Revision as of 18:37, 3 January 2015

APF6 eMMC layout

By default, the 4GB eMMC on APF6 board has 4 physical/hardware partitions:

Boot0

Boot1

RPMB

User Data

Name	U-Boot name	Size	Comment
boot0	mmc dev 0 1	2MBytes	U-Boot is installed on this partition
boot1	mmc dev 0 2	2MBytes	Not used
rpmb	mmc dev 0 3	512KBytes	Not used
User Data	mmc dev 0 0	remaining space	Kernel, device tree and rootfs

Offset (blocks)	Offset (bytes)	Comment
0	0
0x02	1 KB	U-Boot SPL (apf6-u-boot.spl)
0x8a	69 KB	U-Boot IMG (apf6-u-boot.img)
	512 KB
	1024 KB	U-Boot environment
	1536 KB	Redundant U-Boot environment

There are two primary partitions on the "User Data" physical partition:

Boot

Rootfs

Name	U-Boot device	Linux device	Size	Comment
Boot	mmc 0:1	/dev/mmcblk2p1	24 MBytes (49152 blocks)	The kernel and the device tree (inside a dtbs/ directory) are on this partition (ext4 formatted)
Rootfs	mmc 0:2	/dev/mmcblk2p2	Rest of space (<3816448 blocks)	the rootfs is on this partition (ext4 formatted)

@@ Line 29: / Line 29: @@
 {| border="1" cellpadding="5" cellspacing="0" summary="Functionnalities test results"
 |- style="background:#efefef;" align="center"
-! Offset || Comment
+! Offset (blocks) || Offset (bytes) || Comment
 |----------------
-|0 ||
+|0 || 0 ||
 |----------------
-|1 KB || U-Boot SPL (apf6-u-boot.spl)
+|0x02 || 1 KB || U-Boot SPL (apf6-u-boot.spl)
 |----------------
-|69 KB || U-Boot IMG (apf6-u-boot.img)
+|0x8a || 69 KB || U-Boot IMG (apf6-u-boot.img)
 |----------------
-|512 KB ||
+||| 512 KB ||
 |----------------
-|1024 KB || U-Boot environment
+||| 1024 KB || U-Boot environment
 |----------------
-|1536 KB || Redundant U-Boot environment
+||| 1536 KB || Redundant U-Boot environment
 |----------------
 |}