The bitstream authentication system service parses a bitstream image stored in the SPI flash and verifies the integrity of the bitstream. The following table lists the fields in a bitstream authentication service request.
| System Service Descriptor Bit Field | Value | Description |
|---|---|---|
| 15:7 | MBOXADDR[10:2] | Mailbox address. For the format, see Table 2. |
| 6:0 | 23H | Bitstream authentication command code. |
The following table describes the bitstream authentication service mailbox format.
| Offset | Length (bytes) | Parameter | Direction | Description |
|---|---|---|---|---|
| 0 | 4 | SPIADDR | Input | Address of the bitstream in SPI flash. If the external SPI flash device does not support 32-bit addresses, SPIADDR[31:24] is ignored. |