[hw,entropy_src,rtl] Make noise source data width parametrizable

[Razer6]

This PR makes the RNG data path from the entropy source to the external noise source (AST) parametrizable in the bit width. To do so, the struct defining the interface is removed and explicit signals for each field are added to allow the parametrization of the data width. The same is done for the external health test. Here only data and valid are moved out of the struct.

• Update bit sel register
• Instantiate bucket health test per 4-bit
• Update AST interface
• Parametrize the DV environment
• Bump Version number

[Razer6]

@vogelpi @andreaskurth Thanks for the review. I added your comments and also implemented a single counter for the bucket test. CI is also almost happy. Could you take another look? Regarding the version bump, I leave that as it is now. It is similar to other IP changes, so nothing critical I think.

[Razer6]

The full regression suite of entropy_src has been run. Their pass rate is now similar to a full run on the master branh.

[andreaskurth]

A few small comments, but LGTM after those. Thx @Razer6!

[andreaskurth]

Regarding the version bump, I leave that as it is now. It is similar to other IP changes, so nothing critical I think.

The version should be incremented before the changes. Otherwise, the changes would technically still be part of the prior version. Could you please make the version bump commit the first commit in this PR?

[Razer6]

Thanks @andreaskurth I added your requests and moved the version number to the beginning of the series of commits. Let's get that merged :)

[vogelpi]

This looks good to me, except for the version increment which needs to be moved to the correct IP core (ENTROPY_SRC) :-)

[vogelpi]

Thanks @Razer6 !

[andreaskurth]

CHANGE AUTHORIZED: hw/ip/entropy_src/data/entropy_src.hjson
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_cntr_reg.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_core.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_pkg.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_reg_pkg.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_reg_top.sv

^ Changes to add support for configurable entropy bit widths, which lead to a bump of the major version (now 3.0.0) of the IP.

CHANGE AUTHORIZED: hw/top_earlgrey/data/top_earlgrey.hjson
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/chip_earlgrey_asic.sv
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/top_earlgrey.sv

^ No functional changes; structural changes to connect entropy_src ports that have been split.

[andreaskurth]

Thanks @Razer6!

[vogelpi]

CHANGE AUTHORIZED: hw/ip/entropy_src/data/entropy_src.hjson
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_cntr_reg.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_core.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_pkg.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_reg_pkg.sv
CHANGE AUTHORIZED: hw/ip/entropy_src/rtl/entropy_src_reg_top.sv

^ Changes to add support for configurable entropy bit widths, which lead to a bump of the major version (now 3.0.0) of the IP.

CHANGE AUTHORIZED: hw/top_earlgrey/data/top_earlgrey.hjson
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/chip_earlgrey_asic.sv
CHANGE AUTHORIZED: hw/top_earlgrey/rtl/autogen/top_earlgrey.sv

^ No functional changes; structural changes to connect entropy_src ports that have been split.