2100 Commits

Author	SHA1	Message	Date
Megan Wachs	44edc5fdc3	test_mode_reset: Use simpler apply() method	2017-09-14 13:16:13 -07:00
Megan Wachs	82c00cb656	reset_catch: Allow Test Mode Overrides	2017-09-14 13:16:13 -07:00
Henry Cook	e50d14415e	tilelink: more verbose requires	2017-09-13 11:25:42 -07:00
Henry Cook	56dae946b6	coreplex: MemoryBusParams.beatBytes also based on XLen	2017-09-13 11:25:42 -07:00
Henry Cook	b86f4b9bb7	config: use Field defaults over Config defaults ... Also rename some keys that had the same class name as their value's class name.	2017-09-13 11:25:42 -07:00
Henry Cook	a7540d35b7	ports: use BigInts instead of Longs and the new x"..." context	2017-09-13 11:25:42 -07:00
Henry Cook	37c5af1c0d	diplomacy: add x"..." string context ... Enables hex address literals containing underscores. Converts them to BigInts.	2017-09-13 11:25:42 -07:00
Henry Cook	063ca0ed4a	Merge pull request #983 from freechipsproject/kill-paddrbits ... Remove global fields PAddrBits and ResetVectorBits	2017-09-11 12:51:10 -07:00
Andrew Waterman	1f606d924f	Don't perform in-place correction if there was a recent store (#988) ... Since the correction updates the entire word, the WAW hazard detection logic is not sufficient to prevent overwriting a recent store. So, re-read the word after all pending stores have drained.	2017-09-08 16:26:54 -07:00
Henry Cook	9c0bfbd500	tile: remove global Field ResetVectorBits ... Reset vector width is determined by systemBus.busView. Also move some defs from HasCoreParameters to HasTileParameters.	2017-09-08 14:50:59 -07:00
Henry Cook	3133c321b7	scratchpad: remove dependency on HasCoreParameters	2017-09-08 13:55:40 -07:00
Henry Cook	e46aeb7342	tile: remove PAddrBits in favor of SharedMemoryTLEdge	2017-09-08 13:53:36 -07:00
Wesley W. Terpstra	e7de7f3e82	Merge pull request #985 from freechipsproject/flop-interrupts ... Add Parameters to diplomatic edges	2017-09-08 13:16:11 -07:00
Andrew Waterman	53dfc5e9be	Remove overzealous assertion (#987) ... This assertion made sure the D$ controller was able to write the tag RAM when a cache line was refilled. However, it is benign if it fails to do so: the metadata is invalid at this point, so the miss will simply happen a second time. This happens when resolving a tag ECC error during hit-under-miss.	2017-09-07 18:17:56 -07:00
Wesley W. Terpstra	e723a3f42b	MemoryBus: fanout the A for performance	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	6879f5bfb1	tilelink: Xbar now allows for fanout control	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	e831acba9c	adapters: support bulk connections	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	06a244f9f9	diplomacy: rename {Left,Right}Star to refer to {Source,Sink}Cardinality	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	bef593c21a	diplomacy: edges now capture their Parameters	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	80ed27683e	diplomacy: protect against API leakage	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	1365c5f90c	diplomacy: implement DisableMonitors scope	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	a450357744	tilelink: Monitor construction method is unconditional ... Whether or not a Monitor should be placed is decided by diplomacy.	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	7a8364ef08	diplomacy: leverage new Parameters defaults	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	655a08f12e	config: support default values for Field[T] keys	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	09d8d476c5	config: require Parameters keys to be Field[T] ... This has been good practice for ages. Enforce it.	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	42f1ae27fc	Xbar: use the IdentityModule to encourage wider fanout	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	5626cdd18f	util: add the IdentityModule, useful to dedup wires	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	1a87ed1193	coreplex: add externalSlaveBuffers configuration option	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	fd8a51a910	coreplex: rename externalBuffers to externalMasterBuffers	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	4911a7d44f	tilelink Bus: toAsyncSlaves now supports BufferChains	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	040f7e1d49	tilelink: add Bus.toSyncSlaves for easy BufferChain attachment	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	d5c6494f59	tilelink: Bus.toRationalSlaves can have a BufferChain	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	80965e8230	tilelink Buffer: use new :=? adapter API	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	1b705f62f6	diplomacy: support :=? for unknown star inference	2017-09-07 16:03:35 -07:00
Wesley W. Terpstra	6bfea86dbf	config: support p.lift(key) to optionally return a value	2017-09-07 16:03:34 -07:00
Wesley W. Terpstra	2d93262f71	RationalCrossing: use ShiftQueues ... These are faster and small don't cost much more.	2017-09-07 16:03:34 -07:00
Wesley W. Terpstra	50d5d8c1fd	ShiftQueue: added a helper object	2017-09-07 16:03:34 -07:00
Wesley W. Terpstra	3e3024c256	ShiftQueue: fix bug in !flow case	2017-09-07 16:03:34 -07:00
Wesley W. Terpstra	ed70b243bd	plic: support a configurable number of interrupt register stages	2017-09-07 16:03:34 -07:00
Wesley W. Terpstra	9b55063de6	clint: support a configurable number of interrupt register stages	2017-09-07 16:03:34 -07:00
Megan Wachs	126d56b254	synchronizers: I learn how foldRight works	2017-09-07 10:48:27 -07:00
Megan Wachs	1da6cb85ab	shiftReg: Make it so that register '0' is always closest to the q output, regardless of the type of shift register created.	2017-09-07 09:57:50 -07:00
Megan Wachs	dcafb5fea3	Merge remote-tracking branch 'origin/master' into async_reg	2017-09-06 11:07:19 -07:00
Megan Wachs	3c4b472f66	shift regs: remove some unnecessary primitives, and add some that actually are necessary	2017-09-06 10:37:59 -07:00
Jim Lawson	f1b7666d21	Jtagresettobool - add explicit toBool cast now required on reset. (#984) ... Add explicit toBool cast on reset, for chisel3 compatability	2017-09-06 09:49:47 -07:00
Megan Wachs	777f052f95	regs: Add named/initial value ShiftRegister primitives so they are all in one place	2017-09-05 17:32:53 -07:00
Wesley W. Terpstra	b1cacc56ad	SystemBus: restore correct order of FIFOFixer and Buffer	2017-09-05 16:41:39 -07:00
Wesley W. Terpstra	b74a419bfb	FrontBus: FIFOFixer should not have a buffer between it and Xbar	2017-09-05 16:27:57 -07:00
Megan Wachs	e9e46db600	sync reg: Rename the file to reflect the more generic shift registers also in the file.	2017-09-05 15:54:25 -07:00
Megan Wachs	5df23c5514	Synchronizers: remove some newlines and unncessary gen's	2017-09-05 15:17:21 -07:00
Wesley W. Terpstra	e65f49b89a	FrontBus: attach to splitter for cross-chip visibility	2017-09-05 15:03:41 -07:00
Wesley W. Terpstra	5886025b1a	sbus => pbus: 2 buffers should already be enough ... There is a buffer on the sbus backside. There is a buffer on the pbus frontside. Between them is only an AtomicAutomata. That should be enough for most designs.	2017-09-05 15:03:38 -07:00
Henry Cook	a902e15987	pbus: clarify that we are adding buffers when attaching to sbus	2017-09-05 15:03:38 -07:00
Henry Cook	8fc4d78c84	frontbus: provide fifofixer on the side of the front bus where masters connect	2017-09-05 15:03:38 -07:00
Megan Wachs	667d966410	TLBuffer: Create a wrapper module for TLBufferChain, to allow for more stable naming	2017-09-05 15:03:38 -07:00
Megan Wachs	94f06dc85c	pbus: turn down overkill buffering between PBus and SBus	2017-09-05 15:03:38 -07:00
Megan Wachs	c353f68dc0	buses: name dummy buffers too	2017-09-05 15:03:38 -07:00
Henry Cook	3bde9506c6	coreplex: allow buffer chains on certain bus ports	2017-09-05 15:03:36 -07:00
Megan Wachs	57d0360c35	frontbus: Name the connection.	2017-08-30 18:07:34 -07:00
Megan Wachs	c99afe4c66	buses: Name all the things.	2017-08-30 17:31:42 -07:00
Henry Cook	32cb358c81	coreplex: include optional tile name for downstream name stabilization	2017-08-30 15:48:55 -07:00
Megan Wachs	183fefb2b9	Front/SystemBus: allow naming the intermediate TLNodes that get sprinkled in	2017-08-30 15:27:56 -07:00
Wesley W. Terpstra	d5b62dffda	SystemBus: add stupidly many (4 more) buffers from sbus=>pbus ... This should probably be reverted.	2017-08-30 14:22:49 -07:00
Henry Styles	f7330028cc	Add optional frontbus for peripherals mastering into SBus. Switch FF and Buffer order on non-tile masters into SBus. Buffer non-L2 side of splitter	2017-08-30 14:22:49 -07:00
Wesley W. Terpstra	173f185b17	Merge pull request #976 from freechipsproject/system-buffer ... SystemBus: add output buffering	2017-08-30 23:22:13 +02:00
Wesley W. Terpstra	656609d610	SystemBus: split FIFOFixers along bus boundaries ... If you have a system with a lot of periphery slaves, you wan to FIFO fix them on the periphery bus rather than paying the circuit cost at the sbus.	2017-08-30 13:28:11 -07:00
Megan Wachs	a3bc5f2e33	synchronizers: Add a generic shift register and then extend from it, since an asynchronously resettable shift register is also a useful primitive	2017-08-30 12:59:16 -07:00
Megan Wachs	8139014c9e	syncrhonizers: Remove unused sync from superclass	2017-08-30 12:33:03 -07:00
Megan Wachs	9dd6c4c32d	synchronizers: New chisel ways of cloning type and use simpler lambda function	2017-08-30 12:11:14 -07:00
Megan Wachs	bd32f0c122	synchronizers: properly pass parameters up to the superclass	2017-08-30 11:58:25 -07:00
Megan Wachs	483e63da19	synchronizers: Correctly pass the width through	2017-08-30 11:50:25 -07:00
Megan Wachs	a62ce0afe6	TLBuffer: Add a nodedebugstring for quick browsing of the properties of the buffer.	2017-08-29 10:36:46 -07:00
Megan Wachs	c473538e36	Merge remote-tracking branch 'origin/master' into async_reg	2017-08-28 17:19:03 -07:00
Megan Wachs	451334ac73	Add 1-deep synchronizer register for output of AsyncQueue	2017-08-28 17:18:54 -07:00
Wesley W. Terpstra	bf19440db5	SystemBus: use a full buffer on slaves	2017-08-26 02:47:04 -07:00
Megan Wachs	85c39b2f97	syncregs: Not sure the use case for SynchronizerShiftRegInit, so remove it YAGNI	2017-08-24 17:47:04 -07:00
Megan Wachs	4e773f4738	syncregs: Use synchronizer primivites for LevelSyncCrossing	2017-08-24 17:42:31 -07:00
Megan Wachs	130b24355f	syncregs: Use synchronizer primitives for IntXing	2017-08-24 17:39:07 -07:00
Megan Wachs	8b462d1595	syncregs: Use common primitives for AsyncQueue grey code synchronizers	2017-08-24 17:34:07 -07:00
Megan Wachs	3461cb47cc	syncregs: Make Reset catcher use the synchronizer primitive	2017-08-24 17:26:38 -07:00
Megan Wachs	c78ee9f0e4	syncreg: Refactor common code	2017-08-24 17:18:04 -07:00
Megan Wachs	d83a6dc6af	syncregs: Add utilities for Synchronizing Shift Registers	2017-08-24 16:55:17 -07:00
Megan Wachs	7f683eeb24	async_regs: Make modules have predictable names	2017-08-24 15:33:53 -07:00
Megan Wachs	0f75ebee92	async_reg: Rename the file to match scalastyle	2017-08-24 15:31:29 -07:00
Megan Wachs	103b6bc6d3	systemBus: allowing naming the TLBuffers which get inserted	2017-08-24 14:49:12 -07:00
Wesley W. Terpstra	17134125e1	SystemBus: remove misnamed functions (#972) ... These functions were actually for cross connecting chips.	2017-08-24 23:35:01 +02:00
Andrew Waterman	82df766f4a	Merge pull request #963 from freechipsproject/interrupt-order ... Respect ISA requirements on interrupt priority order	2017-08-18 00:10:19 -07:00
Andrew Waterman	8087a205cc	Remove redundant check in interrupt priority encoding ... chooseInterrupts already sorts M interrupts above S interrupts.	2017-08-17 22:23:42 -07:00
Andrew Waterman	cbe7c51b50	Respect ISA requirements on interrupt priority order ... a62e76cb16	2017-08-17 21:27:08 -07:00
Shreesha Srinath	b1719cfee0	Fixing requirements for PAddrBits (#961) ... Previously, the requirement for PAddrBits only checked to be equal or greater than the bundle bits. Changing it to check for these to match exactly as for cases when the PAddrBits greater than address bits we could run into scenarios which cause possible address wrap around issues.	2017-08-17 11:53:59 -07:00
Megan Wachs	1db4b3be9a	Merge pull request #957 from freechipsproject/param_jtag_vpi ... jtag_vpi: Use Parameterized Black Box	2017-08-14 18:37:30 -07:00
Megan Wachs	8783d51c97	jtag_vpi: Use Parameterized Black Box to allow TestHarnesses to override the clock speed	2017-08-14 17:25:47 -07:00
Wesley W. Terpstra	710a782145	HeterogenousBag: empty bags were being combined! (#956) ... This lead to strange firrtl errors when you had two empty HeterogeneousBags in the same Bundle.	2017-08-14 15:48:42 -07:00
Andrew Waterman	e945f6e265	Merge pull request #955 from freechipsproject/fix-acquire-before-release ... Fix acquire before release	2017-08-13 18:29:58 -07:00
Megan Wachs	88332bd885	max-core-cycles: Add a +max-core-cycles PlusArg	2017-08-13 15:47:14 -07:00
Andrew Waterman	3cbc5262ec	Don't permit new acquires until the release queue is drained ... If the queue is not empty before a dirty miss, C could block D. I haven't seen this in the wild, but it could happen because of dirty probe responses backed up in the queue.	2017-08-13 13:18:45 -07:00
Andrew Waterman	0190724492	Actually use the C-channel acquire-before-release queue ... oops...	2017-08-13 13:03:35 -07:00
Andrew Waterman	7387f2a93a	Don't block D-channel when handling a probe ... This is an acquire-before-release regression.	2017-08-12 16:13:24 -07:00
Andrew Waterman	604abd5b07	Only report ECC errors when the RAM was actually read	2017-08-12 15:28:03 -07:00
Andrew Waterman	18fb052fc9	DRY	2017-08-12 15:27:30 -07:00
Andrew Waterman	176110b6d3	Don't trigger ECC writebacks when a release is in flight	2017-08-12 15:23:57 -07:00
Wesley W. Terpstra	f191bb994c	PatternPusher: can now expect a certain output (#952)	2017-08-11 18:10:27 -07:00
Wesley W. Terpstra	baf769f924	tilelink: add PatternPusher, a device to inject a fixed traffic pattern (#950)	2017-08-11 15:07:10 -07:00
Andrew Waterman	a3358f34a0	Fix priority inversion for two back-to-back divides (#948) ... If the first one is killed for some unrelated reason (e.g. write port hazard), the second one will still issue to the div-sqrt unit. While it will itself later be killed, the fact that the later instruction acquires a resource needed by the former instruction leads to deadlock.	2017-08-10 17:12:09 -07:00
Andrew Waterman	0a591c5b5b	Roll back use of UIntToOH1 (#946) ... These appear to be equivalent, but the old one seems to fail in Vivado and this one seems to pass. This is not yet conclusive.	2017-08-09 18:39:47 -07:00
Andrew Waterman	721770244e	Fix IBuf bug ... Don't examine a packet's xcpt signal if it might be invalid. In this case, the correct fix is to not examine xcpt at all; the deleted code was vestigial. (Note, the other use of xcpt(j+1) in this code is indeed safe.)	2017-08-09 09:47:51 -07:00
Wesley W. Terpstra	a9b1410f01	BusBlocker: parameterize page granularity	2017-08-08 17:10:01 -07:00
Wesley W. Terpstra	010ba94474	BusBlocker: rename a variable	2017-08-08 17:00:22 -07:00
Wesley W. Terpstra	6d6fc38787	BusBlocker: lock bit should affect the prior PMP address, not next	2017-08-08 17:00:12 -07:00
Andrew Waterman	809c7e8551	Don't merge stores that manifest WAW hazards ... The following sequence would drop the first store when eccBytes=4: sb x0, 0(t0) nop sb x0, 4(t0) nop sb x0, 1(t0) Because the first and second store are to different ECC granules, the hazard check correctly allowed the second one to proceed, but the third was merged with the second, even though it conflicted with the first. So, don't allow the third to be merged with the second, since the second stored to a different ECC granule.	2017-08-08 15:19:05 -07:00
Wesley W. Terpstra	3ef6e4c9f2	Merge pull request #939 from freechipsproject/bus-blocker ... tilelink: PMP controlled BusBlocker prevents bus accesses	2017-08-08 15:06:55 -07:00
Andrew Waterman	82e13443b2	Merge pull request #937 from freechipsproject/critical-paths ... Perform tag error detectoin/correction in same cycle as RAM	2017-08-08 15:03:28 -07:00
Wesley W. Terpstra	8f261adc6b	BusBlocker: change default policy to deny	2017-08-08 14:19:59 -07:00
Wesley W. Terpstra	0d76e96b88	tilelink: PMP controlled BusBlocker prevents bus accesses	2017-08-08 13:28:01 -07:00
Andrew Waterman	7935c61c19	Don't report to the DTIM that data is cacheable ... Otherwise, it will attempt to perform AMOs where they're unsupported!	2017-08-08 11:55:04 -07:00
Andrew Waterman	74d309c18e	Make I vs. D a static property of TLB, not an input pin ... The microarchitecture doesn't really support unified TLBs, so don't fake it.	2017-08-08 11:54:47 -07:00
Andrew Waterman	e92981b0bd	DRY	2017-08-08 11:46:38 -07:00
Andrew Waterman	62ccba304c	Perform tag error detectoin/correction in same cycle as RAM ... The tag RAMs tend to be fast, so take up some of the slack. This makes s2_nack faster.	2017-08-08 10:21:30 -07:00
Palmer Dabbelt	6d1d285464	Merge pull request #933 from freechipsproject/cinst ... Print out the compressed instruction when executing one	2017-08-07 21:40:10 -07:00
Palmer Dabbelt	cc1e2af336	Merge pull request #934 from freechipsproject/critical-paths ... Revert "Remove one gate from D$ ECC check"	2017-08-07 19:41:08 -07:00
Henry Cook	c8f8806df0	Merge pull request #932 from freechipsproject/tl-bus-delayer ... tilelink: allow insertion of TLDelayer on TLBus outward node	2017-08-07 19:01:39 -07:00
Henry Cook	c4092dd0cc	tilelink: improve entropy of bus delayer	2017-08-07 17:36:07 -07:00
Andrew Waterman	402907990c	Revert "Remove one gate from D$ ECC check" ... This reverts commit 7d94074b05, which works fine with optimistic behavioral RAMs but not real ones.	2017-08-07 17:33:20 -07:00
Henry Cook	2910d6fa2a	tilelink: make bus xbar protected so it can be suggestNamed	2017-08-07 17:30:24 -07:00
Palmer Dabbelt	fc0d5fcf98	Print out the compressed instruction when executing one	2017-08-07 17:21:53 -07:00
Wesley W. Terpstra	e27072e063	Merge pull request #931 from freechipsproject/fix-ram-model-source-reuse ... Fix ram model source reuse	2017-08-07 16:56:13 -07:00
Henry Cook	c457c9cb9f	tilelink: allow insertion of TLDelayer on TLBus outward node	2017-08-07 16:43:06 -07:00
Wesley W. Terpstra	f8b45564d1	tilelink: RAMModel must support source reuse ... If a multibeat response comes back, the source might be reused. If response reordering has made the multibeat response invalid, we need to remember this even if the valid bit is cleared on reuse.	2017-08-07 16:01:15 -07:00
Yunsup Lee	558fc7f293	maskrom: retain data for d channel is not ready	2017-08-07 12:17:10 -07:00
Andrew Waterman	7fd8bb1159	Merge pull request #928 from freechipsproject/critical-paths ... Critical paths	2017-08-06 18:50:59 -07:00
Andrew Waterman	658e36f98b	Reduce fanout on frontend io.cpu.req.valid signal	2017-08-06 17:38:51 -07:00
Andrew Waterman	7d94074b05	Remove one gate from D$ ECC check ... The D$ corrects via writeback, so which word the error was in doesn't matter, as the entire line is corrected.	2017-08-06 17:36:53 -07:00
Wesley W. Terpstra	d03fdc4f30	diplomacy: seal the LazyModuleImpLike trait (#927) ... This makes sure that all the base classes call instantiate()	2017-08-06 17:32:23 -07:00
Yunsup Lee	aa60c6944b	diplomacy: provide default clock/reset for LazyRawModuleImp	2017-08-06 13:40:07 -07:00
Andrew Waterman	83875e3a0c	Only flush D$ on FENCE.I if it won't always be probed on I$ miss	2017-08-05 14:22:40 -07:00
Andrew Waterman	991e16de92	Remove probe address mux from TLB response path	2017-08-05 12:57:38 -07:00
Andrew Waterman	b9b4142bb4	Get s2_nack off the critical path ... We were using it to compute the next PC on flush vs. replay (which require PC+4 and PC, respectively). This fix gets rid of the adder altogether by reusing the M-stage PC in the flush case, which by construction holds PC+4.	2017-08-05 00:30:36 -07:00
Andrew Waterman	bc298bf146	Optimize ShiftQueue for late-arriving deq.ready	2017-08-04 22:06:37 -07:00
Andrew Waterman	6112adfbb0	Get L2 TLB tag/parity check off the D$ arbitration path	2017-08-04 17:01:51 -07:00
Andrew Waterman	8d97684555	Fix L2 TLB perfctr ... It was counting conflict misses but not cold misses.	2017-08-04 17:01:31 -07:00
Andrew Waterman	df7f09b9ce	Get I$ ECC check further off critical path	2017-08-04 16:59:21 -07:00
Andrew Waterman	4bfbe75d74	Avoid pipeline replays when fetch queue is full	2017-08-04 16:59:21 -07:00
Andrew Waterman	a45997d03f	Separate I$ parity error from miss signal ... Handle parity errors with a pipeline flush rather than a faster frontend replay, reducing a critical path.	2017-08-04 16:59:21 -07:00
Andrew Waterman	06a831310b	Shave a gate delay off I$ backpressure path ... The deleted code was a holdover from Hwacha's vector fences.	2017-08-04 13:12:43 -07:00
Andrew Waterman	ecc2ee366c	Shave a few gate delays off IBuf control logic ... It takes a while for the pipeline to compute the stall signal, so avoid using it until the last logic levels in the clock cycle.	2017-08-04 13:12:43 -07:00
Andrew Waterman	7937db0c84	Merge pull request #919 from freechipsproject/imiss-perf-counter ... Fix I$ miss perfctr	2017-08-04 01:04:23 -07:00
Megan Wachs	017ac130c1	Merge pull request #922 from freechipsproject/bigger_tl_xbar ... TLXbar: Allow more masters and slaves and issue a warning.	2017-08-03 16:52:56 -07:00
Megan Wachs	50c85f1b62	TLXbar: Allow more masters and slaves and issue a warning.	2017-08-03 15:46:06 -07:00
Andrew Waterman	ba4eecc0f0	Use UIntToOH1 (#921) ... Closes #920	2017-08-03 14:55:39 -07:00
Andrew Waterman	f483bab4aa	Fix I$ miss perfctr ... The old version was counting prefetches, too.	2017-08-03 00:52:12 -07:00
Andrew Waterman	1be1433f04	Merge pull request #918 from freechipsproject/icache-prefetch ... Icache prefetch	2017-08-02 21:22:20 -07:00
Andrew Waterman	d66e8f8e80	Merge pull request #914 from freechipsproject/critical-paths ... Fix some critical paths	2017-08-02 19:05:31 -07:00
Megan Wachs	3fc7100048	Merge pull request #917 from freechipsproject/fuzzer_order ... TLFuzzer: Allow Ordered clients to be created as well by the fuzzer	2017-08-02 18:39:59 -07:00
Andrew Waterman	2537d0d54e	Optionally prefetch next I$ line into L2$ on miss	2017-08-02 17:10:56 -07:00
Andrew Waterman	744cdb2f72	Make TLB report when it's safe to prefetch within a page	2017-08-02 17:09:38 -07:00
Megan Wachs	595415d207	TLFuzzer: Correct the number of ordered clients created	2017-08-02 15:48:21 -07:00
Megan Wachs	fc5c04ed4b	TLFuzzer: Allow Ordered clients to be created as well by the fuzzer	2017-08-02 14:44:18 -07:00
Andrew Waterman	7d2dd3769f	Optimize a hazard check critical path	2017-08-02 14:27:25 -07:00
Megan Wachs	85bdae0fa8	diplomacy: Pretty Print for TransferSizes	2017-08-02 11:40:50 -07:00
Andrew Waterman	2eb239d03f	Add option to retime D$ way mux into subsequent pipeline stage	2017-08-01 23:59:20 -07:00
Andrew Waterman	9464c6db40	Mitigate(?) frontend critical path	2017-08-01 18:51:17 -07:00
Andrew Waterman	735701382f	Mitigate some I$ response valid critical paths	2017-08-01 18:51:17 -07:00
Andrew Waterman	2ecea2ef60	Don't use a pipe queue on D$ TL A-channel ... This cuts an I$->D$ path.	2017-08-01 15:17:07 -07:00
Yunsup Lee	6ef8ee5d4d	tilelink: add mask rom	2017-07-31 21:34:04 -07:00
Yunsup Lee	4b33249812	Merge pull request #911 from freechipsproject/fix-dcache-bug ... Fix D$ ready-valid signaling bug	2017-07-31 19:14:16 -07:00
Wesley W. Terpstra	42ff74bd34	Merge pull request #910 from freechipsproject/tilelink-map ... Tilelink map	2017-07-31 18:33:09 -07:00
Andrew Waterman	e140893a01	Use 1-entry queue on processor-side E-channel ... The cache can't sink a grant every cycle, so extra E buffering doesn't help.	2017-07-31 18:06:54 -07:00
Andrew Waterman	5681693ccc	Fix a D$ ready-valid signaling regression ... I broke this in 66d06460fa.	2017-07-31 18:05:14 -07:00
Wesley W. Terpstra	d7fd9d2b82	tilelink: Filter, add another case	2017-07-31 16:51:26 -07:00
Yunsup Lee	71a250b071	Merge pull request #909 from freechipsproject/tile-buffer ... add optional tile boundary buffers	2017-07-31 16:46:22 -07:00
Wesley W. Terpstra	b126105230	tilelink: add TLMap to make it possible to move slaves	2017-07-31 16:39:00 -07:00
Wesley W. Terpstra	13d3ffbcaa	tilelink: Filter now support arbitrary filter functions	2017-07-31 16:38:38 -07:00
Yunsup Lee	7adfd5c431	Merge pull request #906 from freechipsproject/critical-paths ... Mitigate I$->D$->I$ critical path	2017-07-31 16:14:11 -07:00
Yunsup Lee	f473e6bad0	tile: add optional boundary buffers	2017-07-31 15:57:22 -07:00
Yunsup Lee	cb3529bbc3	util: tweak rational crossings to avoid mux in source	2017-07-31 15:10:15 -07:00
Henry Cook	11332c1226	dcache: break potential combinatorial loop by making pstore_drain_on_miss more conservative	2017-07-31 14:03:30 -07:00
Andrew Waterman	d811692c3b	Mitigate I$->D$->I$ critical path ... This seemingly irrelevant change shaves several gate delays off the I$ tl.a.valid path.	2017-07-31 01:43:04 -07:00
Andrew Waterman	ac4339a8e7	Pass D$ backpressure to D-channel, rather than asserting	2017-07-29 11:48:36 -07:00
Andrew Waterman	edcd2c696c	Avoid needless stall on E-channel back pressure	2017-07-29 11:47:58 -07:00
Wesley W. Terpstra	8e2e931770	Merge pull request #903 from freechipsproject/monitor-probes ... tilelink: use the Monitor to enforce Probe sourcing	2017-07-29 01:12:08 -07:00
Wesley W. Terpstra	56e28026a6	TLError: does not need to be fast; cut the loop ... The SystemBus already has a flow buffer on outputs.	2017-07-29 00:22:21 -07:00
Wesley W. Terpstra	540256e24a	systembus: all slaves should have an output buffer	2017-07-29 00:13:33 -07:00
Wesley W. Terpstra	eadf4e9fcc	Revert "tile: add option for tile boundary buffers" ... This reverts commit b64b87ad07. The crossings already have buffering in those places where it was appropriate. Adding more does not help flow through paths.	2017-07-29 00:03:24 -07:00
Wesley W. Terpstra	68064ba260	systembus: don't double down on buffers ... The order should be: master => buffer|xing => fifofixer => splitter => xbar	2017-07-29 00:02:12 -07:00
Yunsup Lee	140086e2c5	Merge pull request #902 from freechipsproject/perf-improvements ... Perf improvements	2017-07-28 20:12:10 -07:00
Wesley W. Terpstra	a0db929003	tilelink: use the Monitor to enforce Probe sourcing	2017-07-28 18:08:00 -07:00
Megan Wachs	573890e102	Merge pull request #900 from freechipsproject/more_verbose_requires ... diplomacy: More verbose require	2017-07-28 13:23:33 -07:00
Andrew Waterman	fdb8935712	Improve fidelity of two perf counters	2017-07-28 13:14:04 -07:00
Andrew Waterman	4c82f6b77e	Don't refill BTB on not-taken branches	2017-07-28 13:13:52 -07:00
Andrew Waterman	2e8b02e780	Merge D$ store hits when ECC is enabled ... This avoids pipeline flushes due to subword WAW hazards, as with consecutive byte stores.	2017-07-28 12:56:36 -07:00
Andrew Waterman	838864870e	Bypass TLB refill signal to halve L2 TLB hit time ... The 4-cycle hit time is 1 cycle too long to avoid a second pipeline replay, so it was effectively 9 cycles instead of 4.	2017-07-28 12:56:36 -07:00
Andrew Waterman	ae1f7a95f6	Don't nack misses when there's a pending store ... That effectively increased the miss latency by 5 cycles when there was a store hit followed by a load miss. Since pending stores are drained when releaseInFlight, the check I removed was redundant.	2017-07-28 12:56:36 -07:00
Henry Cook	7eeb9dfd88	Merge pull request #899 from freechipsproject/wrapper-dedup ... Stabilize tile wrappers for downstream tools	2017-07-28 10:52:59 -07:00
Megan Wachs	f61fe2be1e	diplomacy: More verbose require	2017-07-28 10:05:45 -07:00
Wesley W. Terpstra	5f81c2243f	tilelink: add BusBypass, useful to turn devices off	2017-07-27 20:16:30 -07:00
Wesley W. Terpstra	9a36755b6a	tilelink: CacheCork uses constructor helpers	2017-07-27 18:38:15 -07:00
Wesley W. Terpstra	45189c3e30	tilelink: CacheCork now supports errors and BtoT upgrade ... - Acquire.BtoT succeeds with toT instantly - AccessAckData.error causes Grant.toN.error	2017-07-27 18:38:13 -07:00
Wesley W. Terpstra	2e4f1611ed	tilelink: Error device supports Acquire ... We need this if we want to divert traffic to it from a TL-C slave.	2017-07-27 18:32:58 -07:00
Henry Cook	b64b87ad07	tile: add option for tile boundary buffers	2017-07-27 17:30:51 -07:00
Henry Cook	289ef30dbc	coreplex: change AsynchronousCrossing.sync default to 3	2017-07-27 15:44:51 -07:00
Henry Cook	266ed56e8d	tile: turn off more slave port monitors	2017-07-27 15:28:53 -07:00
Henry Cook	9a483af6e8	coreplex: naming of tile wrappers	2017-07-27 15:16:48 -07:00
Henry Cook	33852ef965	coreplex: remove superfluous sink and source from wrapper	2017-07-27 14:23:03 -07:00
Wesley W. Terpstra	651da73d89	tilelink: it is now legal to support Acquire for UNCACHED regions ... These cases exist: GET_EFFECTS, PUT_EFFECTS, UNCACHEABLE && !supportsAcquire: MMIO UNCACHED && !supportsAcquire: speculation ok and may be cached UNCACHED && supportsAcquire: LLC/CacheCork applied (slave never probes) CACHED, TRACKED && supportsAcquire: slave might probe	2017-07-27 11:11:22 -07:00
Wesley W. Terpstra	0ab5cb67b3	tilelink: fix RAMModel handling of AMOs on early source reuse (#897)	2017-07-27 11:07:13 -07:00
Wesley W. Terpstra	9804bdc34e	tilelink: remove obsolete addr_lo signal (#895) ... When we first implemented TL, we thought this was helpful, because it made WidthWidgets stateless in all cases. However, it put too much burden on all other masters and slaves, none of which benefitted from this signal. Furthermore, even with addr_lo, WidthWidgets were information lossy because when they widen, they have no information about what to fill in the new high bits of addr_lo.	2017-07-26 16:01:21 -07:00
Wesley W. Terpstra	d096d5d1c4	tilelink: fix AtomicAutomata bug wrt early source reuse ... The new fuzzer already found it's first victim.	2017-07-26 12:52:29 -07:00
Wesley W. Terpstra	6550ae2e31	tilelink: increase Fuzzer source reuse aggression	2017-07-26 12:37:31 -07:00
Wesley W. Terpstra	1efdca106c	tilelink: RAMModel support early reuse of source	2017-07-26 12:37:31 -07:00
Wesley W. Terpstra	138276fd87	tilelink: SourceShrinker should work also for 0 latency	2017-07-26 12:37:31 -07:00
Wesley W. Terpstra	b2edca2a6b	tilelink: cut WidthWidget from dependency on addr_lo	2017-07-26 10:31:09 -07:00
Wesley W. Terpstra	ede87c1f73	tilelink: rewrite WidthWidget beat splitter ... - split the data based on the address, not the mask (the first version of TileLink did not have low address bits) - the dependency on addr_lo is now exposed and easy to replace	2017-07-26 10:24:16 -07:00
Wesley W. Terpstra	0f5065fbf3	tilelink: WidthWidget rewrite beat merging ... - errors are properly OR reduced - registers latched only as needed (was previously a shift register) - combines beats without inspecting address (removes addr_lo dependency)	2017-07-26 10:24:12 -07:00
Wesley W. Terpstra	f0ffb7e31e	tilelink: initialize toggle in Fragmenter (#894) ... No strictly necessary, because the initial value does not matter, but good hygiene since it drives a cycle of logic.	2017-07-26 10:21:31 -07:00
Andrew Waterman	5a5b78b15e	Improve L2 TLB coding style	2017-07-26 02:22:43 -07:00
Andrew Waterman	5a9c673f41	Fix L2 TLB response bug ... Sometimes, it would inform the L1 TLB that the translation was for a superpage, even though that's never the case.	2017-07-26 02:20:41 -07:00
Andrew Waterman	acca0fccf5	Fix BTB not being refilled on some indirect jumps ... We are overloading the BTB-hit signal to mean that any part of the frontend changed the control-flow, not just the BTB. That's the right thing to do for most of the control logic, but it means the BTB sometimes won't get refilled when we'd like it to. This commit makes the frontend use an invalid BTB entry number when it, rather than the BTB, changes the control flow. Since the entry number is invalid, the BTB will treat it as a miss and refill itself. This is kind of a hack, but a more palatable fix requires reworking the RVC IBuf, which I don't have time for right now.	2017-07-26 02:13:43 -07:00
Yunsup Lee	6916e5cbfb	coreplex: better names for RocketTiles in Verilog (#890)	2017-07-25 16:35:31 -07:00
Andrew Waterman	d43f02268b	Merge pull request #889 from freechipsproject/acq-before-rel-and-jump-in-frontend ... Acquire before release; jump in frontend	2017-07-25 16:26:47 -07:00
Wesley W. Terpstra	c2b8b08461	tilelink: fix Fragmenter source re-use bug (#888) ... Consider the following waveform for two 4-beat bursts: ---A----A------------ -------D-----DDD-DDDD Under TL rules, the second A can use the same source as the first A, because the source is released for reuse on the first response beat. However, if we fragment the requests, it looks like this: ---3210-3210--------- -------3-----210-3210 ... now we've broken the rules because 210 are twice inflight. To solve this, we alternate an a.source bit every time D completes a txn.	2017-07-25 16:23:55 -07:00
Andrew Waterman	15878d4691	Perform some control-flow transfers within the Frontend	2017-07-25 15:19:16 -07:00
Andrew Waterman	62c4080585	Add RVC instruction patterns	2017-07-25 15:19:16 -07:00
Andrew Waterman	66d06460fa	Add option for acquire-before-release	2017-07-25 15:19:16 -07:00
Andrew Waterman	86ccd935fc	Add method to print perf events	2017-07-25 15:19:16 -07:00
Andrew Waterman	5df8f0d1ea	Add L2 TLB miss counter	2017-07-25 15:19:16 -07:00
Andrew Waterman	3ced04b70a	Mix in trait to connect global_reset_vector	2017-07-25 15:19:16 -07:00
Yunsup Lee	c9e467a668	coreplex: retire RTCPeriod & introduce PeripheryBusParams.frequency (#887)	2017-07-25 00:55:55 -07:00
Wesley W. Terpstra	68ed055f6d	chiplink: adjust bus view to include the splitter (#886)	2017-07-24 21:41:17 -07:00
Yunsup Lee	dc435af30a	fix HasRTCModuleImp (#885)	2017-07-24 20:24:59 -07:00
Henry Cook	01ca3efc2b	Combine Coreplex and System Module Hierarchies (#875) ... * coreplex collapse: peripherals now in coreplex * coreplex: better factoring of TLBusWrapper attachement points * diplomacy: allow monitorless :*= and :=* * rocket: don't connect monitors to tile tim slave ports * rename chip package to system * coreplex: only sbus has a splitter * TLFragmenter: Continuing my spot battles on requires without explanatory strings * pbus: toFixedWidthSingleBeatSlave * tilelink: more verbose requires * use the new system package for regression * sbus: add more explicit FIFO attachment points * delete leftover top-level utils * cleanup ResetVector and RTC	2017-07-23 08:31:04 -07:00
Megan Wachs	f2002839eb	TLFragmenter: Continuing my spot battles on requires without explanatory strings (#882)	2017-07-21 21:55:32 -07:00
Yunsup Lee	21954c1c73	tileink: FIFOFixer should cope with zero-latency devices	2017-07-19 19:38:27 -07:00
Howard Mao	4d784ad693	add cloneType to RegisterWriteIO and RegisterReadIO (#874)	2017-07-18 18:52:31 -07:00
Wesley W. Terpstra	a9c58e9d9f	diplomacy: support creating ShiftQueues as well	2017-07-18 14:57:02 -07:00
Wesley W. Terpstra	c0a3bb58e9	ShiftQueue: use Vec of Bool to support constant prop of enq.valid	2017-07-18 14:56:59 -07:00
Wesley W. Terpstra	416629b3bf	tilelink: FIFOFixer should fix no domain => domain cases (#873)	2017-07-17 22:32:17 -07:00
Wesley W. Terpstra	d09a985729	zero: fix attachment in multichannel case (#870)	2017-07-17 21:48:31 -07:00
Wesley W. Terpstra	fc75ada577	tilelink: Monitor should report line numbers of connection that failed (#872)	2017-07-17 21:29:14 -07:00
Howard Mao	ec57994784	fix the TLFuzzer IO (#869)	2017-07-17 14:59:35 -07:00
Wesley W. Terpstra	16e8709144	tilelink: it is now legal to have errors on {Release,Hint}Ack (#864)	2017-07-14 16:13:30 -07:00
Richard Xia	9ade7af013	Merge pull request #862 from freechipsproject/plic-max-pri-dts ... PLIC: Add maxPri as well as ndev in DTS	2017-07-13 17:08:21 -07:00
Richard Xia	f0481801df	Merge pull request #863 from freechipsproject/rename-offchip-interrupts-to-external-interrupts ... Rename offchip-interrupts to external-interrupts.	2017-07-13 16:52:57 -07:00
Megan Wachs	35464782b5	PLIC: maxPriorities comes from params	2017-07-13 15:57:10 -07:00
Richard Xia	d62787357b	Rename offchip-interrupts to external-interrupts.	2017-07-13 15:56:22 -07:00
Shreesha Srinath	f2533ce825	bootrom: Adding bootrom parameters (#857) ... BootROM parameters currently control the boot rom address, size, and the hang which essentially sets the reset vector. This commit allows specifying different parameter values as required.	2017-07-13 13:40:02 -07:00
Megan Wachs	f646bed3ea	PLIC: Use longer DTS name for Max Priorities. ... I used the singular because there is really only one max priority	2017-07-13 13:37:22 -07:00
Megan Wachs	0800fd3ed9	PLIC: Add maxPri as well as ndev in DTS	2017-07-13 13:18:50 -07:00
Wesley W. Terpstra	b7f1ba3428	tilelink: FIFOFixer must support null cases (#860) ... In particular, it is ok if no slaves actually need FIFO fixing. It is also ok if none of those fixed are FIFO.	2017-07-12 22:20:31 -07:00
Wesley W. Terpstra	4eface8a9e	rocket: do not require FIFO order for memory-like regions	2017-07-12 17:39:00 -07:00
Wesley W. Terpstra	09b9d33a9a	tilelink: FIFOFixer now has a policy parameter	2017-07-12 17:38:55 -07:00