riscv/rocket-chip
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1504 Commits

Author SHA1 Message Date
Andrew Waterman
4efcb5a139 Increase frontend decoupling (#722) 
Reduce pathological RVC stalls
 2017-05-03 07:54:46 -07:00
Henry Cook
05ca88fb47 Merge branch 'master' into pipeline-mmio 2017-05-03 01:59:59 -07:00
Megan Wachs
922a8ef5e0 local_interrupts: Correct off-by-1 if there is no SEIP 2017-05-02 21:55:25 -07:00
Henry Cook
4dd3345db2 Merge branch 'master' into pipeline-mmio 2017-05-02 16:23:26 -07:00
Andrew Waterman
3a1a37d41b Support PutPartial in ScratchpadSlavePort 2017-05-02 03:07:02 -07:00
Andrew Waterman
938b089543 Remove legacy devices that use AMOALU 
I'm going to change the AMOALU API, and so I'm removing dependent dead code.
 2017-05-02 03:05:41 -07:00
Andrew Waterman
f8151ce786 Remove subword load muxing in ScratchpadSlavePort 2017-05-02 00:14:46 -07:00
Andrew Waterman
044b6ed3f9 Improve logical ops in AMOALU 
As with integer ALU, shave off some muxing.
 2017-05-02 00:14:46 -07:00
Andrew Waterman
f49172b5bc ScratchpadSlavePort doesn't support byte/halfword atomics 2017-05-02 00:14:46 -07:00
Wesley W. Terpstra
fe280187a1 axi4: Fragmenter cuts all input channel readys 
AXI4 forbids any input to lead combinationally to an output.For the AXI4ToTL
direction, front-load the cuts for {AW, AR, W}.readyAXI4ToTL makes the R and
B channels irrevocable.
 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
3d06f01a2c rocket: turn on early ack for ITIM 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
58a4529cc5 axi4: the last missing piece for safe FIFO ordering 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
b0b5601e8d axi4: ToTL correct error handling 
If there is an illegal AWADDR = 0x2 on a 32-bit bus, remapping it
to an aligned address on the error device may make the mask
inconsistent with the address + size.
 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
661015a78d axi4: switch arbiter to round robin 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
976af7a8c7 tilelink2: better width inference for {left,right}OR 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
40f18e6e43 diplomacy: optimize IdRange overlap detection 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
30f1f1e7c7 rocket: turn on early ack for DTIM 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
6ee69454c3 tilelink2: Fragmenter now supports early Ack 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
e09fa866b7 tilelink2: FIFOFixer should NOT change client request status 
Just because some clients are not FIFO does not matter. Downstream
FIFOFixers will still present a legitimate single domain to those
client who care.
 2017-05-01 22:53:41 -07:00
Scott Johnson
b040a462c9 Wes's change to remove user bits from external AXI interface, and add 1 cycle latency to make sure external AXI is compliant 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
a71f708dc7 rocketchip: move the Error device to 0x3000 2017-05-01 22:53:41 -07:00
Wesley W. Terpstra
d27e1928dd axi4: make maxFlight a per-master parameter 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
e1a072a644 axi4: massage test cases into shape again 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
9f08c484bd tilelink2: ToAXI4 provide FIFO order semantics 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
61a6f94196 axi4: get unit tests legal again 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
bf5cb396b9 rocketchip: relax mmio no-interleaving requirement 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
24f577c156 axi4: Deinterleaver ensures R channel ID does not change till last 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
b4188ee625 axi4: ToTL supporting pipelined MMIO 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
ca2cb033cd rocketchip: fix uses of AXI4 Fragmenter 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
e100a943ea axi4: simplify Fragmenter by using user bits 2017-05-01 22:53:40 -07:00
Wesley W. Terpstra
7a1d107c9e rocketchip: include an ErrorSlave by default 2017-05-01 22:53:37 -07:00
Wesley W. Terpstra
641a4d577a tilelink2: Error device for returning errors on demand 2017-05-01 22:53:02 -07:00
Wesley W. Terpstra
a580b17ece axi4: IdIndexer => reduce number of needed ids 2017-05-01 22:53:01 -07:00
Wesley W. Terpstra
06efc01d96 axi4: an adapter to remove user bits 2017-05-01 22:53:01 -07:00
Wesley W. Terpstra
f1217519f1 axi4: RegisterRouter; concurrent response illegal in AXI 2017-05-01 22:53:01 -07:00
Wesley W. Terpstra
5163ccd11f axi4: RegisterRouter supports user bits 2017-05-01 22:53:01 -07:00
Wesley W. Terpstra
de6ea9b442 axi4: support user bits in SRAM 2017-05-01 22:53:01 -07:00
Wesley W. Terpstra
396ecacda4 AXI4: add an optional user bundle field 2017-05-01 22:53:01 -07:00
Andrew Waterman
d6e69066a5 Fix ITIM loads (#716) 
An incorrectly-set ready signal caused bad data to be read from the RAM.
 2017-05-01 17:41:25 -07:00
Andrew Waterman
dd85d7e0a0 I$: Don't raise io.resp.valid if io.s1_kill was high previous cycle 
@solomatnikov found the bug.  It doesn't manifest in Rocket because the
Frontend masks io.resp.valid with s2_valid.
 2017-04-28 16:44:58 -07:00
Megan Wachs
d67738204f Interrupts: Less Pessimistic Synchronization (#714) 
* 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
 2017-04-28 14:49:24 -07:00
Andrew Waterman
7416f2a17e Unbreak groundtest 2017-04-28 02:10:33 -07:00
Andrew Waterman
8fd5ecdff8 Set io.cpu.resp.bits.addr for MMIO loads without affecting QoR 2017-04-27 19:50:38 -07:00
Andrew Waterman
7c70aa593e Minor stylistic and QoR improvements to PLIC 2017-04-27 19:35:20 -07:00
Henry Cook
3d0ed80ef6 new parameters ResetVectorBits, MaxHartIdBits, and MaxPriorityLevels 2017-04-27 18:17:31 -07:00
Henry Cook
bdb526a9f0 coreplex: DefaultCoreplex => RocketPlex 2017-04-27 18:17:09 -07:00
Andrew Waterman
99de42d34c Swap order of ITIM WidthWidget and Fragmenter 
e99fa057ac accidentally reversed them
 2017-04-27 15:30:02 -07:00
Andrew Waterman
8c10caeef9 Express PMP mask generation with incrementer, not adder 
DC apparently doesn't always pick up the ((x + 1) ^ x) idiom.
Use (x + ~(x + 1)) instead.
 2017-04-27 15:16:29 -07:00
Henry Cook
e99fa057ac cleanup scratchpad nodes 2017-04-27 14:02:05 -07:00
Andrew Waterman
b2b4725522 Fix zero-width wire issues when ITIM is disabled 2017-04-26 22:43:00 -07:00
Andrew Waterman
e23ee274f6 Size hartid field with NTiles, not XLen 2017-04-26 20:11:43 -07:00
Andrew Waterman
dc753bfa95 Fix I$ elaboration when ITIM is disabled 2017-04-26 19:35:35 -07:00
Andrew Waterman
80d826b94a Make DTIM deduplicatable 2017-04-26 19:35:35 -07:00
Andrew Waterman
418879a47f Add Instruction Tightly Integrated Memory 2017-04-26 19:35:35 -07:00
Andrew Waterman
ee6702e5e0 Support indexing 1-entry Seqs 
It's a zero-width wire special case.

Closes #706.
 2017-04-26 19:35:35 -07:00
Andrew Waterman
2e23d46631 Use val instead of def in ECC calculations 
This allows nicer-looking code to avoid generating lots of redundant nodes.
 2017-04-26 19:35:35 -07:00
Megan Wachs
7ad4cc36f7 debug: Prevent writes to DATA/PROGBUF when busy 2017-04-26 11:11:21 -07:00
Henry Cook
7f5f1c7631 Merge branch 'master' into async_queue_option 2017-04-25 14:58:11 -07:00
Henry Cook
9bb0d92381 Merge branch 'master' into async_queue_option 2017-04-25 11:23:22 -07:00
Henry Cook
60d71efa36 ahb: make hreadyout fuzzing a sram parameter 2017-04-25 11:11:31 -07:00
Henry Cook
ca435c2f40 uncore: more verbose requires 2017-04-25 11:11:31 -07:00
Wesley W. Terpstra
f3ab23d068 dcache: fix stupidly wrong crossing comparison (#703) 2017-04-25 09:18:41 -07:00
Wesley W. Terpstra
4807ce7ced dcache: put a flow Q to absorb back-pressure without restarting pipeline (#701) 
* dcache: put a flow Q to absorb back-pressure without restarting pipeline

When used with a RationalCrossing, pipelined MMIO does not come out cleanly.
The first beat works, but if the second beat gets stalled, the pipeline is
restarted. This is a quick hacky test to absorb the beats. Perhaps a better
fix can be made to achieve the same effect.

* dcache: provision as few stages as possible
 2017-04-24 23:28:04 -07:00
Wesley W. Terpstra
9c1d126965 Allow speculative fetch to uncacheable memory if it hits in I$ (#700) 
@aswaterman it's in
 2017-04-24 19:12:37 -07:00
Wesley W. Terpstra
11ff4dfbb9 rocket: seip (int 9) is only present if VM is enabled (#699) 2017-04-24 15:58:33 -07:00
Wesley W. Terpstra
d0f3004097 tilelink2: help tools save some registers in the WidthWidget (#691) 2017-04-24 15:13:58 -07:00
Andrew Waterman
65928dc6a0 Don't push RAS for "auipc ra, X; jalr ra, ra, Y" 2017-04-24 02:01:15 -07:00
Andrew Waterman
36a7971975 Bypass scoreboard to reduce MMIO latency 2017-04-24 02:01:15 -07:00
Andrew Waterman
845e6f7458 Filter out duplicate test suites 
I botched the refactoring in 5934c7b4b9
 2017-04-24 02:01:15 -07:00
Andrew Waterman
f2d4cb8152 Update RAS speculatively from fetch stage 2017-04-24 02:01:15 -07:00
Andrew Waterman
3b2c15b648 Use tininess-after-rounding in FPU 2017-04-24 02:01:15 -07:00
Andrew Waterman
c36c171202 Use correct interrupt priority order 2017-04-24 02:01:15 -07:00
Andrew Waterman
bf861293d9 Add ShiftQueue; use it 2017-04-24 02:01:15 -07:00
Andrew Waterman
d24d8ff84b Don't stall the frontend, making it easier to add more features later 2017-04-24 02:01:15 -07:00
Andrew Waterman
061a0adceb Fetch smaller parcels from the I$ 2017-04-24 02:01:15 -07:00
Ben Keller
0aa8f7d61d Add narrowData option to AsyncQueue. 
This option reduces the number of wires that cross the clock boundary.
This can be a useful feature if the clock boundary coincides with
a voltage boundary, in which case the number of level shifters is reduced.
However, this introduces a path that crosses from sink->source->sink domain,
so the option is disabled by default.
 2017-04-21 16:31:17 -07:00
Megan Wachs
c72b15f2a0 Down with any require() statement that makes me RTFC 2017-04-21 15:44:42 -07:00
Henry Cook
54820e094d Make more require statements in diplomacy verbose (#693) 
* diplomacy: add more verbose requirements
* bump firrtl
 2017-04-20 13:18:39 -07:00
Henry Cook
ef8a819763 Miscellaneous periphery improvements (#689) 
* fifofixer: work around zero-width wires for single source id
* periphery: sourceshrinker takes maxInFlight parameter
 2017-04-20 11:28:00 -07:00
Megan Wachs
9002e7e532 debug: Debug Module needs to handle DMI NOPs even if DTM won't send them. 2017-04-20 10:19:50 -07:00
Megan Wachs
cc7f0a5b7a debug: whitespace cleanup 2017-04-20 10:19:50 -07:00
Megan Wachs
5934779082 debug: Clean up ValidReg assertion. 2017-04-20 10:19:50 -07:00
Megan Wachs
0c013a56c0 debug: Make DMI NOPs really NOPs. 
This simplifies SW design and CDC issues.
 2017-04-20 10:19:50 -07:00
Andrew Waterman
67404a665b When not using a cache, LR/SC isn't legal even on cacheable memory 2017-04-20 08:47:03 -07:00
Megan Wachs
1be13d6b4c PLIC: To avoid hazard between enable -> claim, enforce concurrency=1 2017-04-19 21:37:37 -07:00
Megan Wachs
3dfd584075 regmapper: remove the Pipe in the RegMapper Queue 
With this pipe here, devices which declare concurrency > 0
actually accept transactions on the same cycle they complete
the previous one. This is unexpected behavior.
 2017-04-19 21:37:37 -07:00
Wesley W. Terpstra
b4d17c76d1 coreplex: make rational+synchronous crossing configurable (#688) 2017-04-19 16:16:05 -07:00
Megan Wachs
408107447c debug: DMI response should be busy, not zero, when there is an error. (#685) 2017-04-18 21:41:52 -07:00
Andrew Waterman
d82a0dc231 Mitigate D$ exception critical path, yet again 2017-04-18 00:47:58 -07:00
Andrew Waterman
c99ce7ce5d Only report D$ exceptions on not-nacked accesses 2017-04-18 00:47:58 -07:00
Andrew Waterman
5934c7b4b9 Fix description of LR/SC test suites 2017-04-18 00:47:58 -07:00
Andrew Waterman
a956b78dd2 In TLBPermissions, merge across some region types 
We only care whether they have side effects or not.
 2017-04-18 00:47:58 -07:00
Andrew Waterman
6de6f38894 Pipeline D$ exception response into s2 2017-04-18 00:47:58 -07:00
Andrew Waterman
657f4d4e0c Permit early grant acks to broadcast hub 2017-04-18 00:47:58 -07:00
Andrew Waterman
cc9ec1d51a Send D$ grant acks early; accept release acks early 
We now need to block the B-channel for a few cycles after a grant to
allow the processor to get at least one request through, preventing
livelock.
 2017-04-18 00:47:58 -07:00
Andrew Waterman
728569c717 Reduce access-exception generation critical path 2017-04-18 00:47:58 -07:00
Andrew Waterman
a59a3f15e4 Disable LR/SC tests for scratchpad configs 2017-04-18 00:47:58 -07:00
Andrew Waterman
c366007a0d Tighten PMAs for LR/SC and misaligned accesses 
- LR/SC on cacheable memory only (not even scratchpad)
- No misaligned accesses on regions with get/put-effects
 2017-04-18 00:47:58 -07:00
Andrew Waterman
74a7838de0 In TLBPermissions, don't merge regions of different types 2017-04-18 00:47:58 -07:00
Andrew Waterman
7871ec82c4 Guarantee probe forward progress during LR storm 2017-04-18 00:47:58 -07:00