Petalinuxで作ったLinuxがZybo-Z7-10でブートしなかった

# 概要

petalinux 2020.2で作ったLinuxがZybo-Z7-10でブートしない現象が起きました。基本的に参考にしているサイト通りにやっているのですが、ブートの途中で`serverip not set`とかいうエラーでた後`Cannot autoload with TFTPGET`が出て止まってしまいました。結果的にはSDカードに`boot.scr`を追加するとブートできました。

# 開発環境

- Ubuntu 20.04
- Vivado 2020.2
- petalinux 2020.2
- zybo-z7-10

# エラー

SDカードに`BOOT.BIN`と`image.ub`を入れてブートした時に下のようなエラーが出ました。

```



U-Boot 2020.01 (Jan 01 2021 - 07:41:09 +0000)

CPU:   Zynq 7z010
Silicon: v3.1
DRAM:  ECC disabled 1 GiB
Flash: 0 Bytes
NAND:  0 MiB
MMC:   mmc@e0100000: 0
Loading Environment from SPI Flash... SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
*** Warning - bad CRC, using default environment

In:    serial@e0001000
Out:   serial@e0001000
Err:   serial@e0001000
Net:   
ZYNQ GEM: e000b000, mdio bus e000b000, phyaddr -1, interface rgmii-id

Warning: ethernet@e000b000 using MAC address from DT
eth0: ethernet@e000b000
Hit any key to stop autoboot:  2  1  0 
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
JTAG: Trying to boot script at 0x3000000
## Executing script at 03000000
Wrong image format for "source" command
JTAG: SCRIPT FAILED: continuing...
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
MMC Device 1 not found
no mmc device at slot 1
SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
device 0 offset 0xfc0000, size 0x40000
SF: 262144 bytes @ 0xfc0000 Read: OK
QSPI: Trying to boot script at 0x3000000
## Executing script at 03000000
Wrong image format for "source" command
QSPI: SCRIPT FAILED: continuing...


no devices available
NAND: SCRIPT FAILED: continuing...
NOR: Trying to boot script at 0x3000000
## Executing script at 03000000
Wrong image format for "source" command
NOR: SCRIPT FAILED: continuing...
starting USB...
Bus usb@e0002000: USB EHCI 1.00
scanning bus usb@e0002000 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found

Device 0: unknown device

Device 1: unknown device
ethernet@e000b000 Waiting for PHY auto negotiation to complete...... done
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
DHCP client bound to address 192.168.11.4 (1754 ms)
*** ERROR: `serverip' not set
Cannot autoload with TFTPGET
missing environment variable: pxeuuid
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/01-00-0a-35-00-1e-53
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C0A80B04
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C0A80B0
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C0A80B
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C0A80
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C0A8
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C0A
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C0
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/C
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/default-arm-zynq-zynq
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/default-arm-zynq
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/default-arm
*** ERROR: `serverip' not set
missing environment variable: bootfile
Retrieving file: pxelinux.cfg/default
*** ERROR: `serverip' not set
Config file not found
BOOTP broadcast 1
DHCP client bound to address 192.168.11.4 (2 ms)
*** ERROR: `serverip' not set
Cannot autoload with TFTPGET
BOOTP broadcast 1
DHCP client bound to address 192.168.11.4 (2 ms)
*** ERROR: `serverip' not set
Cannot autoload with TFTPGET
Zynq> 
```

# 解決策

公式ドキュメントのUG1144の49ページに`boot.scr`もSDカードに含める必要があるというような記述がありました。v2019.2にはなかったのですがv2020.1から記述が追加されていました。

![ug1144.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/271649/96b0b871-316e-201b-af2e-674d0a1e7403.png)
（https://japan.xilinx.com/support/documentation/sw_manuals_j/xilinx2020_2/ug1144-petalinux-tools-reference-guide.pdf より引用）

# 確認

`boot.scr`は`BOOT.BIN`と`image.ub`と同じディレクトリに作成されています。

```
$ ls images/linux/
BOOT.BIN  image.ub      rootfs.cpio     rootfs.cpio.gz.u-boot  rootfs.manifest  system.bit  u-boot.bin  uImage   zImage
boot.scr  pxelinux.cfg  rootfs.cpio.gz  rootfs.jffs2           rootfs.tar.gz    system.dtb  u-boot.elf  vmlinux  zynq_fsbl.elf
```

SDカードの中身を`BOOT.BIN`と`image.ub`と`boot.scr`の3つにしてもう一回ZYBOをブートすると無事起動してログインもできました。

```
U-Boot 2020.01 (Jan 01 2021 - 07:41:09 +0000)

CPU:   Zynq 7z010
Silicon: v3.1
DRAM:  ECC disabled 1 GiB
Flash: 0 Bytes
NAND:  0 MiB
MMC:   mmc@e0100000: 0
Loading Environment from SPI Flash... SF: Detected s25fl128s with page size 256 Bytes, erase size 64 KiB, total 16 MiB
*** Warning - bad CRC, using default environment

In:    serial@e0001000
Out:   serial@e0001000
Err:   serial@e0001000
Net:   
ZYNQ GEM: e000b000, mdio bus e000b000, phyaddr -1, interface rgmii-id

Warning: ethernet@e000b000 using MAC address from DT
eth0: ethernet@e000b000
Hit any key to stop autoboot:  2  1  0 
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
Found U-Boot script /boot.scr
2010 bytes read in 16 ms (122.1 KiB/s)
## Executing script at 03000000
11577312 bytes read in 653 ms (16.9 MiB/s)
## Loading kernel from FIT Image at 10000000 ...
   Using 'conf@system-top.dtb' configuration
   Verifying Hash Integrity ... OK
   Trying 'kernel@1' kernel subimage
     Description:  Linux kernel
     Type:         Kernel Image
     Compression:  uncompressed
     Data Start:   0x100000f8
     Data Size:    4325984 Bytes = 4.1 MiB
     Architecture: ARM
     OS:           Linux
     Load Address: 0x00200000
     Entry Point:  0x00200000
     Hash algo:    sha256
     Hash value:   a4e61bcb850bd5b3fb322a780247cfcfdd9c7a440dc51439cf8f108e791bdcd2
   Verifying Hash Integrity ... sha256+ OK
## Loading ramdisk from FIT Image at 10000000 ...
   Using 'conf@system-top.dtb' configuration
   Verifying Hash Integrity ... OK
   Trying 'ramdisk@1' ramdisk subimage
     Description:  petalinux-image-minimal
     Type:         RAMDisk Image
     Compression:  uncompressed
     Data Start:   0x104251f0
     Data Size:    7229561 Bytes = 6.9 MiB
     Architecture: ARM
     OS:           Linux
     Load Address: unavailable
     Entry Point:  unavailable
     Hash algo:    sha256
     Hash value:   f78602c5f573e2595ab594cbc970cc8409f9e15c72f3964e16a06ccaf6155a93
   Verifying Hash Integrity ... sha256+ OK
## Loading fdt from FIT Image at 10000000 ...
   Using 'conf@system-top.dtb' configuration
   Verifying Hash Integrity ... OK
   Trying 'fdt@system-top.dtb' fdt subimage
     Description:  Flattened Device Tree blob
     Type:         Flat Device Tree
     Compression:  uncompressed
     Data Start:   0x10420464
     Data Size:    19645 Bytes = 19.2 KiB
     Architecture: ARM
     Hash algo:    sha256
     Hash value:   adfa0ae3426c8533433cdea02a445c003094234ca23bfb8110877fcdfdd4d6d3
   Verifying Hash Integrity ... sha256+ OK
   Booting using the fdt blob at 0x10420464
   Loading Kernel Image
   Loading Ramdisk to 1f91a000, end 1ffff079 ... OK
   Loading Device Tree to 1f912000, end 1f919cbc ... OK

Starting kernel ...

Booting Linux on physical CPU 0x0
Linux version 5.4.0-xilinx-v2020.2 (oe-user@oe-host) (gcc version 9.2.0 (GCC)) #1 SMP PREEMPT Fri Jan 1 07:41:22 UTC 2021
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
OF: fdt: Machine model: xlnx,zynq-7000
earlycon: cdns0 at MMIO 0xe0001000 (options '115200n8')
printk: bootconsole [cdns0] enabled
Memory policy: Data cache writealloc
cma: Reserved 16 MiB at 0x3f000000
percpu: Embedded 15 pages/cpu s31948 r8192 d21300 u61440
Built 1 zonelists, mobility grouping on.  Total pages: 260416
Kernel command line: console=ttyPS0,115200 earlycon root=/dev/ram0 rw
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
mem auto-init: stack:off, heap alloc:off, heap free:off
Memory: 1003828K/1048576K available (6144K kernel code, 217K rwdata, 1844K rodata, 1024K init, 131K bss, 28364K reserved, 16384K cma-reserved, 245760K highmem)
rcu: Preemptible hierarchical RCU implementation.
rcu: 	RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
	Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
efuse mapped to (ptrval)
slcr mapped to (ptrval)
L2C: platform modifies aux control register: 0x72360000 -> 0x72760000
L2C: DT/platform modifies aux control register: 0x72360000 -> 0x72760000
L2C-310 erratum 769419 enabled
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 ID prefetch enabled, offset 1 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 8 ways, 512 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x76760001
random: get_random_bytes called from start_kernel+0x260/0x440 with crng_init=0
zynq_clock_init: clkc starts at (ptrval)
Zynq clock init
sched_clock: 64 bits at 333MHz, resolution 3ns, wraps every 4398046511103ns
clocksource: arm_global_timer: mask: 0xffffffffffffffff max_cycles: 0x4ce07af025, max_idle_ns: 440795209040 ns
Switching to timer-based delay loop, resolution 3ns
Console: colour dummy device 80x30
Calibrating delay loop (skipped), value calculated using timer frequency.. 666.66 BogoMIPS (lpj=3333333)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
CPU: Testing write buffer coherency: ok
CPU0: Spectre v2: using BPIALL workaround
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x100000 - 0x100060
rcu: Hierarchical SRCU implementation.
smp: Bringing up secondary CPUs ...
CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
CPU1: Spectre v2: using BPIALL workaround
smp: Brought up 1 node, 2 CPUs
SMP: Total of 2 processors activated (1333.33 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
futex hash table entries: 512 (order: 3, 32768 bytes, linear)
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor menu
hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 4 bytes.
zynq-ocm f800c000.ocmc: ZYNQ OCM pool: 256 KiB @ 0x(ptrval)
e0001000.serial: ttyPS0 at MMIO 0xe0001000 (irq = 24, base_baud = 6249999) is a xuartps
printk: console [ttyPS0] enabled
printk: console [ttyPS0] enabled
printk: bootconsole [cdns0] disabled
printk: bootconsole [cdns0] disabled
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
mc: Linux media interface: v0.10
videodev: Linux video capture interface: v2.00
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
FPGA manager framework
Advanced Linux Sound Architecture Driver Initialized.
clocksource: Switched to clocksource arm_global_timer
thermal_sys: Registered thermal governor 'step_wise'
NET: Registered protocol family 2
tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
TCP established hash table entries: 8192 (order: 3, 32768 bytes, linear)
TCP bind hash table entries: 8192 (order: 4, 65536 bytes, linear)
TCP: Hash tables configured (established 8192 bind 8192)
UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
PCI: CLS 0 bytes, default 64
Trying to unpack rootfs image as initramfs...
Freeing initrd memory: 7064K
hw perfevents: no interrupt-affinity property for /pmu@f8891000, guessing.
hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
workingset: timestamp_bits=14 max_order=18 bucket_order=4
jffs2: version 2.2. (NAND) (SUMMARY)  c 2001-2006 Red Hat, Inc.
bounce: pool size: 64 pages
io scheduler mq-deadline registered
io scheduler kyber registered
zynq-pinctrl 700.pinctrl: zynq pinctrl initialized
GPIO IRQ not connected
XGpio: gpio@41200000: registered, base is 1020
dma-pl330 f8003000.dmac: Loaded driver for PL330 DMAC-241330
dma-pl330 f8003000.dmac: 	DBUFF-128x8bytes Num_Chans-8 Num_Peri-4 Num_Events-16
brd: module loaded
loop: module loaded
spi_master spi0: cannot find modalias for /amba/spi@e000d000/flash@0
spi_master spi0: Failed to create SPI device for /amba/spi@e000d000/flash@0
libphy: Fixed MDIO Bus: probed
CAN device driver interface
libphy: MACB_mii_bus: probed
RTL8211E Gigabit Ethernet e000b000.ethernet-ffffffff:00: attached PHY driver [RTL8211E Gigabit Ethernet] (mii_bus:phy_addr=e000b000.ethernet-ffffffff:00, irq=POLL)
macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 26 (00:0a:35:00:1e:53)
e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-pci: EHCI PCI platform driver
usbcore: registered new interface driver usb-storage
i2c /dev entries driver
cdns-wdt f8005000.watchdog: Xilinx Watchdog Timer with timeout 10s
EDAC MC: ECC not enabled
Xilinx Zynq CpuIdle Driver started
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
mmc0: SDHCI controller on e0100000.mmc [e0100000.mmc] using ADMA
ledtrig-cpu: registered to indicate activity on CPUs
clocksource: ttc_clocksource: mask: 0xffff max_cycles: 0xffff, max_idle_ns: 537538477 ns
timer #0 at (ptrval), irq=39
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
fpga_manager fpga0: Xilinx Zynq FPGA Manager registered
NET: Registered protocol family 10
Segment Routing with IPv6
sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
NET: Registered protocol family 17
can: controller area network core (rev 20170425 abi 9)
NET: Registered protocol family 29
can: raw protocol (rev 20170425)
can: broadcast manager protocol (rev 20170425 t)
can: netlink gateway (rev 20190810) max_hops=1
Registering SWP/SWPB emulation handler
of-fpga-region fpga-full: FPGA Region probed
hctosys: unable to open rtc device (rtc0)
of_cfs_init
of_cfs_init: OK
ALSA device list:
  No soundcards found.
mmc0: new high speed SDHC card at address 1234
mmcblk0: mmc0:1234 SA32G 28.9 GiB 
Freeing unused kernel memory: 1024K
Run /init as init process
 mmcblk0: p1
INIT: version 2.88 booting
Starting udev
udevd[74]: starting version 3.2.8
random: udevd: uninitialized urandom read (16 bytes read)
random: udevd: uninitialized urandom read (16 bytes read)
random: udevd: uninitialized urandom read (16 bytes read)
udevd[75]: starting eudev-3.2.8
random: fast init done
FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
hwclock: can't open '/dev/misc/rtc': No such file or directory
Fri Jan  1 07:53:52 UTC 2021
hwclock: can't open '/dev/misc/rtc': No such file or directory
urandom_read: 2 callbacks suppressed
random: dd: uninitialized urandom read (512 bytes read)
Configuring packages on first boot....
 (This may take several minutes. Please do not power off the machine.)
Running postinst /etc/rpm-postinsts/100-sysvinit-inittab...
update-rc.d: /etc/init.d/run-postinsts exists during rc.d purge (continuing)
 Removing any system startup links for run-postinsts ...
  /etc/rcS.d/S99run-postinsts
INIT: Entering runlevel: 5
Configuring network interfaces... udhcpc: started, v1.31.0
udhcpc: sending discover
udhcpc: sending discover
macb e000b000.ethernet eth0: link up (1000/Full)
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
udhcpc: sending discover
udhcpc: sending select for 192.168.11.4
udhcpc: lease of 192.168.11.4 obtained, lease time 172800
/etc/udhcpc.d/50default: Adding DNS 192.168.11.1
done.
Starting haveged: haveged: listening socket at 3
haveged: haveged starting up


Starting Dropbear SSH server: random: dropbearkey: uninitialized urandom read (32 bytes read)
Generating 2048 bit rsa key, this may take a while...
random: dropbearkey: uninitialized urandom read (32 bytes read)
haveged: haveged: ver: 1.9.5; arch: generic; vend: ; build: (gcc 9.2.0 CTV); collect: 128K

haveged: haveged: cpu: (VC); data: 16K (D); inst: 16K (D); idx: 12/40; sz: 15006/57790

haveged: haveged: tot tests(BA8): A:1/1 B:1/1 continuous tests(B):  last entropy estimate 7.99973

haveged: haveged: fills: 0, generated: 0 

random: crng init done
Public key portion is:
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC4DUsGHtO2zrjFRL0kv/c5Bfe0GZDEoXoOfds0lpV+Y6D2JExCGG5EBQzDZ7OlMRPinPQA1Gw8w8MtEmqeU3AZ2W3ng7eZRdkHftBaufL+od0H63KHDqFHwsRFtCxvzd/2C7yf54w22sEyDo3vnN8NygwBKqpiJn3lgQyf1GBY9SZsewGjaKgKjIuLAFN92zAA6ZSvFD0Gv6lrhFfjWdsl0mcyfA0h6EjgKKzLlbSQojttf8qMfexIY8KaZYeNP9lXl6pZMKKBH5SbZRh8mxqyE4yRKRLLfJowGDmngsi/yw3dD2iruYXyd29v2fmXobi89W5cj2brjZ8n8GHzF4/L root@led
Fingerprint: sha1!! d5:a0:7a:55:b1:67:ea:39:41:dc:1b:af:f8:df:76:51:b2:cb:cd:4b
dropbear.
hwclock: can't open '/dev/misc/rtc': No such file or directory
Starting internet superserver: inetd.
Starting syslogd/klogd: done
Starting tcf-agent: OK

PetaLinux 2020.2 led /dev/ttyPS0

led login: root
Password: 
root@led:~# 
```


# 参考サイト

このサイトを参考にしています
[PetaLinuxでLチカやってみる ZYBO Z7-10](https://yoheikoga.github.io/2017/12/26/petalinux-led-blink-test/)

公式ドキュメント
[Petalinux Tools Documentation Reference Guide UG1144](https://japan.xilinx.com/support/documentation/sw_manuals_j/xilinx2020_2/ug1144-petalinux-tools-reference-guide.pdf)