Dear all, I am porting Android in mini2440. I Have successfully obtained zImage. I am trying to boot system from NAND. Using dnw2 i have 1. Formated NAND (x) 2. Download vivi (v) 3. Download Linux kernel (k) - zImage 4. Download root_yaffs (y) While booting the system follwing kernel panic occurs, Copy linux kernel from 0x00060000 to 0x30008000, size = 0x00200000 ... done zImage magic = 0x016f2818 Setup linux parameters at 0x30000100 linux command line is: "noinitrd root=/dev/mtdblock2 init=/linuxrc console=ttySAC0" MACH_TYPE = 1999 NOW, Booting Linux...... Uncompressing Linux........................................................................... .................................................... done, booting the kernel. Linux version 2.6.29-rc3-gbd87a7a-dirty (root@prem-laptop) (gcc version 4.4.1 (Sourcery G++ Lite 2009q3-67) ) #1 PREEMPT Sun Jul 25 18:29:02 IST 2010 CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177 CPU: VIVT data cache, VIVT instruction cache Machine: Friendly-ARM MINI2440 Development Board ATAG_INITRD is deprecated; please update your bootloader. Memory policy: ECC disabled, Data cache writeback CPU S3C2440A (id 0x32440001) S3C24XX Clocks, (c) 2004 Simtec Electronics S3C244X: core 405.000 MHz, memory 101.250 MHz, peripheral 50.625 MHz CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256 Kernel command line: noinitrd root=/dev/mtdblock2 init=/linuxrc console=ttySAC0 irq: clearing subpending status 00000003 irq: clearing subpending status 00000002 PID hash table entries: 256 (order: 8, 1024 bytes) Console: colour dummy device 80x30 console [ttySAC0] enabled 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: 60840KB available (3688K code, 235K data, 108K init) SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 Calibrating delay loop... 201.93 BogoMIPS (lpj=504832) Mount-cache hash table entries: 512 CPU: Testing write buffer coherency: ok net_namespace: 520 bytes NET: Registered protocol family 16 S3C2440: Initialising architecture S3C2440: IRQ Support S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics DMA channel 0 at c4808000, irq 33 DMA channel 1 at c4808040, irq 34 DMA channel 2 at c4808080, irq 35 DMA channel 3 at c48080c0, irq 36 S3C244X: Clock Support, DVS off bio: create slab <bio-0> at 0 SCSI subsystem initialized cfg80211: Using static regulatory domain info cfg80211: Regulatory domain: US \0x09(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) \0x09(2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm) \0x09(5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) \0x09(5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) \0x09(5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) \0x09(5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) \0x09(5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm) cfg80211: Calling CRDA for country: US 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 NET: Registered protocol family 1 NetWinder Floating Point Emulator V0.97 (double precision) ashmem: initialized NTFS driver 2.1.29 [Flags: R/W DEBUG]. yaffs Jul 25 2010 18:26:35 Installing. msgmni has been set to 118 alg: No test for stdrng (krng) io scheduler noop registered (default) Console: switching to colour frame buffer device 30x20 fb0: s3c2410fb frame buffer device 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 brd: module loaded loop: module loaded nbd: registered device at major 43 dm9000 Ethernet Driver, V1.31 eth0 (dm9000): not using net_device_ops yet eth0: dm9000e at c480c300,c4810304 IRQ 51 MAC: 08:90:90:90:90:90 (platform data) Linux video capture interface: v2.00 Driver 'sd' needs updating - please use bus_type methods S3C24XX NAND Driver, (c) 2004 Simtec Electronics s3c2440-nand s3c2440-nand: Tacls=1, 9ns Twrph0=4 39ns, Twrph1=2 19ns NAND device: Manufacturer ID: 0xec, Chip ID: 0xf1 (Samsung NAND 128MiB 3,3V 8-bit) Bad block table not found for chip 0 Bad block table not found for chip 0 Scanning device for bad blocks Bad eraseblock 333 at 0x0000029a0000 Bad eraseblock 505 at 0x000003f20000 cmdlinepart partition parsing not available mice: PS/2 mouse device common for all mice s3c2440-ts s3c2440-ts: Starting s3c2440-ts s3c2440-ts: Successfully loaded input: s3c2410 TouchScreen as /class/input/input0 S3C24XX RTC, (c) 2004,2006 Simtec Electronics s3c2410-rtc s3c2410-rtc: rtc disabled, re-enabling s3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0 i2c /dev entries driver 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 s3c2440-sdi s3c2440-sdi: host detect has no irq available mapped channel 0 to 0 s3c2440-sdi s3c2440-sdi: powered down. s3c2440-sdi s3c2440-sdi: initialisation done. s3c2440-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz). s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz). s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz). s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz). TCP cubic registered NET: Registered protocol family 17 s3c2440-sdi s3c2440-sdi: powered down. RPC: Registered udp transport module. RPC: Registered tcp transport module. s3c2410-rtc s3c2410-rtc: setting system clock to 2010-07-27 05:57:42 UTC (1280210262) Root-NFS: No NFS server available, giving up. VFS: Unable to mount root fs via NFS, trying floppy. VFS: Cannot open root device "mtdblock2" or unknown-block(2,0) Please append a correct "root=" boot option; here are the available partitions: 1f00 131072 mtdblock0 (driver?) Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) --------------------------------------------------------------------------- The bootloader must take the initial ram space from NAND FLASH...Instead the root is set to mtdblocks which will is used to boot from SD Card.. I know this error but, I dont know how to set root manually to boot from NAND.. Guide me please...