$ sudo add-apt-repository ppa:linaro-maintainers/tools

$ sudo apt-get install linaro-image-tools qemu-user-static qemu-system

$ sudo apt-get install gcc-arm-linux-gnueabi g++-arm-linux-gnueabi

$ sudo apt install bridge-utils

$ wget -c ftp://ftp.denx.de/pub/u-boot/u-boot-2016.09.tar.bz2

$ tar xvf u-boot-2016.09.tar.bz2

$ cd u-boot-2016.09

#define V2M_BASE        0x80000000

#define CONFIG_SYS_TEXT_BASE    0x80800000

#endif

/* 添加如下三行代码 */

#define CONFIG_IPADDR   192.168.0.5

#define CONFIG_NETMASK  255.255.255.0

#define CONFIG_SERVERIP 192.168.0.3

/*

 * Physical addresses, offset from V2M_PA_CS0-3

 */

#define V2M_NOR0        (V2M_PA_CS0)

#define V2M_NOR1        (V2M_PA_CS1)

........

........

........

/* 对如下 CONFIG_BOOTCOMMAND 作出修改 */

/* Basic environment settings */

#define CONFIG_BOOTCOMMAND \

    "run distro_bootcmd; " \

    "run bootflash; "

#undef CONFIG_BOOTCOMMAND

#define CONFIG_BOOTCOMMAND "tftp 0x62008000 kernel; setenv bootargs 'root=/dev/mmcblk0 console=ttyAMA0,38400n8'; bootz 0x62008000"

#define BOOT_TARGET_DEVICES(func) \

        func(MMC, mmc, ) \

        func(MMC, mmc, ) \

        func(PXE, pxe, na) \

        func(DHCP, dhcp, na)

#include <config_distro_bootcmd.h>

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- vexpress_ca9x4_defconfig

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-

$ mkdir -p ~/tftp

$ ln -sf $PWD/u-boot ~/tftp

$ wget -c https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.7.3.tar.xz

$ tar xvf linux-4.7..tar.xz

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- vexpress_defconfig

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- menuconfig

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- all

$ ln -sf arch/arm/boot/dts/vexpress-v2p-ca9.dtb ~/tftp

$ ln -sf arch/arm/boot/zImage ~/tftp

#!/bin/sh

#

#cript to bring up the tun device in QEMU in bridged mode

# first parameter is name of tap device (e.g. tap0)

#

# some constants specific to the local host - change to suit your host

#

ETH0IPADDR=192.168.0.3

MASK=255.255.255.0

GATEWAY=192.168.0.1

BROADCAST=192.168.0.255

ETH=enp0s3 # 根据自己的网络接口修改。

#

# First take eth0 down, then bring it up with IP address 0.0.0.0

#

ifdown $ETH

ifconfig $ETH 0.0.0.0 promisc up

#

# Bring up the tap device (name specified as first argument, by QEMU)

#

#/usr/sbin/openvpn --mktun --dev $ --user `id -un`

ifconfig $ 0.0.0.0 promisc up

#

# create the bridge between eth0 and the tap device

#

brctl addbr br0

brctl addif br0 $ETH

brctl addif br0 $

#

# only a single bridge so loops are not possible, turn off spanning tree protocol

#

brctl stp br0 off

#

# Bring up the bridge with ETH0IPADDR and add the default route

#

ifconfig br0 $ETH0IPADDR netmask $MASK broadcast $BROADCAST

route add default gw $GATEWAY

#

# stop firewall - comment this out if you don't use Firestarter

#

#service firestarter stop 

#!/bin/sh

#

# Script to bring down and delete bridge br0 when QEMU exits

#

# Bring down eth0 and br0

#

ETH=enp0s3

ifdown $ETH

ifdown br0

ifconfig br0 down

#

# Delete the bridge

#

brctl delbr br0

#

# bring up eth0 in "normal" mode

#

ifconfig $ETH -promisc

ifup $ETH

#

# delete the tap device

#

#/usr/sbin/openvpn --rmtun --dev $

#

# start firewall again

#

#service firestarter start

$ sudo cp qemu-if* /etc

$ sudo chmod +x /etc/qemu-if*

$ cd ~/tftp && cp zImage kernel

$ cat express-v2p-ca9.dtb >> kernel

$ sudo qemu-system-arm -M vexpress-a9 \

                -m 128M -nographic \

                -net nic -net tap,ifname=tap0 \

                -kernel u-boot \

                -dtb vexpress-v2p-ca9.dtb

U-Boot 2016.07 (Sep   - :: +)

DRAM:   MiB

WARNING: Caches not enabled

Flash:  MiB

MMC:   MMC:

*** Warning - bad CRC, using default environment

In:    serial

Out:   serial

Err:   serial

Net:   smc911x-

Hit any key to stop autoboot:

smc911x: MAC :::::

smc911x: detected LAN9118 controller

smc911x: phy initialized

smc911x: MAC :::::

Using smc911x- device

TFTP from server 192.168.0.3; our IP address is 192.168.0.5

Filename 'kernel'.

Load address: 0x62008000

Loading: #################################################################

     #################################################################

     #################################################################

     #################################################################

     #################################################################

     #################################################################

     #################################################################

     #################################################################

     #################################################################

     #################################################################

     ################################################

      MiB/s

done

Bytes transferred =  (367d5c hex)

smc911x: MAC :::::

Kernel image @ 0x62008000 [ 0x000000 - 0x3643e8 ]

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Booting Linux on physical CPU 0x0

Linux version 4.7. (rain@rain-pc) (gcc version 5.4.  (Ubuntu/Linaro 5.4.-6ubuntu1~16.04.) ) # SMP Fri Sep  :: CST

CPU: ARMv7 Processor [410fc090] revision  (ARMv7), cr=10c5387d

CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache

Machine model: V2P-CA9

Memory policy: Data cache writeback

CPU: All CPU(s) started in SVC mode.