Partition scheme
Changing the partition scheme may affect the boot loader update capability and / or the kernel command line parameters!
The following partition scheme is used for SD / eMMC images
- sector size = 512 Byte
| Sector | Size | Usage | in Partition table |
|---|---|---|---|
| 0x0000 … 0x0001 | 0x0002 sectors / 1kiB | MBR / Partition table | |
| 0x0002 … 0x0002 | 0x0001 sector / 512 B | U-Boot environment | |
| 0x3000 … 0x3FFF | 0x1000 sectors / 2MiB | device tree blob | |
| 0x4000 … 0x7FFF | 0x4000 sectors / 8MiB | U-Boot partition (!) | * |
| 0x8000 … 0xBFFF | 0x4000 sectors / 8MiB | Kernel partition | * |
| 0xC000 … 0x2BFFF | 0x20000 sectors / 64 MiB | RootFS partition | * |
| 0x2C000…0xABFFF | 0x80000 sectors / 256 MiB | free to use partition (!!) | * |
(!) The Freescale tool (sdimage) used to create the SD/eMMC image writes two copies of U-Boot to this partition. The secondary copy starts at the sector following the last sector of the primary copy. Therefore no absolute addresses can be given.
(!!) Currently only SD/eMMC images implement this partition. MfgTool profiles do not yet create this partition.
The partition scheme is defined for platforms TQMa28/TQMa28L/TQMa28-fsl using the config file
<BSPROOT>/configs/platforms/tqma28/tqma28/config/images/tqma28-hd.config
The creation of the image is controlled using the project local PTXdist package image-hd2. To create the image the genimage host tool is used. This tool is automatically selected and built. You can find the build directory under <BSPROOT>/platform-<tqma28-fsl | tqma28>/build-host/genimage. There is also a README file documenting how to use this tool and the config file.
TQ-Systems GmbH provides the Board Support Packages (BSP) free of charge. The software included in the shipment has been configured individually for the starter kits. The software is only intended to evaluate the module. The use of the Board Support Packages (BSP) is only allowed within the scope of functionality described by TQ-Systems GmbH. TQ-Systems GmbH does not accept any liability for all further changes of the Board Support Package and for any damage resulting from its use.