Table of Contents

Partition scheme

Changing the partition scheme may affect the boot loader update capability and / or the kernel command line parameters!

SD / eMMC images

BSP REV.0110
Sector Size Usage
0x0000 … 0x0000 0x0001 sector / 512 Byte MBR / Partition Table
0x0001 … 0x0001 0x0001 sector / 512 Byte reserved for ROM loader 1)
0x0002 … 0x07ff 0x07fe sectors / 1023 KiB u-boot
0x0800 … 0x0fff 0x0800 sectors / 1MiB environment 2)
Partition Size Usage
1 20 MiB Firmware partition 3)
2 256 MiB root FS
3 256 MiB Spare, not formatted
4 —- —-

BSP REV ≤ 0109

The partition scheme is defined using the config file <BSP_ROOT>config/platform-tq-mba6x/config/images/uboot-hd.config. The creation of the image is controlled using the PTXdist packages image-uboot-tqma6<q|s>-hd.make, these packages are located at <BSP_ROOT>/configs/platform-tq-mba6x/rules/.

To create the image the genimage host tool is used. This tool is automatically selected and built. You can find the build directory under <BSP_ROOT>/platform-MBa6x/build-host/genimage. There is also a README file documenting how to use this tool.

SPI NOR

Sector Size Usage
0x0000 … 0x0007 0x0008 sectors / 512 KiB U-Boot 4)
0x0008 … 0x0008 0x0001 sector / 64 KiB environment0
0x0009 … 0x0009 0x0001 sector / 64 KiB environment1
0x000b … 0x000f 0x0005 sectors / 320 KiB devicetree
0x0010 … 0x0070 0x0060 sectors / 6 MiB Kernel

*) See CPU reference Manual. The U-Boot image must be placed at offset 0x400

1)
See CPU reference Manual. This sector can be used for Redundant Boot Support
2)
Environment organisation:
* configured environment size: 8kiB (16 Sectors)
* environment type: redundand
* primary environment (sectors): 0x0800 … 0x080f (0x100000 … 0x101fff)
* redundand environment (sectors): 0x0810 … 0x081f (0x102000 … 0x103fff)
3)
Firmware partitions contains all device tree blobs and Linux kernel image
4)
See CPU reference Manual. The U-Boot image must be placed at offset 0x400