With todays sources I get:

  mainbus0 (root): SUNW,SPARCstation-20L: hostid 723a65be
  cpu0 at mainbus0: mid 8: TMS390Z50 v0 or TMS390Z55 @ 85 MHz, on-chip FPU
  cpu0: physical 20K instruction (64 b/l), 16K data (32 b/l), 1024K external (32 b/l): cache enabled
  cpu1 at mainbus0: mid 10: TMS390Z50 v0 or TMS390Z55 @ 85 MHz, on-chip FPU
  cpu1: physical 20K instruction (64 b/l), 16K data (32 b/l), 1024K external (32 b/l): cache enabled

...

  cpu0: booting secondary processors: cpu1
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c0<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c7<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c6<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c1<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c4<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c7<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c2<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c5<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c0<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c3<S,PS>
  stray interrupt ipl 0x4 pc=0xf01861a0 npc=0xf01861a4 psr=400000c6<S,PS>
  panic: crazy interrupts

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