Re: Dialup networking/ppp

[Ignatios Souvatzis <is%netbsd.org@localhost>]

On Tue, Sep 18, 2001 at 12:45:07AM +0100, Lars Hecking wrote:
> 
> > So at least if you still are using your mainboard memory, you're in trouble.
>  
>  Yes, I still have 16MB on the mobo.
> 
> > Please apply the appended patch to sys_machdep.c. It will force the 
> > mentioned
> > functions to always use line-sized flushes.
> 
> cc  -Werror -Wall -Wstrict-prototypes -Wmissing-prototypes  -Wpointer-arith 
> -Wno-uninitialized -Wno-main -O2 -m68060 -Wa,-m68030 -Wa,-m68851 -msoft-float 
> -I. -I../../../../arch -I../../../.. -nostdinc -DM68060 -DM060SP -DLKM 
> -DDIAGNOSTIC -DKBDRESET -DSERIBUF_SIZE="0x1000" -DSEROBUF_SIZE="0x200" 
> -DLEV6_DEFER -DMAXUSERS=8 -D_KERNEL -Damiga -DFPCOPROC  -c 
> ../../../../arch/amiga/amiga/sys_machdep.c
> ../../../../arch/amiga/amiga/sys_machdep.c: In function `cachectl1':
> ../../../../arch/amiga/amiga/sys_machdep.c:145: invalid lvalue in assignment
> ../../../../arch/amiga/amiga/sys_machdep.c:145: syntax error before `;'
> *** Error code 1
> 
>  Which is understandable, because my config file defines only M68060,
>  not M68040 (is that wrong?). In that context, this code fragment looks
>  just wrong to me:
> 
>                 if (addr == 0 ||
> #if defined(M68040)
> #if defined(M68060)
>                     (cputype == CPU_68040 && req & CC_IPURGE))
> #else
>                     (req & CC_IPURGE))
> #endif
> #endif
>                         doall = 1;         <--- line 145
> 
>  It should be 
> 
>                 if (addr == 0
> #if defined(M68040)
> #if defined(M68060)
>                     || (cputype == CPU_68040 && req & CC_IPURGE))
> #else
>                     || (req & CC_IPURGE))
> #endif
> #endif
>                 )
>                         doall = 1;

err, you are right here. Sorry, it was a quick and dirty patch late in the
evening, and I didn't try to check it, as I figured I would see less problems
with my 68040.

>  There appears to be some improvement. I started a download via scp and
>  a kernel compile, and the download does continue - mostly. Looking at the
>  modem leds, it sometimes stalls for a few seconds, but then continues.
> 
>  But it does that even without cpu load, although the stalling periods
>  are shorter.
> 
>  Should I recompile the kernel with M68040 enabled?
that should be fine, although not optimal.

> With M6840 enabled,
>  but not M68060?

This will definitely not work. You can't drive a 68060 without 68060 support.

That part is mostly there to use the (faster, but blocking interupts for 
extended time) flushall instruction on the 68040, but not the 68060, because
the 68040 has a smaller cache, so the maximum interupt blocking is only half
the time the 68060 needs. So if you defined 68040 only (besides making your
kernel crash at the first program (e.g., /sbin/init) start, it would not
improve over the old kernel.

Regards,
        -is