Hi, I am a newbie to Linux but not to embedded PPC. I was hoping someone could point me to the direction here. I apologize in advance if this is kindergarten stuff.
I downloaded the MDS-8349 Linux BSP from FreeScale. I was able to burn the default prebuilt images "uboot" and "jffs2.img" to my MDS-8349 (PB) board and have uboot tftp the prebuilt "uImage" to my PB. I used "tftpboot 200000 uImage" to download and "bootm" to boot. As per included instructions, I had "setenv bootargs root=/dev/mtdblock1 rootfstype=jffs2 rw console=ttyS0,115200" in uboot, followed by a "saveenv". The prebuilt Linux (uImage) came up, no problem. As I need to include USB Host support to the PPC kernel, I used the ltib tool to reconfigure and rebuild Linux, as well as a matching jffs2 (I would think). Ltib produced vmlinux.gz.uboot and rootfs.jffs2 for me. For some reason, rootfs.jffs2 was significantly smaller than the prebuilt "jffs2.img" (2483184 bytes vs. 4325376 bytes). I'm not sure why. I then did the following: bootargs is still set to "root=/dev/mtdblock1 rootfstype=jffs2 rw console=ttyS0,115200" in uboot: Using the same (prebuilt) uboot as before: - tftpboot 400000 rootfs.jffs2 (rebuilt jffs2) - erase fe020000 fe5fffff - cp.b 400000 fe020000 25e3f0 - tftpboot 200000 vmlinux.gz.uboot (rebuilt Linux containing USB Host stuff) - bootm Linux could not boot! I got the following root FS error: [stuff deleted...] io scheduler deadline registered io scheduler cfq registered RAMDISK driver initialized: 16 RAM disks of 32768K size 1024 blocksize loop: loaded (max 8 devices) eth0: Gianfar Ethernet Controller Version 1.1, 00:04:9f:00:2d:b7 eth0: Running with NAPI disabled eth0: 64/64 RX/TX BD ring size eth1: Gianfar Ethernet Controller Version 1.1, 00:04:9f:00:2d:b8 eth1: Running with NAPI disabled eth1: 64/64 RX/TX BD ring size i2c /dev entries driver NET: Registered protocol family 2 IP: routing cache hash table of 2048 buckets, 16Kbytes TCP established hash table entries: 16384 (order: 5, 131072 bytes) TCP bind hash table entries: 16384 (order: 4, 65536 bytes) TCP: Hash tables configured (established 16384 bind 16384) NET: Registered protocol family 1 NET: Registered protocol family 17 Root-NFS: No NFS server available, giving up. VFS: Unable to mount root fs via NFS, trying floppy. VFS: Cannot open root device "mtdblock1" or unknown-block(2,0) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) <0>Rebooting in 180 seconds.. Would anybody happen to know what is going wrong? How am I supposed to know the correct "root=" boot option for a rebuilt jffs2 using LTIB, if that is my problem? Thanks in advance for any hints, Victor. The information contained in this e-mail message is PRIVATE. It may contain confidential information and may be legally privileged. It is intended for the exclusive use of the addressee(s). If you are not the intended recipient, you are hereby notified that any dissemination, distribution or reproduction of this communication is strictly prohibited. If the intended recipient(s) cannot be reached or if a transmission problem has occurred, please notify the sender immediately by return e-mail and destroy all copies of this message. Thank you. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20060424/96d11bb9/attachment.htm
