The partition header contains details of the partition and is described in the table below.
| Offset | Name | Description |
|---|---|---|
| 0x0 | Partition Data Word Length | Encrypted partition data length |
| 0x4 | Extracted Data Word Length | Unencrypted data length |
| 0x8 | Total Partition Word Length (Includes Authentication Certificate) | The total encrypted + padding + expansion + authentication length |
| 0xC | Next Partition header offset | Offset of next partition header |
| 0x10 | Destination Execution Address (Lower Half) | The lower 32 bits of the executable address of this partition after loading. |
| 0x14 | Destination Execution Address (Higher Half) | The higher 32 bits of the executable address of this partition after loading. |
| 0x18 | Destination Load Address (Lower Half) | The lower 32 bits of the RAM address into which this partition is to be loaded. For elf files Bootgen will automatically read from elf format. For RAW data users has to specify where to load it. For CFI and configuration data it should be 0xFFFF_FFFF |
| 0x1C | Destination Load Address (Higher Half) | The higher 32 bits of the RAM address into which this partition is to be loaded. For elf files Bootgen will automatically read from elf format. For RAW data users has to specify where to load it. For CFI and configuration data it should be 0xFFFF_FFFF |
| 0x20 | Data Word Offset in Image | The position of the partition data relative to the start of the boot image. |
| 0x24 | Attribute Bits | See Partition Attributes Table |
| 0x28 | Section Count | If image type is elf, it says how many more partitions are associated with this elf. |
| 0x2C | Checksum Word Offset | The location of the checksum word in the boot image. |
| 0x30 | Partition ID | Partition ID |
| 0x34 | Authentication Certification Word Offset | The location of the Authentication Certification in the boot image. |
| 0x38 – 0x40 | IV | IV for the secure header of the partition. |
| 0x44 | Encryption Key select |
Encryption status:
|
| 0x48 | Black IV | IV used for encrypting the key source of that partition. |
| 0x54 | Revoke ID | Partition revoke ID |
| 0x58-0x78 | Reserved | 0 |
| 0x7C | Header Checksum | A sum of the previous words in the Partition Header |
The following table lists the partition header table attributes.
| Bit Field | Name | Description |
|---|---|---|
| 31:29 | Reserved | 0x0 |
| 28:27 | DPA CM Enable |
0 – Disabled 1 – Enabled |
| 26:24 | Partition Type |
0 – Reserved 1 - elf 2 - Configuration Data Object 3 - Cframe Data (PL data) 4 – Raw Data 5 – Raw elf 6 – CFI GSR CSC unmask frames 7 – CFI GSR CSC mask frames |
| 23 | HiVec |
VInitHi setting for RPU/APU(32-bit) processor 0 – LoVec 1 – HiVec |
| 22:19 | Reserved | 0 |
| 18 | Endianness |
0 – Little Endian (Default) 1 – Big Endian |
| 17:16 | Partition Owner |
0 - PLM (Default) 1 - Non-PLM 2,3 – Reserved |
| 15:14 | PUF HD location |
0 - eFuse 1 - Boot header |
| 13:12 | Checksum Type |
000b - No Checksum(Default) 011b – SHA3 |
| 11:8 | Destination CPU |
0 – None (Default for non-elf files) 1 - A72-0 2 - A72-1 3 - Reserved 4 - Reserved 5 - R5-0 6 - R5-1 7- R5-L 8 – PSM 9 - AIE 10-15 – Reserved |
| 3 | A72 CPU execution state |
0 - Aarch64 (default) 1 - Aarch32 |
| 2:1 | Exception level (EL) the A72 core should be configured for |
00b – EL0 01b – EL1 10b – EL2 11b – EL3 (Default) |
| 0 | TZ secure partition |
0 – Non-Secure (Default) 1 – Secure This bit indicates if the core that the PLM needs to configure (on which this partition needs to execute) should be configured as TrustZone secure or not. By default, this should be 0. |