| AMDCCP(4) | Device Drivers Manual | AMDCCP(4) | 
amdccp —
amdccp* at pci?
amdccp driver provides support for cryptographic
  coprocessors found on certain AMD CPUs. The coprocessor supports hardware
  offloading for common cryptographic algorithms and a True Random Number
  Generator (TRNG).
Currently, this driver only supports providing additional entropy to the kernel's random number generator.
amdccp device driver appeared in
  NetBSD 9.0.
| July 25, 2021 | NetBSD 9.4 |