Digilent Embedded Linux - Manual (Page 10)

Using Zynq with Linux
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Example 5.
U-Boot Commands
Before the autoboot starts, there is a default three-second count down. Users may press any key
during the count-down to interrupt the autoboot procedure and type in custom commands to boot
the Linux kernel manually.
Here are some of the most popular commands:
Printenv will print the environment variables of u-boot. (See Example 6.)
U-Boot 2011.03-dirty (Jul 11 2012 - 16:07:00)
DRAM: 512 MiB
MMC: SDHCI: 0
Using default environment
In: serial
Out: serial
Err: serial
Net: zynq_gem
Hit any key to stop autoboot: 0
Copying Linux from SD to RAM...
Device: SDHCI
Manufacturer ID: 3
OEM: 5344
Name: SU04G
Tran Speed: 25000000
Rd Block Len: 512
SD version 1.10
High Capacity: Yes
Capacity: 3965190144
Bus Width: 1-bit
reading zImage
2479640 bytes read
reading devicetree.dtb
5817 bytes read
reading ramdisk8M.image.gz
3694108 bytes read
## Starting application at 0x00008000 ...
Uncompressing Linux... done, booting the
kernel.
[ 0.000000] Booting Linux on physical CPU 0