This document provides a comprehensive overview of the partitions of all boot devices on SP7350 platform. The SP7350 platform supports 5 boot devices, including SPI-NOR flash, SPI-NAND flash, 8-bit NAND flash, eMMC device, and SD card.
Table of Contents
Table of Contents |
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SPI-NOR Flash
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Partition | Size | Descriptions |
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nand_header | 1 block | header of the NAND flash |
xboot1 | Actual size of image | image of x-boot, including training firmware of DDR |
uboot1 | Actual size of image | image of U-Boot (factory default) |
uboot2 | Actual size of image | image of U-Boot (the latest update) |
fip | 2 MB | image of fip, including TF-A and OP-TEE |
env | 512 kB | image of environment variable of U-Boot |
env_redund | 512 kB | image of environment variable of U-Boot (redundant) |
dtb | 256 kB | image of device-tree blob (not used) |
kernel | 25 MB | image of Linux kernel with U-Boot header |
rootfs | Depend on size of flash | image of ubifs root file-system |
It is essential to ensure that the combined size of the nand_header, xboot1, uboot1, and uboot2 partitions does not exceed 4 MB. This constraint is crucial as the fip partition initiates at a 4 MB offset.
If a 128MB, 512MB, or any other size NAND flash is utilized, the size of the rootfs partition will dynamically adjust to either shrink or extend to occupy the space available on the NAND flash up to its full capacity. However, the sizes of other partitions will remain unchanged.
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