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RE: Is there any RedBoot related setting needed for usingJFFS2 to access Flash memory by ecos RAM application? Thanks a lot.


On Fri, 2003-05-23 at 09:01, QiangHuang wrote:
> now I unlock the flash  by using the RedBoot, but I am getting another error
> message, any idea? Thanks a lot. (I even tried the following steps:
> 1. fis init -f
> 2. fis unlock -f 0x40030000 -l 0x00700000
> 3. load and run the ecos ram apps by redboot(without resetting the board)
> 
> 
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000008:
> 0xf018
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000000c:
> 0xf018
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000010:
> 0xf018
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000018:
> 0xf018
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000001c:
> 0xf018
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000024:
> 0x0414
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000028:
> 0x0438
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000002c:
> 0x0464
>  instead
> <5>jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000030:
> 0x0480
>  instead
> <5>Further such events for this erase block will not be printed
> <5>Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
> <5>empty_blocks 15, bad_blocks 0, c->nr_blocks 16
> <FAIL>: mount() returned -1 I/O error
> <FAIL>: chdir() returned -1 No such entity
> 
> What could be wrong?

Are you sure that eCos is set up to use the correct area of FLASH for
the JFFS2 image (this is configurable).

> BTW does the magic bitmask has been set into flash memory before the
> application runs? do I need to initialise anything?

Yes, of course.  You'll need to build an appropriate JFFS2 image and 
then install it into FLASH (using RedBoot) before you start the 
application.

> 
> Thank you very much.
> 
> 
> -----Original Message-----
> From: ecos-discuss-owner@sources.redhat.com
> [mailto:ecos-discuss-owner@sources.redhat.com]On Behalf Of Andrew Lunn
> Sent: 23 May 2003 12:26
> To: QiangHuang
> Cc: Ecos-Discuss
> Subject: Re: [ECOS] Is there any RedBoot related setting needed for using
> JFFS2 to access Flash memory by ecos RAM application? Thanks a lot.
> 
> 
> On Fri, May 23, 2003 at 12:03:08PM +0100, QiangHuang wrote:
> > Hi all:
> >    Can somebody kindly tell me is there any relation ship between the
> > RedBoot and the JFFS2? I want to the ecos application to access the JFFS2,
> > do I need to setup something by RedBoot(e.g. unlock, or init?) before the
> > ecos application can use JFFS2? (The situation is: I want to build ecos
> RAM
> > application and loaded by RedBoot, in ecos ram application I use JFFS2 to
> > access the flash memory-store/read) Thanks a lot.
> 
> The only thing you need to do is make sure they don't both try to use
> the same blocks.
> 
> > RedBoot> fis list
> > Name              FLASH addr  Mem addr    Length      Entry point
> > RedBoot           0x40000000  0x40000000  0x00020000  0x00000000
> > RedBoot config    0x407E0000  0x407E0000  0x00001000  0x00000000
> > FIS directory     0x407F0000  0x407F0000  0x00010000  0x00000000
> 
> > eCOS configuration setting is:
> > FLASH device drivers --> Instantiate in I/O block device API --> Name of
> > flash device 1 block device ("dev/flash1") --> Static configuration
> > selected --> Start offset from flash base (0x00100000); Length
> (0x00100000).
> 
> so the jffs is at 0x40100000 to 0x40200000. So, you have no problem
> here.
> 
> > But when I run the fileio1 test program I got the following errors:
> >
> > 1. When the program runs to "mount()"
> > <4>Write clean marker to block at 0x000e0000 failed: 1
> > <4>Write clean marker to block at 0x000d0000 failed: 1
> > <4>Write clean marker to block at 0x000c0000 failed: 1
> > <4>Write clean marker to block at 0x000b0000 failed: 1
> 
> My guess is the blocks of flash are locked. I quickly looked to the
> flash block device and it does nothing about unlocking them. You
> probably want to write a little program that uses the flash function
> flash_unloc() to unlock the blocks. Otherwise your jffs can only read
> and not write.
> 
>     Andrew
> 
> --
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
-- 
Gary D. Thomas <gary.thomas@mind.be>


-- 
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