Re: The problems in src/sys/dev/ic/isp.c

On 4/24/26 23:13, Dennis Clarke wrote:
> On 4/24/26 11:45, Jason Thorpe wrote:
>>
>>> On Apr 21, 2026, at 3:42 PM, Dennis Clarke <[email protected]> wrote:
>>>
>>> No rush. This has gone on for months now. I will make a backup tape
>>> of the current OpenBSD situation and then prepare some disks in a SCSI
>>> array for the NetBSD experiments.

Quite mysteriously the DEC AlphaStation 600 was kind enough to power on
and then go into firmware magic and perform "init" today. I have done
nothing ( yet ) with the dreaded DALLAS RTC battery chip.

Sadly the iso image for NetBSD-11.99.5-alpha seems to show a panic :

 >>>init
ff.fe.fd.fc.fb.fa.f9.f8.f7.f6.f5.
ef.ee.ed.f4.ec.eb.
ea.e9.e8.e7.e6.e5.e4.
  Digital AlphaStation 600 5/266 Console V6.9-5
         built on Oct 10 1998 at 14:22:57
 >>>show config

Firmware
SRM Console:    V6.9-5
ARC Console:    4.57
PALcode:        VMS PALcode V1.20-0, OSF PALcode V1.22-0
SROM Version:   V1.2

Processor
DECchip (tm) 21164-5    Pass 4  266 MHz  96 KBytes SCache
2 MB BCache
CIA ASIC Pass 2

MEMORY


Memory Size = 1024Mb

Bank      Size/Sets   Base Addr     Speed
------    ----------  ---------     -----
00        256Mb/2     000000000     Fast
01        256Mb/2     010000000     Fast
02        256Mb/2     020000000     Fast
03        256Mb/2     030000000     Fast


BCache Size = 2Mb

Tested Memory =  1024Mbytes

PCI Bus
      Bus 00  Slot 07: Digital ZLXp Graphics Controller
  


      Bus 00  Slot 08: DECchip 21050 PCI to PCI Bridge
        Bus 01  Slot 00: DECchip 21040 Network Controller
                                    ewa0.0.0.1000.0 
08-00-2B-E7-D4-57

        Bus 01  Slot 01: ISP1020 Scsi Controller
                                    pka0.7.0.1001.0       SCSI Bus ID 7 

                                    dka500.5.0.1001.0      RRD45 


        Bus 01  Slot 02: ISP1020 Scsi Controller
                                    pkb0.7.0.1002.0       SCSI Bus ID 7 

                                    dkb100.1.0.1002.0      SEAGATE 
ST336704LSUN
                                    dkb200.2.0.1002.0      SEAGATE 
ST336704LSUN
                                    dkb300.3.0.1002.0      SEAGATE 
ST336704LSUN

      Bus 00  Slot 09: DECchip 21152 PCI to PCI Bridge
        Bus 02  Slot 04: Vendor: 1000  Device: f
        Bus 02  Slot 05: Vendor: 1022  Device: 2000
      Bus 00  Slot 10: Intel   8275EB PCI to Eisa Bridge
  



EISA Bus Modules (installed)

EISA/ISA NVR configuration
         SLOT    Module
          1      ISA2000
 >>>boot dkb200
(boot dkb200.2.0.1002.0 -flags A)
block 0 of dkb200.2.0.1002.0 is a valid boot block
reading 13 blocks from dkb200.2.0.1002.0
bootstrap code read in
base = 142000, image_start = 0, image_bytes = 1a00
initializing HWRPB at 2000
initializing page table at 134000
initializing machine state
setting affinity to the primary CPU
jumping to bootstrap code

NetBSD/alpha 11.99.5 ISO 9660 Primary Bootstrap
Jumping to entry point...

NetBSD/alpha 11.99.5 Secondary Bootstrap, Revision 1.13 (Wed Apr 22 
03:25:12 UTC 2026)

VMS PAL rev: 0x1000000010114
OSF PAL rev: 0x1000000020116
Switch to OSF PAL code succeeded.

Boot flags: A
11314192+254592=0xb08d40

Entering netbsd at 0xfffffc0000a01410...
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
[   1.0000000]     2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 
2013,
[   1.0000000]     2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 
2023,
[   1.0000000]     2024, 2025, 2026
[   1.0000000]     The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All 
rights reserved.

[   1.0000000] NetBSD 11.99.5 (INSTALL) #1: Wed Apr 22 04:27:07 PDT 2026
[   1.0000000] 
thorpej@the-ripe-vessel:/nbsd/objdir/alpha/sys/arch/alpha/compile/INSTALL
[   1.0000000] Digital AlphaStation 600 5/266, 266MHz
[   1.0000000] 8192 byte page size, 1 processor.
[   1.0000000] total memory = 1024 MB
[   1.0000000] (2224 KB reserved for PROM, 1021 MB used by NetBSD)
[   1.0000000] avail memory = 996 MB
[   1.0000000] mainbus0 (root)
[   1.0000000] cpu0 at mainbus0: ID 0 (primary), 21164-0 (EV5)
[   1.0000000] cia0 at mainbus0: DECchip 2117x Core Logic Chipset 
(ALCOR/ALCOR2), pass 2
[   1.0000000] pci0 at cia0 bus 0
[   1.0000000] tga0 at pci0 dev 7 function 0: DC21030 step C, board type 
T8-02
[   1.0000000] tga0: 1280 x 1024, 8bpp, Bt485 RAMDAC
[   1.0000000] tga0: interrupting at kn20aa irq 8
[   1.0000000] wsdisplay0 at tga0 (kbdmux ignored)
[   1.0000000] ppb0 at pci0 dev 8 function 0: vendor 1011 product 0001 
(rev. 0x02)
[   1.0000000] pci1 at ppb0 bus 1
[   1.0000000] tlp0 at pci1 dev 0 function 0: DECchip 21040 Ethernet, 
pass 2.3
[   1.0000000] tlp0: interrupting at kn20aa irq 16
[   1.0000000] tlp0: Ethernet address 08:00:2b:e7:d4:57
[   1.0000000] tlp0: 10baseT, 10baseT-FDX, 10base5, manual
[   1.0000000] isp0 at pci1 dev 1 function 0: QLogic 1020 Fast Wide SCSI HBA
[   1.0000000] isp0: interrupting at kn20aa irq 17
[   1.0000000] isp0: invalid NVRAM header
[   1.0000000] isp1 at pci1 dev 2 function 0: QLogic 1020 Fast Wide SCSI HBA
[   1.0000000] isp1: interrupting at kn20aa irq 18
[   1.0000000] isp1: invalid NVRAM header
[   1.0000000] ppb1 at pci0 dev 9 function 0: vendor 1011 product 0024 
(rev. 0x03)
[   1.0000000] pci2 at ppb1 bus 2
[   1.0000000] siop0 at pci2 dev 4 function 0: Symbios Logic 53c875 
(ultra-wide scsi)
[   1.0000000] siop0: using on-board RAM
[   1.0000000] siop0: interrupting at kn20aa irq 12
[   1.0000000] scsibus0 at siop0: 16 targets, 8 luns per target
[   1.0000000] pcn0 at pci2 dev 5 function 0: AMD PCnet-PCI Ethernet
[   1.0000000] pcn0: Am79c971 PCnet-FAST rev 5, Ethernet address 
00:60:b0:fa:1e:c7
[   1.0000000] pcn0: interrupting at kn20aa irq 13
[   1.0000000] lxtphy0 at pcn0 phy 1: LXT970 10/100 media interface, rev. 1
[   1.0000000] lxtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
[   1.0000000] ukphy0 at pcn0 phy 31: OUI 0x000058, model 0x0001, rev. 1
[   1.0000000] ukphy0: 10baseT, 10baseT-FDX, auto
[   1.0000000] pceb0 at pci0 dev 10 function 0: vendor 8086 product 0482 
(rev. 0x05)
[   1.0000000] eisa0 at pceb0
[   1.0000000] isa0 at pceb0
[   1.0000000] panic: _isa_dmainit: unable to map DMA controller #1
[   1.0000000] cpu0: Begin traceback...
[   1.0000000] at 0xfffffc0000145718 pc 0xfffffc0000d52764
[   1.0000000] cpu0: End traceback...
Stopped in pid 0.0 (system) at  fffffc0000a509b4:       ret     zero,(ra)
db>
db> bt

Nothing. I do not see a registers command available.

Perhaps there is a way to trace/step into this ?

If you wanted direct access to the machines serial console then I can
easily ( with SSH etc ) set that up. I am not sure what else to do.


-- 
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken