From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joseph G. Boike Date: Mon, 23 Jun 2008 11:48:42 -0500 Subject: [Buildroot] can t find root fs kernel panic In-Reply-To: <485C66DD.2070304@ripnet.com> References: <485BC6AC.1090301@acsatlanta.com> <485C66DD.2070304@ripnet.com> Message-ID: <485FD3EA.5060003@acsatlanta.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Mike Sander wrote: > Joseph G. Boike wrote: >> I'm hoping someone can help me with this. >> I'm using this morning buildroot (How do I determine the rev #?) >> Built for an Atmel at91sam9260 processor and eval board. >> I've tried using the ext2, ext2.gz and jffs root filesystems with the >> same results. >> Below is an abridged capture from the kernel during boot. >> I've tried google, but everything I saw was related to the bootloader >> pointing to the wrong disk. >> My u-boot invocation is: >> bootp 21500000 linux.gz; bootp 20410000 rootfs.ext2.gz; bootm 21500000 >> Is the Kernel command line correct? >> (I've tried 2 different boards, so I don't think it's h/w.) >> >> Regards, >> Joe >> >> Starting kernel ... >> >> Uncompressing >> Linux.................................................................................................... >> >> Linux version 2.6.24.4 (JoeB at elab14_linux.localdomain) (gcc version >> 4.2.1) #2 Fri Jun 20 10:07:40 EDT 2008 >> CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177 >> Machine: Atmel AT91SAM9260-EK >> Memory policy: ECC disabled, Data cache writeback >> Clocks: CPU 199 MHz, master 99 MHz, main 18.432 MHz >> CPU0: D VIVT write-back cache >> CPU0: I cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets >> CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets >> Built 1 zonelists in Zone order, mobility grouping on. Total pages: >> 16256 >> Kernel command line: mem=64M console=ttyS0,115200 >> initrd=0x20410000,3145728 root=/dev/ram0 rw >> >> Memory: 64MB = 64MB total >> Memory: 58056KB available (3352K code, 238K data, 140K init) >> >> checking if image is initramfs...it isn't (bad gzip magic numbers); >> looks like an initrd >> Freeing initrd memory: 3072K >> NetWinder Floating Point Emulator V0.97 (double precision) >> DLM (built Jun 20 2008 09:40:47) installed >> JFS: nTxBlock = 478, nTxLock = 3824 >> >> RAMDISK driver initialized: 16 RAM disks of 15360K size 1024 blocksize >> >> RAMDISK: Couldn't find valid RAM disk image starting at 0. >> List of all partitions: >> No filesystem could mount root, tried: ext2 cramfs msdos vfat jfs >> Kernel panic - not syncing: VFS: Unable to mount root fs on >> unknown-block(1,0) >> >> >> > Joseph, > > I have just grabbed todays snapshot & built for an at91sam9260ek > [you're not specific on the exact board you are using]. Using all > the default I can boot and mount ext2 (i'm sure others will work). > the ext2 is a good one to start with as the kernel has support for > this in the default configuration. > > I'm using u-boot. I put the ext2 image > (binaries/uclibc/rootfs.arm-20080620.ext2) at 0x21100000. I put the > uImage at 0x21400000. I used the default kernel command line set up > for this target (which has initrd at 21100000). Its the same as > yours, but slightly different address for the initrd. Are you > loading the correct file system image? Are you putting at the correct > address corresponding to the kernel command line (either default or > supplied by you)? > > Here is my u-boot stuff & boot log. Maybe this might help > > U-Boot> tftp 21100000 rootfs.arm-20080620.ext2 > TFTP from server 192.168.1.2; our IP address is 192.168.1.3 > Filename 'rootfs.arm-20080620.ext2'. > Load address: 0x21100000 > Loading: > ################################################################# > ################################################################# > ################################################################# > ####T > ############################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ################################################################# > ####### > done > Bytes transferred = 4026368 (3d7000 hex) > U-Boot> tftp 21400000 uImage.buildroot-20080620 > TFTP from server 192.168.1.2; our IP address is 192.168.1.3 > Filename 'uImage.buildroot-20080620'. > Load address: 0x21400000 > Loading: > ################################################################# > ################################################################# > ################################################################# > ###### > done > Bytes transferred = 1025408 (fa580 hex) > U-Boot> bootm > ## Booting image at 21400000 ... > Image Name: Linux-2.6.22.1 > Image Type: ARM Linux Kernel Image (uncompressed) > Data Size: 1025344 Bytes = 1001.3 kB > Load Address: 20008000 > Entry Point: 20008000 > Verifying Checksum ... OK > OK > > Starting kernel ... > > Uncompressing > Linux.................................................................... > done, booting the kernel. > Linux version 2.6.22.1 (mike at himalia) (gcc version 4.2.4) #1 Fri Jun > 20 16:53:37 EDT 2008 > CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177 > Machine: Atmel AT91SAM9260-EK > Memory policy: ECC disabled, Data cache writeback > Clocks: CPU 198 MHz, master 99 MHz, main 18.432 MHz > CPU0: D VIVT write-back cache > CPU0: I cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets > CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets > Built 1 zonelists. Total pages: 16256 > Kernel command line: mem=64M console=ttyS0,115200 > initrd=0x21100000,3145728 root=/dev/ram0 rw > AT91: 96 gpio irqs in 3 banks > PID hash table entries: 256 (order: 8, 1024 bytes) > Console: colour dummy device 80x30 > Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) > Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) > Memory: 64MB = 64MB total > Memory: 59648KB available (1856K code, 188K data, 100K init) > Mount-cache hash table entries: 512 > CPU: Testing write buffer coherency: ok > NET: Registered protocol family 16 > SCSI subsystem initialized > usbcore: registered new interface driver usbfs > usbcore: registered new interface driver hub > usbcore: registered new device driver usb > NET: Registered protocol family 2 > IP route cache hash table entries: 1024 (order: 0, 4096 bytes) > TCP established hash table entries: 2048 (order: 2, 16384 bytes) > TCP bind hash table entries: 2048 (order: 1, 8192 bytes) > TCP: Hash tables configured (established 2048 bind 2048) > TCP reno registered > checking if image is initramfs...it isn't (bad gzip magic numbers); > looks like an initrd > Freeing initrd memory: 3072K > NetWinder Floating Point Emulator V0.97 (double precision) > io scheduler noop registered > io scheduler anticipatory registered (default) > atmel_usart.0: ttyS0 at MMIO 0xfefff200 (irq = 1) is a ATMEL_SERIAL > atmel_usart.1: ttyS1 at MMIO 0xfffb0000 (irq = 6) is a ATMEL_SERIAL > atmel_usart.2: ttyS2 at MMIO 0xfffb4000 (irq = 7) is a ATMEL_SERIAL > RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize > usbmon: debugfs is not available > at91_ohci at91_ohci: AT91 OHCI > at91_ohci at91_ohci: new USB bus registered, assigned bus number 1 > at91_ohci at91_ohci: irq 20, io mem 0x00500000 > usb usb1: configuration #1 chosen from 1 choice > hub 1-0:1.0: USB hub found > hub 1-0:1.0: 2 ports detected > Initializing USB Mass Storage driver... > usbcore: registered new interface driver usb-storage > USB Mass Storage support registered. > udc: at91_udc version 3 May 2006 > mice: PS/2 mouse device common for all mice > TCP cubic registered > NET: Registered protocol family 1 > NET: Registered protocol family 17 > RAMDISK: ext2 filesystem found at block 0 > RAMDISK: Loading 3932KiB [1 disk] into ram disk... done. > VFS: Mounted root (ext2 filesystem). > Freeing init memory: 100K > Initializing random number generator... done. > Starting network... > ip: RTNETLINK answers: File exists > > > > Welcome to the Erik's uClibc development environment. > uclibc login: root > > Mike Mike, Thanks, The kernel command line came from "make at91sam9260dfc_defconfig", but it was the problem. When my kernel was expanded @ 20008000 by u-boot it overran the start of the root filesystem @ 20410000. Additionally, my root fs was bigger than the ramdisk size (that's the 2nd parameter in the initrd command (3072K or 3145728)). So now that I've fixed those and have u-boot w/ the proper addresses, I can boot linux. Joe