u-boot and ubldr on arm64

Adrian Chadd adrian.chadd at gmail.com
Fri Dec 18 23:24:52 UTC 2015 

hey cool!

Can you post your patches to freebsd and uboot? Let's get them
somewhere reviewed!


-a


On 18 December 2015 at 10:18, Thomas Skibo via freebsd-arm
<freebsd-arm at freebsd.org> wrote:
>
> 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>
>
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