In message 404DF1DA.2070609@buckeye.ece.drexel.edu you wrote:
I understand UBoot is not intended for use in interrupt modes, but I
This is not exactly correct. Usually interrupts are not needed and used (to keep the code simple), but nothing prevents you from using interrupts. Even the first examples for U-Boot extensions via standalone programs included a timer interrupt demo.
thought it does no harm in outputting some text on serial console everytime an interrupt comes in, say a timer interrupt (every 1 sec). I
Works fine here.
am using BDI2000 to start debugging at 0x900. But my problem is that since address translation is turned off while processing interrupts, I am not able to write to the serial port address since processor caches it and does not really push it out to the serial port. I am using ns16550 driver and the serial port is at 0x60000000.
Whats the work around for this problem ?
Do not enable data cache.
- Or shall i disable the data caches while processing interrupts ?
Don't enable DC at all.
Best regards,
Wolfgang Denk