Does it mean that at any given time, only one type of flash can be seen by the kernel?? If so, how it is supposed to work in production?
Another question: DVEVM Technical Reference says "Do NOT change this jumper with the power on." Should I ignore this? Kim -----Original Message----- From: Singh, Brijesh [mailto:[EMAIL PROTECTED] Sent: April 3, 2007 4:18 PM To: Kim Klaiman; [email protected] Subject: RE: JFFS2 use on default DVEVM NOR flash What's your jumper setting on CS2 select? If your jumper is set for NOR flash then kernel will not see the NAND flash (not detect). In your case, 1. set the jumper to NOR flash 2. copy kernel/rootfs (using "cp.b" command) in DDR, 3. change jumper to NAND flash 4. execute bootm command to boot the board. -Brijesh -----Original Message----- From: Kim Klaiman [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 03, 2007 3:09 PM To: Singh, Brijesh; [email protected] Subject: JFFS2 use on default DVEVM NOR flash Thanks! Actually I already did the part of the kernel and rootfs on NOR flash. What am I missing for JFFS2? Why I don't see any MTD messages during the reboot and there are no /dev/mtd* devices? -----Original Message----- From: Singh, Brijesh [mailto:[EMAIL PROTECTED] Sent: April 3, 2007 4:05 PM To: Kim Klaiman; [email protected] Subject: RE: JFFS2 use on default DVEVM NOR flash Yes, you can do that. Please refer spraah2.pdf on ti.com. The doc will help you to build/copy kernel and rootfs in NOR flash. -Brijesh ________________________________________ From: Kim Klaiman [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 03, 2007 2:59 PM To: Singh, Brijesh Subject: RE: JFFS2 use on default DVEVM NOR flash Thanks Brijesh! Is it possible to put the kernel image and the root file system on NOR flash and create JFFS2 for data on NAND flash? The kernel will boot from NOR flash, uncompress to RAM, run from RAM and save data to JFFS2 on NAND flash - does it make sense? Kim ________________________________________ From: Singh, Brijesh [mailto:[EMAIL PROTECTED] Sent: April 3, 2007 3:51 PM To: Kim Klaiman Subject: RE: JFFS2 use on default DVEVM NOR flash Kim, Are you using DVEVM/DVSDK kernel? If so, then LSP does not support NOR flash. IIRC, then there is patch on GIT tree to support NOR flash. You can try to apply the patch and see if it works. -Brijesh ________________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] p.com] On Behalf Of Kim Klaiman Sent: Tuesday, April 03, 2007 2:37 PM To: [email protected] Subject: JFFS2 use on default DVEVM NOR flash Hello all, MontaVista User Guide specifies the following steps for using JFFS2: * MTD * Under Filesystems, enable the following options: * Journaling Flash File System v2 (JFFS2) support * JFFS debugging verbosity (0 = quiet, 3 = noisy) * JFFS2 Support for NAND chips (Only if your target supports NAND flash.) Note: The devices /dev/mtd0 and /dev/mtdblock0 are required for JFFS2 to work. These devices should be included automatically with the target LSPs that support the flash driver. Ensure that these devices are present. During boot-up of the kernel, the MTD driver prints whether the flash has been found or not. Also, after boot-up, the command cat /proc/mtd can be used to see the details of the MTD device and confirm that the driver is active. After enabling those options, I don't see any MTD messages during the reboot and there are no /dev/mtd* devices. I do see the message "JFFS2 version 2.2. (NAND) (C) 2001-2003 Red Hat, Inc.", but I'm using NOR flash currently. What am I missing? Thanks, Kim Klaiman Senior Embedded Software Engineer Bioscrypt Inc. _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
