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why "go 0x0" and "go 0x0c000000" could start u-boot?

U-Boot-Users HoHo_Zhao 2 participants 2 messages May 11, 2007 – May 15, 2007

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HoHo_Zhao

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hello, everyone:

(Will somebody write to me to tell me how i can see your replies?)

when reset cpu or power up, u-boot starts, press any key to stop it automaticly boot the kernel,
i test "go 0x0" and "go 0x0c000000", but two of them could go to restart u-boot!
I am sure u-boot was flashed in 0x0c000000, but why "go 0x0" has the same effect?!

With my mxlads board, I know another truth, when power up, cpu exec the first cmd in 0x0c000000.
(this could be set by switches)

Somebody know why?

HoHo_Zhao

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Quoted 3 lines · HoHo_Zhao

hello, everyone:

(Will somebody write to me to tell me how i can see your replies?)

If you gotten two replies at the same time, it means you can see my reply and our replies.

Quoted 2 lines

I am sure u-boot was flashed in 0x0c000000, but why "go 0x0" has the same effect?!

Probably 0x0 is kind of invalid address for normal access. So 'go 0x0' made CPU in check-stop status and then it restart CPU like reset from 0x0c000000. Pls check the board memory map to understand it.

Regards,

Sam

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