Trying to mount root from ufs:/dev/ada0p2 []...
   kproc_start(&page_kp)... done.
   arc_free_target_init(0)... done.
subsystem e800000
   kproc_start(&vm_kp)... done.
subsystem ea00000
   kproc_start(&buf_kp)... done.
   pbuf_prealloc(0)... done.
subsystem ec00000
   kproc_start(&up_kp)... done.
   kproc_start(&vnlru_kp)... done.
subsystem ee00000
   nfsiod_setup(0)... done.
   kproc_start(&opal_heartbeat_kp)... done.
subsystem f100000
   racctd_init(0)... done.
subsystem fffffff
   start_periodic_resettodr(0)... done.

fatal kernel trap:

   exception       = 0x300 (data storage interrupt)
   virtual address = 0x1014aba0
   dsisr           = 0x40000000
   srr0            = 0xc000000002cbfa04 (0x9ffa04)
   srr1            = 0x9000000000009032
   current msr     = 0x9000000000009032
   lr              = 0xc000000002cee748 (0xa2e748)
   frame           = 0xc008000004c0be80
   curthread       = 0xc0080000948f4280
          pid = 1, comm = init

panic: data storage interrupt trap
cpuid = 15
time = 1585885032
KDB: enter: panic
[ thread pid 1 tid 100002 ]
Stopped at      kdb_enter+0x78: ori     r0, r0, 0x0
db> bt
Tracing pid 1 tid 100002 td 0xc0080000948f4280
0xc008000004c0bbe0: at vpanic+0x284
0xc008000004c0bca0: at panic+0x40
0xc008000004c0bcd0: at trap+0x528
0xc008000004c0be00: at powerpc_interrupt+0x1a0
0xc008000004c0be50: kernel DSI read trap @ 0x1014aba0 by memcpy+0xd0: srr1=0x9000000000009032
            r1=0xc008000004c0c100 cr=0x48000028 xer=0 ctr=0x3 r2=0xc0000000031ec000 sr=0x40000000 frame=0xc008000004c0be80
0xc008000004c0c100: at copyin+0x9c
0xc008000004c0c250: at exec_setregs_funcdesc+0x40
0xc008000004c0c2a0: at kern_execve+0x12cc
0xc008000004c0c700: at start_init+0x204
0xc008000004c0c830: at fork_exit+0xa8
0xc008000004c0c8c0: at fork_trampoline+0x18
0xc008000004c0c8f0: at -0x4
db>