when i use a 2.6.13kernel, it can go though finally mount rootfs and run busybox but i try to use 2.6.22.12(without devfs) instead ,it comes those words VIVI version 0.1.4 (root@vmwarelinux) (gcc version 2.95.3 20010315 (release)) #0.1.4 Mon May 14 15:46:54 CST 2007 MMU table base address = 0x33DFC000 Succeed memory mapping. DIVN_UPLL0 MPLLVal [M:7fh,P:2h,S:1h] CLKDIVN:5h +-----------------------------------------------------+ | FriendlyARM SBC2440/QQ2440 USB Downloader ver1.2 | +-----------------------------------------------------+ USB: IN_ENDPOINT:1 OUT_ENDPOINT:3 FORMAT: +++ NOTE: Power off/on or press the reset button for 1 sec in order to get a valid USB device address. NAND device: Manufacture ID: 0xec, Chip ID: 0x76 (Samsung K9D1208V0M) Found saved vivi parameters. Press Return to start the LINUX/Wince now, any other key for vivi Copy linux kernel from 0x00050000 to 0x30008000, size = 0x00200000 ... done zImage magic = 0x016f2818 Setup linux parameters at 0x30000100 linux command line is: "noinitrd root=31:2 init=/linuxrc console=ttySAC0" MACH_TYPE = 782 NOW, Booting Linux...... Uncompressing Linux.................................................................. done, booting the kernel. Linux version 2.6.22.12 (elzo@elzo-laptop) (gcc version 4.2.1 (CodeSourcery Sourcery G++ Lite 2007q3-51)) #1 PREEMPT Thu Nov 22 21:14:25 CST 2007 CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177 Machine: SMDK2440 ATAG_INITRD is deprecated; please update your bootloader. Memory policy: ECC disabled, Data cache writeback CPU S3C2440A (id 0x32440001) S3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHz S3C24XX Clocks, (c) 2004 Simtec Electronics CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on CPU0: D VIVT write-back cache CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets CPU0: D cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets Built 1 zonelists. Total pages: 16256 Kernel command line: noinitrd root=31:2 init=/linuxrc console=ttySAC0 irq: clearing pending ext status 00000200 irq: clearing subpending status 00000002 PID hash table entries: 256 (order: 8, 1024 bytes) timer tcon=00000000, tcnt a4ca, tcfg 00000200,00000000, usec 00001e57 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: 62744KB available (1812K code, 193K data, 88K init) Mount-cache hash table entries: 512 CPU: Testing write buffer coherency: ok S3C2410 Power Management, (c) 2004 Simtec Electronics S3C2440: Initialising architecture S3C2440: IRQ Support S3C2440: Clock Support, DVS off S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics DMA channel 0 at c4800000, irq 33 DMA channel 1 at c4800040, irq 34 DMA channel 2 at c4800080, irq 35 DMA channel 3 at c48000c0, irq 36 usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb NetWinder Floating Point Emulator V0.97 (double precision) fuse init (API version 7.8) yaffs Nov 22 2007 21:09:59 Installing. io scheduler noop registered io scheduler anticipatory registered (default) io scheduler deadline registered io scheduler cfq registered s3c2410-lcd s3c2410-lcd: invalid bpp 16 Console: switching to colour frame buffer device 30x40 fb0: s3c2410fb frame buffer device lp: driver loaded but no devices found ppdev: user-space parallel port driver S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled s3c2440-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2440 s3c2440-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2440 s3c2440-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2440 RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize loop: module loaded S3C24XX NAND Driver, (c) 2004 Simtec Electronics s3c2440-nand s3c2440-nand: Tacls=1, 9ns Twrph0=4 39ns, Twrph1=1 9ns lxr,2440 NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bit) NAND_ECC_NONE selected by board driver. This is not recommended !! Scanning device for bad blocks Creating 3 MTD partitions on "NAND 64MiB 3,3V 8-bit": 0x00000000-0x00030000 : "bootloader" mtd: Giving out device 0 to bootloader 0x00050000-0x00250000 : "kernel" mtd: Giving out device 1 to kernel 0x00250000-0x03ffc000 : "root" mtd: Giving out device 2 to root lxr,initialised ok s3c2410-ohci s3c2410-ohci: S3C24XX OHCI s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1 s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000 usb usb1: configuration #1 chosen from 1 choice hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected mice: PS/2 mouse device common for all mice S3C24XX RTC, (c) 2004,2006 Simtec Electronics s3c2440-i2c s3c2440-i2c: slave address 0x10 s3c2440-i2c s3c2440-i2c: bus frequency set to 98 KHz s3c2440-i2c s3c2440-i2c: i2c-0: S3C I2C adapter drivers/rtc/hctosys.c: unable to open rtc device (rtc0) yaffs: dev is 32505858 name is "mtdblock2" yaffs: passed flags "" yaffs_read_super: Using yaffs1 yaffs_read_super: block size 4096 yaffs: Attempting MTD mount on 31.2, "mtdblock2" erase c013cab0 read c013ce4c write c013c8a0 readoob c013cd88 writeoob c013c950 block_isbad c013ccc4 block_markbad c013cd14 writesize 512 oobsize 16 erasesize 16384 size 64667648 yaffs: yaffs_GutsInitialise() yaffs_Scan starts intstartblk 1 intendblk 3947... Block scanning block 1 state 3 seq 0 Block empty Block scanning block 2 state 2 seq 0 Block scanning block 3 state 2 seq 0 Block scanning block 4 state 2 seq 0 Block scanning block 5 state 2 seq 0 ....... Block scanning block 826 state 2 seq 0 Block scanning block 827 state 2 seq 0 Block scanning block 828 state 3 seq 0 Block empty Block scanning block 829 state 3 seq 0 Block empty ....... Block scanning block 3947 state 3 seq 0 Block empty yaffs_Scan ends yaffs: yaffs_GutsInitialise() done. yaffs_read_super: guts initialised OK yaffs_read_super: got root inode yaffs_read_super: d_alloc_root done yaffs_read_super: done VFS: Mounted root (yaffs filesystem). Freeing init memory: 88K Warning: unable to open an initial console. Failed to execute /linuxrc. Attempting defaults... Kernel panic - not syncing: No init found. Try passing init= option to kernel. how can I mount the rootfs? I configed sysfs and all the options under "pseudo file system" configed "do own ecc" and make driver/mtd/nand/s3c2410.c: ecc.mode=nand_ecc_none also mknod console zero null but what's the problem?