u-boot and ubldr on arm64

Fri Dec 18 18:18:39 UTC 2015

Hello.

I’ve been taking a stab at getting an arm64 kernel running on qemu acting as a Zynq Ultrascale evaluation board.  The first hurdle was getting the u-boot API and ubldr to compile and run in 64-bit mode.  I’ve managed to get that much to work and wanted to let you know in case this is interesting and I can share the code.  Or, so you can tell me that u-boot/ubldr is the wrong approach.

In any case, here’s how far it boots.  The next step is to whip my kernel configuration into shape but I may have to put this aside until after the holidays.

Cheers,
—Thomas

—
Thomas Skibo
thomasskibo at yahoo.com

Script started on Fri 18 Dec 2015 09:34:49 AM PST
skibo at robleda:~/Projects/Zynq/qemu$ source GO.txt 
WARNING: Image format was not specified for '../debug.qemu/SDCARD.img' and probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.
QEMU 2.4.93 monitor - type 'help' for more information
(qemu) c[K
(qemu) 

U-Boot 2015.07-00006-gd3fba7f-dirty (Dec 18 2015 - 09:30:17 -0800) Xilinx ZynqMP

I2C:   ready
DRAM:  1 GiB
Enabling Caches...

EL Level:	EL1
NAND:  ERROR:arasan_nand_reset timedout
ERROR:arasan_nand_read_buf timedout:Buff RDY
ERROR:arasan_nand_read_buf timedout:Xfer CMPLT
ERROR:arasan_nand_read_buf timedout:Buff RDY
ERROR:arasan_nand_read_buf timedout:Xfer CMPLT
ERROR:arasan_nand_read_buf timedout:Buff RDY
ERROR:arasan_nand_read_buf timedout:Xfer CMPLT
ERROR:arasan_nand_read_buf timedout:Buff RDY
ERROR:arasan_nand_read_buf timedout:Xfer CMPLT
arasan_nand_init: nand_scan_ident failed
NAND init failed
0 MiB
MMC:   zynq_sdhci: 0
Using default environment

In:    serial
Out:   serial
Err:   serial
Bootmode: JTAG_MODE
SCSI:  SATA link 0 timeout.
AHCI 0001.0000 32 slots 2 ports 1.5 Gbps 0x3 impl SATA mode
flags: ncq only 
scanning bus for devices...
Found 0 device(s).
Net:   Gem.ff0b0000
Hit any key to stop autoboot:  5  0 
ZynqMP> fatls mmc 0
   254704   ubldr 
      172   uenv.txt 
   160405   demo 
     1408   board.dtb 

4 file(s), 0 dir(s)

ZynqMP> fatload mmc 0 0x1000000 ubldr
reading ubldr
254704 bytes read in 72 ms (3.4 MiB/s)
ZynqMP> setenv fdt_file board.dtb
ZynqMP> bootelf 0x1000000
## Starting application at 0x010000b0 ...
Consoles: U-Boot console  
Compatible U-Boot API signature found @3df02860

FreeBSD/aarch64 U-Boot loader, Revision 1.2
(skibo at ashbury, Fri Dec 18 09:33:17 PST 2015)

DRAM: 1024MB
Number of U-Boot devices: 2
U-Boot env: loaderdev not set, will probe all devices.
Found U-Boot device: disk
  Probing all disk devices...
  Checking unit=0 slice=<auto> partition=<auto>... good.
Booting from disk0s2a:
|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/boot/kernel/kernel data=0x5ead28+0x2f4620 /-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/syms=[0x8+0xc0120-\|/-\+0x8+0xbde15|/-\|/]

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel] in 9 seconds... Booting [/boot/kernel/kernel] in 8 seconds... Booting [/boot/kernel/kernel] in 7 seconds... 

Type '?' for a list of commands, 'help' for more detailed help.
loader> boot -v
[37m[44mBooting...[m
\|/-\|/-\|/boot/kernel/board.dtb size=0x580
Loaded DTB from file 'board.dtb'.
/-\|/Kernel entry at 0x0x1201000...
Kernel args: -v
KDB: debugger backends: ddb
KDB: current backend: ddb
No CPU data, limiting to 1 core
Copyright (c) 1992-2015 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.
FreeBSD 11.0-CURRENT #11 r292424M: Fri Dec 18 01:16:09 PST 2015
    skibo at ashbury:/usr/obj/arm64.aarch64/usr/src/sys/EP108 arm64
FreeBSD clang version 3.7.0 (tags/RELEASE_370/final 246257) 20150906
WARNING: WITNESS option enabled, expect reduced performance.
Preloaded elf kernel "/boot/kernel/kernel" at 0xffffff8000a61000.
Preloaded dtb "/boot/kernel/board.dtb" at 0xffffff8000a61a28.
CPU(0): ARM Cortex-A53 r0p4
CPU0 affinity: 0.0.0.0
FreeBSD/SMP: Multiprocessor System Detected: 1 CPUs
ULE: setup cpu 0
random: entropy device external interface
null: <full device, null device, zero device>
openfirm: <Open Firmware control device>
mem: <memory>
nfslock: pseudo-device
crypto: <crypto core>
random: harvesting attach, 8 bytes (4 bits) from nexus0
ofwbus0: <Open Firmware Device Tree>
simplebus0: <Flattened device tree simple bus> on ofwbus0
random: harvesting attach, 8 bytes (4 bits) from simplebus0
simplebus1: <Flattened device tree simple bus> on ofwbus0
random: harvesting attach, 8 bytes (4 bits) from simplebus1
random: harvesting attach, 8 bytes (4 bits) from ofwbus0
gic0: <ARM Generic Interrupt Controller> mem 0xf9010000-0xf901ffff,0xf902f000-0xf9030fff,0xf9040000-0xf905ffff,0xf906f000-0xf9070fff on simplebus0
gic0: pn 0x0, arch 0x0, rev 0x0, implementer 0x0 irqs 192
random: harvesting attach, 8 bytes (4 bits) from gic0
uart0: <Cadence UART> mem 0xff000000-0xff000fff irq 53 on simplebus1
uart0: console (115200,n,8,1)
uart0: fast interrupt
uart0: PPS capture mode 2 (DCD)
random: harvesting attach, 8 bytes (4 bits) from uart0
uart1: <Cadence UART> mem 0xff010000-0xff010fff irq 54 on simplebus1
uart1: fast interrupt
uart1: PPS capture mode 2 (DCD)
random: harvesting attach, 8 bytes (4 bits) from uart1
simplebus1: <ethernet at ff0b0000> mem 0xff0b0000-0xff0b0fff irq 89,89 compat cadence,gem (no driver attached)
cryptosoft0: <software crypto>
crypto: assign cryptosoft0 driver id 0, flags 100663296
crypto: cryptosoft0 registers alg 1 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 2 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 3 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 4 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 5 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 16 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 6 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 7 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 18 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 19 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 20 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 8 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 15 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 9 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 10 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 13 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 14 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 11 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 22 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 23 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 25 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 24 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 26 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 27 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 28 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 21 flags 0 maxoplen 0
crypto: cryptosoft0 registers alg 17 flags 0 maxoplen 0
random: harvesting attach, 8 bytes (4 bits) from cryptosoft0
Device configuration finished.
procfs registered
panic: No usable event timer found!
cpuid = 0
KDB: stack backtrace:
db_trace_self() at db_trace_self_wrapper+0x28
	 pc = 0xffffff80004460b4  lr = 0xffffff800004eaf8
	 sp = 0xffffff800000b8e0  fp = 0xffffff800000ba00

db_trace_self_wrapper() at vpanic+0x170
	 pc = 0xffffff800004eaf8  lr = 0xffffff80001c9088
	 sp = 0xffffff800000ba10  fp = 0xffffff800000ba90

vpanic() at panic+0x4c
	 pc = 0xffffff80001c9088  lr = 0xffffff80001c9118
	 sp = 0xffffff800000baa0  fp = 0xffffff800000bb20

panic() at cpu_initclocks_bsp+0x3b4
	 pc = 0xffffff80001c9118  lr = 0xffffff800045bff8
	 sp = 0xffffff800000bb30  fp = 0xffffff800000bb80

cpu_initclocks_bsp() at initclocks+0x28
	 pc = 0xffffff800045bff8  lr = 0xffffff8000171994
	 sp = 0xffffff800000bb90  fp = 0xffffff800000bb90

initclocks() at mi_startup+0x11c
	 pc = 0xffffff8000171994  lr = 0xffffff800016ea90
	 sp = 0xffffff800000bba0  fp = 0xffffff800000bbd0

mi_startup() at virtdone+0x5c
	 pc = 0xffffff800016ea90  lr = 0xffffff800000108c
	 sp = 0xffffff800000bbe0  fp = 0x0000000000000000

KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x40:
db> 