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

jameshq@liverpool.ac.uk jameshq@liverpool.ac.uk
Sat May 24 16:01:00 GMT 2003


Thanks a lot gary.
but As I metioned in the previous post:

How can I check whether the flash memory is ready for JFFS2 if setting
needed to be done by RedBoot?

(Step1) when I do a "board reset":
Copyright (C) 2000, 2001, 2002, Red Hat, Inc.

RAM: 0x00000000-0x02000000, 0x00002000-0x01f21000 available
FLASH: 0x40000000 - 0x40800000, 128 blocks of 0x00010000 bytes each.

(Step2) and "fis list":
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

(Step6) load and run the program
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).

Do you think there is any problem with the above setting? BTW What do
you mean: "You'll need to build an appropriate JFFS2 image and 
then install it into FLASH (using RedBoot) before you start the 
application." ? Even when I just to run the JFFS2 test program
fileio1? If I just want to create a file and store it to flash memory
I still need to create the JFFS2 image and store this to flash first?
If so does that mean all the flash file (JFFS2) are all created and
stored to that JFFS2 image(act as a container)? Is this right? so
could you please give me a little detail about how I can achieve this?
Thank you very much indeed.




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:
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-- 
Gary D. Thomas <gary.thomas@mind.be>

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