5000/25

[David Holland]

Complains with 6.1.3 along the lines of (please excuse me re-typing
[...]
segment? 0 start 00000000 size 01800000
pmap_steal_memory: seg 0: 0x56d 0x56d 0x800 0x800
pid 0(system): trap: cpu0, address error (load or I-fetch) in kernel mode
status=0x80010, cause=0x30000010, epc=0x8000001c, vaddr=0xdeadbeef
tf=0x8056cce8 ksp=0x8056cd88 ra=0x800b0120 ppl=0
panic: trap
halted.

Have you tried -current? If the problem has been around since 1.6.2
this probably won't help though.

Getting deadbeef at 0x80000001c is very suspicious since that's in the
low-level TLB refill handler. However, it may be nothing other than a
null dereference early enough in boot that the pagetable isn't set up
yet.

My first suggestion would be to build a kernel with ddb in it and try
to get a stack trace. If that doesn't work, there's probably nothing
for it but loading up with printfs to try to figure out where it's
dying. :(

[Izumi Tsutsui]

Post by David Holland
Have you tried -current? If the problem has been around since 1.6.2
this probably won't help though.

AFAIK pmax port has been broken since mips64 merge
so 6.x won't work, at least on R3000 machines.

5.0 worked on my 5000/125, it might be worth to try 5.2.2.

The following page reports 4.0 worked on MAXINE, even with X.
http://paulaxford.com/html/computer_collection/dec_5000.htm
---
Izumi Tsutsui

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[David Holland]

Post by Izumi Tsutsui

Post by David Holland
Have you tried -current? If the problem has been around since 1.6.2
this probably won't help though.

AFAIK pmax port has been broken since mips64 merge
so 6.x won't work, at least on R3000 machines.

At least some of the causes of that have been fixed since, hence the
question about current.

Post by Izumi Tsutsui
5.0 worked on my 5000/125, it might be worth to try 5.2.2.

Good point though.

[Izumi Tsutsui]

Post by David Holland
At least some of the causes of that have been fixed since, hence the
question about current.

Which commit? I've never seen MIPS1 fixes since it was broken.

---
Izumi Tsutsui

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