portpmon

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

		Porting PMON
		Porting PMON

The simplest way to bring up PMON on a new board is to test it out in
two phases. In phase 1, you configure a PMON that maximizes the chances
of it coming up first time. In phase 2, you turn on all the optional features
that were turned off as part of phase 1.

Phase 1

If your board has exactly the same configuration as an existing LSI
evaluation board, you can try plugging in one of the standard PMON
PROMs. However, if PMON comes up, but dies whilest printing the banner,
you are probably having problems with either the auto memory-size, the
auto clock-frequency, or the auto nvram-type determining logic. In this
case, you should build a PMON with those features turned off, and try
again.

If you have made some changes to the standard configuration, you will need
to make some changes to PMON. Likely changes are: