Zynq-7000 SoC Image Header - 2021.2 English

Bootgen User Guide (UG1283)

Document ID
Release Date
2021.2 English

The Image Header is an array of structures containing information related to each image, such as an ELF file, bitstream, data files, and so forth. Each image can have multiple partitions, for example an ELF can have multiple loadable sections, each of which forms a partition in the boot image. The table will also contain the information of number of partitions related to an image. The following table provides the address offsets, parameters, and descriptions for the Zynq®-7000 SoC device.

Table 1. Zynq-7000 SoC Image Header
Address Offset Parameter Description
0x00 Next Image Header. Link to next Image Header. 0 if last Image Header (word offset).
0x04 Corresponding partition header. Link to first associated Partition Header (word offset).
0x08 Reserved Always 0.
0x0C Partition Count Length Number of partitions associated with this image.
0x10 to N Image Name Packed in big endian order. To reconstruct the string, unpack 4 bytes at a time, reverse the order, and concatenate. For example, the string “FSBL10.ELF” is packed as 0x10: ‘L’,’B’,’S’,’F’, 0x14: ’E’,’.’,’0’,’1’, 0x18: ’\0’,’\0’,’F’,’L’ .

The packed image name is a multiple of 4 bytes.

N String Terminator 0x00000000
N+4 Reserved Defaults to 0xFFFFFFFF to 64 bytes boundary.