Re: Fast Data Access MMU Miss

On 14 Aug 2014, at 06:09, Takeshi Nakayama <[email protected]> wrote:

>>>> "J. Hannken-Illjes" <[email protected]> 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 - [email protected] - TU Braunschweig (Germany)