I am interested in designing a low cost JTAG port debugging tool for the IBM PowerPC Processors 405 series.
Any kind of guidance in this regards will be highly appreciated.
The JTAG debugger interface to the PowerPC 405 series is proprietary. You will have to contact either IBM or Motorola and sign a NDA before you can get this information.
That is correct, but I hope that I may be able to get that information in near future. What I want is some example source code using JTAG port even if it is for some other processor or device.