hi everybody:
  These days a problem drive me to read the code about mpc8247 cpm2 smc or scc uart.
The problem is that, very very occasionally when my system bring up, I find the serial
port can not work. The serial port connects with smc1 and is a console port. when the
problem occured, the tx of smc1 is still ok. I send 'break' to the port, and dump the
register of smc . The indicators of 'break' len and 'break' times show it reciverd the
signal. Catting /proc/interrupts I find the interrupts counter do not increase.
It seemed the irq of smc disabled by systerm. Somehow, when the problem occured, there
were a lot of 'break' signal recived the serial port, maybe this is hardware mistake.
And the mistake lead the problem.
       Do anyone troubled with these problem?

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