root@:~ # cu -s 115200 -l /dev/cuaU0
Connected

U-Boot SPL 2019.01 (Mar 19 2019 - 16:16:04 +0800)
DRAM: 1024 MiB
Trying to boot from MMC1


U-Boot 2019.01 (Mar 19 2019 - 16:16:04 +0800) Allwinner Technology

CPU:   Allwinner H3 (SUN8I 1680)
Model: FriendlyElec NanoPi-R1
DRAM:  1 GiB
MMC:   SUNXI SD/MMC: 0
Loading Environment from FAT... *** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   phy interface7
Could not get PHY for ethernet@1c30000: addr 7
eth-1: ethernet@1c30000
starting USB...
USB0:   USB EHCI 1.00
USB1:   USB OHCI 1.0
USB2:   USB EHCI 1.00
USB3:   USB OHCI 1.0
USB4:   USB EHCI 1.00
USB5:   USB OHCI 1.0
USB6:   USB EHCI 1.00
USB7:   USB OHCI 1.0
scanning bus 0 for devices... 1 USB Device(s) found
scanning bus 2 for devices... 2 USB Device(s) found
scanning bus 4 for devices... 1 USB Device(s) found
scanning bus 6 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
32585 bytes read in 6 ms (5.2 MiB/s)
Found EFI removable media binary efi/boot/bootarm.efi
Scanning disks on usb...
Disk usb0 not ready
Disk usb1 not ready
Disk usb2 not ready
Disk usb3 not ready
Scanning disks on mmc...
MMC Device 1 not found
MMC Device 2 not found
MMC Device 3 not found
Found 3phy interface7
mdio_register: non unique device name 'ethernet@1c30000'
Could not get PHY for ethernet@1c30000: addr 7
596920 bytes read in 31 ms (18.4 MiB/s)
## Starting EFI application at 42000000 ...
Consoles: EFI console
FreeBSD/arm EFI loader, Revision 1.1

   Command line arguments: l
   EFI version: 2.70
   EFI Firmware: Das U-Boot (rev 8217.256)
   Console: efi (0)
   Load Path: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/USB(0x6,0x0)/HD(1,0x01,0,0x42f,0x18fa8)/\efi\boot\bootarm.efi
   Load Device: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/USB(0x6,0x0)/HD(1,0x01,0,0x42f,0x18fa8)
Trying ESP: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/USB(0x6,0x0)/HD(1,0x01,0,0x42f,0x18fa8)
Setting currdev to disk0p1:
Trying: /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/USB(0x6,0x0)/HD(2,0x01,0,0x193d7,0x5e6c11)
Setting currdev to disk0p2:
Loading /boot/defaults/loader.conf
Loading /boot/device.hints
Loading /boot/loader.conf
Loading /boot/loader.conf.local
Loading kernel...
/boot/kernel/kernel text=0x855e10 data=0xb5dc8+0x25f3f8 syms=[0x4+0xa90d0+0x4+0x10ced6]
Loading configured modules...
/boot/kernel/umodem.ko text=0x1be0 text=0x1310 data=0x1088+0xf80 syms=[0x4+0x1070+0x4+0xbcd]
loading required module 'ucom'
/boot/kernel/ucom.ko text=0x1f74 text=0x2e30 data=0x1088+0x17b4 syms=[0x4+0x14f0+0x4+0xc5d]
can't find '/boot/entropy'

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Using DTB provided by EFI at 0x47ef5000.
Kernel entry at 0x73000180...
Kernel args: (null)
EHCI failed to shut down host controller.
EHCI failed to shut down host controller.
EHCI failed to shut down host controller.
EHCI failed to shut down host controller.
---<<BOOT>>---
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2019 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
 disks
FreeBSD 13.0-CURRENT r346346 GENERIC arm
FreeBSD clang version 8.0.0 (tags/RELEASE_800/final 356365) (based on LLVM 8.0.0)
WARNING: WITNESS option enabled, expect reduced performance.
VT: init without driver.
module_register: cannot register ofwbus/pcib from kernel; already loaded from kernel
Module ofwbus/pcib failed to register: 17
module_register: cannot register simplebus/pcib from kernel; already loaded from kernel
Module simplebus/pcib failed to register: 17
No PSCI/SMCCC call function found
CPU: ARM Cortex-A7 r0p5 (ECO: 0x00000000)
CPU Features:
  Multiprocessing, Thumb2, Security, Virtualization, Generic Timer, VMSAv7,
  PXN, LPAE, Coherent Walk
Optional instructions:
  SDIV/UDIV, UMULL, SMULL, SIMD(ext)
LoUU:2 LoC:3 LoUIS:2
Cache level 1:
 32KB/64B 4-way data cache WB Read-Alloc Write-Alloc
 32KB/32B 2-way instruction cache Read-Alloc
Cache level 2:
 512KB/64B 8-way unified cache WB Read-Alloc Write-Alloc
real memory  = 1073065984 (1023 MB)
avail memory = 1031495680 (983 MB)
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
__stack_chk_init: WARNING: Initializing stack protection with non-random cookies!
__stack_chk_init: WARNING: This severely limits the benefit of -fstack-protector!
random: entropy device external interface
kbd0 at kbdmux0
ofwbus0: <Open Firmware Device Tree>
ofw_clkbus0: <OFW clocks bus> on ofwbus0
clk_fixed0: <Fixed clock> on ofw_clkbus0
clk_fixed1: <Fixed clock> on ofw_clkbus0
clk_fixed2: <Fixed clock> on ofw_clkbus0
simplebus0: <Flattened device tree simple bus> on ofwbus0
rtc0: <Allwinner RTC> mem 0x1f00000-0x1f00053 irq 39,40 on simplebus0
rtc0: registered as a time-of-day clock, resolution 1.000000s
regfix0: <Fixed Regulator> on ofwbus0
regfix1: <Fixed Regulator> on ofwbus0
regfix2: <Fixed Regulator> on ofwbus0
regfix3: <Fixed Regulator> on ofwbus0
regfix4: <Fixed Regulator> on ofwbus0
regfix5: <Fixed Regulator> on ofwbus0
regfix6: <Fixed Regulator> on ofwbus0
regfix7: <Fixed Regulator> on ofwbus0
ccu_h3ng0: <Allwinner H3/H5 Clock Control Unit NG> mem 0x1c20000-0x1c203ff on simplebus0
ccu_sun8i_r0: <Allwinner SUN8I_R Clock Control Unit NG> mem 0x1f01400-0x1f014ff on simplebus0
gic0: <ARM Generic Interrupt Controller> mem 0x1c81000-0x1c81fff,0x1c82000-0x1c83fff,0x1c84000-0x1c85fff,0x1c86000-0x1c87fff irq 37 on simplebus0
gic0: pn 0x1, arch 0x2, rev 0x1, implementer 0x43b irqs 160
gpio0: <Allwinner GPIO/Pinmux controgpiobus0: <OFW GPIO bus> on gpio0
iichb0: <Allwinner Integrated I2C Bus Controller> mem 0x1c2ac00-0x1c2afff irq 34 on simplebus0
iicbus0: <OFW I2C bus> on iichb0
iichb1: <Allwinner Integrated I2C Bus Controller> mem 0x1c2b000-0x1c2b3ff irq 35 on simplebus0
iicbus1: <OFW I2C bus> on iichb1
iichb2: <Allwinner Integrated I2C Bus Controller> mem 0x1c2b400-0x1c2b7ff irq 36 on simplebus0
iicbus2: <OFW I2C bus> on iichb2
gpio1: <Allwinner GPIO/Pinmux controller> mem 0x1f02c00-0x1f02fff irq 43 on simplebus0
gpiobus1: <OFW GPIO bus> on gpio1
gpioregulator0: <GPIO controlled regulator> on ofwbus0
generic_timer0: <ARMv7 Generic Timer> irq 0,1,2,3 on ofwbus0
Timecounter "ARM MPCore Timecounter" frequency 24000000 Hz quality 1000
Event timer "ARM MPCore Eventtimer" frequency 24000000 Hz quality 1000
aw_syscon0: <Allwinner syscon> mem 0x1c00000-0x1c00fff on simplebus0
awusbphy0: <Allwinner USB PHY> mem 0x1c19400-0x1c1942b,0x1c1a800-0x1c1a803,0x1c1b800-0x1c1b803,0x1c1c800-0x1c1c803,0x1c1d800-0x1c1d803 on simplebus0
aw_syscon1: <Allwinner syscon> mem 0x1c00000-0x1c0002f on simplebus0
aw_syscon1: Cannot allocate memory resource
device_attach: aw_syscon1 attach returned 6
aw_syscon1: <Allwinner syscon> mem 0x1c00000-0x1c0002f on simplebus0
aw_syscon1: Cannot allocate memory resource
device_attach: aw_syscon1 attach returned 6
a31dmac0: <Allwinner DMA controller> mem 0x1c02000-0x1c02fff irq 4 on simplebus0
aw_mmc0: <Allwinner Integrated MMC/SD controller> mem 0x1c0f000-0x1c0ffff irq 6 on simplebus0
mmc0: <MMC/SD bus> on aw_mmc0
aw_mmc1: <Allwinner Integrated MMC/SD controller> mem 0x1c10000-0x1c10fff irq 7 on simplebus0
mmc1: <MMC/SD bus> on aw_mmc1
aw_mmc2: <Allwinner Integrated MMC/SD controller> mem 0x1c11000-0x1c11fff irq 8 on simplebus0
mmc2: <MMC/SD bus> on aw_mmc2
ehci0: <Allwinner Integrated USB 2.0 controller> mem 0x1c1a000-0x1c1a0ff irq 10 on simplebus0
usbus0: EHCI version 1.0
usbus0 on ehci0
ohci0: <Generic OHCI Controller> mem 0x1c1a400-0x1c1a4ff irq 11 on simplebus0
usbus1 on ohci0
ehci1: <Allwinner Integrated USB 2.0 controller> mem 0x1c1b000-0x1c1b0ff irq 12 on simplebus0
usbus2: EHCI version 1.0
usbus2 on ehci1
ohci1: <Generic OHCI Controller> mem 0x1c1b400-0x1c1b4ff irq 13 on simplebus0
usbus3 on ohci1
ehci2: <Allwinner Integrated USB 2.0 controller> mem 0x1c1c000-0x1c1c0ff irq 14 on simplebus0
usbus4: EHCI version 1.0
usbus4 on ehci2
ohci2: <Generic OHCI Controller> mem 0x1c1c400-0x1c1c4ff irq 15 on simplebus0
usbus5 on ohci2
ehci3: <Allwinner Integrated USB 2.0 controller> mem 0x1c1d000-0x1c1d0ff irq 16 on simplebus0
usbus6: EHCI version 1.0
usbus6 on ehci3
ohci3: <Generic OHCI Controller> mem 0x1c1d400-0x1c1d4ff irq 17 on simplebus0
usbus7 on ohci3
gpioc0: <GPIO controller> on gpio0
awg0: <Allwinner Gigabit Ethernet> mem 0x1c30000-0x1c3ffff irq 22 on simplebus0
random: randomdev_wait_until_seeded unblock wait
panic: timed sleep before timers are working
cpuid = 0
ller> mem 0x1c20800-0x1c20bff irq 18,19 on simplebus0
time = 1
KDB: stack backtrace:
db_trace_self() at db_trace_self
         pc = 0xc05bc4e0  lr = 0xc0079514 (db_trace_self_wrapper+0x30)
         sp = 0xc0e139a8  fp = 0xc0e13ac0
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
         pc = 0xc0079514  lr = 0xc02a2bf8 (vpanic+0x168)
         sp = 0xc0e13ac8  fp = 0xc0e13ae0
         r4 = 0x00000100  r5 = 0xc0b0a440
         r6 = 0xc06af63c  r7 = 0x00000000
vpanic() at vpanic+0x168
         pc = 0xc02a2bf8  lr = 0xc02a29dc (doadump)
         sp = 0xc0e13ae8  fp = 0xc0e13aec
         r4 = 0xc08dc280  r5 = 0x1999997c
         r6 = 0xc0b0a440  r7 = 0xc08633a0
         r8 = 0x00000000  r9 = 0x00000000
doadump() at doadump
         pc = 0xc02a29dc  lr = 0xc02fd060 (sleepq_set_timeout_sbt+0x1c8)
         sp = 0xc0e13af4  fp = 0xc0e13b40
         r4 = 0xc02a29dc  r5 = 0xc0e13af4
sleepq_set_timeout_sbt() at sleepq_set_timeout_sbt+0x1c8
         pc = 0xc02fd060  lr = 0xc02adea0 (_sleep+0x230)
         sp = 0xc0e13b48  fp = 0xc0e13bb0
         r4 = 0xc08dc280  r5 = 0x1999997c
         r6 = 0xc08633a0  r7 = 0x00000001
         r8 = 0x00000000  r9 = 0xc08dc280
        r10 = 0x00000000
_sleep() at _sleep+0x230
         pc = 0xc02adea0  lr = 0xc00f0b2c (randomdev_wait_until_seeded+0xd8)
         sp = 0xc0e13bb8  fp = 0xc0e13bf0
         r4 = 0x00000000  r5 = 0x00000000
         r6 = 0x00000000  r7 = 0x00000000
         r8 = 0xc0863160  r9 = 0xc06e0ddb
        r10 = 0x00000000
randomdev_wait_until_seeded() at randomdev_wait_until_seeded+0xd8
         pc = 0xc00f0b2c  lr = 0xc00f0bf4 (read_random+0x48)
         sp = 0xc0e13bf8  fp = 0xc0e13c18
         r4 = 0x00000020  r5 = 0xc0e13c50
         r6 = 0xc0e13c50  r7 = 0xc0863160
         r8 = 0xc3443000  r9 = 0xc3365000
        r10 = 0xc0861fd0
read_random() at read_random+0x48
         pc = 0xc00f0bf4  lr = 0xc03881e8 (arc4rand+0x1b8)
         sp = 0xc0e13c20  fp = 0xc0e13ca0
         r4 = 0x00000000  r5 = 0xc3443000
         r6 = 0xc0e13c50  r7 = 0xc3365000
arc4rand() at arc4rand+0x1b8
         pc = 0xc03881e8  lr = 0xc0388404 (arc4random+0x1c)
         sp = 0xc0e13ca8  fp = 0xc0e13cb0
         r4 = 0xc51efe00  r5 = 0xc3443000
         r6 = 0x0000ffff  r7 = 0x00000000
         r8 = 0xc3443000  r9 = 0x00050006
        r10 = 0xc0861fd0
arc4random() at arc4random+0x1c
         pc = 0xc0388404  lr = 0xc05fa970 (awg_attach+0xbf4)
         sp = 0xc0e13cb8  fp = 0xc0e13d50

awg_attach() at awg_attach+0xbf4
         pc = 0xc05fa970  lr = 0xc02dccc8 (device_attach+0x4e0)
         sp = 0xc0e13d58  fp = 0xc0e13da0
         r4 = 0xc51efe00  r5 = 0xc51f1880
         r6 = 0xf382ec12  r7 = 0x00000000
         r8 = 0xc0b06d0c  r9 = 0xc02e1400
        r10 = 0xc51efe50
device_attach() at device_attach+0x4e0
         pc = 0xc02dccc8  lr = 0xc02dc74c (device_probe_and_attach+0x8c)
         sp = 0xc0e13da8  fp = 0xc0e13dc0
         r4 = 0xc51efe00  r5 = 0xc3324920
         r6 = 0x3e0d8f29  r7 = 0x00000000
         r8 = 0xc0a9d2b4  r9 = 0xc0b17558
        r10 = 0xc0b0a098
device_probe_and_attach() at device_probe_and_attach+0x8c
         pc = 0xc02dc74c  lr = 0xc02dea2c (bus_generic_new_pass+0xe8)
         sp = 0xc0e13dc8  fp = 0xc0e13de0
         r4 = 0xc51efe00  r5 = 0xc0884ba4
         r6 = 0xc08d70dc r10 = 0xc0b0a098
bus_generic_new_pass() at bus_generic_new_pass+0xe8
         pc = 0xc02dea2c  lr = 0xc02dea1c (bus_generic_new_pass+0xd8)
         sp = 0xc0e13de8  fp = 0xc0e13e00
         r4 = 0xc51f1880  r5 = 0xc0884ba4
         r6 = 0xc08cf758  r7 = 0x00000000
         r8 = 0xc0a9d2b4 r10 = 0xc0b0a098
bus_generic_new_pass() at bus_generic_new_pass+0xd8
         pc = 0xc02dea1c  lr = 0xc02dea1c (bus_generic_new_pass+0xd8)
         sp = 0xc0e13e08  fp = 0xc0e13e20
         r4 = 0xc51f1b80  r5 = 0xc0884ba4
         r6 = 0xc08ab318  r7 = 0x00000000
         r8 = 0xc0a9d2b4 r10 = 0xc0b0a098
bus_generic_new_pass() at bus_generic_new_pass+0xd8
         pc = 0xc02dea1c  lr = 0xc02dea1c (bus_generic_new_pass+0xd8)
         sp = 0xc0e13e28  fp = 0xc0e13e40
         r4 = 0xc51f1d80  r5 = 0xc0884ba4
         r6 = 0xc51f2000  r7 = 0x00000000
         r8 = 0xc0a9d2b4 r10 = 0xc0b0a098
bus_generic_new_pass() at bus_generic_new_pass+0xd8
         pc = 0xc02dea1c  lr = 0xc02da214 (bus_set_pass+0x94)
         sp = 0xc0e13e48  fp = 0xc0e13e60
         r4 = 0xc51f8040  r5 = 0xc0884ba4
         r6 = 0xc51f2000  r7 = 0xc0a9d2b4
         r8 = 0x7fffffff r10 = 0xc0b0a098
bus_set_pass() at bus_set_pass+0x94
         pc = 0xc02da214  lr = 0xc023f26c (mi_startup+0x2cc)
         sp = 0xc0e13e68  fp = 0xc0e13e90
         r4 = 0xc33901cc  r5 = 0xc0a89d00
         r6 = 0x00800001  r7 = 0x00000000
         r8 = 0x03800000  r9 = 0xc0b0a434
mi_startup() at mi_startup+0x2cc
         pc = 0xc023f26c  lr = 0xc00002c4 (_start+0x144)
         sp = 0xc0e13e98  fp = 0x00000000
         r4 = 0xc00003f8  r5 = 0xc0b68000
         r6 = 0x00000000  r7 = 0x00c52078
         r8 = 0xc0d3d000  r9 = 0x7af29de0
        r10 = 0x00000000
_start() at _start+0x144
         pc = 0xc00002c4  lr = 0xc00002c4 (_start+0x144)
         sp = 0xc0e13e98  fp = 0x00000000
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x58: ldrb    r15, [r15, r15, ror r15]!
db>