theobroma systems RK3399-Q7, User Manual

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Offset Contents Files
0 Partition table
32kiB U-Boot SPL “spl.img” spl.img
240kiB U-Boot environment
256kiB U-Boot + ATF + Cortex-M0 firmware u-boot.itb
2MiB Partition 1 (ext4 - Linux root fs) boot.scr, Image, rk3399-puma.dtb, defaultEnv.txt and rootfs
To setup a SD card for booting you first need to create partitions. Partitions can be created using fdisk (assuming the SD
card is mapped to /dev/sd‘‘X‘‘ , where
X
should be replaced with your corresponding device-letter) and has no partitions
(this can be checked using the
p
command):
sudo fdisk / dev / sdX
> p
This should show an empty partition table, for example:
Disk / dev / sdX: 3980 MB, 3980394496 bytes
123 heads, 62 sectors / track, 1019 cylinders, total 7774208 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical / physical): 512 bytes / 512 bytes
I / O size (minimum / optimal): 512 bytes / 512 bytes
Disk identifier: 0xdbbd45c7
Device Boot Start End Blocks Id System
If there are partitions on the sdcard, they can be deleted with
d
.
The required partition can be created with the command
n
, then accepting the defaults, accept for the first sector use 4096:
> n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): <ENTER>
Partition number (1-4, default 1): <ENTER>
First sector (2048-7774207, default 2048): 4096
Last sector, +sectors or +size{K,M,G} (...): <ENTER>
> w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
This will create a primary partition at offset 2MiB.
Release v0.2-3-g574c114
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