Thanks. I have compiled yaffs into kernel. It can work with cramfs(root fs partition) and yaffs(usr partition). But error found when use yaffs as root fs : I use mkyaffsimage to get the rootyaffs.img. linux command line is: "noinitrd root=/dev/mtdblock/3 init=/linuxrc console=tty"MACH_TYPE = 193 NOW, Booting Linux...... Uncompressing Linux.............................................................Linux version 2.6.11 (root@localhost.localdomain) (gcc version 3.4.1) #35 Tue M5CPU: ARM920Tid(wb) [41129200] revision 0 (ARMv4T) 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 Machine: SMDK2410 ATAG_INITRD is deprecated; please update your bootloader. Memory policy: ECC disabled, Data cache writeback CPU S3C2410 (id 0x32410000) S3C2410: core 200.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz S3C2410 Clock control, (c) 2004 Simtec Electronics Built 1 zonelists Kernel command line: noinitrd root=/dev/mtdblock/3 init=/linuxrc console=ttySAC0irq: clearing pending ext status 00000300 irq: clearing subpending status 00000003 irq: clearing subpending status 00000002 PID hash table entries: 512 (order: 9, 8192 bytes) timer tcon=00000000, tcnt a2c1, tcfg 00000200,00000000, usec 00001eb8 Console: colour dummy device 80x30 Dentry cache hash table entries: 16384 (order: 4, 65536 bytes) Inode-cache hash table entries: 8192 (order: 3, 32768 bytes) Memory: 64MB = 64MB total Memory: 62848KB available (1573K code, 347K data, 80K init) Mount-cache hash table entries: 512 (order: 0, 4096 bytes) CPU: Testing write buffer coherency: ok NET: Registered protocol family 16 S3C2410: Initialising architecture NetWinder Floating Point Emulator V0.97 (double precision) VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) devfs: 2004-01-31 Richard Gooch (rgooch@atnf.csiro.au) devfs: devfs_debug: 0x0 devfs: boot_options: 0x1 Initializing Cryptographic API Real Time Clock Driver v1.12 S3C2410 RTC, (c) 2004 Simtec Electronics S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2410 s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2410 s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2410 io scheduler noop registered Cirrus Logic CS8900A driver for Linux (Modified for SMDK2410) eth0: CS8900A rev E at 0xe0000300 irq=53, no eeprom , addr: 08: 0:3E:26:0A:5B S3C2410 NAND Driver, (c) 2004 Simtec Electronics s3c2410-nand: mapped registers at c4a00000 s3c2410-nand: timing: Tacls 10ns, Twrph0 40ns, Twrph1 10ns NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bi)NAND_ECC_NONE selected by board driver. This is not recommended !! Scanning device for bad blocks Bad eraseblock 307 at 0x004cc000 >>>>>>>>>> bad block???? !!!!!!!!!!!! Bad eraseblock 308 at 0x004d0000 Bad eraseblock 309 at 0x004d4000 Creating 5 MTD partitions on "NAND 64MiB 3,3V 8-bit": 0x00000000-0x00020000 : "vivi" mtd: Giving out device 0 to vivi 0x00020000-0x00030000 : "param" mtd: Giving out device 1 to param 0x00030000-0x00200000 : "kernel" mtd: Giving out device 2 to kernel 0x00200000-0x00500000 : "root" mtd: Giving out device 3 to root 0x00400000-0x03f00000 : "usr" mtd: Giving out device 4 to usr mice: PS/2 mouse device common for all mice NET: Registered protocol family 2 IP: routing cache hash table of 512 buckets, 4Kbytes TCP established hash table entries: 4096 (order: 3, 32768 bytes) TCP bind hash table entries: 4096 (order: 2, 16384 bytes) TCP: Hash tables configured (established 4096 bind 4096) NET: Registered protocol family 1 Root-NFS: No NFS server available, giving up. VFS: Unable to mount root fs via NFS, trying floppy. Reading data from NAND FLASH without ECC is not recommended yaffs: dev is 32505859 name is "(unavailable)" VFS: Mounted root (yaffs filesystem). mount_devfs_fs(): unable to mount devfs, err: -2 Freeing init memory: 80K Warning: unable to open an initial console. Kernel panic - not syncing: No init found. Try passing init= option to kernel. So I want to erase the nand first. Using NFS, then, [root@localhost root_china]# file mkyaffs.arm mkyaffs.arm: ELF 32-bit LSB executable, ARM, version 1 (ARM), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), not stripped [root@localhost root_china]# file mkyaffsimage mkyaffsimage: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), not stripped How can I successfully use yaffs as root fs. On 5/9/05, Charles Manning wrote: > On Monday 09 May 2005 01:39, jeanwelly wrote: > > I want to usr yaffs on 2.6.11 + s3c2410, K9F1208 nandflash. > > I can't access the CVS now, can you send me the yaffs.tar.gz file that > > can be used as root fs on 2.6.11. > > You can fetch an automatic tar file from > http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/cvs_root.tar.gz?tarball=1 > > -- CHarles > > -- jeanwelly Email: jeanwelly@gmail.com China