paddreg

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

		PMON - Adding Registers
		Adding Registers

Adding registers to PMON is very simple. You might want to do this in
order to make PMON able to display and modify the registers of
peripheral devices that you have on your own board. For example, if you
have a real-time clock chip that contains 4 registers. You can add
these registers to PMON so that you can display and set them from the
PMON command line.

The register information is entered into a table that is located
in the appropriate file in the lib directory. For example, if your
processor uses the 4001 core, you should add the registers to the
array c4001_reglist located in the file lib/c4001.c. 
A fragment of this table is shown below..

        {mXc0,mips_cause_def,"C0_CAUSE","CAUSE",13,(F_CP0|F_MIPS)},
        {mXmem,0,"M_TIC0","TIC0",M_TMR4001+O_TIC0},
        {mXmem,Tmr4003Stat,"M_TSTAT","TSTAT",M_TMR4001+O_TSTAT},

Reading from left to right, the field definitions are as follows...