如题，我按照zynq_ctt里面JTAG启动linux，但是在go 0x8000步骤后，出现zynq-uboot>提示标记，配置zynq IP地址的时候输入指令zynq-uboot>ifconfig 192.168.1.10 netmask 255.255.255.0提示命令不可用，之后help后只出现如下可用命令：
base - print or set address offset
bdinfo - print Board Info structure
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
date - get/set/reset date & time
echo - echo args to console
editenv - edit environment variable
env - environment handling commands
ext2load- load binary file from a Ext2 filesystem
ext2ls - list files in a directory (default /)
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls - list files in a directory (default /)
fdt - flattened device tree utility commands
fpga - loadable FPGA image support
go - start application at address 'addr'
help - print command description/usage
iminfo - print header information for application image
imxtract- extract a part of a multi-image
itest - return true/false on integer compare
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loady - load binary file over serial line (ymodem mode)
loop - infinite loop on address range
md - memory display
mm - memory modify (auto-incrementing address)
mmc - MMC sub system
mmcinfo - display MMC info
mtest - simple RAM read/write test
mw - memory write (fill)
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
ping - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
reset - Perform RESET of the CPU
run - run commands in an environment variable
setenv - set environment variables
sf - SPI flash sub-system
sleep - delay execution for some time
source - run script from memory
sspi - SPI utility command
tftpboot- boot image via network using TFTP protocol
version - print monitor, compiler and linker version
是不是linux镜像有问题，还是根本就没启动成功。
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