booting uclinux from u-boot

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originally posted by ankur@May 29 2006, 04:24 AM

hi all

i am trying to boot uclinux from u-boot on 2s60 board.

i have one doubt regarding exception vector table entry point address.

what i have observed in uclinux (head.s) that exception vector table entry point jump instruction sits at base addr of ram + 0x20 offset, same information i have given in hardware configuration file in sopc builder (.sof).

and same location is used for u-boot's execption vector table (specified in the u-boot config file).

my sdram start address is 0x0100_0000.

so exception vector table sits at 0x0100_0020 in both the cases of u-boot and uclinux.

the kernel image has entry_address at 0x0100_0000.

now if i download kernel image through u-boot, then exception table gets overwritten by kernel image and u-boot hangs.

please share your experience with how you deal with this issue. i mean when you boot kernel from u-boot then which address is given for exception vector table. or it's ok to use same addr there is some other issue ?

thanks

ankur

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hi all,

I can download my kernel image file in the sdram. There were some misunderstanding with CFG_NIOS_CPU_VEC_BASE and CFG_EXCEPTION_ADDR.

Now both I made equal to 0x0100_0020.

But still I can&#39;t boot my kernel.

I am downloading uncompressed kernel through tftpboot at 0x0100_0000.

Then I give bootm 0x0100_0000

Is it fine or should I change the location ??

thanks

Ankur