[Qemu-discuss] SS20 running SunOS 4.1.4 - Data Access Exception on boot

[Tandy, Bob (UK)]

Hi,

A lot of people seem to be having success with the SS20 running SunOS 4.1.4 so 
perhaps someone may have a solution to my situation.
I'm using QEMU 2.4.1 for all the experiments, and have tried on both Windows 7 
and Oracle Linux hosts.

I have successfully booted from an ISO image and used that to restore a dump 
backup using a SS5 ROM image. But this gives me the wrong hostid for what I 
need to do. Having built from source the Linux executables I tweaked the code 
to try and force a "72" in first field of the hostid but this fails to start. 
So thought it might be better to run with a SS20 ROM image and I found some at 
http://home.earthlink.net/~reif/

However with either ss20_v.2.25_rom or ross225r.bin I get a "Data Access 
Exception" error,  using either the image created using SS5 or by returning to 
the ISO image to create a new, vanilla install. 

I get the following cksum output from ss20_v.2.25_rom:
        4159205650 524288 ss20_v.2.25_rom
If this is wrong then probably the problem. But where can I get a correct ROM 
image from?


Using the following to boot from "CD":
        /usr/local/bin/qemu-system-sparc -nographic -monitor 
telnet:127.0.0.1:4444,server,nowait -bios ss20_v.2.25_rom -M SS-20 -smp 
2,cores=4 -cpu "TI SuperSparc 60" -hda ss20.img -hdb solaris1.1.2.iso 

I get the following output:

           SMCC SPARCstation 10/20 UP/MP POST version VRV3.45 (09/11/95)

CPU_#0       TI, TMS390Z50(3.x)       0Mb External cache

CPU_#1       ******* NOT installed *******
CPU_#2       ******* NOT installed *******
CPU_#3       ******* NOT installed *******

    <<< CPU_00000000 on MBus Slot_00000000 >>> IS RUNNING (MID = 00000008) 


$$$$$   WARNING : No Keyboard Detected! $$$$$
MMU Context Table Reg Test   
MMU Context Register Test    
MMU TLB Bit Pattern Tests    

    <<< CPU_00000000 on MBus Slot_00000000 >>>
     ERROR : Address = 00000000, 
     exp = aaaaa000, obs = 00000000, xor = aaaaa000
     U-NUMBER : Suspect Viking Module
Available Memory 0x08000000
Allocating SRMMU Context Table 
Context Table allocated, Available Memory 0x07fc0000
Setting SRMMU Context Register
Context Table allocated, Available Memory 0x07fc0000
Setting SRMMU Context Table Pointer Register
RAMsize allocated, Available Memory 0x07fb0000
Allocating SRMMU Level 1 Table
Level 1 Table allocated, Available Memory 0x07fafc00
Mapping RAM @ 0xffef0000
RAM mapped, Available Memory 0x07fafa00
Mapping ROM @ 0xffd00000
ROM mapped, Available Memory 0x07faf800
Mapping ROM @ 0x00000000
ROM mapped, Available Memory 0x07faf000
ttya initialized
Cpu #0 TI,TMS390Z50 
Cpu #1 Nothing there 
Cpu #2 Nothing there 
Cpu #3 Nothing there 
Probing Memory Bank #0 64 Megabytes of DRAM
Probing Memory Bank #1 64 Megabytes of DRAM
Probing Memory Bank #2 Nothing there
Probing Memory Bank #3 Nothing there
Probing Memory Bank #4 Nothing there
Probing Memory Bank #5 Nothing there
Probing Memory Bank #6 Nothing there
Probing Memory Bank #7 Nothing there
Incorrect configuration checksum; 
Setting NVRAM parameters to default values.
Setting diag-switch? NVRAM parameter to true
Probing /address@hidden,e0000000/address@hidden,e0001000 at f,0  espdma esp sd 
st ledma le SUNW,bpp 
Probing /address@hidden,e0000000/address@hidden,e0001000 at e,0  
Probing /address@hidden,e0000000/address@hidden,e0001000 at 0,0  Nothing there
Probing /address@hidden,e0000000/address@hidden,e0001000 at 1,0  Nothing there
Probing /address@hidden,e0000000/address@hidden,e0001000 at 2,0  SUNW,tcx 
Probing /address@hidden,e0000000/address@hidden,e0001000 at 3,0  Nothing there
Cpu #0 TI,TMS390Z50 
Cpu #1 Nothing there 
Cpu #2 Nothing there 
Cpu #3 Nothing there 
Probing Memory Bank #0 64 Megabytes of DRAM
Probing Memory Bank #1 64 Megabytes of DRAM
Probing Memory Bank #2 Nothing there
Probing Memory Bank #3 Nothing there
Probing Memory Bank #4 Nothing there
Probing Memory Bank #5 Nothing there
Probing Memory Bank #6 Nothing there
Probing Memory Bank #7 Nothing there
Incorrect configuration checksum; 
Setting NVRAM parameters to default values.
Setting diag-switch? NVRAM parameter to true
Probing /address@hidden,e0000000/address@hidden,e0001000 at f,0  espdma esp sd 
st ledma le SUNW,bpp 
Probing /address@hidden,e0000000/address@hidden,e0001000 at e,0  
Probing /address@hidden,e0000000/address@hidden,e0001000 at 0,0  Nothing there
Probing /address@hidden,e0000000/address@hidden,e0001000 at 1,0  Nothing there
Probing /address@hidden,e0000000/address@hidden,e0001000 at 2,0  SUNW,tcx 
Probing /address@hidden,e0000000/address@hidden,e0001000 at 3,0  Nothing there

SPARCstation 20 (1 X 390Z50), No Keyboard
ROM Rev. 2.25, 128 MB memory installed, Serial #9900323.
Ethernet address 72:7:2:97:11:23, Host ID: 72971121.


Boot device: /iommu/sbus/address@hidden,400010/address@hidden,c00000  File and 
args:   
Internal loopback test -- Wrong packet length; expected 36, observed 64 

Can't open boot device

Type  help  for more information
ok boot disk1:d
Boot device: 
/iommu/sbus/address@hidden,400000/address@hidden,800000/address@hidden,0:d  
File and args: 
root on 
/address@hidden,e0000000/address@hidden,e0001000/address@hidden,400000/address@hidden,800000/address@hidden,0:d
 fstype 4.2
Boot: vmunix
Size: 868352+2319136+75288 bytes
SuperSPARC: PAC ENABLED
SunOS Release 4.1.4 (MUNIX) #2: Fri Oct 14 11:09:07 PDT 1994
Copyright (c) 1983-1993, Sun Microsystems, Inc.
cpu = SUNW,SPARCstation-20
mod0 = TI,TMS390Z50 (mid = 8)
mem = 130616K (0x7f8e000)
avail mem = 124592128
Ethernet address = 72:7:2:97:11:23
BAD TRAP: cpu=0 type=9 rp=f00e0af4 addr=0 mmu_fsr=126 rw=1
MMU sfsr=126: Invalid Address on supv data fetch at level 1
regs at f00e0af4:
        psr=40800cc5 pc=f002d1bc npc=f002d1c0
        y: 1c00000 g1: ffd3e3d8 g2: f0314400 g3: fb005ff0
        g4: f0005000 g5: f00e1000 g6: 0 g7: 30000000
        o0: 8000000 o1: fb005ff0 o2: f0005000 o3: f00e1000
        o4: 0 o5: 30000000 sp: f00e0b40 ra: 0
(unknown): Data access exception
kernel read fault at addr=0x0, pme=0x0
MMU sfsr=126: Invalid Address on supv data fetch at level 1
rp=0xf00e0af4, pc=0xf002d1bc, sp=0xf00e0b40, psr=0x40800cc5, context=0x0
g1-g7: ffd3e3d8, f0314400, fb005ff0, f0005000, f00e1000, 0, 30000000
Begin traceback... sp = f00e0b40
Called from f00a66dc, fp=f00e0ba0, args=fb0015e0 fb0015e0 fb0014e0 0 0 ffd763f0
Called from f00a6430, fp=f00e0c00, args=fb001418 f00ffbd8 6 fb0014e0 ffd763f0 
fb0015e0
Called from f00a6788, fp=f00e0c60, args=fb001418 76 73 0 f00ffbd8 76
Called from f00a63f0, fp=f00e0cc0, args=fb001160 0 0 fb001418 0 fb001418
Called from f00a6788, fp=f00e0d20, args=fb001160 76 54 0 f00ffba4 76
Called from f00a6370, fp=f00e0d80, args=fb001000 f00ff800 fb001000 fb001050 
fb0011b0 fb001160
Called from f00a6320, fp=f00e0de0, args=f0102400 fefe0014 0 0 10 f00e0dd0
Called from f00ad8b0, fp=f00e0e40, args=7fff00 f033fc04 1 800000 86 72
Called from f001630c, fp=f00e0ef8, args=800000 100000 f0788bb4 2000 7ffe 2
Called from f000539c, fp=f00e0f58, args=f00e0fb4 f0007810 293ff553 a8052044 200 
f00d1d18
Called from 403f0c, fp=0, args=4000 3ffd60 1 236320 4000 0
End traceback...
panic: Data access exception
rebooting...
Resetting ...


If I change the -cpu argument to match what is shown for CPU #0, I get 
        qemu: Unable to find SPARC CPU definition

Any pointers to where to investigate next gratefully appreciated.

I'm not in interested in getting the graphics going. What I am hoping to do is 
replicate the 21 year old original machine before the power goes off for 
several days for maintenance, I fear it may not come back online. It has been 
running for 965 consecutive days. The last reboot was last time power was 
removed was due to aircon going down. It is a good machine and deserves to 
retired gracefully after such sterling service.
 
TIA
Bobbity
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