CI20 fails to boot.

Hi,

CI20 has been failing to boot successfully to a prompt since July.
Maybe it is my unit. I am using the git mirror from github. (I think
it is https://github.com/jsonn/src)
The last checkin that works for me is:

-----------------
commit 990897508781154302d3060754e86aa7e20eaec5
Author: matt <[email protected]>
Date:   Mon Jul 11 16:10:10 2016 +0000

    Welcome 7.99.34
------------------

The dmesg from yesterdays head is included below. Crash at the end.
I tried only the square purple board (Revision V2).
Thanks,
Lwazi

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 7.99.64 (CI20) #76: Fri Mar  3 00:39:33 EST 2017
Ingenic XBurst
total memory = 1024 MB
avail memory = 1010 MB
mainbus0 (root)
cpu0 at mainbus0: 1200.00MHz (hz cycles = 120000, delay divisor = 12)
cpu0: Ingenic XBurst (0x3ee1024f) Rev. 79 with unknown FPC type
(0x330000) Rev. 0
cpu0: 32 TLB entries, 16MB max page size
cpu0: 32KB/32B 8-way set-associative L1 instruction cache
cpu0: 32KB/32B 8-way set-associative write-back coherent L1 data cache
cpu0: 256KB/128B 8-way set-associative write-back L2 unified cache
apbus0 at mainbus0
JZ_CLKGR0 000077e0
JZ_CLKGR1 000073e0
JZ_SPCR0  00000000
JZ_SPCR1  00000000
JZ_SRBC   00000002
JZ_OPCR   000015e6
JZ_UHCCDR c0000000
JZ_ERNG   00000001
JZ_RNG    97b77251
efuse0 at apbus0 addr 0x134100d0: Ingenic EFUSE Slave Interface
com0 at apbus0 addr 0x10030000 irq 51: Ingenic UART, working fifo
com0: console
com1 at apbus0 addr 0x10031000 irq 50: Ingenic UART, working fifo
com2 at apbus0 addr 0x10032000 irq 49: Ingenic UART, working fifo
com3 at apbus0 addr 0x10033000 irq 48: Ingenic UART, working fifo
com4 at apbus0 addr 0x10034000 irq 34: Ingenic UART, working fifo
dwctwo0 at apbus0 addr 0x13500000 irq 21: USB OTG controller
ohci0 at apbus0 addr 0x134a0000 irq 5: OHCI USB controller
ohci0: OHCI version 1.0
usb0 at ohci0: USB revision 1.0
ehci0 at apbus0 addr 0x13490000 irq 20: EHCI USB controller
ehci0: companion controller, 1 port each: ohci0
usb1 at ehci0: USB revision 2.0
dme0 at apbus0 addr 0x16000000: DM9000 Ethernet controller
jzgpio at apbus0 addr 0x10010000 not configured
jzgpio at apbus0 addr 0x10010100 not configured
jzgpio at apbus0 addr 0x10010200 not configured
jzgpio at apbus0 addr 0x10010300 not configured
jzgpio at apbus0 addr 0x10010400 not configured
jzgpio at apbus0 addr 0x10010500 not configured
jziic0 at apbus0 addr 0x10050000 irq 60: SMBus controller
iic0 at jziic0: I2C bus
jziic1 at apbus0 addr 0x10051000 irq 59: SMBus controller
iic1 at jziic1: I2C bus
jziic2 at apbus0 addr 0x10052000 irq 58: SMBus controller
iic2 at jziic2: I2C bus
jziic3 at apbus0 addr 0x10053000 irq 57: SMBus controller
iic3 at jziic3: I2C bus
jziic4 at apbus0 addr 0x10054000 irq 56: SMBus controller
iic4 at jziic4: I2C bus
pcf8563rtc0 at iic4 addr 0x51: NXP PCF8563 Real-time Clock
jzmmc at apbus0 addr 0x13450000 not configured
jzmmc at apbus0 addr 0x13460000 not configured
jzmmc at apbus0 addr 0x13470000 not configured
jzfb at apbus0 addr 0x13050000 not configured
jzrng0 at apbus0 addr 0x100000dc: Ingenic random number generator
usb2 at dwctwo0: USB revision 2.0
pid 0(system): trap: cpu0, reserved instruction in kernel mode
status=0x20000003, cause=0x428, epc=0x8028e820, vaddr=0xc0180000
tf=0x803edd98 ksp=0x803ede38 ra=0x8000001c ppl=0x8bf62d90
kernel: reserved instruction trap
Stopped in pid 0.1 (system) at  netbsd:memset+0x60:     sw      a3,0(v1)
db> t
0x803ede38: memset+60 (c0180000,c0190000,0,0) ra 801e6cfc sz 48
0x803ede68: kmem_intr_zalloc+30 (c0180000,c0190000,0,0) ra 801e7060 sz 32
0x803ede88: kmem_zalloc+90 (c0180000,c0190000,0,0) ra 80162aa4 sz 48
0x803edeb8: ubc_init+60 (c0180000,c0190000,0,0) ra 8029cc44 sz 48
0x803edee8: main+3d8 (c0180000,c0190000,0,0) ra 800200c0 sz 96
0x803edf48: kernel_text+c0 (c0180000,c0190000,0,0) ra 0 sz 0
User-level: pid 0.1