在Versal VCK190评估套件上使用器件固件升级(DFU)执行USB辅助启动模式测试

在本篇博文中，我们将演示如何在 Versal AI Core 系列 VCK190 评估套件上从 USB 辅助启动模式启动 Linux。

为此，我们将修改启动镜像格式 (BIF)，使用 Vivado 2020.2 通过 USB 来加载第二个可编程器件镜像 (PDI)。

我们将使用 JTAG 作为第一个启动器件来加载 Platform Loader and Manager (PLM)，使用 USB 作为第二个启动器件来加载其他分区（A72、u-boot 和 Linux）。

硬件设置：

使用 USB 线将 VCK190 上的 J308 连接到 PC 主机。
将 SW1 跳线设置为 JTAG 模式。

请参阅以下截屏，查找 JTAG 启动模式设置：

模块框图：

注释：默认情况下，在 PetaLinux BSP 中启用 USB 控制器。

修改 Bootgen 和 BIF 文件以创建启动镜像

我们将基于 Vivado/PetaLinux 生成的 BIF 文件来创建 2 个 BIF 文件。

1. 第一个 BIF 用于生成 PDI，用于从主启动器件启动 PLM。在此示例中，使用的是 JTAG。

我们将第一个 BIF 命名为 A72_primary.bif

有两点值得注意：

必须将“boot_device {usb}”添加到 BIF 中。这样 PLM 即可明确 USB 为辅助启动器件。

使用 plm.elf 代替 executable.elf。executable.elf 供 Vivado 用于生成 PDI，但它不支持使用 USB 作为辅助启动器件。因此，我们需要使用 Vitis/PetaLinux 中生成的 plm.elf。
A72_primary.bif：

2. 第二个 BIF 用于生成 PDI，其中包含 u-boot 并通过 USB 器件固件升级 (DFU) 来加载。

我们将第二个 BIF 命名为 A72_secondary.bif

A72_secondary.bif：

A72_secondary.bif

3. 使用 Bootgen 通过以下命令生成主启动镜像和辅助启动镜像。

主启动镜像：

bootgen -arch versal -image a72_primary.bif -w -o boot_primary.bin
****** Xilinx Bootgen v2020.2
**** Build date : Nov 18 2020-09:50:31
** Copyright 1986-2020 Xilinx, Inc. All Rights Reserved.
bootgen -arch versal -image a72_primary.bif -w -o boot_primary.bin
****** Xilinx Bootgen v2020.2
**** Build date : Nov 18 2020-09:50:31
** Copyright 1986-2020 Xilinx, Inc. All Rights Reserved.

[WARNING]: BOOTGEN_POST_PROCESSING is enabled, CDOs will be post processed

[INFO] : Bootimage generated successfully

辅助启动镜像：
bootgen -arch versal -image a72_secondary.bif -w -o boot_secondary.bin
****** Xilinx Bootgen v2020.2
**** Build date : Nov 18 2020-09:50:31
** Copyright 1986-2020 Xilinx, Inc. All Rights Reserved.

[WARNING]: BOOTGEN_POST_PROCESSING is enabled, CDOs will be post processed

[INFO] : Bootimage generated successfully

将镜像下载至开发板

1.在目标器件上使用 JTAG 加载 boot_primary.bin 镜像

2. 打印以下消息后，PLM 应等待辅助镜像。
[7.667278]Xilinx Versal Platform Loader and Manager
[12.376881]Release 2020.2 Aug 31 2020 - 09:50:03
[17.085931]Platform Version: v1.0 PMC: v1.0, PS: v1.0
[21.881875]STDOUT: PS UART
[24.324281]****************************************
[28.985971] 24.515056 ms for PrtnNum: 1, Size: 2432 Bytes
[34.094090]-------Loading Prtn No: 0x2
[38.309037] 0.692037 ms for PrtnNum: 2, Size: 48 Bytes
[42.467100]-------Loading Prtn No: 0x3
[96.268506] 50.276421 ms for PrtnNum: 3, Size: 56912 Bytes
[98.652475]-------Loading Prtn No: 0x4
[102.562750] 0.388331 ms for PrtnNum: 4, Size: 2512 Bytes
[107.286018]-------Loading Prtn No: 0x5
[110.907934] 0.013368 ms for PrtnNum: 5, Size: 3424 Bytes
[116.006421]-------Loading Prtn No: 0x6
[119.620971] 0.004568 ms for PrtnNum: 6, Size: 80 Bytes
[124.622246]+++++++Loading Image No: 0x2, Name: pl_cfi, Id: 0x18700000
[130.830893]-------Loading Prtn No: 0x7
[5791.450975] 5657.002021 ms for PrtnNum: 7, Size: 8407952 Bytes
[5794.366281]-------Loading Prtn No: 0x8
[6174.214668] 376.148515 ms for PrtnNum: 8, Size: 539520 Bytes
[6176.999787]+++++++Loading Image No: 0x3, Name: aie_subsys, Id: 0x0421C005
[6183.671081]-------Loading Prtn No: 0x9
[6190.315521] 2.944596 ms for PrtnNum: 9, Size: 352 Bytes
[6192.665846]+++++++Loading Image No: 0x4, Name: fpd, Id: 0x0420C003
[6198.726037]-------Loading Prtn No: 0xA
[6203.102859] 0.679168 ms for PrtnNum: 10, Size: 1136 Bytes
[6207.766790]Loading PDI from USB
[6210.762365]Monolithic/Master Device

3. 检查确认 DFU 能否检测到 USB 目标。
$ sudo dfu-util -l
USB 器件应使用 VendorId : ProductId（即 03fd:0050）进行枚举。

您应看到如下输出：
Found DFU: [03fd:0050] devnum=0, cfg=1, intf=0, alt=1, name="Xilinx DFU Downloader

注释：如果您未看到“Found DFU”消息，请验证连接，然后重试。

4. 在 PC 主机上运行以下命令以使用 dfu-util 将辅助镜像 boot_secondary.bin 下载到 VCK190。
sudo dfu-util d 03fd:0050 -D boot_secondary.bin
检查 UART 0 终端，等待至 U-Boot 加载完成。这样将显示 u-boot 控制台。

5. 出现 U-Boot 提示后，输入 Enter 以终止自动启动。在 UART1 控制台中验证应用是否已加载成功。

6. 在 U-Boot 控制台中，启动 DFU_RAM 以启用 Linux 镜像下载：
U-boot> run dfu_ram

7. 使用以下命令从“Host Machine Terminal”（主机终端）下载 Linux 镜像和 system.dtb：
$ sudo dfu-util -l
以上命令显示了 DFU RAM 的 alt 信息，如下所示：
Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=0, name="Image"
Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=1, name="system.dtb"
Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=0, name="Image"
Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=1, name="system.dtb"
1. dfu-util -d 03fd:0300 -D ./Image -a 0
2. dfu-util -d 03fd:0300 -D ./system.dtb -a 1

8. 在 U-Boot 上看到 DOWNLOAD 消息后，请在 U-Boot 控制台上使用 Ctrl+C 停止 dfu_ram。
##DOWNLOAD ... OK

按 Ctrl+C 退出。

9. 从 U-Boot 控制台运行 booti 命令以运行 Linux。
U-boot> booti 0x18000000 - 0x40000000
（请在 U-Boot 环境内检查此地址）

10. 验证在目标器件上是否已成功加载 Linux。

主机侧日志
root@machine_id:~# dfu-util -l
dfu-util 0.5

(C) 2005-2008 by Weston Schmidt, Harald Welte and OpenMoko Inc.
(C) 2010-2011 Tormod Volden (DfuSe support)
This program is Free Software and has ABSOLUTELY NO WARRANTY

dfu-util does currently only support DFU version 1.0

Found DFU: [03fd:0050] devnum=0, cfg=1, intf=0, alt=1, name="Xilinx DFU Downloader"

root@machine_id:~# dfu-util -D boot_secondary.bin
dfu-util 0.5

(C) 2005-2008 by Weston Schmidt, Harald Welte and OpenMoko Inc.
(C) 2010-2011 Tormod Volden (DfuSe support)
This program is Free Software and has ABSOLUTELY NO WARRANTY

dfu-util does currently only support DFU version 1.0

Opening DFU USB device... ID 03fd:0050
Run-time device DFU version 0110
Found DFU: [03fd:0050] devnum=0, cfg=1, intf=0, alt=1, name="Xilinx DFU Downloader"
Claiming USB DFU Interface...
Setting Alternate Setting #1 ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 1024
No valid DFU suffix signature
Warning: File has no DFU suffix
bytes_per_hash=19961
Copying data from PC to DFU device
Starting download: [##################################################] finished!
state(2) = dfuIDLE, status(0) = No error condition is present
Done!

root@machine_id:~# dfu-util -l
dfu-util 0.5

(C) 2005-2008 by Weston Schmidt, Harald Welte and OpenMoko Inc.
(C) 2010-2011 Tormod Volden (DfuSe support)
This program is Free Software and has ABSOLUTELY NO WARRANTY

dfu-util does currently only support DFU version 1.0

Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=0, name="Image"
Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=1, name="system.dtb"
root@machine_id:~#
root@machine_id:~#
root@machine_id:~# cp -rf /proj/css/Aravind_babu/Image .
root@machine_id:~# cp -rf /proj/css/Aravind_babu/system.dtb .
root@machine_id:~#

root@machine_id:~# dfu-util -d 03fd:0300 -D Image -a 0
dfu-util 0.5

(C) 2005-2008 by Weston Schmidt, Harald Welte and OpenMoko Inc.
(C) 2010-2011 Tormod Volden (DfuSe support)
This program is Free Software and has ABSOLUTELY NO WARRANTY

dfu-util does currently only support DFU version 1.0

Filter on vendor = 0x03fd product = 0x0300
Opening DFU USB device... ID 03fd:0300
Run-time device DFU version 0110
Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=0, name="Image"
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 4096
No valid DFU suffix signature
Warning: File has no DFU suffix
bytes_per_hash=347678
Copying data from PC to DFU device
Starting download: [##################################################] finished!
state(7) = dfuMANIFEST, status(0) = No error condition is present
state(2) = dfuIDLE, status(0) = No error condition is present
Done!

root@machine_id:~# dfu-util -d 03fd:0300 -D system.dtb -a 1
dfu-util 0.5

(C) 2005-2008 by Weston Schmidt, Harald Welte and OpenMoko Inc.
(C) 2010-2011 Tormod Volden (DfuSe support)
This program is Free Software and has ABSOLUTELY NO WARRANTY

dfu-util does currently only support DFU version 1.0

Filter on vendor = 0x03fd product = 0x0300
Opening DFU USB device... ID 03fd:0300
Run-time device DFU version 0110
Found DFU: [03fd:0300] devnum=0, cfg=1, intf=0, alt=1, name="system.dtb"
Claiming USB DFU Interface...
Setting Alternate Setting #1 ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 4096
No valid DFU suffix signature
Warning: File has no DFU suffix
bytes_per_hash=832
Copying data from PC to DFU device
Starting download: [##################################################] finished!
state(7) = dfuMANIFEST, status(0) = No error condition is present
state(2) = dfuIDLE, status(0) = No error condition is present
Done!

log 日志

[7.667278]Xilinx Versal Platform Loader and Manager
[12.376881]Release 2020.2 Aug 31 2020 - 09:50:03
[17.085931]Platform Version: v1.0 PMC: v1.0, PS: v1.0
[21.881875]STDOUT: PS UART
[24.324281]****************************************
[28.985971] 24.515056 ms for PrtnNum: 1, Size: 2432 Bytes
[34.094090]-------Loading Prtn No: 0x2
[38.309037] 0.692037 ms for PrtnNum: 2, Size: 48 Bytes
[42.467100]-------Loading Prtn No: 0x3
[96.268506] 50.276421 ms for PrtnNum: 3, Size: 56912 Bytes
[98.652475]-------Loading Prtn No: 0x4
[102.562750] 0.388331 ms for PrtnNum: 4, Size: 2512 Bytes
[107.286018]-------Loading Prtn No: 0x5
[110.907934] 0.013368 ms for PrtnNum: 5, Size: 3424 Bytes
[116.006421]-------Loading Prtn No: 0x6
[119.620971] 0.004568 ms for PrtnNum: 6, Size: 80 Bytes
[124.622246]+++++++Loading Image No: 0x2, Name: pl_cfi, Id: 0x18700000
[130.830893]-------Loading Prtn No: 0x7
[5791.450975] 5657.002021 ms for PrtnNum: 7, Size: 8407952 Bytes
[5794.366281]-------Loading Prtn No: 0x8
[6174.214668] 376.148515 ms for PrtnNum: 8, Size: 539520 Bytes
[6176.999787]+++++++Loading Image No: 0x3, Name: aie_subsys, Id: 0x0421C005
[6183.671081]-------Loading Prtn No: 0x9
[6190.315521] 2.944596 ms for PrtnNum: 9, Size: 352 Bytes
[6192.665846]+++++++Loading Image No: 0x4, Name: fpd, Id: 0x0420C003
[6198.726037]-------Loading Prtn No: 0xA
[6203.102859] 0.679168 ms for PrtnNum: 10, Size: 1136 Bytes
[6207.766790]Loading PDI from USB
[6210.762365]Monolithic/Master Device
[14602.209878]8394.398825 ms: PDI initialization time
[14604.323262]+++++++Loading Image No: 0x0, Name: apu_subsyste, Id: 0x1C000000
[14611.146703]-------Loading Prtn No: 0x0
[14614.942668] 0.012150 ms for PrtnNum: 0, Size: 41632 Bytes
[14620.302859]-------Loading Prtn No: 0x1
[14624.102159] 0.015812 ms for PrtnNum: 1, Size: 59360 Bytes
[14629.458853]-------Loading Prtn No: 0x2
[14633.428109] 0.185400 ms for PrtnNum: 2, Size: 896512 Bytes
[14638.786881]***********Boot PDI Load: Done*************
[14643.873331]765870.806637 ms: ROM Time
[14647.508740]Total PLM Boot Time
NOTICE: ATF running on Xilinx Versal Silicon
WARNING: BL31: invalid exception level (3)
NOTICE: BL31: Secure code at 0x0
NOTICE: BL31: Non secure code at 0x8000000
NOTICE: BL31: v2.2(debug):rel-v2020.2_SAM_EA2-1-g3e90bb84f
NOTICE: BL31: Built : 13:22:27, Aug 28 2020
INFO: GICv3 with legacy support detected. ARM GICv3 driver initialized in EL3
INFO: BL31: Initializing runtime services
WARNING: BL31: cortex_a72: CPU workaround for 859971 was missing!
INFO: BL31: cortex_a72: CPU workaround for cve_2017_5715 was applied
INFO: BL31: cortex_a72: CPU workaround for cve_2018_3639 was applied
INFO: BL31: Preparing for EL3 exit to normal world
INFO: Entry point address = 0x8000000
INFO: SPSR = 0x3c9

U-Boot 2020.01 (Sep 02 2020 - 08:11:32 +0000)

Model: Xilinx Versal vck190 Eval board revA (QSPI)
DRAM: 6 GiB
EL Level: EL2
MMC: sdhci@f1050000: 0
In: serial@ff000000
Out: serial@ff000000
Err: serial@ff000000
Bootmode: JTAG_MODE
Net:
ZYNQ GEM: ff0c0000, mdio bus ff0c0000, phyaddr 1, interface rgmii-id

Warning: ethernet@ff0c0000 (eth0) using random MAC address - 86:d3:1d:bd:e8:8e
eth0: ethernet@ff0c0000
ZYNQ GEM: ff0d0000, mdio bus ff0c0000, phyaddr 2, interface rgmii-id

Warning: ethernet@ff0d0000 (eth1) using random MAC address - 76:8d:63:c4:fe:17
, eth1: ethernet@ff0d0000
Hit any key to stop autoboot: 0
Versal>
Versal> run dfu_ram
#DOWNLOAD ... OK
Ctrl+C to exit ...
#DOWNLOAD ... OK
Ctrl+C to exit ...
Versal>
Versal> pri
arch=arm
baudrate=115200
board=versal
board_name=versal
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/bootaa64.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=jtag pxe dhcp jtag mmc0 mmc1 xspi0 dfu_usb pxe dhcp
bootcmd=run distro_bootcmd
bootcmd_dfu_usb=setenv dfu_alt_info boot.scr ram $scriptaddr $script_size_f; dfu 0 ram 0 && echo DFU: Trying to boot script at ${scriptaddr} && source ${scriptaddr}; echo DFU: SCRIPT FAILED: continuing...;
bootcmd_dhcp=run boot_net_usb_start; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi;setenv efi_fdtfile ${fdtfile}; setenv efi_old_vci ${bootp_vci};setenv efi_old_arch ${bootp_arch};setenv bootp_vci PXEClient:Arch:00011:UNDI:003000;setenv bootp_arch 0xb;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_jtag=echo JTAG: Trying to boot script at ${scriptaddr} && source ${scriptaddr}; echo JTAG: SCRIPT FAILED: continuing...;
bootcmd_mmc0=devnum=0; run mmc_boot
bootcmd_mmc1=devnum=1; run mmc_boot
bootcmd_pxe=run boot_net_usb_start; dhcp; if pxe get; then pxe boot; fi
bootcmd_xspi0=sf probe 0 0 0 && sf read $scriptaddr $script_offset_f $script_size_f && echo XSPI: Trying to boot script at ${scriptaddr} && source ${scriptaddr}; echo XSPI: SCRIPT FAILED: continuing...;
bootdelay=5
bootm_low=0
bootm_size=80000000
cpu=armv8
dfu_alt_info=Image ram 0x18000000 0x10000000;system.dtb ram 0x40000000 0x400000
dfu_ram=run dfu_ram_info && dfu 0 ram 0
dfu_ram_info=setenv dfu_alt_info Image ram $kernel_addr_r $kernel_size_r\;system.dtb ram $fdt_addr_r $fdt_size_r
distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
efi_dtb_prefixes=/ /dtb/ /dtb/current/
fdt_addr_r=0x40000000
fdt_high=10000000
fdt_size_r=0x400000
fdtcontroladdr=7ded9b20
initrd_high=79000000
kernel_addr_r=0x18000000
kernel_size_r=0x10000000
load_efi_dtb=load ${devtype} ${devnum}:${distro_bootpart} ${fdt_addr_r} ${prefix}${efi_fdtfile}
mmc_boot=if mmc dev ${devnum}; then devtype=mmc; run scan_dev_for_boot_part; fi
pxefile_addr_r=0x10000000
ramdisk_addr_r=0x02100000
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}; 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/bootaa64.efi; then echo Found EFI removable media binary efi/boot/bootaa64.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
script_offset_f=7f80000
script_size_f=0x80000
scriptaddr=0x20000000
soc=versal
stderr=serial@ff000000
stdin=serial@ff000000
stdout=serial@ff000000
thor_ram=run dfu_ram_info && thordown 0 ram 0
ubifs_boot=env exists bootubipart || env set bootubipart UBI; env exists bootubivol || env set bootubivol boot; if ubi part ${bootubipart} && ubifsmount ubi${devnum}:${bootubivol}; then devtype=ubi; run scan_dev_for_boot; fi
usb_boot=usb start; if usb dev ${devnum}; then devtype=usb; run scan_dev_for_boot_part; fi
vendor=xilinx

Environment size: 4783/32764 bytes

Versal> booti 0x18000000 - 0x40000000
## Flattened Device Tree blob at 40000000
Booting using the fdt blob at 0x40000000
Loading Device Tree to 000000000fff2000, end 000000000ffff294 ... OK

Starting kernel ...

[ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd083]
[ 0.000000] Linux version 5.4.0-xilinx-v2020.1 (oe-user@oe-host) (gcc version 9.2.0 (GCC)) #1 SMP Wed Sep 2 08:07:18 UTC 2020
[ 0.000000] Machine model: Xilinx Versal vck190 Eval board revA (QSPI)
[ 0.000000] earlycon: pl11 at MMIO32 0x00000000ff000000 (options '115200n8')
[ 0.000000] printk: bootconsole [pl11] enabled
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: UEFI not found.
[ 0.000000] cma: Reserved 256 MiB at 0x0000000070000000
[ 0.000000] psci: probing for conduit method from DT.
[ 0.000000] psci: PSCIv1.1 detected in firmware.
[ 0.000000] psci: Using standard PSCI v0.2 function IDs
[ 0.000000] psci: MIGRATE_INFO_TYPE not supported.
[ 0.000000] psci: SMC Calling Convention v1.1
[ 0.000000] percpu: Embedded 22 pages/cpu s49880 r8192 d32040 u90112
[ 0.000000] Detected PIPT I-cache on CPU0
[ 0.000000] CPU features: detected: GIC system register CPU interface

....

root@xilinx-vck190-es1-2020_2:~#

注释：请在启动镜像和 log 日志中找到随附的 BIF 文件。

　　审核编辑：汤梓红