hi, i'd like to release GIO64 bus support. Before doing so DBE/IBE handling should be done in the same fashion for both mips and mips64 (*). Currently mips is using handler in handler via dbe_board_handler and ibe_board_handler which are not used anywhere while mips64 is using BUILD_HANDLER macro defined in include/asm-mips64/exception.h (see arch/mips64/sgi-ip27/ip27-dbe-glue.S) Unfortunately I have nearly zero knowledge of MIPS assembler, so I'm unable to code mips way same as mips64 is... Help from someone more experienced will be greatly appreciated :-) (*) How GIO device detection works? each IP22 machine contains three GIO bus slots. GIO device provides information about itself in first (three) word(s) of address space it occupies. The only way how to detect GIO card is trying to read word from it's base address. If DBE exception is generated then there is definitely no card present, otherwise read value encodes information about device. ladis
