kernel image in SDRAM but not booting?

Hi scott:

First

> How did you do this? You must use the bootm command to correctly boot a kernel.

I use bootm command to boot a kernel:

bootm BASE_ADDR_SDRAM

>But the kernel stop

What does this mean? Please provide some details -- it is difficult for us to guess what you

are observing ;-)

when the code run to the function kernel( ), in the nios2-terminal :

the last line :

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

cursor wink

> see the file nios_linux.c I don't know what is the function kernel()

The _variable_ "kernel" is a function pointer ... it points to the entry point of the kernel. When

you create a u-boot kernel image with mkimage, you specify this address with the -e option.

I use the printf("%08x\n",hdr->ih_ep);

the hdr->ih_ep is 0x000000001 (entry_point should be 0x1000000 (BASE_ADDR_SDRAM ) )

>> I use go command but error below:

>

> *****warning unimplemented trap @ 0x100015c

Please provide more details ... what address did you specify? ... what is at the address

that you specify? What are you trying to do?

I think the method is wrong .

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.

Best Regards

jigdo