Difference between revisions of "APF6 EMMC"
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{| border="1" cellpadding="10" cellspacing="0" summary="APF6 eMMC partitions" | {| border="1" cellpadding="10" cellspacing="0" summary="APF6 eMMC partitions" | ||
|---------------- | |---------------- | ||
| + | | style="width:50px;background:green;color:white;" align="center" | ... | ||
| style="width:100px;background:green;color:white;" align="center" | Boot | | style="width:100px;background:green;color:white;" align="center" | Boot | ||
| style="width:600px;background:green;color:white;" align="center" | Rootfs | | style="width:600px;background:green;color:white;" align="center" | Rootfs | ||
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{| border="1" cellpadding="5" cellspacing="0" summary="APF6 eMMC User data partitions details" | {| border="1" cellpadding="5" cellspacing="0" summary="APF6 eMMC User data partitions details" | ||
|- style="background:#efefef;" align="center" | |- style="background:#efefef;" align="center" | ||
| − | !Name || U-Boot device || Linux device || Size || Comment | + | !Name || U-Boot device || Linux device || Offset (blocks) || 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) | + | |Boot || mmc 0:1 || /dev/mmcblk2p1 || 2048 (0x800) || 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) | + | |Rootfs || mmc 0:2 || /dev/mmcblk2p2 || (0x18800) || Rest of space (<3816448 blocks) || the rootfs is on this partition (ext4 formatted) |
|---------------- | |---------------- | ||
|} | |} | ||
Revision as of 19:41, 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 |
Boot0 partition layout
| 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 |
User Data partition layout
There are two primary partitions on the "User Data" physical partition:
| ... | Boot | Rootfs |
| Name | U-Boot device | Linux device | Offset (blocks) | Size | Comment |
|---|---|---|---|---|---|
| Boot | mmc 0:1 | /dev/mmcblk2p1 | 2048 (0x800) | 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 | (0x18800) | Rest of space (<3816448 blocks) | the rootfs is on this partition (ext4 formatted) |
