Axi4 passive vip and scoreboard

[csabakiss-semify]

1. Developed AXI4 VIP supporting passive mode only
2. VIP integrated to the top level environment
3. Added scoreboard to the AXI XBAR

[martin-velay]

Thanks Csaba, before I dive into the code itself, I have some general comments. We try to make our database being more or less homogeneous with the rest of lowRISC code. My comments are a bit random, it's what I can see from a first glance:

• Add header to each files like:

  mocha/hw/top_chip/dv/tb/tb.sv

  Lines 1 to 3 in f3c8cf2

  	// Copyright lowRISC contributors (COSMIC project).
  	// Licensed under the Apache License, Version 2.0, see LICENSE for details.
  	// SPDX-License-Identifier: Apache-2.0

• Rename axi4_vip_config into axi4_vip_cfg
• Rename axi4_vip_transaction into axi4_vip_item
• Adopt external methods as much as possible like what I've done for the HMAC for example
• Add labels at the end of each function/task/class
• Maybe remove the UVC directory
• The short for scoreboard is mostly scb (and not scbd)
• The name of top_chip_dv_axi_scbd should be top_chip_dv_axi_scoreboard
• The end else begin of if statements should be on the same line
• It would be better to have all in lower cases here m_axi_MST0
• The typedef are always names with _t, so this t_axis should become axis_t
• When you name your commits you need to give between the [ ] the related block or thing you do. It can be the name of the block followed by the domain, like: [axi,dv], [axi,rtl], [top,dv], [top,script]... If you have a fix you should amend your commit. And your commit list needs to be logically arranged as most of the people will review it commit by commit in order.

I think it's enough to start with. You can also take a look at this repository and maybe ask AI to help you fixing some more things I haven't spotted yet: https://github.com/lowRISC/style-guides/tree/master

[csabakiss-semify]

I believe, the requested changes are applied. I do not know why the lint check fails. Please letme know if further modifications are required.

[martin-velay]

I believe, the requested changes are applied. I do not know why the lint check fails. Please letme know if further modifications are required.

Thanks Csaba, I'll take a look at the PR more in depth today.
About the CI you can see the reason by clicking here:

And then you'll see:

[csabakiss-semify]

I mean, I can see the error message, but the referenced file has exactly the same header as the others.

[martin-velay]

So far I have reviewed all the files under top_chip/dv except the scoreboard.

[csabakiss-semify]

Also, I rebased to the latest main branch and uart_smoke test fails due to a AXI scoreboard issue. Checking...

[csabakiss-semify]

Due to mocha repo went public, I lost the connection to the origin, therefore I indirectly closed this PR by deleting the head repo. New PR is expected soon with all the requested changes and passing tests.

[martin-velay]

New PR is available here #391