* interrupts: Less pessimistic synchronization for the different interrupt types. There are some issues with the interrupt number assignments.
* interrupts: Allow an option to NOT synchronize all the external interrupts coming into PLIC
* interrupts: ExampleRocketChipTop uses PeripheryAsyncExtInterrupts. Realized 'abstract' doesn't do what I thought in Scala.
* interrupts: use consistent async/periph/core ordering
* interrupts: Properly condition on 0 External interrupts
* interrupts: CLINT is also synchronous to periph clock
* debug: Bump OpenOCD version to one that drives resets and sets cmderr appropriately.
* debug: Export the dmactive and ndreset signals to the top level and drive reset as intended in the TestHarness.
VCS is not free. Neither is the vcd format.
Fortunately, verilator and gtkwave ARE free ... and faster too.
This patch adds targets:
run-regression-tests-fst
run-asm-tests-fst
... which create opensource-compatible fst waveforms for gtkwave.
Fundamental new features:
* Added tile package: This package is intended to hold components re-usable across different types of tile. Will be the future location of TL2-RoCC accelerators and new diplomatic versions of intra-tile interfaces.
* Adopted [ModuleName]Params convention: Code base was very inconsistent about what to name case classes that provide parameters to modules. Settled on calling them [ModuleName]Params to distinguish them from config.Parameters and config.Config. So far applied mostly only to case classes defined within rocket and tile.
* Defined RocketTileParams: A nested case class containing case classes for all the components of a tile (L1 caches and core). Allows all such parameters to vary per-tile.
* Defined RocketCoreParams: All the parameters that can be varied per-core.
* Defined L1CacheParams: A trait defining the parameters common to L1 caches, made concrete in different derived case classes.
* Defined RocketTilesKey: A sequence of RocketTileParams, one for every tile to be created.
* Provided HeterogeneousDualCoreConfig: An example of making a heterogeneous chip with two cores, one big and one little.
* Changes to legacy code: ReplacementPolicy moved to package util. L1Metadata moved to package tile. Legacy L2 cache agent removed because it can no longer share the metadata array implementation with the L1. Legacy GroundTests on life support.
Additional changes that got rolled in along the way:
* rocket: Fix critical path through BTB for I$ index bits > pgIdxBits
* coreplex: tiles connected via :=*
* groundtest: updated to use TileParams
* tilelink: cache cork requirements are relaxed to allow more cacheless masters
We want to keep the banks split in the outer SoC if there is an L3.
Furthermore, each channel might go to different memory subsystems,
like DDR/HMC/Zero, from rocketchip.
