CHANGELOG.md

Changelog

Future Release

Some highlights to be included in the next release:

• Bump to chisel 3.5.4 (chipsalliance#3105)

• As Chisel compatability layer is being sunset, update chisel2 legacy code to chisel3 (chipsalliance#3097)

• Removal of RocketTilesKey and RocketCrossingKey (chipsalliance#3133)

Version 1.6.0

10 Oct 2022

Added

• Bump to Chisel 3.5.3 (chipsalliance#2931, chipsalliance#2937, chipsalliance#2947, chipsalliance#3005)
• Support for Scala 2.12.15 (chipsalliance#2947)
• Properly-sized don't cares for FPU typeTag fields (chipsalliance#2949)
• Add a virtual argument to TLBEntry.sectorHit function (chipsalliance#2952)
• Support building PTW with no PTECache (chipsalliance#2962)
• Update IncoherentBusTopology to support multiclock and custom clocking (chipsalliance#2940)
• Allow forcing RocketTiles into separate PRCI groups (chipsalliance#2842)
• Add a WithHypervisor config (chipsalliance#2946)
• Add ScalaDoc documentation for I$ (chipsalliance#3001)

Changed

• AHPParameters and APBParameters:
  • PROT_PRIVILEDGED - This was a typo. It is now PROT_PRIVILEGED. (chipsalliance#2925)
• GrountTestTile: use generic BuildHellaCache key (chipsalliance#2919)
• copy EICG wrapper from vsrc when using Clock Gate Model (chipsalliance#2969)
• PTW page fault instead of access exception if PTE reserved bit set (chipsalliance#2913, chipsalliance#2934)
  • PTE_RSVD was introduced into Spike in riscv-software-src/riscv-isa-sim#750
  • Reserved PTE bits report page fault instead of access exception.
  • Add an additional bit pf to PTWResp and TLBEntryData to pipe this through.
• Have HFENCE.GVME sfence.bits.hg=1, hv=0 only target TLB entries with V=1 (and not V=0) (chipsalliance#2954)
• Update Instructions from riscv-opcodes and separate out rocket-specific custom instructions (chipsalliance#2956, chipsalliance#2972)
  • post riscv-opcode instruction category scheme at this PR riscv/riscv-opcodes#106
• Decode: switch to using Chisel Decode API (chipsalliance#2836, chipsalliance#2994)
• Convert toaxe.py to python3 (chipsalliance#3034)
• make AsyncClockGroupsKey a node generator (chipsalliance#2935)
• change debug module name to tlDM (chipsalliance#3029)
• As part of a larger migration begin refactoring files to chisel3:
  • ALU.scala (chipsalliance#3039)
  • AMOALU.scala (chipsalliance#3040)
  • Breakpoint.scala (chipsalliance#3041)
  • PMP.scala (chipsalliance#3042)
  • FormalUtils.scala (chipsalliance#3044)
  • Decode.scala (chipsalliance#3049)
  • Consts.scala (chipsalliance#3052)

Fixed

• Proper translation to HRProt3 in AHB Protocol (chipsalliance#2928)
• Assert HasFSDirty false (chipsalliance#2997)
• VSStatus is now read-only and dirty when RoCC is enabled (chipsalliance#2984)
• RocketCore: avoid false RAW/WAW hazards for integer instructions using an x register whose numeric specifier coincides with a previous instruction's f register. (chipsalliance#2945)
• Correct rocc_illegal to use reg_vsstatus.xs field (chipsalliance#2983)
• Zero out aux_pte.reserved_for_future whenever aux_pte.ppn is driven (chipsalliance#3003)
• Prevent ILTB miss fault PTW thrashing D$ (chipsalliance#3004)
• Prevent nonsensical use of RVE with Hypervisor (chipsalliance#2988)
• Explicity outline Rocket's lack of support for haveFSDirty (chipsalliance#2997)
• Fix bit-width out of range issue when both Sv57 and Hypervisor are enabled (chipsalliance#3006)
• Fix synthesizability of RoccBlackBox with Vivado (chipsalliance#3035)

Removed

• Remove Object Model from Diplomacy (chipsalliance#2967)
• Removed RegEnable explicit arguments in preparation for changes in Chisel 3.6 (chipsalliance#2986)
• Removed all mentions of Travis CI and .travis.yml file (chipsalliance#2647)
• Remove TraceGen from `HeterogeneousTileExampleConfig (chipsalliance#2923)

Version 1.5.0

18 Jan 2022

Added

• Chisel 3.5 support
• Hypervisor extension (chipsalliance#2841):
  • Introduce virtualization of hart id for virtualized supervior OSs and virtualized user modes
  • More work to be done on interrupt controllers, IOMMUs, etc.
• Fault if reserved bits D/A/U of page table entry are set to 1 (chipsalliance#2895)
• mnie bit added to mnstatus (chipsalliance#2904)
• WithCoherentBusTopology added to BaseFPGAConfig (chipsalliance#2787)
• Add support for timebase-frequency in the cpus node of the Device Tree (chipsalliance#2782)
• Support incoherent access to ExtMem Bus through SBus (chipsalliance#2978)

Changed

• TLToAXI4: b-channel acks are now stalled for if blocked for 7 consecutive cycles (chipsalliance#2805)
• Cacheable ROMs: treat acquire-able read-only memory as cacheable (chipsalliance#2808)
• Modularly wrap the value of nextSelectEnc in the ReadyValidCancelRRArbiter when Round-Robin parameters are rr=true && !isPow2(n) (chipsalliance#2798)
• Changed TLMonitor to check the correct opcode for a (so far unused) B channel Get message (chipsalliance#2788)
• D$: drive Tilelink C-Channel AMBA_PROT bits last (chipsalliance#2770)

Fixed

• PTW and TLB fault prioritization:
  • Misaligned faults (chipsalliance#2926):
    • We cannot check if the memory address has side effects to take a misaligned exception if a PTW doesn't finish within a valid PTE.
    • Therefore, misaligned faults are now given lowest priority.
  • Access exceptions (chipsalliance#2916):
    • Separate access faults into faults for accessing Page Table Entries and faults for bad Physical Page Numbers.
• Hoist r_valid_vec onto a register before L2TLB refill wmask (chipsalliance#2868 chipsalliance#2856)
• Dedpulicate to one OptimizationBarrier per TLBEntry (chipsalliance#2833)
• D$: block until ReleaseAck from slave acknowledging completion of writeback (chipsalliance#2832)
• dtim: convert PutPartials to PutFulls when mask is full to avoid RMW (chipsalliance#2822)
• dtim: don't let dmem.req.bits.cmd become X which causes X-prop (chipsalliance#2818)
• Jam WidthWidget until write to prevent leaking of X output (chipsalliance#2815)
• Don't cover non-existent U-mode counters (chipsalliance#2817)
• Supress SCIE assertion when instruction not valid (chipsalliance#2816)
• Fixed an issue where store fails to take effect if it is immediately followed by a load to the same address under an ECC error condition (chipsalliance#2804)
• ReadyValidCancelRRArbiter: fixed an issue where round-robin select rotated incorrectly when rr=true (chipsalliance#2771)
• TraceGen: now observes dmem.ordered when attempting a fence (chipsalliance#2779)

Removed

• Remove unrecoverable non-maskable interrupts (chipsalliance#2904)
• Remove wake support (chipsalliance#2847)
• Remove ability to build Chisel/FIRRTL from source

Additional Notes

• regmapper: update all regmap tests
• tilelink: buswrapper leave fromPort

Version 1.4.0

19 Dec 2020

RC has undergone two years of development since the last version update. The changelog for this version of RC is non-extensive. The changelog for this version is merely illustrative of the features added since the 1.2~1.3 releases. No API compatibility is guaranteed between minor version releases of RC. Future versions of the changelog should follow the format here https://keepachangelog.com/en/1.0.0/

• Chisel 3.4.x and FIRRTL 1.4 compatible.
  • Rely on building from source by default (chipsalliance#2617)
  • bump to 3.4.0 and FIRRTL 1.4.0 (chipsalliance#2694)
• Verilator 4.028 compatible (chipsalliance#2377)
• submodules
  • torture https://github.com/ucb-bar/riscv-torture/tree/77195ab12aefc373ca688e0a9c4d710c13191341
  • hardfloat https://github.com/ucb-bar/berkeley-hardfloat/tree/01904f99ed3ad26cdbe2876f638d63e30e7fecdc
  • cde https://github.com/chipsalliance/cde/tree/fd8df1105a92065425cd353b6855777e35bd79b4
  • if building from source for firrtl and chisel:
    • firrtl: https://github.com/chipsalliance/firrtl/tree/7756f8f9634b68a1375d2c2ca13abc5742234201
    • chisel: https://github.com/chipsalliance/chisel3/tree/58d38f9620e7e91e4668266686484073c0ba7d2e
• scala 2.12.10
• scalatest 3.2.0
• json4s-jackson 3.6.1

PR Release Notes

Rocket

• [CSR] add vcsr and move vxrm/vxstat from fcsr to that register set (chipsalliance#2400, chipsalliance#2422)
• [CSR] disallow writes to MSTATUS.XS (chipsalliance#2508)
• [CSR] expand TracedInstruction.cause to xLen (chipsalliance#2548)
• [CSR][mstatus] implement updated MPRV from priv-1.12 (chipsalliance#2206)
• [CSR] add `mcountinhibit from priv-1.11 (chipsalliance#2693)
  • ignore PAUSE when mcountinhibit(0) === 1 (chipsalliance#2700)
• [CSR] Comply with priv spec by resetting and initializing mcause to 0 (chipsalliance#2333)
• [events] add SuperscalarEventSets (chipsalliance#2337, chipsalliance#2506)
• [events] make fields public for tapping signals (chipsalliance#2464, chipsalliance#2524)
• [i$] fix ccover bug to cover all beats of D channel corruption chipsalliance#2755
• [d$] updates
  • fix elaboration with < 4 MiB of physical address space (chipsalliance#2367)
  • guarantee no-alloc accesses are ordered even if aliased (chipsalliance#2358)
  • [ecc] fixed a rare bug where under the right conditions stores to the same word resulted in one store detecting an error while the other does not (chipsalliance#2458)
  • [HellaCache] introduce subWordBits param to support subbanking (chipsalliance#2645)
  • support specifying cache index when aliasing is possible (chipsalliance#2697, chipsalliance#2730)
  • reduce latency on inclusion and coherence misses by allowing D$ to voluntarily release (aka "noisy drop") cache lines (chipsalliance#2696)
    • follow-up to fix deadlock (chipsalliance#2714)
    • follow-up to fix performance (chipsalliance#2739)
• distinguish a supervisor mode that does not use MMU/VM (chipsalliance#2422, chipsalliance#2499)
• [hartid]
  • fixed an issue where the Rocket core's placement would be impacted by non-constant hartid (chipsalliance#2432)
  • add a diplomatic node for assigning hartid (chipsalliance#2447)
• [Replacement][PseudoLRU] fix performance issue with PseudoLRU for replacements when number of ways is not a power of 2 (chipsalliance#2493, chipsalliance#2498)
• [Replacement][d$] configure replacement policy with parameter to indicate wheteher policy is used on a per-set basis or a global basis (chipsalliance#2656)
• [PTW]
  • replace round robin arbitration with static arbitration (chipsalliance#2433)
  • fixed a bug where an L2TLB write would almost always block the next L2TLB search when MMU and clock gating were enabled (chipsalliance#2601)
  • wait for L2TLB to refill before searching (chipsalliance#2619)
  • [PTWPerfEvents] add (unused) Performance Monitor Events for L2TLB hit and PTE Cache Miss/Hit (chipsalliance#2668, chipsalliance#2688, chipsalliance#2692)
  • enable configurable set-associtive L2 TLB (chipsalliance#2748, chipsalliance#2753)
    • default configuration is direct-mapped
• enable Sv48 setting page levels equal to 4 (chipsalliance#2434)
• [PMP] remove NA4 coverpoint for pmp granularity > 4 (chipsalliance#2625)
• [TLB]
  • check PutPartial support separately from PutFull (chipsalliance#2503)
  • fix a rare refill/invalidate race condition (chipsalliance#2534)
  • configure L1 D/I TLBs by set, entry, and replacement policy (chipsalliance#2574, chipsalliance#2621)
  • add params nTLBBasePageSectors and nTLBSuperpages for both I and D TLBs (chipsalliance#2595)
• [CoreMonitor]
  • add privilege mode and exception signals (chipsalliance#2387)
  • now prints only retired instructions (chipsalliance#2372)
  • separate wren into wrenx/wrenf for integer/float (chipsalliance#2423)
  • Add [CoreMonitorBundle] for [FPU] floating point registers (chipsalliance#2538, chipsalliance#2541, chipsalliance#2546, chipsalliance#2589)
• [FPU] Zfh extension, option for Half-Precision unit (chipsalliance#2723)
  • replaces singleIn and singleOut with typeTagIn and typeTagOut
• preliminary RV32Zfh extension support (chipsalliance#2359)
• [RVV] -> 0.9 -> 1.0 (chipsalliance#2477, chipsalliance#2484, chipsalliance#2396, chipsalliance#2552, chipsalliance#2576)
  • Fractional LMUL
  • Tail-agnostic/mask-agnostic bits
  • EEW loads/stores
  • Some encoding changes
  • tighten fractional LMUL-SEW constraint
  • Instructions: add new and update RISC-V vector extension opcodes
  • reorder fields in vtype
• add B extension opcodes and object model description (chipsalliance#2678)
• fixed an issue where multiplierIO was unclonable (chipsalliance#2331)

Devices

• [PLIC] add support for PLIC elaboration even when nDevices == 0 (chipsalliance#2351)
• [PLIC] fix off-by-one for priority register description (chipsalliance#2718)
• [BuildInDevices] introduce case class parameters to Zero and Error device (chipsalliance#2684)
  • make instantiation of buffers optional
  • allow for optional instantiation of CacheCork
• [BasicBusBlocker] convert to chisel3, add scala-doc, add factory companion object (chipsalliance#2630)
• [PhysicalFilter] added scaladoc and RegFieldDesc (chipsalliance#2685)
• [BEU]
  • added a Device Tree description for the bus error unit (chipsalliance#2373)
  • report Corrupt+Denied on I-Fetch (chipsalliance#2482)

PRCI

• [ResetSynchronizer][ClockGroupResetSynchronizer] add a pair of diplomatic reset synchronizers (chipsalliance#2666)
  • replaced IdentityNodes with AdapterNodes (chipsalliance#2689)
• wrap Tiles in PRCI Domains (chipsalliance#2550)
  • contains logic related to power, reset, clock, and interrupt
• define ResetCrossingType and use with BlockDuringReset in TilePRCIDomain (chipsalliance#2641)
  • analogous to ClockCrossingType. Currently, there are two crossing types: NoResetCrossing and StretchedResetCrossing(cycles: Int)
  • introduces Blockable util
• Synchronizer primitive changes (chipsalliance#2212)
  • introduction of ClockCrossingReg
  • _SynchronizerShiftReg requires synchronizer depth > 1
  • deprecate IntXing and IntSyncCrossingSink
  • deprecate SyncResetSynchronizerShiftReg
• [SynchronizerPrimitiveShiftReg] correct the dedup behavior for the *ResetSynchronizerPrimitiveShiftReg so you only end up with one copy (chipsalliance#2547)
• add partial multiple reset scheme support (chipsalliance#2375)
• AsyncResetReg: use chisel3 async resets (chipsalliance#2397)
• Async Reset support for Atomics, FPU, and TLBroadcast (chipsalliance#2362)
• [ResetStretcher][PRCI] add reset stretcher for Async Reset systems (chipsalliance#2566)
• ClockGroupDriverParameters: allow for a configurable drive function for driving asynchronous clock groups with IO other than the implicit clock (chipsalliance#2319)
• [ClockDivider] fixed bug where clock divider's source and sink functions always divided by two (chipsalliance#2610)
• [InterruptBusWrapper] update synchronizer API (chipsalliance#2640)
  • replaces using IntXing in a synchronize method with to and from methods
  • this is to ensure synchronized registers are always put in the destination clock domain

Tile

• [notification] provide reset values for cease and wfi (chipsalliance#2449)
• [notification][CSR] Block wfi, halt, cease, and other valid signals during asynchronous reset (chipsalliance#2611)
  • trace.valid of CSR changed to async-reset delay (chipsalliance#2613)
• [notification][WFI] expose WFI from core (chipsalliance#2315)
• [i$] fixed bug where cease signal was asserted before potential glitching in I$ clock finished. Add an assertion to cease signal. (chipsalliance#2419, chipsalliance#2420, chipsalliance#2456)
• [PMP][DTS] add pmp granularity to DTS (chipsalliance#2661)
• [NMI] introduce non-maskable interrupt implementation (chipsalliance#2711)
• val tiles in trait HasTiles is now populated eagerly via the TilesLocated Field. (chipsalliance#2504)

Subsystem

• [HasTiles] add seipNode (chipsalliance#2665)
• Topology changed from static traits to CDE-based configurable runtime (chipsalliance#2327)
  • HasHierachicalBusTopology trait replaced with two config options:
    • WithCoherentBusTopology
    • WithIncoherentBusTopology
• renamed attachment API to location API (chipsalliance#2330)
• [BundleBridge] to propagate [TileInputConstants]. ROM attachment changes (chipsalliance#2521 merged as chipsalliance#2531)
  • HasPeripheryBootROM and HasPeripheryBootROMModuleImp are removed and replaced by a call to BootROM.attach
  • BootROMParams Field is removed and replaced with BootROMLocated Field
  • MaskROMLocated Field is added
  • SubsystemExternalResetVectorKey, SubsystemExternalHartIdWidthKey and InsertTimingClosureRegistersOnHartIds Fields are added
  • Unused ResetVectorBits Field is removed
  • HasExternallyDrivenTileConstants bundle mixin is removed
  • HasResetVectorWire subsystem trait is removed
  • HasTileInputConstants and InstantiatesTiles subsystem traits are added
  • BaseTile exposes val hartIdNode: BundleBridgeNode[UInt] and resetVectorNode: BundleBridgeNode[UInt] and these are automatically connected to in HasTiles.
  • rocket.Frontend, rocket.ICache, rocket.DCache, rocket.NDCache now have BundleBridgeSink[UInt] for their reset vector or hartid wire inputs.
    • If you instantiate them manually, i.e. not using the traits e.g. rocket.HasHellaCache, you will have to manually connect up those nodes to the aforementioned BaseTile nodes.
  • follow up PR - bug fix for HartID and ResetVector width calcluation (chipsalliance#2543)
• add HierarchicalLocation to LocationAPI (chipsalliance#2346)
• [RocketCrossingParams] relax type of master param to TilePortParamsLike (chipsalliance#2634)
• [Subsystem] Miscellaenous subsystem bus crossing changes (chipsalliance#2724)
  • introduce keys for bus crossings
  • allow for disabling of DriveClockFromMaster behavior
  • introduce MBus crossing to CoherentBusTopology
• [Subsystem][PLIC] avoid using implicit clock (chipsalliance#2719)
• Add an optional TileInputConstant as an MMIO Address Prefix used in ITIM and DTIM hit calculations (chipsalliance#2533)
  • follow-up: fix traceCoreNode duplication issue (chipsalliance#2561)

stage, linting, transforms

• [stage] Fix a bug where unserializable RocketTestSuiteAnnotations were being serialized (chipsalliance#2424)
• [stage] Fix a bug where the desired output file name was being superseded by another phase (chipsalliance#2424)
• [RocketChipStage] Remove emitVerilog, emitFirrtl, and emitChirrtl methods from RocketChipStage (chipsalliance#2481)
• [stage] expose Stage's --target-dir to Config (chipsalliance#2725)
• [Transforms][Lint] add RenameDesiredNames transform and LintConflictingModuleNames Lint rule (chipsalliance#2452)
  • also adds RenameModulesAspect that can be used to emit name overrides and a LintConflictingModuleNamesAspect to collect DesiredNameAnnotations to be checked by the lint pass.
• [ElaborationArtefactAnnotation] add ElaborationArtefactAnnotation - an API similar to ElaborationArtefacts (chipsalliance#2727)
  • this API is for assuring metadata has correct instance paths and signal names
  • allow renames to multiple targets for MemoryPathToken (chipsalliance#2729)

Debug

• mcontext and scontext CSRs for breakpoint qualification (chipsalliance#2588)
• allow a fast debugger reading dmstatus in a single dminner clock cycle to read the proper value (chipsalliance#2412)
• fix address sent from DM to SB2TL (chipsalliance#2559)
• add bus blocker to deny requests to dmInner when dmactive = 0 (chipsalliance#2205)
• DMIToTL: remove PutPartial (chipsalliance#2598)
• convert registers and wires from a Regs of Vector to Regs of UInt (chipsalliance#2597)
• make instantiation of reset synchronizers optional (chipsalliance#2626)
• allow DM at base address other than 0 (chipsalliance#2649)
• [Periphery] workaround an autonaming bug with debug (chipsalliance#2657)
• make nExtTriggers a val for compatibility with cloneType (chipsalliance#2667)
• [BPWatch] have the watchpoint compare to store or load instruction type for matching (chipsalliance#2317)

AMBA, Tilelink

• combine modifiable and cacheable, add read and write alloc fields (chipsalliance#2386)
• [AXI4Deinterleaver][AXI4IdIndexer][AXI4UserYanker][TLToAXI4][Anotations] (chipsalliance#2676)
  • Scala doc
  • Clarifying comments
  • Unify TLToAXI4 metadata code paths into a single path through TLtoAXI4IdMap
  • Make any value of TLToAXI4.stripBits other than 0 illegal and stop using it internally.
  • Remove usage of un-consumed Annotated.idMapping and delete associated application and annotation class.
• [AXI4Deinterleaver] support asynchronous reset (chipsalliance#2479)
• [AXI4Deinterleaver] add buffer when optimized away (chipsalliance#2642, chipsalliance#2652)
• [AXIS] allow masters to carry resources (chipsalliance#2443)
• [SRAM] accomodate address ranges that require more than 32 bits (chipsalliance#2491)
• [SRAM] Add public accessors for SRAM modules (chipsalliance#2646)
• [SimAXIMem] introduce base address argument to constructor )chipsalliance#2628)
• [TLRAM] improved cycle time for designs involving TLRAM (chipsalliance#2582)
• TLMonitors: formal verification support and additional constraints
  • TLVIP2 (chipsalliance#2271, chipsalliance#2505, chipsalliance#2754, chipsalliance#2537, chipsalliance#2573)
  • change isShrink TLPermissions assertion on C channel to isReport (chipsalliance#2675)
• TLEdge: add require failure messages for TL edges (chipsalliance#2313)
• minor tilelink v1 parameter fixes for setName and probe rendering (chipsalliance#2428)
• [TLParameters] add v2 constructors (chipsalliance#2532)
• [TLParameters] functions to look at emits parameters (chipsalliance#2572)
• [Parameters] replace cover function with mincover (chipsalliance#2571)
• [APBToTL] only assert address alignment when data is ready and valid on a-channel (chipsalliance#2314)
• [TLBroadcast][TLSourceShrinker][TLCacheCork][SBA][$] Drive or pass through TL user bits (chipsalliance#2457, chipsalliance#2448, chipsalliance#2383, chipsalliance#2446)
• [TLBroadcast] add API to create Probe filters for Broadcast coherence manager (chipsalliance#2509)
• [TLBroadcast] fixed a Generator bug when instantiated with no inner cache (chipsalliance#2516)
• [TLBroadcast] Add control parameters for control interface (chipsalliance#2519)
• make it possible to filter with Banked Broadcast Hub (chipsalliance#2545)
• [TLSourceShrinker] preserve meta data when no shrinkage is required (chipsalliance#2466)
• [TLFragmenter] ensure Fragmenter raises corrupt signal when raising denied (chipsalliance#2468)
• [Tilelink][Arbiter][Xbar][ReadyValidCancel] Add new API that replaces valid with earlyValid and lateCancel to fix a timing path for A-channel requests (chipsalliance#2480, chipsalliance#2488)
• [TLCacheCork] prevent cache block write size from exceeding read size (chipsalliance#2527)
• [TLCacheCork] switch CacheCork class to take a case class parameter (chipsalliance#2684)
  • with backwards compatible constructor in helper object
• [TLBundle] C channel now has same user bits as A channel (chipsalliance#2632)
  • caches now responsible for driving AMBAProt on C-channel.
• [TLArbiter] add highestIndexFirst arbitration policy (chipsalliance#2587)
• [AHBToTL] retain AHB hrdata even during error response (chipsalliance#2512)
• [AHBToTL] fix spurious fire of assertion on first cycle (chipsalliance#2523)
• [CreditedIO] introduce new DecoupledIO interface for credit debit buffers (chipsalliance#2555)
• [IdMap][IdMapEntry] standardize IdMap and IdMapEntry (chipsalliance#2483)
  • [AXI4IdIndexer] later fixed a bug with graphml parsing metadata bracketed in "< >" (chipsalliance#2638)
• [IdMapEntry][OMIdMapEntry] add maxTransactionsInFlight field chipsalliance#2627

Diplomacy

• versioning support for tilelink parameters (chipsalliance#2320)
• allow users to access Lazy Module nodes (chipsalliance#2301)
• JunctionNodes now support configurable up/down ratio (chipsalliance#2430)
• dynamic and remote order: fix QoR in designs with large physical address maps (chipsalliance#2461)
• [AddressSet] fix a bug where duplicated AddressSets would cause incorrect widening when unify is called. (chipsalliance#2502)
• [LazyModule]
  • mark LazyModules for inlining such as nodes with circuit identity (inputs are outputted unchanged) (chipsalliance#2579)
    • inline xbar patch: (chipsalliance#2639)
  • add scaladoc (chipsalliance#2311)
• Added more debug info to node requires (chipsalliance#2577)
• [Nodes] documentation for Nodes (chipsalliance#2604)
• [Nodes] replace bundleSafeNow guard with instantiated guard (chipsalliance#2680)
• tutorial for adder (chipsalliance#2615)
• [aop][Select] add Select Library API (chipsalliance#2674)
• [DTS] allow node names up to 48 bytes (chipsalliance#2570)
• [AddressAdjuster] and RegionReplicator now work on prefixes (not chip id) (chipsalliance#2430)
  • removes MultiChipMaskKey
• [AddressAdjuster] patches (chipsalliance#2470)
  • user can now supply a default local base address for reporting manager address metadata other than the 0th region
  • let local and remote legs have different user bits using <:= operator
  • allow for no fifo ordering on the replicated region
  • more verbose requires
• [BundleBridge] generalize BundleBroadcast into BundleBridgeNexus (chipsalliance#2497)
  • user can now supply input and output functions
• [BundleBridge] add SafeRegNext to BundleBridgeNexus to preserve width (chipsalliance#2520)
• [BundleBroadcast] add register pipelining argument (chipsalliance#2431)

Object Model

• [OMMemoryMap] require register map to only go to one memory region (chipsalliance#2496)
• [OMErrorDevice] added to Object Model (chipsalliance#2410, chipsalliance#2411)
• added IdRange, IDMap to include source ids in object model (chipsalliance#2495)
• added L2UTLB entries and memory (chipsalliance#2606)
• [OMISA] Add OMVectorExtension.vstartALU field (chipsalliance#2578)
• [RegFieldDesc]
  • add AddressBlocks for RegFieldDesc (chipsalliance#2437)
  • require RegFieldDesc to match RegEx to limit to a subspect of IP-XACT standard (chipsalliance#2525)
• updates for AHB and AXI (chipsalliance#2427)
• add Zfh extension (chipsalliance#2581)

Utilities, QoL, Other

• make RC more tolerant to x-prop (chipsalliance#2659)
• [util][rotate] fix rotate for zero-width wires (chipsalliance#2663)
• [SimJTAG][SimDTM] fix a verilator bug due to delay statements (chipsalliance#2635)
• register coverage now generated based on access type (chipsalliance#2384)
• [BundleMap] improved API for user bits
  • Customizable field unification, Default for bulk assignments, Field and Key class required (chipsalliance#2318)
  • Use BundleMap for AMBA protocols (chipsalliance#2326)
  • various bug fixes to TL user fields (chipsalliance#2335)
• [FixChisel3] Added some scaladoc commentary to the operators :<>, :<=, :=> to explain what they do and the rationale for their creation. (chipsalliance#2339)
• [util] Add utilities for bitwise shifts by signed shift amounts (chipsalliance#2477)
• [TLBusWrapper] more stability to internal wire names (chipsalliance#2515)
• [LazyRoCC] convert LazyRoCC to chisel3 (chipsalliance#2553)
• [OptimizationBarrier] give the module a name in generated verilog (chipsalliance#2507)
• add test enable pin to Clock Gate (chipsalliance#2087)
• [RecordMap] addd as an API for better diplomatic IO naming chipsalliance#2486
  • used to get easier to follow Clock Group signal names chipsalliance#2528
• [IDPool] enable ResetAsynchronous Full (chipsalliance#2568)
• [IDPool] add lateValid and revocableSelect to shift the deep logic cones from before the valid/selec registers to after the bitmap register (chipsalliance#2673, chipsalliance#2677)
• [IDPool] infer widths (chipsalliance#2679)
• Make AsyncValidSync a RawModule (chipsalliance#2352)
• compiler warning fixes (chipsalliance#2357, chipsalliance#2356, chipsalliance#2355, chipsalliance#2354, chipsalliance#2353, chipsalliance#2378, chipsalliance#2379, chipsalliance#2380, chipsalliance#2442, chipsalliance#2567, chipsalliance#2757, chipsalliance#2758)
• [SCIE] fix width mismatch assignment lint warning from VCS (chipsalliance#2563)
• Initial scalatest flow support and aspect generation (chipsalliance#2309, chipsalliance#2517)
• [linting] add Chisel Linting Framework (chipsalliance#2435)
• [scalafix] enable scalafix and remove unused imports (chipsalliance#2648)
  • This requires downstream projects using rocket-chip's build.sbt to enable scalafix.
  • enable LeakingImplicitClassVal (chipsalliance#2650)
  • enable ProcedureSyntax (chipsalliance#2651)
• mdoc infrastructure (chipsalliance#2615)
• [PlusArg]
  • support for no-default PlusArgs and string-valued PlusArgs (chipsalliance#2453)
  • fix VCS lint warning for plusarg default bit width (chipsalliance#2558, chipsalliance#2562)
• decode: improve runtime (chipsalliance#2462)
• Switch to using Github Actions (chipsalliance#2465, chipsalliance#2472, chipsalliance#2530, chipsalliance#2536)
• Some Travis changes were made, but travis is dropped in later releases (chipsalliance#2451, chipsalliance#2454, chipsalliance#2455, chipsalliance#2490)
• Add scalatest to a bucket for regression testing (chipsalliance#2511)
• RTLSim trace log:
  • fixed an issue where the wrong destination register being dumped in the RTLSim trace log (chipsalliance#2409)
  • enhanced log so only registers read or written are printed (chipsalliance#2414)
• add CONTRIBUTING.md (chipsalliance#2342, chipsalliance#2473)
• [wake]
  • add self-location rules (chipsalliance#2526)
  • fix string interpolation of bootrom path (chipsalliance#2535)
  • publish location of ivydependencies.json (chipsalliance#2540)
  • update CI to 0.19.0 (chipsalliance#2594 superseding chipsalliance#2584)
  • avoid hardcoded directory path for hardfloat repo chipsalliance#2633
• [mill] add mill build system (chipsalliance#2654)
• [sbt] remove jgit-repo resolver (chipsalliance#2364)

Version 1.3.0

This version exists as a branch, but seems to be largely synonymous with 1.2. There are no release notes or maintenance for this version.

Version 1.2.0

There are no existing release notes for this and previous versions.