From: Jaap-Jan Boor <jjboor@aimsys.nl>
To: j.rakesh@gdatech.co.in
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Unable to mount jffs2 file system
Date: Mon, 16 Jun 2003 15:52:35 +0200 [thread overview]
Message-ID: <3EEDCBA3.6B9728A2@aimsys.nl> (raw)
In-Reply-To: xpm1c2kre0rvtkh.160620031905@gda-server
Rakesh,
in init/main.c you can add to root_dev_names[] your root
device (e.g. "mtdblock2" 0x1f02).
You have to specify somehow to use this device then, as kernel
parameter. I use root_string in arch/ppc/[mbxboot][simple]/misc.c:
char *root_string = "root=/dev/mtdblock2 rw init=/linuxrc";
Jaap-Jan
Rakesh jagota wrote:
>
> Hi all,
>
> I am working on custom design board based on IBM405 PPC. I am using OpenBios
> code and Linux -2.4.17 version from montavista. I have compiled the kernel
> with JFFS2 support.
>
> In linux/drivers/mtd/maps/redwood.c files, we have modified the partitions as
> per our board
>
> Our board is having 4MB flash and 32MB sdram.
>
> #define WINDOW_ADDR 0xFFC00000
> #define WINDOW_SIZE 0x00400000
>
> we filled the redwood_flash_partitions structure as below
>
> name: "Redwood kernel", //"/dev/mtd0"
> offset: 0x00010000,
> size: 0x00110000
>
> name: "Redwood OpenBIOS Vital Product Data", //"/dev/mtd1"
>
> offset: 0x00000000,
> size: 0x00010000,
> mask_flags: MTD_WRITEABLE
>
> name: "Redwood filesystem", //"/dev/mtd2"
> offset: 0x00110000,
> size: 0x002D0000
>
> name: "Redwood OpenBIOS", //"/dev/mtd3"
> offset: 0x003E0000,
> size: 0x00020000,
> mask_flags: MTD_WRITEABLE /* force read-only */
>
> i have created a jff2 image and flashed in the mtd2 block. But while booting
> i am getting kernel panic
> ===============================================
>
> kernel panic: I have no root and I want to scream
>
> ===============================================
>
> how to tell the kernel that the root filesystems is in mtdblock2
>
> Thanks & Regards,
>
> rakesh
>
--
J.G.J. Boor Anton Philipsweg 1
Software Engineer 1223 KZ Hilversum
AimSys bv tel. +31 35 689 1941
Postbus 2194, 1200 CD Hilversum mailto:jjboor@aimsys.nl
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2003-06-16 13:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-16 13:45 Unable to mount jffs2 file system Rakesh jagota
2003-06-16 13:52 ` Jaap-Jan Boor [this message]
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