Can't boot with zImage.img but vmlinux

[Altera_Forum]

Hi 

 I have problems with booting uClinux (NOMMU) on DE0 Board.   I can't successfully boot uClinux kernel with zImage.   But I can boot uClinux kernel with vmlinux.   My u-boot version is u-boot-2011-06. The build of the kernel from nios2-linux-20110603 seems to work    When I download the "zImage" to my SDRAM and try to use the bootm command to boot uClinux. But after a while only show the below message and then nothing happens     --- Quote Start ---   ==> fatload mmc_spi 0 01C00000 zimage.img reading zimage.img 1457659 bytes read   ==> bootm 01C00000# # Booting kernel from Legacy Image at 01c00000 ... Image Name: linux- 2.6 Image Type: NIOS II Linux Kernel Image (uncompressed) Data Size: 1457595 Bytes = 1.4 MiB Load Address: 01804000 Entry Point: 01804000 Verifying Checksum ... OK Loading Kernel Image ... OK OK       --- Quote End ---       this is my borad information   --- Quote Start ---   ==> bdinfo mem start = 0x01800000 mem size = 0x00800000 flash start = 0x82400000 flash size = 0x00400000 flash offset= 0x00000019 ethaddr = (not set) ip_addr = 0.0.0.0 baudrate = 1 bps   --- Quote End ---     I create zImage.img by mkimage tool. The following information is setting of zImage.image     --- Quote Start ---   mkimage -n 'linux- 2.6' -A nios2 -O linux -T kernel -C none -a 0x01804000 -e 0x01804000 -d zImage zImage.img   --- Quote End ---     PS. The success of booting kernel that I use "go" command + vmlinux.bin rather than "bootm" command + zImage.img       Thank you for your help!!!!!!!!!!!!!!!!!!!!!!!