RE: [TUHS] Re: 4.3 BSD version in the Unix Archive

I found out a bit more. For any non-OpenVMS OS I tried on simh/vax (read: different flavors of BSD), disk initialization is a common problem area. NetBSD glitches on mounting the installation CD/disk, Quasijarus has a hard time deciding which disks are online and which are not, and finally OpenBSD installs without problem, but fails when mounting the root filesystem when it boots off ra0a. I can however boot off the install-time kernel on the floppy disk and access the partitions on ra0 just fine. It became apparent that OpenBSD's in-core disk label defaulted to data matching the c partition where the a partition should have been. After more digging, it seemed that ra_putonline was called, but rx_putonline must have failed somehow. To add insult to injury, after adding a few printf statements to rx_putonline the OpenBSD sort-of-GENERIC kernel now boots. Here's the relevant block of code: rx_putonline(rx) struct rx_softc *rx; { struct mscp *mp; struct mscp_softc *mi = (struct mscp_softc *)rx->ra_dev.dv_parent; volatile int i; printf("entered rx_putonline\n"); rx->ra_state = DK_CLOSED; mp = mscp_getcp(mi, MSCP_WAIT); mp->mscp_opcode = M_OP_ONLINE; mp->mscp_unit = rx->ra_hwunit; mp->mscp_cmdref = 1; *mp->mscp_addr |= MSCP_OWN | MSCP_INT; /* Poll away */ i = bus_space_read_2(mi->mi_iot, mi->mi_iph, 0); if (tsleep(&rx->ra_dev.dv_unit, PRIBIO, "rxonline", 100*100)) rx->ra_state = DK_CLOSED; printf("rx->ra_state = %d\n",rx->ra_state); if (rx->ra_state == DK_CLOSED) return MSCP_FAILED; printf("rx_putonline returns DONE\n"); return MSCP_DONE; } My guess is that the very first printf upsets the emulation timing just enough to make things work. I'd have to read more code and RQDX3 documentation to take this further, but maybe this is enough to go on to make it obvious to somebody else why Quasijarus on simh exhibits these awfully long disk probe timeouts. I hope that once this problem has been narrowed down a bit more, a fix to simh/vax will make all BSDs happy.

-----Original Message----- From: Michael Sokolov [mailto:msokolov@ivan.Harhan.ORG] Sent: Friday, September 26, 2003 3:48 PM To: jmbw(a)nather.com; tuhs(a)tuhs.org Subject: RE: [TUHS] Re: 4.3 BSD version in the Unix Archive [...] If so, SIMH's MSCP emulation must be lacking in quality. [...]But I will grant the possibility that the kernel is not w/o fault either in that perhaps it's going south (dereferencing a garbage pointer and crashing) when the MSCP controller (in this case SIMH's poor emulation) is doing something it doesn't expect. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com) Version: 6.0.520 / Virus Database: 318 - Release Date: 9/18/2003 _______________________________________________ TUHS mailing list TUHS(a)minnie.tuhs.org http://minnie.tuhs.org/mailman/listinfo/tuhs