我已经通过以下网站为Beaglebone黑板准备了uboot.img，MLO，uImage，am335x-boneblack.dtb，uEnv.txt文件
http://embedjournal.com/kernel-compilation-beaglebone-black
我还在SD卡上创建了boot和rfs分区，然后复制了MLO，然后复制了uboot.img，然后复制了其他文件。我通过按住开关S2启动并获得此日志
U-Boot SPL 2016.07-00224-g62a3b7d (Jul 16 2016 - 23:35:47)
Trying to boot from MMC1
MMC partition switch failed
*** Warning - MMC partition switch failed, using default environment
reading u-boot.img
reading u-boot.img
U-Boot 2016.07-00224-g62a3b7d (Jul 16 2016 - 23:35:47 +0530)
I2C: ready
DRAM: 512 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - bad CRC, using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
cpsw, usb_ether
Press SPACE to abort autoboot in 2 seconds
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
reading boot.scr
** Unable to read file boot.scr **
reading uEnv.txt
351 bytes read in 4 ms (85 KiB/s)
Loaded env from uEnv.txt
Importing environment from mmc0 ...
Running uenvcmd ...
Booting from Network ...
reading uImage
7677504 bytes read in 690 ms (10.6 MiB/s)
reading am335x-boneblack.dtb
61606 bytes read in 13 ms (4.5 MiB/s)
## Booting kernel from Legacy Image at 82000000 ...
Image Name: Linux-4.4.15+
Created: 2016-07-16 18:30:19 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 7677440 Bytes = 7.3 MiB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
## Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Loading Kernel Image ... OK
Loading Device Tree to 8ffed000, end 8ffff0a5 ... OK
Starting kernel ...
它无法启动内核我不知道为什么？