is, but should probably be wrapped a little bit to select which filesystem/partition to operate on, similar to do_load() but without the u-boot env magics or variable arguments.

any specification of filesystem type in the API (if needed) should be done in string form to ensure a long term stable API I think.

Regards Henrik

Wolfgang Denk

21 May 21 May

2:33 p.m.

Dear Henrik,

In message 1368920138.23379.14.camel@localhost you wrote:

...

I think it would be a great addition to add generic filesystem operations to the standalone API. The fs_read() and fs_write() functions should be possible to export via the standalone API as-is, but should probably be wrapped a little bit to select which filesystem/partition to operate on, similar to do_load() but without the u-boot env magics or variable arguments.

Technically you may be right. The reason why we intentionally maintain a very lean interface to standalone programs is that we allow such applications to be distributed even under non-GPL licenses.

If you need more fancy features, just add your code to U-Boot and distribute it under GPL.

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 In a business, marketroids, salespukes, and lawyers have different goals from those who actually do work and produce something. Usually, is is the former who triumph over the latter, due to the simple rule that those who print the money make the rules. -- Tom Christiansen in 5jdcls$b04$2@csnews.cs.colorado.edu

Wolfgang Denk

2:29 p.m.

Dear Scott A,

In message COL126-W15B9EDAC5841A2C364A531B6AD0@phx.gbl you wrote:

...

Hi,I am attempting to read a set of files from the fat file system into a location in memory.This is easy using the command interface using somethin g likefatload mmc 0:1 0x48000000 file.txt However i want to do this in a standalone program. Is there a function call available to do this in a standalone program.if so could someone give an e xample. Note: i tried do_fat_fsload function call however compiling threw undefined reference. If this is the correct method maybe i am just using it wrong.

No, such functionality is not available in standalone programs.

Best regards,

Wolfgang Denk

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Henrik Nordström
Scott A
Wolfgang Denk