Dear Wolfgang Denk: I'm using U-Boot-2009-08 now. And I have a problem booting my linux image from nand flash. I can boot from my norflash using NFS, and mount my Nand flash, nand flash works file with fstype yaffs2. I run command nboot 800000 0 0 (device 0, offset 0, into memory 0x800000), then it prints out my image information and then says that it reads failed. The prints are: ----------------------------------------------------------------- Loading from NAND 1GiB 3,3V 8-bit, offset 0x0 Image Name: Linux-2.6.22.sac.rd Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1045865 Bytes = 1021.4 kB Load Address: 00000000 Entry Point: 00000000 NAND read from offset ffffffff failed 0 ** Read error ----------------------------------------------------------------- This seems that all the blocks are bad blocks, so I try "nand bad", there are no bad blocks in my nand flash as it says. Then, I look into the source, and find something strange. In function "nand_load_image" in /common/cmd_nand.c, I print out the parameters of function "nand_load_image" gives "nand_read_skip_bad" and function "nand_read_skip_bad" gets, they are different. ----------------------------------------------------------------- nand = 0xfffdab8, offset = 0x0, &cnt = 0xfba1768. addr = 0x800000 in nand_load_image. nand = 0xfffdab8, offset = 0x0, length = 0x0, buffer = 0xfba1768 in nand_read_skip_bad. ----------------------------------------------------------------- This seems the stack is wrong? I don't know what to do next now.