Re: Fast Data Access MMU Miss

["J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>]

On 14 Aug 2014, at 06:09, Takeshi Nakayama <tn%catvmics.ne.jp@localhost> wrote:

>>>> "J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost> wrote
> 
>> Booting a "options DEBUG" kernel from 2014/08/13 14:00 UTC all I get is:
>> 
>>  Boot device: disk0  File and args: 
>>  NetBSD IEEE 1275 Multi-FS Bootblock
>>  Version $NetBSD: bootblk.fth,v 1.13 2010/06/24 00:54:12 eeh Exp $
>>>> NetBSD/sparc64 OpenFirmware Boot, Revision 1.16 (Wed Jun  5 11:16:40 MEST 
>>>> 2013)
>>  =0xc96e80
>>  Loading netbsd: 9498824+618048+373488 [604032+405913]=0xde9448
>>  Loaded initial symtab at 0x1cf2b28, strtab at 0x1d862a8, # entries 25137
>> 
>>  ERROR: Last Trap: Fast Data Access MMU Miss
>> 
>>  {1} ok 
>> 
>> Any ideas anyone?
> 
> Please try the attached patch.
> 
> According to the ".registers" command output from OBP, It seems
> that trap occured in binuptime and it was called too early stage of
> bootstrap.

With this patch the "options DEBUG" kernel boots -- thanks.

> Index: subr_prf.c
> ===================================================================
> RCS file: /cvsroot/src/sys/kern/subr_prf.c,v
> retrieving revision 1.154
> diff -u -d -r1.154 subr_prf.c
> --- subr_prf.c        10 Aug 2014 16:44:36 -0000      1.154
> +++ subr_prf.c        14 Aug 2014 03:34:53 -0000
> @@ -1200,7 +1200,9 @@
>       const char *xdigs;      /* digits for [xX] conversion */
>       char bf[KPRINTF_BUFSIZE]; /* space for %c, %[diouxX] */
>       char *tailp;            /* tail pointer for snprintf */
> +#ifdef RND_PRINTF
>       struct timespec ts;
> +#endif
> 
>       if (oflags == TOBUFONLY && (vp != NULL))
>               tailp = *(char **)vp;
> @@ -1549,8 +1551,8 @@
>               *(char **)vp = sbuf;
>       (*v_flush)();
> 
> -     (void)nanotime(&ts);
> #ifdef RND_PRINTF
> +     (void)nanotime(&ts);
>       SHA512_Update(&kprnd_sha, (char *)&ts, sizeof(ts));
> #endif
>       return ret;

--
J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig 
(Germany)