备忘：在fedora20下建立qemu for mini2440环境
一：编译
1：编译uboot
首先，进入uboot_for_mini2440，修改Makefile，如下：
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ifeq ($(ARCH),arm)
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#CROSS_COMPILE = arm-linux-
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CROSS_COMPILE = arm-none-eabi-
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endif
然后执行命令：
make mini2440_config
make -j4
2：编译qemu for mini2440
进入qemu_for_mini2440目录，
将coolbacon修改net.c文件替换目录中的同名文件
执行命令：
./configure --target-list=arm-softmmu
直接编译会有链接错误，我修改了config-host.mak，如下：
make -j4
二：运行
将qemu-ifdown和qemu-ifup文件放到/etc目录下
进入qemu_for_mini2440/mini2440/，将先前编译出来的uboot.bin放入该文件夹，打开终端，执行：sudo ./mini2440_start.sh \
输出如下：
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Starting in .
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./../arm-softmmu/qemu-system-arm -M mini2440 -serial stdio -mtdblock ./mini2440_nand128.bin -show-cursor -usb -usbdevice keyboard -usbdevice mouse -net nic,vlan=0 -net tap,vlan=0,ifname=tap0 -monitor telnet::5555,server,nowait
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TUNSETIFF: Device or resource busy
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mini2440_init: Boot mode: NAND
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S3C: CLK=240 HCLK=240 PCLK=240 UCLK=57
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QEMU: ee24c08_init
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DM9000: INIT QEMU MAC : 52:54:00:12:34:56
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QEMU mini2440_reset: loaded default u-boot from NAND
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QEMU mini2440_reset: loaded override u-boot (size 39200)
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S3C: CLK=240 HCLK=60 PCLK=30 UCLK=57
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S3C: CLK=240 HCLK=60 PCLK=30 UCLK=48
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S3C: CLK=405 HCLK=101 PCLK=50 UCLK=48
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U-Boot 1.3.2-mini2440 (Dec 24 2013 - 21:25:17)
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I2C: ready
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DRAM: 64 MB
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NOR Flash not found. Use hardware switch and 'flinit'
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Flash: 0 kB
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NAND: Bad block table not found for chip 0
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Bad block table not found for chip 0
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128 MiB
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*** Warning - bad CRC or NAND, using default environment
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USB: S3C2410 USB Deviced
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In: serial
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Out: serial
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Err: serial
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MAC: 08:08:11:18:12:27
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Hit any key to stop autoboot: 0
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MINI2440 #
打完收工。
归纳起来很是简单，虽然是搭建完成了，但倘若未对这些软件有个透彻的理解，下次换个系统重新搞的话，估计又问题重重了。聊以记下，下次少走弯路。
BTW：诸多参考
http://www.cnblogs.com/jinmu190/archive/2011/03/21/1990698.html
http://blog.csdn.net/coolbacon/article/details/6252938
http://blog.csdn.net/zeroboundary/article/details/12657215
http://blog.csdn.net/taosinker/article/details/7440354
文中的三个小文件，
mini2440附加.zip
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