System Service Questions

[tpearman353]

1. I'm not seeing matching digests for the "fabric digest" when comparing digest returned by Read Digests service and digest displayed in Libero. Is there any trick to reading the digest correctly from the system service mailbox?

2. There are two bitstream authentication services, "Bitstream Authentication Service" (0x23) and "IAP Image Authentication Service " (0x22). Is there a difference in what/how it authenticates besides one takes a SPI address and other a SPI index argument? The descriptions for each are different, but maybe saying same thing.

3. Is there a way for MSS to determine Part #/ID? And if so, is there a list somewhere of expected Part IDs somewhere? I've seen a DEVICE_ID register in the register map that has a 20-bit value, but not sure how to use it