On Sat, Oct 02, 2004 at 10:40:14PM +0200, Thiemo Seufer wrote: > Thiemo Seufer wrote: > [snip] > > > With this fix the machines goes userspace (reverse engineered by sound > > > of hard disk) but seems to die somewhere. Probably the same bug as seen > > > on other archs - die on first fork. > > > > The last problem happens only on r4000 and r4400, and occasionally > > also shows up as "illegal instruction" or "unaligned access". It > > turned out to be a broken TLB handler. I temporarily switched (for > > 32bit kernels) from except_vec0_r4000 to except_vec0_r45k_bvahwbug. > > This may cause an avoidable performance loss, but at least it allows > > my R4400SC-200 (V6.0) Indy to run current 2.6 CVS. > > One more nop is enough to make it work. This should probably go in > a hazard definition. excellent, this gets up my Indigo 2 with a 200 MHz CPU and my M700: root@(none):/# cat /proc/cpuinfo system type : Jazz MIPS_Magnum_4000 processor : 0 cpu model : R4000PC V3.0 FPU V0.0 BogoMIPS : 49.76 wait instruction : no microsecond timers : yes tlb_entries : 48 extra interrupt vector : no hardware watchpoint : yes VCED exceptions : 0 VCEI exceptions : 0 Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessary a good idea. [ RFC1925, 2.3 ]
