Adding new sparta unit : L2Cache

[Kunal-Buch]

• Create a new sparta unit for L2Cache that received requests from IL1 and DL1 and sends requests out to BIU for the misses in L2Cache.
• L2Cache can handle multiple outstanding/pending misses and supports out-of-order returns from BIU.
• Separate ports for acks/credits and responses for DL1, IL1 and BIU.

[ghost]

An example of CycleCounter/stall counting:

riscv-perf-model/core/Dispatch.hpp

Line 132 in 82504f6

std::array<sparta::CycleCounter, N_STALL_REASONS> stall_counters_{{

Presentation on Sparta, including example of how to handle multiple inputs and choose one output:
https://docs.google.com/presentation/d/e/2PACX-1vS1BWtVv0x3qXKQWAeECe2gsF9cMG3Zp2HnXJw52grCAcl21lv3a9pLW6J0lZ32e5DWdZkFyUMcE_AI/pub?start=false&loop=false&delayms=3000

Move forward to "Ordered Scheduling"

[Kunal-Buch]

Thanks Knute! :)

I have updated the model for the backpressure handling when the buffers are full.
I also have the make regress clean with the couple of tests added for the L2Cache.

Do I need permissions to create a remote branch and create a PR?

[ghost]

You can open a PR here that references your fork of Olympia. Once done, we will receive a note to enable CI and then we'll look it over. Thanks for contributing!

[zhynsb]

Hi, guys

Could you write a README to run tests with L1+L2 system?

Thanks :)