To support R5900 CPU, I want to commit following patch.
ftp://ftp.netbsd.org/pub/NetBSD/misc/uch/playstation2/playstation2/mips.patch
Any comments?

R5900 feature (a part of)
 + R4000 like MMU but 32bit mode only. and scratch pad support.
 + no software interrupt support.
 + COP0 hazard: mtc0, tlbr, tlbp, tlbwi, tlbwr must be followed by sync.p
 + cache ops are original.
 + single float FPU (IEEE754 not compatible)

This is TX79 data-sheet.
http://www.semicon.toshiba.co.jp/prd/risc/pdf/TX79Architecture.pdf
TX79 is R5900 based general purpose CPU.

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UCHIYAMA Yasushi
uch@vnop.net