This reverts commit 2349460e.

- REQUIRES V5 DEV BRANCH WRPC-SW
- syscon diag registers (read-write) are now remapped at offset (periph + 0x900)
- user diag registers are at the previous address (periph + 0x800), keeping the legacy layout
- the new scheme uses much less FF/LUT resources and allows adding arbitrary diagnostics without affecting the SYSCON layout or HDL modifications

Maciej Lipinski authored 7 years ago and Grzegorz Daniluk committed 7 years ago

this is an hdl part of new (additional) diagnostics for WR PTP Core.
It allows to access diagnostics values through WB registers (e.g. PCI
bus). This is useful for integration of WR with CERN cotrols infrastructure,
such as FESA. It allows the host machine (of SPEC/SVEC/etc) to easily
access information about the health of WR PTP Core.