関連記事
EBAZ4205を使って、FPGAを使ったシステム開発の環境を構築する
EBAZ4205でLinuxを動かして見る
petalinuxをBuildrootでビルドする
はじめに
Zinqを使ったボードでNervesを動作させる事を目指しています。
その前段階として、petalinuxをbuildrootでビルドする方法を調査し、作成できるか試してみます。
使用するハードウエア
Zinqの評価boardを使うのがお手軽ですが、今回は次の理由から、ebaz4205を使う事にします。
- ebaz4205は、マイニングマシーンに使われていたコントローラの中古販売品で価格が安い。
- 必要最低限のハードウエアで、自身でハードウエアを作る場合もほぼ同等の構成になりそう。
- 評価boardと違い、開発環境が整ってないので、大変だが、開発に必要な事を一通り経験できる
参考サイト
petalinuxについては、この記事で、実際に動作する事を確認しました。
Nervesを動作させるためには、buildrootでビルドする必要があるので、petalinuxをbuildrootでビルドしている事例がないか調査しました。
以下のコンテンツが見つかりました。
これを参考に、ebaz4205をbuildrootでビルドする事を試みます。
dtsファイル
Linuxからみたハードウエアの情報は、dtsファイルに記述されています。
本来は、FPGAの中身を開発した上で、dtsファイルを作成する必要がありますが、ebaz4205_buildrootで使われているdtsファイルを使って、buildrootの構築方法を習得する事にします。
petalinuxのビルドした結果にsystem.dtbは作成されていました。
このあたりの成果物から、ebaz4205_buildrootのdtsファイルを作成する事ができるのではないかと想定しています。
今後の課題です。
ビルド手順
cd /home/masa/ebaz4205
git clone https://github.com/buildroot/buildroot.git
git clone https://github.com/embed-me/ebaz4205_buildroot
cd buildroot/
make BR2_EXTERNAL=../ebaz4205_buildroot zynq_ebaz4205_defconfig
make 2>&1 | tee build.log
この手順でbuildしてみましたが、カーネルのコンパイル過程でエラーが発生しました。
どうやら、ebaz4205_buildrootが想定しているbuildrootが古く、最新のbuildrootとは合わないようです。
設定ファイルの修正
zynq_ebaz4205_defconfigのKernelの設定では、4.19を指定しています。これはいかにも古そうです。
zynq_ebaz4205_defconfig
BR2_LINUX_KERNEL_VERSION="4.19"
BR2_LINUX_KERNEL_CUSTOM_VERSION=y
BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19"
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
できるだけ、公式（Xilinx）のリポジトリを使うようにしたいです。次のように修正してみました。
zynq_ebaz4205_defconfig
BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/Xilinx/linux-xlnx.git"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="xlnx_rebase_v5.15_LTS"
U-bootも独自のものを使用しているようです。
BR2_TARGET_UBOOT_CUSTOM_REPO_URL="https://github.com/embed-me/u-boot.git"
これもpetalinuxのビルドと同じものを使うように修正したいですが、今回はこのままで進めます。今後の課題とします。
修正後のzyng_ebaz4205_defconfigは次のようになりました。
zynq_ebaz4205_defconfig
BR2_arm=y
BR2_cortex_a9=y
BR2_ARM_ENABLE_NEON=y
BR2_ARM_ENABLE_VFP=y
BR2_TARGET_GENERIC_GETTY_PORT="ttyPS0"
BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_EMBEDME_EBAZ4205_PATH)/ebaz4205/fs-overlay"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/Xilinx/linux-xlnx.git"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="xlnx_rebase_v5.15_LTS"
BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
BR2_LINUX_KERNEL_UIMAGE=y
BR2_LINUX_KERNEL_UIMAGE_LOADADDR="0x8000"
BR2_LINUX_KERNEL_DTS_SUPPORT=y
BR2_LINUX_KERNEL_USE_CUSTOM_DTS=y
BR2_LINUX_KERNEL_CUSTOM_DTS_PATH="$(BR2_EXTERNAL_EMBEDME_EBAZ4205_PATH)/ebaz4205/dts/ebaz4205-zynq7.dts $(BR2_EXTERNAL_EMBEDME_EBAZ4205_PATH)/ebaz4205/dts/ebaz4205-board.dtsi $(BR2_EXTERNAL_EMBEDME_EBAZ4205_PATH)/ebaz4205/dts/ebaz4205-pl.dtsi"
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_EMBEDME_EBAZ4205_PATH)/ebaz4205/linux/linux.config"
BR2_TARGET_ROOTFS_CPIO=y
BR2_TARGET_ROOTFS_CPIO_GZIP=y
BR2_TARGET_ROOTFS_CPIO_UIMAGE=y
BR2_TARGET_UBOOT=y
BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
BR2_TARGET_UBOOT_CUSTOM_GIT=y
BR2_TARGET_UBOOT_CUSTOM_REPO_URL="https://github.com/embed-me/u-boot.git"
BR2_TARGET_UBOOT_CUSTOM_REPO_VERSION="v2019.07-ebaz4205"
BR2_TARGET_UBOOT_BOARD_DEFCONFIG="zynq_ebaz4205"
BR2_TARGET_UBOOT_NEEDS_DTC=y
BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
BR2_TARGET_UBOOT_FORMAT_IMG=y
BR2_TARGET_UBOOT_SPL=y
BR2_TARGET_UBOOT_SPL_NAME="spl/boot.bin"
BR2_PACKAGE_HOST_DOSFSTOOLS=y
BR2_PACKAGE_HOST_GENIMAGE=y
BR2_PACKAGE_HOST_MTOOLS=y
BR2_TARGET_GENERIC_ROOT_PASSWD="root"
BR2_TARGET_GENERIC_HOSTNAME="ebaz4205"
BR2_PACKAGE_LINUX_TOOLS_GPIO=y
BR2_PACKAGE_MTD=y
BR2_PACKAGE_MTD_MKFSUBIFS=y
BR2_PACKAGE_STRACE=y
BR2_PACKAGE_COREUTILS=y
BR2_PACKAGE_DROPBEAR=y
ビルド再開
この修正によりビルド成功しました。
ebaz4205_buildrootの説明に従って、FATでフォーマットしたSDカードに、成果物をコピーして、ebaz4205に挿入して起動してみました。
次のような結果でした。
U-Boot SPL 2019.07 (Nov 26 2024 - 06:11:10 +0900)
mmc boot
Trying to boot from MMC1
spl_load_image_fat_os: error reading image system.dtb, err - -2
U-Boot 2019.07 (Nov 26 2024 - 06:11:10 +0900)
CPU: Zynq 7z010
Silicon: v3.1
DRAM: ECC disabled 256 MiB
MMC: mmc@e0100000: 0
Loading Environment from SPI Flash... Invalid bus 0 (err=-19)
*** Warning - spi_flash_probe_bus_cs() failed, using default environment
In: serial@e0001000
Out: serial@e0001000
Err: serial@e0001000
Net: ZYNQ GEM: e000b000, phyaddr 0, interface rgmii-id
Warning: ethernet@e000b000 (eth0) using random MAC address - 02:ef:31:36:51:ea
eth0: ethernet@e000b000
Hit any key to stop autoboot: 0
gpio: pin 20 (gpio 20) value is 0
Device: mmc@e0100000
Manufacturer ID: 2
OEM: 544d
Name: SA16G
Bus Speed: 20000000
Mode: SD High Speed (50MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.4 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
gpio: pin 54 (gpio 54) value is 0
gpio: pin 55 (gpio 55) value is 0
Copying Linux from SD to RAM...
10760768 bytes read in 1152 ms (8.9 MiB/s)
11520 bytes read in 17 ms (661.1 KiB/s)
Handoff to Linux kernel...
## Booting kernel from Legacy Image at 02080000 ...
Image Name: Linux-6.11.10
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 10760704 Bytes = 10.3 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
Wrong Ramdisk Image Format
Ramdisk image is corrupt or invalid
## Error: "bootcmd_mmc" not defined
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
Invalid bus 0 (err=-19)
Failed to initialize SPI flash at 0:0 (error -19)
SCRIPT FAILED: continuing...
starting USB...
No working controllers found
USB is stopped. Please issue 'usb start' first.
starting USB...
No working controllers found
ethernet@e000b000 Waiting for PHY auto negotiation to complete......... TIMEOUT !
missing environment variable: pxefile_addr_r
starting USB...
No working controllers found
ethernet@e000b000 Waiting for PHY auto negotiation to complete......... TIMEOUT !
ethernet@e000b000 Waiting for PHY auto negotiation to complete......... TIMEOUT !
Device: mmc@e0100000
Manufacturer ID: 2
OEM: 544d
Name: SA16G
Bus Speed: 20000000
Mode: SD High Speed (50MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.4 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
gpio: pin 54 (gpio 54) value is 0
gpio: pin 55 (gpio 55) value is 0
Copying Linux from SD to RAM...
10760768 bytes read in 1152 ms (8.9 MiB/s)
11520 bytes read in 17 ms (661.1 KiB/s)
Handoff to Linux kernel...
## Booting kernel from Legacy Image at 02080000 ...
Image Name: Linux-6.11.10
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 10760704 Bytes = 10.3 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
Wrong Ramdisk Image Format
Ramdisk image is corrupt or invalid
動作はしてますが、ramdisk imageが不正となっています。なにかうまく行ってないようです。
U-bootの環境変数を確認してみます。
U-bootの環境変数
ebaz4205> printenv
arch=arm
baudrate=115200
bitstream_image=download-ebaz4205-zynq7.bit
bitstream_load_address=0x100000
board=ebaz4205
board_name=ebaz4205
boot_a_script=load ${devtype} ${devnum}:${distro_bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr}
boot_efi_binary=if fdt addr ${fdt_addr_r}; then bootefi bootmgr ${fdt_addr_r};else bootefi bootmgr ${fdtcontroladdr};fi;load ${devtype} ${devnum}:${distro_bootpart} ${kernel_addr_r} efi/boot/bootarm.efi; if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r};else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi
boot_extlinux=sysboot ${devtype} ${devnum}:${distro_bootpart} any ${scriptaddr} ${prefix}${boot_syslinux_conf}
boot_net_usb_start=usb start
boot_prefixes=/ /boot/
boot_script_dhcp=boot.scr.uimg
boot_scripts=boot.scr.uimg boot.scr
boot_syslinux_conf=extlinux/extlinux.conf
boot_targets=mmc mmc0 qspi usb0 pxe dhcp xilinx
bootcmd=if run s2_button_pressed_test; then run $modeboot || run distro_bootcmd;else echo Abort boot...;fi;
bootcmd_dhcp=run boot_net_usb_start; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi;setenv efi_fdtfile ${fdtfile}; if test -z "${fdtfile}" -a -n "${soc}"; then setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; fi; setenv efi_old_vci ${bootp_vci};setenv efi_old_arch ${bootp_arch};setenv bootp_vci PXEClient:Arch:00010:UNDI:003000;setenv bootp_arch 0xa;if dhcp ${kernel_addr_r}; then tftpboot ${fdt_addr_r} dtb/${efi_fdtfile};if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r}; else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi;fi;setenv bootp_vci ${efi_old_vci};setenv bootp_arch ${efi_old_arch};setenv efi_fdtfile;setenv efi_old_arch;setenv efi_old_vci;
bootcmd_mmc0=devnum=0; run mmc_boot
bootcmd_pxe=run boot_net_usb_start; dhcp; if pxe get; then pxe boot; fi
bootcmd_qspi=sf probe 0 0 0 && sf read $scriptaddr $script_offset_f $script_size_f && source ${scriptaddr}; echo SCRIPT FAILED: continuing...;
bootcmd_usb0=devnum=0; run usb_boot
bootcmd_xilinx=run $modeboot
bootdelay=0
bootenv=uEnv.txt
bootfstype=fat
cpu=armv7
devicetree_image=ebaz4205-zynq7.dtb
devicetree_load_address=0x2000000
devicetree_size=0x20000
dfu_mmc=run dfu_mmc_info && dfu 0 mmc 0
dfu_mmc_info=setenv dfu_alt_info ${kernel_image} fat 0 1\\;${devicetree_image} fat 0 1\\;${ramdisk_image} fat 0 1
dfu_ram=run dfu_ram_info && dfu 0 ram 0
dfu_ram_info=setenv dfu_alt_info ${kernel_image} ram 0x3000000 0x500000\\;${devicetree_image} ram 0x2A00000 0x20000\\;${ramdisk_image} ram 0x2000000 0x600000
distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
efi_dtb_prefixes=/ /dtb/ /dtb/current/
ethact=ethernet@e000b000
fdtcontroladdr=ffd1e60
fileaddr=2000000
filesize=2d00
fpga_config=fpga load 0 ${bitstream_load_address} ${filesize}
importbootenv=echo Importing environment from SD ...; env import -t ${loadbootenv_addr} $filesize
jtagboot=echo TFTPing Linux to RAM... && tftpboot ${kernel_load_address} ${kernel_image} && tftpboot ${devicetree_load_address} ${devicetree_image} && tftpboot ${ramdisk_load_address} ${ramdisk_image} && bootm ${kernel_load_address} ${ramdisk_load_address} ${devicetree_load_address}
kernel_image=uImage
kernel_load_address=0x2080000
kernel_size=0x500000
leds_bootstate_0=gpio clear 54; gpio clear 55;
leds_bootstate_1=gpio clear 54; gpio set 55;
leds_bootstate_2=gpio set 54; gpio clear 55;
leds_bootstate_3=gpio set 54; gpio set 55;
load_efi_dtb=load ${devtype} ${devnum}:${distro_bootpart} ${fdt_addr_r} ${prefix}${efi_fdtfile}
loadbootenv=load mmc 0 ${loadbootenv_addr} ${bootenv}
loadbootenv_addr=0x2000000
mmc_boot=if mmc dev ${devnum}; then devtype=mmc; run scan_dev_for_boot_part; fi
mmc_loaddtb=load mmc 0 ${devicetree_load_address} ${devicetree_image}
mmc_loadfpga=load mmc 0 ${bitstream_load_address} ${bitstream_image}
mmc_loadkernel=load mmc 0 ${kernel_load_address} ${kernel_image}
mmc_loadramdisk=load mmc 0 ${ramdisk_load_address} ${ramdisk_image}
modeboot=sdboot
nandboot=echo Copying Linux from NAND flash to RAM... && nand read ${kernel_load_address} 0x100000 ${kernel_size} && nand read ${devicetree_load_address} 0x600000 ${devicetree_size} && echo Copying ramdisk... && nand read ${ramdisk_load_address} 0x620000 ${ramdisk_size} && bootm ${kernel_load_address} ${ramdisk_load_address} ${devicetree_load_address}
norboot=echo Copying Linux from NOR flash to RAM... && cp.b 0xE2100000 ${kernel_load_address} ${kernel_size} && cp.b 0xE2600000 ${devicetree_load_address} ${devicetree_size} && echo Copying ramdisk... && cp.b 0xE2620000 ${ramdisk_load_address} ${ramdisk_size} && bootm ${kernel_load_address} ${ramdisk_load_address} ${devicetree_load_address}
preboot=if test $modeboot = sdboot && env run sd_uEnvtxt_existence_test; then if env run loadbootenv; then env run importbootenv; fi; fi;
qspiboot=echo Copying Linux from QSPI flash to RAM... && sf probe 0 0 0 && sf read ${kernel_load_address} 0x100000 ${kernel_size} && sf read ${devicetree_load_address} 0x600000 ${devicetree_size} && echo Copying ramdisk... && sf read ${ramdisk_load_address} 0x620000 ${ramdisk_size} && bootm ${kernel_load_address} ${ramdisk_load_address} ${devicetree_load_address}
ramdisk_image=ebaz4205-image-minimal-ebaz4205-zynq7.cpio.gz.u-boot
ramdisk_load_address=0x4000000
ramdisk_size=0x5E0000
s2_button_pressed_test=gpio input 20;
scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done;run scan_dev_for_efi;
scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devnum}:${distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done; setenv devplist
scan_dev_for_efi=setenv efi_fdtfile ${fdtfile}; if test -z "${fdtfile}" -a -n "${soc}"; then setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; fi; for prefix in ${efi_dtb_prefixes}; do if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${efi_fdtfile}; then run load_efi_dtb; fi;done;if test -e ${devtype} ${devnum}:${distro_bootpart} efi/boot/bootarm.efi; then echo Found EFI removable media binary efi/boot/bootarm.efi; run boot_efi_binary; echo EFI LOAD FAILED: continuing...; fi; setenv efi_fdtfile
scan_dev_for_extlinux=if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${boot_syslinux_conf}; then echo Found ${prefix}${boot_syslinux_conf}; run boot_extlinux; echo SCRIPT FAILED: continuing...; fi
scan_dev_for_scripts=for script in ${boot_scripts}; do if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${script}; then echo Found U-Boot script ${prefix}${script}; run boot_a_script; echo SCRIPT FAILED: continuing...; fi; done
sd_uEnvtxt_existence_test=test -e mmc 0 /uEnv.txt
sdboot=if mmcinfo; then run leds_bootstate_0;run uenvboot;echo Copying Linux from SD to RAM...;run mmc_loadkernel && run mmc_loaddtb && run mmc_loadramdisk && run leds_bootstate_2;echo Handoff to Linux kernel...;bootm ${kernel_load_address} ${ramdisk_load_address} ${devicetree_load_address}; fi
soc=zynq
stderr=serial@e0001000
stdin=serial@e0001000
stdout=serial@e0001000
thor_mmc=run dfu_mmc_info && thordown 0 mmc 0
thor_ram=run dfu_ram_info && thordown 0 ram 0
uenvboot=if run loadbootenv; then echo Loaded environment from ${bootenv}; run importbootenv; fi; if test -n $uenvcmd; then echo Running uenvcmd ...; run uenvcmd; fi
usb_boot=usb start; if usb dev ${devnum}; then devtype=usb; run scan_dev_for_boot_part; fi
vendor=embedme
Environment size: 7530/131068 bytes
この内容をChatGPTに与えて内容を解析してみましたが、あまり役に立つ情報は得られませんでした。
手動で起動する方法を、ChatGPTに生成してもらって試して見ます。
ebaz4205> setenv ramdisk_image rootfs.cpio.gz
ebaz4205> run sdboot
Device: mmc@e0100000
Manufacturer ID: 2
OEM: 544d
Name: SA16G
Bus Speed: 20000000
Mode: SD High Speed (50MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.4 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
gpio: pin 54 (gpio 54) value is 0
gpio: pin 55 (gpio 55) value is 0
Copying Linux from SD to RAM...
10760768 bytes read in 1153 ms (8.9 MiB/s)
11520 bytes read in 17 ms (661.1 KiB/s)
9637780 bytes read in 1035 ms (8.9 MiB/s)
gpio: pin 54 (gpio 54) value is 1
Warning: value of pin is still 0
gpio: pin 55 (gpio 55) value is 0
Handoff to Linux kernel...
## Booting kernel from Legacy Image at 02080000 ...
Image Name: Linux-6.11.10
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 10760704 Bytes = 10.3 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
Wrong Ramdisk Image Format
Ramdisk image is corrupt or invalid
rootfsとして、rootfs.cpioも生成されてたので、これにしてみます。
ebaz4205> setenv ramdisk_image rootfs.cpio
ebaz4205> run sdboot
Device: mmc@e0100000
Manufacturer ID: 2
OEM: 544d
Name: SA16G
Bus Speed: 20000000
Mode: SD High Speed (50MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.4 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
gpio: pin 54 (gpio 54) value is 0
gpio: pin 55 (gpio 55) value is 0
Copying Linux from SD to RAM...
10760768 bytes read in 1152 ms (8.9 MiB/s)
11520 bytes read in 17 ms (661.1 KiB/s)
26316288 bytes read in 2793 ms (9 MiB/s)
gpio: pin 54 (gpio 54) value is 1
Warning: value of pin is still 0
gpio: pin 55 (gpio 55) value is 0
Handoff to Linux kernel...
## Booting kernel from Legacy Image at 02080000 ...
Image Name: Linux-6.11.10
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 10760704 Bytes = 10.3 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
Wrong Ramdisk Image Format
Ramdisk image is corrupt or invalid
同じ結果でした。
setenv ramdisk_image rootfs.tarもやってみたけど同じ。
一端、rootfsの事は保留して、カーネルのみを起動してみます。
U-bootのプロンプトから手動でカーネルを起動してみる
カーネル起動時のログ
ebaz4205> setenv kernel_image uImage
ebaz4205> setenv devicetree_image ebaz4205-zynq7.dtb
ebaz4205> setenv ramdisk_image rootfs.cpio.gz
ebaz4205> setenv bootargs console=ttyPS0,115200 root=/dev/ram rw earlyprintk
ebaz4205> mmc rescan
ebaz4205> fatload mmc 0 ${kernel_load_address} ${kernel_image}
10760768 bytes read in 1152 ms (8.9 MiB/s)
ebaz4205> fatload mmc 0 ${devicetree_load_address} ${devicetree_image}
11520 bytes read in 17 ms (661.1 KiB/s)
ebaz4205> fatload mmc 0 ${ramdisk_load_address} ${ramdisk_image}
9637780 bytes read in 1035 ms (8.9 MiB/s)
ebaz4205> bootm ${kernel_load_address} - ${devicetree_load_address}
## Booting kernel from Legacy Image at 02080000 ...
Image Name: Linux-6.11.10
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 10760704 Bytes = 10.3 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
## Flattened Device Tree blob at 02000000
Booting using the fdt blob at 0x2000000
Loading Kernel Image ... OK
Loading Device Tree to 0eb33000, end 0eb38cff ... OK
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 6.11.10 (masa@wsl-elixir) (arm-buildroot-linux-gnueabihf-gcc.br_real (Buildroot 2024.11-rc2-6-ged590a22e2) 13.3.0, GNU ld (GNU Binutils) 2.42) #1 SMP Tue Nov 26 13:07:02 JST 2024
[ 0.000000] CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] OF: fdt: Machine model: xlnx,zynq-7000
[ 0.000000] Memory policy: Data cache writealloc
[ 0.000000] efi: UEFI not found.
[ 0.000000] cma: Reserved 64 MiB at 0x0a800000 on node -1
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Normal empty
[ 0.000000] HighMem empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] percpu: Embedded 17 pages/cpu s40076 r8192 d21364 u69632
[ 0.000000] Kernel command line: console=ttyPS0,115200 root=/dev/ram rw earlyprintk
[ 0.000000] Unknown kernel command line parameters "earlyprintk", will be passed to user space.
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 65536
[ 0.000000] mem auto-init: stack:all(zero), heap alloc:off, heap free:off
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[ 0.000000] trace event string verifier disabled
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] rcu: RCU event tracing is enabled.
[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=2.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] slcr mapped to (ptrval)
[ 0.000000] L2C: platform modifies aux control register: 0x02060000 -> 0x02460000
[ 0.000000] L2C: DT/platform modifies aux control register: 0x02060000 -> 0x02460000
[ 0.000000] L2C-310 erratum 769419 enabled
[ 0.000000] L2C-310 enabling early BRESP for Cortex-A9
[ 0.000000] L2C-310 full line of zeros enabled for Cortex-A9
[ 0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[ 0.000000] L2C-310 cache controller enabled, 8 ways, 512 kB
[ 0.000000] L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x46460001
[ 0.000000] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 0.000000] zynq_clock_init: clkc starts at (ptrval)
[ 0.000000] Zynq clock init
[ 0.000000] ps_clk frequency not specified, using 33 MHz.
[ 0.000002] sched_clock: 64 bits at 167MHz, resolution 6ns, wraps every 4398046511103ns
[ 0.000025] clocksource: arm_global_timer: mask: 0xffffffffffffffff max_cycles: 0x26703d7dd8, max_idle_ns: 440795208065 ns
[ 0.000058] Switching to timer-based delay loop, resolution 6ns
[ 0.001083] Console: colour dummy device 80x30
[ 0.001134] Calibrating delay loop (skipped), value calculated using timer frequency.. 333.33 BogoMIPS (lpj=1666666)
[ 0.001153] CPU: Testing write buffer coherency: ok
[ 0.001189] CPU0: Spectre v2: using BPIALL workaround
[ 0.001199] pid_max: default: 32768 minimum: 301
[ 0.001348] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.001365] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.002194] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[ 0.003282] Setting up static identity map for 0x300000 - 0x3000ac
[ 0.003983] rcu: Hierarchical SRCU implementation.
[ 0.003993] rcu: Max phase no-delay instances is 1000.
[ 0.004316] Timer migration: 1 hierarchy levels; 8 children per group; 1 crossnode level
[ 0.005547] EFI services will not be available.
[ 0.005763] smp: Bringing up secondary CPUs ...
[ 0.006670] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[ 0.006694] CPU1: Spectre v2: using BPIALL workaround
[ 0.006863] smp: Brought up 1 node, 2 CPUs
[ 0.006878] SMP: Total of 2 processors activated (666.66 BogoMIPS).
[ 0.006891] CPU: All CPU(s) started in SVC mode.
[ 0.007304] Memory: 164852K/262144K available (15360K kernel code, 2274K rwdata, 6164K rodata, 2048K init, 412K bss, 30380K reserved, 65536K cma-reserved, 0K highmem)
[ 0.007760] devtmpfs: initialized
[ 0.011236] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[ 0.011511] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.011536] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
[ 0.015260] pinctrl core: initialized pinctrl subsystem
[ 0.017053] DMI not present or invalid.
[ 0.017874] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 0.021264] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.023455] thermal_sys: Registered thermal governor 'step_wise'
[ 0.023530] cpuidle: using governor menu
[ 0.027615] platform axi: Fixed dependency cycle(s) with /axi/interrupt-controller@f8f01000
[ 0.032261] platform replicator: Fixed dependency cycle(s) with /axi/etb@f8801000
[ 0.032365] amba f8801000.etb: Fixed dependency cycle(s) with /replicator
[ 0.032612] platform replicator: Fixed dependency cycle(s) with /axi/tpiu@f8803000
[ 0.032708] amba f8803000.tpiu: Fixed dependency cycle(s) with /replicator
[ 0.032969] platform replicator: Fixed dependency cycle(s) with /axi/funnel@f8804000
[ 0.033064] amba f8804000.funnel: Fixed dependency cycle(s) with /axi/ptm@f889d000
[ 0.033088] amba f8804000.funnel: Fixed dependency cycle(s) with /axi/ptm@f889c000
[ 0.033108] amba f8804000.funnel: Fixed dependency cycle(s) with /replicator
[ 0.033352] amba f8804000.funnel: Fixed dependency cycle(s) with /axi/ptm@f889c000
[ 0.033451] amba f889c000.ptm: Fixed dependency cycle(s) with /axi/funnel@f8804000
[ 0.033702] amba f8804000.funnel: Fixed dependency cycle(s) with /axi/ptm@f889d000
[ 0.033792] amba f889d000.ptm: Fixed dependency cycle(s) with /axi/funnel@f8804000
[ 0.034737] No ATAGs?
[ 0.034838] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
[ 0.034852] hw-breakpoint: maximum watchpoint size is 4 bytes.
[ 0.038036] Serial: AMBA PL011 UART driver
[ 0.038856] e0001000.serial: ttyPS0 at MMIO 0xe0001000 (irq = 26, base_baud = 6249999) is a xuartps
[ 0.038941] printk: legacy console [ttyPS0] enabled
[ 0.653658] iommu: Default domain type: Translated
[ 0.658450] iommu: DMA domain TLB invalidation policy: strict mode
[ 0.666194] SCSI subsystem initialized
[ 0.670508] usbcore: registered new interface driver usbfs
[ 0.676027] usbcore: registered new interface driver hub
[ 0.681407] usbcore: registered new device driver usb
[ 0.687198] pps_core: LinuxPPS API ver. 1 registered
[ 0.692194] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.701351] PTP clock support registered
[ 0.705432] EDAC MC: Ver: 3.0.0
[ 0.712422] vgaarb: loaded
[ 0.716353] clocksource: Switched to clocksource arm_global_timer
[ 0.753026] NET: Registered PF_INET protocol family
[ 0.758117] IP idents hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.766251] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
[ 0.774657] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 0.782428] TCP established hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.790104] TCP bind hash table entries: 2048 (order: 3, 32768 bytes, linear)
[ 0.797315] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.803749] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.810319] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.817431] NET: Registered PF_UNIX/PF_LOCAL protocol family
[ 0.830594] RPC: Registered named UNIX socket transport module.
[ 0.836521] RPC: Registered udp transport module.
[ 0.841240] RPC: Registered tcp transport module.
[ 0.845937] RPC: Registered tcp-with-tls transport module.
[ 0.851431] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.857872] PCI: CLS 0 bytes, default 64
[ 0.863023] Initialise system trusted keyrings
[ 0.867810] workingset: timestamp_bits=30 max_order=16 bucket_order=0
[ 0.874652] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.881090] NFS: Registering the id_resolver key type
[ 0.886174] Key type id_resolver registered
[ 0.890392] Key type id_legacy registered
[ 0.894591] Key type asymmetric registered
[ 0.898689] Asymmetric key parser 'x509' registered
[ 0.903641] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247)
[ 0.911046] io scheduler mq-deadline registered
[ 0.915570] io scheduler kyber registered
[ 0.934362] zynq-pinctrl 700.pinctrl: zynq pinctrl initialized
[ 0.961558] dma-pl330 f8003000.dma-controller: Loaded driver for PL330 DMAC-241330
[ 0.969136] dma-pl330 f8003000.dma-controller: DBUFF-128x8bytes Num_Chans-8 Num_Peri-4 Num_Events-16
[ 1.049184] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 1.059398] msm_serial: driver initialized
[ 1.063825] SuperH (H)SCI(F) driver initialized
[ 1.068541] STMicroelectronics ASC driver initialized
[ 1.089265] brd: module loaded
[ 1.098867] loop: module loaded
[ 1.111308] CAN device driver interface
[ 2.331162] macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 37 (02:ef:31:36:51:ea)
[ 2.341313] bgmac_bcma: Broadcom 47xx GBit MAC driver loaded
[ 2.347890] e1000e: Intel(R) PRO/1000 Network Driver
[ 2.352893] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 2.358852] igb: Intel(R) Gigabit Ethernet Network Driver
[ 2.364261] igb: Copyright (c) 2007-2014 Intel Corporation.
[ 2.372530] pegasus: Pegasus/Pegasus II USB Ethernet driver
[ 2.378144] usbcore: registered new interface driver pegasus
[ 2.383856] usbcore: registered new interface driver asix
[ 2.389282] usbcore: registered new interface driver ax88179_178a
[ 2.395429] usbcore: registered new interface driver cdc_ether
[ 2.401302] usbcore: registered new interface driver smsc75xx
[ 2.407076] usbcore: registered new interface driver smsc95xx
[ 2.412877] usbcore: registered new interface driver net1080
[ 2.418562] usbcore: registered new interface driver cdc_subset
[ 2.424522] usbcore: registered new interface driver zaurus
[ 2.430123] usbcore: registered new interface driver cdc_ncm
[ 2.439005] usbcore: registered new interface driver usb-storage
[ 2.447058] input: buttons as /devices/soc0/buttons/input/input0
[ 2.456053] i2c_dev: i2c /dev entries driver
[ 2.468437] cpufreq: cpufreq_online: CPU0: Running at unlisted initial frequency: 666666 KHz, changing to: 666667 KHz
[ 2.479851] Xilinx Zynq CpuIdle Driver started
[ 2.485060] sdhci: Secure Digital Host Controller Interface driver
[ 2.491263] sdhci: Copyright(c) Pierre Ossman
[ 2.496876] Synopsys Designware Multimedia Card Interface Driver
[ 2.503936] sdhci-pltfm: SDHCI platform and OF driver helper
[ 2.514335] ledtrig-cpu: registered to indicate activity on CPUs
[ 2.521279] clocksource: ttc_clocksource: mask: 0xffff max_cycles: 0xffff, max_idle_ns: 537538477 ns
[ 2.530527] timer #0 at (ptrval), irq=39
[ 2.534787] usbcore: registered new interface driver usbhid
[ 2.540384] usbhid: USB HID core driver
[ 2.542818] mmc0: SDHCI controller on e0100000.mmc [e0100000.mmc] using ADMA
[ 2.553081] armv7-pmu f8891000.pmu: hw perfevents: no interrupt-affinity property, guessing.
[ 2.561904] hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
[ 2.571214] NET: Registered PF_INET6 protocol family
[ 2.577776] Segment Routing with IPv6
[ 2.581519] In-situ OAM (IOAM) with IPv6
[ 2.585533] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 2.588327] mmc0: new high speed SDHC card at address 1234
[ 2.592212] NET: Registered PF_PACKET protocol family
[ 2.597610] mmcblk0: mmc0:1234 SA16G 14.4 GiB
[ 2.602008] can: controller area network core
[ 2.609437] mmcblk0: p1 p2
[ 2.610807] NET: Registered PF_CAN protocol family
[ 2.618379] can: raw protocol
[ 2.621355] can: broadcast manager protocol
[ 2.625540] can: netlink gateway - max_hops=1
[ 2.630430] Key type dns_resolver registered
[ 2.635009] ThumbEE CPU extension supported.
[ 2.639347] Registering SWP/SWPB emulation handler
[ 2.656179] Loading compiled-in X.509 certificates
[ 2.677696] clk: Disabling unused clocks
[ 2.681712] PM: genpd: Disabling unused power domains
[ 2.688272] ntfs3: ram0: Primary boot signature is not NTFS.
[ 2.693951] ntfs3: ram0: try to read out of volume at offset 0x3fffe00
[ 2.700752] ntfs3: ram0: Primary boot signature is not NTFS.
[ 2.706472] ntfs3: ram0: try to read out of volume at offset 0x3fffe00
[ 2.713728] ntfs3: ram0: Primary boot signature is not NTFS.
[ 2.719427] ntfs3: ram0: try to read out of volume at offset 0x3fffe00
[ 2.726046] ntfs3: ram0: Primary boot signature is not NTFS.
[ 2.731749] ntfs3: ram0: try to read out of volume at offset 0x3fffe00
[ 2.738313] List of all partitions:
[ 2.741805] 0100 65536 ram0
[ 2.741815] (driver?)
[ 2.747946] 0101 65536 ram1
[ 2.747956] (driver?)
[ 2.754047] 0102 65536 ram2
[ 2.754056] (driver?)
[ 2.760167] 0103 65536 ram3
[ 2.760176] (driver?)
[ 2.766259] 0104 65536 ram4
[ 2.766268] (driver?)
[ 2.772371] 0105 65536 ram5
[ 2.772380] (driver?)
[ 2.778478] 0106 65536 ram6
[ 2.778487] (driver?)
[ 2.784574] 0107 65536 ram7
[ 2.784582] (driver?)
[ 2.790695] 0108 65536 ram8
[ 2.790704] (driver?)
[ 2.796803] 0109 65536 ram9
[ 2.796812] (driver?)
[ 2.802897] 010a 65536 ram10
[ 2.802905] (driver?)
[ 2.809096] 010b 65536 ram11
[ 2.809106] (driver?)
[ 2.815275] 010c 65536 ram12
[ 2.815283] (driver?)
[ 2.821474] 010d 65536 ram13
[ 2.821482] (driver?)
[ 2.827668] 010e 65536 ram14
[ 2.827677] (driver?)
[ 2.833851] 010f 65536 ram15
[ 2.833859] (driver?)
[ 2.840056] b300 15126528 mmcblk0
[ 2.840066] driver: mmcblk
[ 2.846865] b301 2097152 mmcblk0p1 e970f82a-01
[ 2.846876]
[ 2.853657] b302 4194304 mmcblk0p2 e970f82a-02
[ 2.853666]
[ 2.860466] No filesystem could mount root, tried:
[ 2.860471] ext3
[ 2.865338] ext2
[ 2.867276] ext4
[ 2.869192] squashfs
[ 2.871110] vfat
[ 2.873376] msdos
[ 2.875294] ntfs
[ 2.877313] ntfs3
[ 2.879226]
[ 2.882710] Kernel panic - not syncing: VFS: Unable to mount root fs on "/dev/ram" or unknown-block(1,0)
[ 2.892189] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.10 #1
[ 2.898809] Hardware name: Xilinx Zynq Platform
[ 2.903332] Call trace:
[ 2.903346] unwind_backtrace from show_stack+0x10/0x14
[ 2.911111] show_stack from dump_stack_lvl+0x54/0x68
[ 2.916188] dump_stack_lvl from panic+0x10c/0x344
[ 2.920996] panic from mount_root_generic+0x2a0/0x2a8
[ 2.926153] mount_root_generic from prepare_namespace+0x1fc/0x254
[ 2.932341] prepare_namespace from kernel_init+0x1c/0x12c
[ 2.937835] kernel_init from ret_from_fork+0x14/0x28
[ 2.942895] Exception stack(0xd0815fb0 to 0xd0815ff8)
[ 2.947941] 5fa0: 00000000 00000000 00000000 00000000
[ 2.956119] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.964294] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 2.970966] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on "/dev/ram" or unknown-block(1,0) ]---
起動しました！
rootfsが見つからないので、Kernel panicにはなってますが、カーネル自体は、起動しています。
この検証で、rootfsの構築や、デフォルトのU-bootの起動設定で起動しない点は課題ですが、U-bootの起動や、Kernelの起動はできることがわかりました。
rootfsの問題は、Nervesのポーティングをする場合、rootfsはNerves提供のものに置き換わるので、この問題は解決できると思います。
まとめ
- この調査で、完全ではありませんが、動作するBuildrootの設定を得る事ができました。
- この設定を元にNervesのポーティングを試してみたいと思います。
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