STX7105(NEXTVOD) not booting

[Rui-Xiang Guo <rxg%lavabit.com@localhost>]

Hi,
The ub file is compiled from 10.0:
NetBSD 10.0 (NEXTVOD) #0: Sat Apr 27 13:05:38 CST 2024
   text    data     bss     dec     hex filename
1874759  405144   90464 2370367  242b3f netbsd
/home/rxg/10.0/usr/src/../tool.evbsh3/bin/shle--netbsdelf-dbsym netbsd
#     image  NEXTVOD/netbsd.img
#    u-boot  NEXTVOD/netbsd.ub
 image type:  uimg
 magic:       0x27051956
 time:        Sat Apr 27 13:05:41 2024
 size:        2345496
 load addr:   0x80000000
 entry point: 0x80000040
 data crc:    0x954e5317
 os:          2 (netbsd)
 arch:        9 (sh)
 type:        2 (kernel)
 comp:        0 (none)
 name:        Test 2024-04-27 13:05
 header crc:  0xbbef501a
===> Kernels built from NEXTVOD:
  /home/rxg/10.0/usr/src/../obj.evbsh3/sys/arch/evbsh3/compile/NEXTVOD/netbsd
===> build.sh ended:      Sat Apr 27 13:05:41 CST 2024
===> Summary of results:
         build.sh command:    ./build.sh -U -u -O ../obj.evbsh3 -T ../tool.evbsh3 -j2 -m evbsh3 -a sh3el kernel=NEXTVOD

Then trying to load it from u-boot:
PDK7105> fatload usb 0:1 80000000 netbsd.ub
reading netbsd.ub
.....................................................................................................................................................................................................................................

2345560 bytes read
PDK7105> bootm 80000000
## Booting image at 80000000 ...
   Image Name:   Test 2024-04-27 13:05
   Image Type:   SuperH NetBSD Kernel Image (uncompressed)
   Data Size:    2345496 Bytes =   2.2 MiB
   Load Address: 80000000
   Entry Point:  80000040
   Verifying Checksum ... OK
   XIP Kernel Image ... OK
## Transferring control to NetBSD stage-2 loader (at address 80000040) ...

It gets stuck here. Looks like the sh3 boot code does not support STX7105 well.
Or maybe I am missing something?

-rxg