Uncompressing Linux... done, booting the kernel.

hi
i used beaglebone black install volumio 1.5
flash to the sd card
but startup done is error
why?

U-Boot SPL 2016.01-00001-g795bd53 (Jan 25 2016 - 20:02:29)
Trying to boot from MMC
bad magic

U-Boot 2016.01-00001-g795bd53 (Jan 25 2016 - 20:02:29 -0600), Build: jenkins-github_Bootloader-Builder-325

   Watchdog enabled

I2C: ready
DRAM: 512 MiB
Reset Source: Global external warm reset has occurred.
Reset Source: Power-on reset has occurred.
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
Using default environment

Net: 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
Scanning mmc 0:1…
gpio: pin 56 (gpio 56) value is 0
gpio: pin 55 (gpio 55) value is 0
gpio: pin 54 (gpio 54) value is 0
gpio: pin 53 (gpio 53) value is 1
switch to partitions #0, OK
mmc0 is current device
gpio: pin 54 (gpio 54) value is 1
Checking for: /uEnv.txt …
reading uEnv.txt
808 bytes read in 3 ms (262.7 KiB/s)
gpio: pin 55 (gpio 55) value is 1
Loaded environment from uEnv.txt
Importing environment from mmc …
Checking if uenvcmd is set …
gpio: pin 56 (gpio 56) value is 1
Running uenvcmd …
switch to partitions #0, OK
mmc1(part 0) is current device
switch to partitions #0, OK
mmc0 is current device
3245640 bytes read in 193 ms (16 MiB/s)
Booting from external microSD…
23801 bytes read in 24 ms (967.8 KiB/s)

Error: “mmcargs” not defined

Kernel image @ 0x82000000 [ 0x000000 - 0x318648 ]

Flattened Device Tree blob at 88000000

Booting using the fdt blob at 0x88000000
Loading Device Tree to 8fff7000, end 8ffffcf8 … OK

Starting kernel …

Uncompressing Linux… done, booting the kernel.