The Intel Quartus Prime Programming File Generator allows you to create many user partitions. These partitions can contain
application images and other items such as the Second Stage Boot Loader (SSBL), Linux* kernel, or Linux root file system.
When you create the initial flash image, you can create up to seven partitions for application images. There are no limitations
on creating empty partitions.
5.4.2.2. Sub-Partition Table Layout
The following table shows the structure of the sub-partition table. The Intel Quartus Prime Programming File Generator
software supports up to 126 partitions. Each sub-partition descriptor is 32 bytes.
Note: The firmware never updates the SPT.
Table 47. Sub-partition Table Layout
Offset Size (in bytes) Description
0x000
4 Magic number 0x57713427
0x004
4 Version number:
• 0 - before Intel Quartus Prime Pro Edition software version 20.4
• 1 - starting with Intel Quartus Prime Pro Edition software version 20.4
0x008
4 Number of entries
0x00C
4 Checksum:
• 0 - before Intel Quartus Prime Pro Edition software version 20.4
• CRC32 checksum - starting with Intel Quartus Prime Pro Edition software version 20.4
0x010
16 Reserved
0x020
32 Sub-partition Descriptor 1
0x040
32 Sub-partition Descriptor 2
0xFE0
32 Sub-partition Descriptor 126
Starting with Intel Quartus Prime Pro Edition software version 20.4, the SPT header contains a CRC32 checksum that is
computed over the whole SPT. The value of the CRC32 checksum filed itself is assumed as zero when the checksum is
computed. Refer to Application Image Layout on page 180 for the algorithm used to compute the CRC32 checksum. The
checksum is provided as a convenience so that SPT corruptions can better be detected by HPS software. By default the
feature is turned off.
5. Remote System Update (RSU)
683673 | 2021.10.29
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