kernel image in SDRAM but not booting?

Hi jigdo,

> I use bootm command to boot a kernel:

> bootm BASE_ADDR_SDRAM

...

> Uncompressing Kernel Image ...........OK

...

> Besides ,I use the nios2-flash-programmer to download the u-boot and kernel.

...

> in the mkimage,the load_address and the entry_address both

> are BASE_ADDR_SDRAM.

I _think_ I understand ... but I'm not sure. Based on your comments, you should be doing the

following:

-Use the flash programmer to download your compressed u-boot kernel image to flash.

This is the binary file you create using mkimage.

-From the u-boot command line, you should specify the address (in flash) of the image file.

This tells u-boot to read the image from flash, uncompress it and write the uncompressed data

to the "load address". U-boot will then disable interrupts, and jump to the "entry point address".

When you try to uncompress a u-boot image to the same address as the u-boot image,

the uncompressed data will overwrite the compressed data ... and bad things will happen ;-)

Regards,

--Scott