Dear All, I am dealing with kernel 2.6.23 (by Grant) on virtex-4 (ml403 like evaluation board with ppc405 built-in processor). The kernel boots fine by means of u-boot 1.2.0 when using nfs mounted root files system.
My Board has 32MB of RAM memory (0x00000000 - 0x1ffffff) Right now I wanted to combine the linux kernel and the root file system in one file in order to store it in the Flash memory. I was able to build sucessfuly the kernel image which conatins the rootfile system. Unfortunately during booting the rootfile system is not recognized. My linux image with built-in the root fs has 6.7 MB. The uncompressed rootfile system has 17 MB. Steps which I have done are as following: On my embedded system I use u-boot 1.2.0 1. I load via tftp the the uImageWithRamFs tftp 0x1500000 uImageWithRamFs 2. Next I execute the image bootm 0x1500000 The output is as following: ## Booting image at 01500000 ... Image Name: Linux-2.6.23-rc2 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6983377 Bytes = 6.7 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK [ 0.000000] Linux version 2.6.23-rc2 ([EMAIL PROTECTED]) (gcc version 4.0.2) #13 Thu Sep 20 13:49:26 CEST 2007 [ 0.000000] Xilinx ML403 Reference System (Virtex-4 FX) [ 0.000000] Zone PFN ranges: [ 0.000000] DMA 0 -> 8192 [ 0.000000] Normal 8192 -> 8192 [ 0.000000] Movable zone start PFN for each node [ 0.000000] early_node_map[1] active PFN ranges [ 0.000000] 0: 0 -> 8192 [ 0.000000] Built 1 zonelists in Zone order. Total pages: 8128 [ 0.000000] Kernel command line: console=ttyUL0 root=/dev/ram rw ip=129.118.144.82:129.118.144.113:129.118.144.1:255.255.255.0:virtex4-mirek:eth0:off panic=1 [ 0.000000] Xilinx INTC #0 at 0x41200000 mapped to 0xFDFFF000 [ 0.000000] PID hash table entries: 128 (order: 7, 512 bytes) [ 0.000289] Console: colour dummy device 80x25 [ 0.000615] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes) [ 0.001181] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes) [ 0.009923] Memory: 24304k available (1656k kernel code, 544k data, 5968k init, 0k highmem) [ 0.097097] Mount-cache hash table entries: 512 [ 0.103761] NET: Registered protocol family 16 [ 0.144382] NET: Registered protocol family 2 [ 0.180548] IP route cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.181582] TCP established hash table entries: 1024 (order: 1, 8192 bytes) [ 0.181903] TCP bind hash table entries: 1024 (order: 0, 4096 bytes) [ 0.182122] TCP: Hash tables configured (established 1024 bind 1024) [ 0.182200] TCP reno registered [ 7.835360] io scheduler noop registered [ 7.835446] io scheduler anticipatory registered (default) [ 7.835524] io scheduler deadline registered [ 7.835801] io scheduler cfq registered [ 8.529280] uartlite.0: ttyUL0 at MMIO 0x40600000 (irq = 2) is a uartlite [ 8.530949] console [ttyUL0] enabled [ 10.549186] RAMDISK driver initialized: 2 RAM disks of 16384K size 1024 blocksize [ 10.648123] loop: module loaded [ 10.688195] tun: Universal TUN/TAP device driver, 1.6 [ 10.749201] tun: (C) 1999-2004 Max Krasnyansky <[EMAIL PROTECTED]> [ 10.825474] XTemac: using FIFO direct interrupt driven mode. [ 10.893905] eth%d: XTemac: PHY detected at address 3. [ 10.956872] eth0: Xilinx TEMAC #0 at 0x81200000 mapped to 0xC3020000, irq=0 [ 11.040788] eth0: XTemac id 1.0f, block id 5, type 8 [ 11.101628] mice: PS/2 mouse device common for all mice [ 11.164837] TCP cubic registered [ 11.203869] NET: Registered protocol family 1 [ 11.256350] NET: Registered protocol family 17 [ 11.813548] eth0: XTemac: Options: 0xb8f2 [ 15.835154] eth0: XTemac: We renegotiated the speed to: 100 [ 15.901906] eth0: XTemac: speed set to 100Mb/s [ 16.985905] IP-Config: Complete: [ 17.022598] device=eth0, addr=129.118.144.82, mask=255.255.255.0, gw=129.118.144.1, [ 17.119958] host=virtex4-mirek, domain=, nis-domain=(none), [ 17.192276] bootserver=129.118.144.113, rootserver=129.118.144.113, rootpath= [ 17.292444] List of all partitions: [ 17.334388] No filesystem could mount root, tried: ext2 msdos vfat [ 17.409805] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) [ 17.509374] Rebooting in 1 seconds..<NULL> [ 18.563180] Oops: Exception in kernel mode, sig: 4 [#1] [ 18.625695] NIP: c07e0000 LR: c085fe70 CTR: c085fee0 [ 18.685072] REGS: c085fdb0 TRAP: 2000000 Not tainted (2.6.23-rc2) [ 18.761190] MSR: 00000f13 <DR> CR: c01ca858 XER: c00e8c80 [ 18.827869] TASK = c085cba0[1] 'swapper' THREAD: c085e000 [ 18.890350] GPR00: c085fdd0 c000437c 00000000 00008000 c01c37e0 000003e5 c01c3858 00008000 My .config file which is used to build the linux kernel has following settings which refer to the initramfs: CONFIG_GENERIC_NVRAM=y CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y CONFIG_INITRAMFS_SOURCE="smallRootFs.cpio" CONFIG_INITRAMFS_ROOT_UID=0 CONFIG_INITRAMFS_ROOT_GID=0 CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_COUNT=2 CONFIG_BLK_DEV_RAM_SIZE=16384 CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024 # CONFIG_NVRAM is not set CONFIG_RAMFS=y I appreciate any hint on that why the root fs is not recognized Best Regards Mirek -- View this message in context: http://www.nabble.com/Kernel-2.6-and-INITRAMFS-in-one-file-booting-problem-on-ml403-tf4487411.html#a12796771 Sent from the linuxppc-embedded mailing list archive at Nabble.com. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
