In message OF301B3B63.E25B41D2-ON482570C8.002F5342@com you wrote:

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Grrrghhhh .... posting nonsense, and then base64 encoded, too!

Please do not send base 64 encoded messages.

Please send plain text only.

I use the ARM926ejs, it need set the I/O as input, output or other status. Also it need read the I/O port.And "all IO is memory mapped". In u-boot how to support this, where to configure it, or it need write by myself.

In convention u-boot do it in cpu/<you cpu id>/start.S

NO!!!! *Never* place any board dependent code in any files in cpu/ - such code obviously belongs to your board-specific code in board/

Best regards,

Wolfgang Denk