how to partition a flash in linux 2.6-18 kernel

DISCUSSION zhangshigeng 2 participants 2 messages Jan 31, 2007 1 message not in the archive

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zhangshigeng

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2007-01-31 13:30 UTC #1 lore raw

Hi, everybody. We are now trying to port a 2.6-18 linux kernel to an omap_5912-based board, and we want to partition the flash on it. But it seems this should be different from partition a flash in a 2.6-10 kernel. In 2.6-10 kernel we just have to modify the /drivers/mtd/maps/omap-nor.c to give the partition information, but it doesn't work in the 2.6-18 kernel. Which file should I modify to partition the flash?
Thanks!

-----Original Message-----
From: linux-omap-open-source-bounces+zsg=dislab.nju.edu.cn@linux.omap.com [mailto:linux-omap-open-source-bounces+zsg=dislab.nju.edu.cn@linux.omap.com] On Behalf Of [email protected]
Sent: 2007年1月31日 2:00
To: [email protected]
Subject: Linux-omap-open-source Digest, Vol 33, Issue 55

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Today's Topics:

1. RE: Noise causes gpio interrupt (Arnold) (Saint-Etienne, Eric)
2. RE: Problem in linking with montavista toolchain for omap2420 (Indraneel)
3. Re: Problem in linking with montavista toolchain for omap2420 (andrzej zaborowski)

----------------------------------------------------------------------

Message: 1
Date: Tue, 30 Jan 2007 09:29:38 +0100
From: "Saint-Etienne, Eric" <[email protected]>
Subject: RE: Noise causes gpio interrupt (Arnold)
To: <[email protected]> Message-ID:

	<[email protected]>

Content-Type: text/plain; charset="us-ascii"

Quoted 5 lines

I am working on omap5912 and I am using linux 2.6.17. I am using a gpio to handle interrupts. I believe that I am having a noise interrupt which my firmware thinks is a really interrupt. Is there a way to distinguish a noise interrupt from a real interrupt?

It looks like you have a floating input. On omap2 it's possible to enable a pull-down on the pad. This is done using System Control Module (see TRM).
There may be an equivalent on omap5912.

~eric

------------------------------

Message: 2
Date: Tue, 30 Jan 2007 16:55:49 +0530
From: Indraneel <[email protected]>
Subject: RE: Problem in linking with montavista toolchain for omap2420
To: Madhava Gauranga <[email protected]>
Cc: [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain

Hello Madhava,

Quoted 5 lines · Madhava Gauranga

Hey indranil,
I reckon u have copied the toolchain already installed somewhere, instead of installing them. try installing(perhaps from the cd(s) provided) the toolchain.

It shouldn't be a case of missing libs as i am able to build and run the kernel from the same. I played around with the linker options

LDFLAGS= -nostdlib -L/opt/montavista/devkit/arm/v5t_le/target/usr/lib -L/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.1 -L/opt/montavista/devkit/arm/v5t_le/armv5tl-hardhat-linux/lib

With this i am past the previous error and the new error is

/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.1/.. /../../../armv5tl-hardhat-linux/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008074
/tmp/cc0VA6xr.o(.text+0x8): In function `main':
: undefined reference to `puts'
collect2: ld returned 1 exit status

I guess it's something to do with path but i'm not sure what exactly.

The code i'm trying to build is

#include<stdio.h>
int main (void)
{
printf("Hello World - arm linux\n");
return 0;
}

Regards,
Indraneel

Quoted 62 lines

The problem should be fixed then.
Respect,
Madhava Gauranga
Ittiam Systems | www.ittiam.com
A Red Herring Asia 100 Company, 2005
Forward Concepts' Worlds Most Preferred DSP IP Supplier, 2004, 2005
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Indraneel
Sent: Sunday, January 28, 2007 5:23 PM
To: [email protected]
Subject: Problem in linking with montavista toolchain for omap2420
Hi,
I'm trying to cross-compile a program using the montavista tool chain for arm_v5t_le architecture for the omap2420(h4 board). I get the following error when linking a simple c program:
$ arm_v5t_le-gcc -DPOSIX -DMD=2 rz.c
/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.
1/../../../../armv5tl-hardhat-linux/bin/ld: cannot find libc.so.6
collect2: ld returned 1 exit status
Surprisingly i couldn't find any file or link by the name libc.so.6 in the toolchain, although there was /opt/montavista/devkit/arm/v5t_le/target/usr/lib/libc.so
Other info
gcc
version 3.3.1 (MontaVista 3.3.1-7.0.15.0500230 2005-02-20) --with-sysroot=/opt/montavista/devkit/arm/v5t_le/target
GNU ld
version 2.14 20030612 (MontaVista 2.14-11.0.7.0500230 2005-02-20)
PATH=/opt/montavista/devkit/arm/v5t_le/bin:$PATH
I have searched for the error but couldn't find anything definitive.
Can anyone provide any clues as to what is wrong and how can i solve this linking issue?
Any pointers will be appreciated.
Regards,
Indraneel
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Linux-omap-open-source mailing list
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http://linux.omap.com/mailman/listinfo/linux-omap-open-source

Quoted 9 lines

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------------------------------

Message: 3
Date: Tue, 30 Jan 2007 15:55:25 +0100
From: "andrzej zaborowski" <[email protected]>
Subject: Re: Problem in linking with montavista toolchain for omap2420
To: Indraneel <[email protected]>
Cc: Madhava Gauranga <[email protected]>,
[email protected]
Message-ID:

	<[email protected]>

Content-Type: text/plain; charset=UTF-8; format=flowed

Hi,

Quoted 2 lines · Indraneel

LDFLAGS= -nostdlib -L/opt/montavista/devkit/arm/v5t_le/target/usr/lib -L/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.

1 -L/opt/montavista/devkit/arm/v5t_le/armv5tl-hardhat-linux/lib

Quoted 4 lines

With this i am past the previous error and the new error is

/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.1/.. /../../../armv5tl-hardhat-linux/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008074

Quoted 5 lines

/tmp/cc0VA6xr.o(.text+0x8): In function `main':
: undefined reference to `puts'
collect2: ld returned 1 exit status
I guess it's something to do with path but i'm not sure what exactly.

These function (puts, _start) are part of the C library, which you disabled by passing -nostdlib so it's understandable that the linker is not finding them.

Personally I'd just try a different toolchain. Tools like "scratchbox" or "crosstool" or Gentoo's "crossdev" make it particularly easy to compile a working toolchain. You can also build it using only bare gcc, binutils and glibc/uclibc sources.

If you have libc.so but not libc.so.6 try symlinking libc.so.6 -> libc.so (not guarranted to work but may help, maybe someone forgot to pack the link).

Regards,
Andrew

------------------------------

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End of Linux-omap-open-source Digest, Vol 33, Issue 55
******************************************************

Kipisz, Steven

2007-01-31 13:35 UTC #2 lore raw

I haven't looked at this in detail yet, but there is a file in arch/arm/mach-omap1 called board-osk.c. It looks like it has flash mappings in there. You might want to modify those.

Steve K.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of zhangshigeng
Sent: Wednesday, January 31, 2007 7:30 AM
To: [email protected]
Subject: how to partition a flash in linux 2.6-18 kernel

Send Linux-omap-open-source mailing list submissions to
[email protected]

To subscribe or unsubscribe via the World Wide Web, visit
http://linux.omap.com/mailman/listinfo/linux-omap-open-source
or, via email, send a message with subject or body 'help' to
[email protected]

You can reach the person managing the list at
[email protected]

When replying, please edit your Subject line so it is more specific than "Re: Contents of Linux-omap-open-source digest..."

Today's Topics:

----------------------------------------------------------------------

Message: 1
Date: Tue, 30 Jan 2007 09:29:38 +0100
From: "Saint-Etienne, Eric" <[email protected]>
Subject: RE: Noise causes gpio interrupt (Arnold)
To: <[email protected]> Message-ID:

	<[email protected]>

Content-Type: text/plain; charset="us-ascii"

Quoted 5 lines

I am working on omap5912 and I am using linux 2.6.17. I am using a gpio to handle interrupts. I believe that I am having a noise interrupt which my firmware thinks is a really interrupt. Is there a way to distinguish a noise interrupt from a real interrupt?

It looks like you have a floating input. On omap2 it's possible to enable a pull-down on the pad. This is done using System Control Module (see TRM).
There may be an equivalent on omap5912.

‾eric

------------------------------

Hello Madhava,

Quoted 5 lines · Madhava Gauranga

Hey indranil,
I reckon u have copied the toolchain already installed somewhere, instead of installing them. try installing(perhaps from the cd(s) provided) the toolchain.

It shouldn't be a case of missing libs as i am able to build and run the kernel from the same. I played around with the linker options

With this i am past the previous error and the new error is

I guess it's something to do with path but i'm not sure what exactly.

The code i'm trying to build is

#include<stdio.h>
int main (void)
{
printf("Hello World - arm linux¥n");
return 0;
}

Regards,
Indraneel

Quoted 62 lines

The problem should be fixed then.
Respect,
Madhava Gauranga
Ittiam Systems | www.ittiam.com
A Red Herring Asia 100 Company, 2005
Forward Concepts' Worlds Most Preferred DSP IP Supplier, 2004, 2005
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Indraneel
Sent: Sunday, January 28, 2007 5:23 PM
To: [email protected]
Subject: Problem in linking with montavista toolchain for omap2420
Hi,
I'm trying to cross-compile a program using the montavista tool chain for arm_v5t_le architecture for the omap2420(h4 board). I get the following error when linking a simple c program:
$ arm_v5t_le-gcc -DPOSIX -DMD=2 rz.c
/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.
1/../../../../armv5tl-hardhat-linux/bin/ld: cannot find libc.so.6
collect2: ld returned 1 exit status
Surprisingly i couldn't find any file or link by the name libc.so.6 in the toolchain, although there was /opt/montavista/devkit/arm/v5t_le/target/usr/lib/libc.so
Other info
gcc
version 3.3.1 (MontaVista 3.3.1-7.0.15.0500230 2005-02-20) --with-sysroot=/opt/montavista/devkit/arm/v5t_le/target
GNU ld
version 2.14 20030612 (MontaVista 2.14-11.0.7.0500230 2005-02-20)
PATH=/opt/montavista/devkit/arm/v5t_le/bin:$PATH
I have searched for the error but couldn't find anything definitive.
Can anyone provide any clues as to what is wrong and how can i solve this linking issue?
Any pointers will be appreciated.
Regards,
Indraneel
_______________________________________________
Linux-omap-open-source mailing list
[email protected]
http://linux.omap.com/mailman/listinfo/linux-omap-open-source

Quoted 9 lines

**********************************************************************
This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify [email protected].
**********************************************************************

------------------------------

	<[email protected]>

Content-Type: text/plain; charset=UTF-8; format=flowed

Hi,

Quoted 2 lines · Indraneel

LDFLAGS= -nostdlib -L/opt/montavista/devkit/arm/v5t_le/target/usr/lib -L/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.

1 -L/opt/montavista/devkit/arm/v5t_le/armv5tl-hardhat-linux/lib

Quoted 4 lines

With this i am past the previous error and the new error is

/opt/montavista/devkit/arm/v5t_le/lib/gcc-lib/armv5tl-hardhat-linux/3.3.1/.. /../../../armv5tl-hardhat-linux/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008074

Quoted 5 lines

/tmp/cc0VA6xr.o(.text+0x8): In function `main':
: undefined reference to `puts'
collect2: ld returned 1 exit status
I guess it's something to do with path but i'm not sure what exactly.

These function (puts, _start) are part of the C library, which you disabled by passing -nostdlib so it's understandable that the linker is not finding them.

If you have libc.so but not libc.so.6 try symlinking libc.so.6 -> libc.so (not guarranted to work but may help, maybe someone forgot to pack the link).

Regards,
Andrew

------------------------------

_______________________________________________
Linux-omap-open-source mailing list
[email protected]
http://linux.omap.com/mailman/listinfo/linux-omap-open-source

End of Linux-omap-open-source Digest, Vol 33, Issue 55
******************************************************

_______________________________________________
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[email protected]
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