Re: [hatari-devel] 68030 MMU emulation: TEMPLMON, ROMSPEED

[Uwe Seimet <Uwe.Seimet@xxxxxxxxx>]

Hi,

> I've tried to recreate the problem with your config file, but still -
> both programs are working for me. Are you using any AUTO folder
> programs or something similar (ACCs) ? 

Even without AUTO folder and ACCs I have problems. After starting
TEMPLMON and pressing Ctrl-Help (in order to call TEMPLMON) Hatari
freezes (PMMU emulation is switched on). This is the last debug output I
get:

CPU Root Pointer: 8000000200000700
Table A at 00000700: index = 0, Next descriptor: 0000074A
Table B at 00000740: index = 0, Next descriptor: 000007CA
Table C at 000007C0: index = 0, Next descriptor: 00000019
Early termination page descriptor!
Logical address unused bits: 00050000 (mask = 000F8000)
Page at 00050000
ATC is full. Replacing entry 15
ATC create entry(15): logical = 00050000, physical = 00050000, FC = 5
ATC create entry(15): B = 0, CI = 0, WP = 0, M = 1
CPU Root Pointer: 8000000200000700
Table A at 00000700: index = 0, Next descriptor: 0000074A
Table B at 00000740: index = 0, Next descriptor: 000007CA
Table C at 000007C0: index = 0, Next descriptor: 00000019
Early termination page descriptor!
Logical address unused bits: 00030000 (mask = 000F8000)
Page at 00030000
ATC create entry(7): logical = 00030000, physical = 00030000, FC = 5
ATC create entry(7): B = 0, CI = 0, WP = 0, M = 1

ROMSPEED might work with the current Hatari, at least it does not crash
anymore. It's a bit hard to tell whether it actually works because you
can not easily notice that it is active ;-).

I can still crash Hatari with yet another program using the PMMU. I
cannot provide the sources or the binary at the moment, there might be
copyright issues. I will have to check that. Anyway, this is the debug
output I get before Hatari terminates:

ATC create entry(10): logical = 00E10000, physical = 00E10000, FC = 6
ATC create entry(10): B = 0, CI = 0, WP = 0, M = 0
CPU Root Pointer: 8000000200000700
Table A at 00000700: index = 0, Next descriptor: 0000074A
Table B at 00000740: index = 0, Next descriptor: 003D509A
Table C at 003D5090: index = 0, Next descriptor: 003D50DA
Table D at 003D50D0: index = 0, Next descriptor: 00000009
Page at 00000000
ATC create entry(3): logical = 00000000, physical = 00000000, FC = 5
ATC create entry(3): B = 0, CI = 0, WP = 0, M = 1
MMU: page fault (logical addr = 00DBCEEE)
Longjumping /home/us/hatari/hatari/src/cpu/cpummu030.c in 1490
Gotcha! 2 /home/us/hatari/hatari/src/cpu/newcpu.c in 3354
Exception_mmu 00e1370a 00e13708 00dbceee
PTESTR: addr = 00DBCEEE, fc = 2, level = 7, do not return descriptor
CPU Root Pointer: 8000000200000700
Table A at 00000700: index = 0, Next descriptor: 0000074A
Table B at 00000740: index = 0, Next descriptor: 003D509A
Table C at 003D5090: index = 13, Next descriptor: 003D575A
Table D at 003D5750: index = 23, Next descriptor: 00DB801D
Page at 00DB8000
PTEST status: 0A04, B = 0, L = 0, S = 0, W = 1, I = 0, M = 1, T = 0, N =
4
PMOVE: read MMUSR 0A04
MMU: page fault (logical addr = 00DBCEEA)
Longjumping /home/us/hatari/hatari/src/cpu/cpummu030.c in 1490
Gotcha! 2 /home/us/hatari/hatari/src/cpu/newcpu.c in 3354
Exception_mmu 00e1370a 00e13708 00dbceea
MMU: page fault (logical addr = 00DB8000)
Longjumping /home/us/hatari/hatari/src/cpu/cpummu030.c in 1490
Gotcha! 2 /home/us/hatari/hatari/src/cpu/cpummu030.c in 1843
Gotcha! 2 /home/us/hatari/hatari/src/cpu/cpummu030.c in 1843
Gotcha! 2 /home/us/hatari/hatari/src/cpu/newcpu.c in 3354
Exception_mmu 00e1370a 00e13708 00db7ffe
try stack underflow...

That's all, after that Hatari simply terminates.

> Do you have by any chance another GCC version (or Clang) installed on
> your system? It could also be worth a try to use another compiler, just
> to be sure that we're not hunting compiler problems here.

Currently there is no stable clang available for my gentoo system, and
I would like to wait before installing it until I know whether you can
reproduce the problem with TEMPLMON. My guess is that you did not press
Ctrl-Help?

Take care

Uwe