根据/Linux/-07/65478p2.htm修改
主机运行操作系统，deepin
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1.安装qemu
sudo apt-get install qemu-system-arm
2.安装arm编译工具
sudo apt-get install gcc-arm-linux-gnueabi
3.下载Linux内核
/pub/linux/kernel/v4.x/linux-4.2.3.tar.xz
修改Makefile，
ARCH = arm
CROSS_COMPILE = arm-linux-gnueabi-
运行命令
make vexpress_defconfig //该文件在目录arch/arm/configs下
make
创建目录 qemu_a9
mkdir ~/qemu_a9
复制zImage和设备树到 qemu_a9 目录
cp arch/arm/boot/zImage ~/qemu_a9
cp arch/arm/boot/dts/vexpress-v2p-ca9.dtb ~/qemu_a9
4.下载busybox
/downloads/busybox-1.23.2.tar.bz2
同样修改Makefile，
ARCH ?= arm
CROSS_COMPILE ?= arm-linux-gnueabi-
安装依赖包
sudo apt-get install libncurses5-dev
运行命令
make defconfig
make menuconfig
选中Busybox Settings --->Build Options --->Build BusyBox as a static binary (no shared libs)
运行命令
make busybox
make install
默认会把文件系统放到_install目录下
5.制作根文件系统:
cd ~/qemu_a9
dd if=/dev/zero of=a9rootfs.ext3 bs=1M count=32
sudo mkfs.ext3 a9rootfs.ext3
mkdir a9rootdir
sudo mount -t ext3 a9rootfs.ext3 a9rootdir/ -o loop
sudo cp busybox-1.23.2/_install/* ~/qemu_a9/a9rootdir/ -r
cd ~/qemu_a9/a9rootdir
sudo mkdir dev etc lib proc sys tmp mnt
sudo vim etc/fstab
输入下面内容
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
tmpfs /tmp tmpfs defaults 0 0
tmpfs /dev tmpfs defaults 0 0
创建init.d目录
sudo mkdir etc/init.d
sudo vim etc/init.d/rcS
输入如下内容
#!/bin/sh
mount -a
mdev -s
添加可执行权限
sudo chmod +x etc/init.d/rcS
卸载
cd ~/qemu_a9
sudo umount ~/qemu_a9/a9rootdir/
5.运行编译的内核
qemu-system-arm -nographic -sd a9rootfs.ext3-M vexpress-a9 -m 512M -kernel zImage -dtb vexpress-v2p-ca9.dtb -smp 4 -append "init=/linuxrc root=/dev/mmcblk0 rw rootwait earlyprintk console=ttyAMA0" 2>/dev/null
带lcd的
qemu-system-arm -sd a9rootfs.ext3 -M vexpress-a9 -m 512M -kernel zImage -dtb vexpress-v2p-ca9.dtb -append "init=/linuxrc root=/dev/mmcblk0 rw rootwait" -net nic -net user -smp 4
当然也可以模拟A15
qemu-system-arm -sd a9rootfs.ext3 -M vexpress-a15 -m 512M -kernel zImage -dtb vexpress-v2p-ca15-tc1.dtb -append "init=/linuxrc root=/dev/mmcblk0 rw rootwait console=ttyAMA0" -nographic -smp 2
qemu-system-arm -sd a9rootfs.ext3 -M vexpress-a15 -m 512M -kernel zImage -dtb vexpress-v2p-ca15-tc1.dtb -append "init=/linuxrc root=/dev/mmcblk0 rw rootwait" -net nic -net user -smp 2
