4ac5893e12
not last long if you use it, but an idle machine has stayed up 10 hours. - for the !SPITFIRE case, use ASI_DCACHE_INVALIDATE instead of ASI_DCACHE_TAG when clearing tlb entries. from openbsd. - convert some comment "! Not yet" into "WRITEME", so that attempting to build a USIII MULTIPROCESSOR kernel fails to build until the code is written. - add some more WRITEME's for the above. - implement a !SPITFIRE version of sp_tlb_flush_all(). since there are no spare regs, for now just always increase %tl around this call. (we could maybe store a token in %o3 along with the saved %pstate info.)