我把MLO和uboot放在boot分区，把filesystem放在rootfs分区后，板子启动后串口打印下列信息是怎么回事？
U-Boot SPL 2013.10 (Feb 10 2015 - 15:06:25) reading args spl: error reading image args, err - -1 reading u-boot.img reading u-boot.img
U-Boot 2013.10 (Feb 10 2015 - 15:06:25)
I2C: ready DRAM: 256 MiB NAND: 0 MiB MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 *** Error - No Valid Environment Area found *** Warning - bad CRC, using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC cpsw, usb_ether Hit any key to stop autoboot: 3 2 1 0 mmc0 is current device Scanning mmc 0... ** File not found /boot/zImage ** mmc0 is current device SD/MMC found on device 0 reading uEnv.txt ** Unable to read file uEnv.txt ** ** File not found /boot/zImage ** Card did not respond to voltage select! mmc1(part 0) is current device Card did not respond to voltage select! Booting from nand ...
no devices available
no devices available Bad Linux ARM zImage magic! U-Boot#
还有我用USB连接板子和电脑后，在Linux虚拟机下用minicom打印不出板子的信息，在win7下才能打印？需要怎么设置，我的minicom已经设置好了的
