First, does the PSP's processor have a MMU? If not, then there is not much point in porting Linux (or for that matter, anything else). A machine without a MMU is pretty worthless under Linux except as a fixed-function embedded system; to wit, mmap(2) will not work. Next, see http://www.linux-mips.org/wiki/index.php/Porting - it's excellent. I don't know if a PSP has an accessible serial port - if not, then you are somewhat screwed (OK, so not that bad; I've done a port that used graphical display from the beginning for all debugging purposes). You've got to do three things: 1) use lines no longer than 80 chars in your mails ;) 2) get all docs on the PSP you can get - reverse engineering is fun but only if you enjoy hacking for 14 hours a day, 3) take a look at some directory in arch/mips. Of course, the hardest of them is (2) in my experience, unless Sony felt generous at the time and released all PSP docs. My port was completely reverse-engineered but I wouldn't advise to do that unless you are sure you can spare the time and effort. Oh, and one more thing: USE THE CVS LINUX-MIPS.ORG TREE! The kernel.org tree is so out of sync that it's virtually worthless. Cheers, Stanislaw Skowronek
