riscv/rocket-chip
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890 Commits

Author SHA1 Message Date
Andrew Waterman
7bb7299018 Don't pollute BTB with PC+4 target predictions 2014-10-14 17:28:37 -07:00
Christopher Celio
59eb7d194d Finalize superscalar btb. 2014-10-03 16:08:08 -07:00
Andrew Waterman
cde7c9d869 simplify CSR decoding code 2014-10-03 14:31:26 -07:00
Christopher Celio
99614e37aa Merge remote-tracking branch 'origin/master' into ss-frontend 
Conflicts:
	src/main/scala/btb.scala
	src/main/scala/core.scala
 2014-10-03 04:22:58 -07:00
Christopher Celio
9cc35dee9a Returned history update to fetch. 
- Global history only contains branches.
   - Only update BHT and history on BTB hits.
   - Gate off speculative update on stall or icmiss.
   - Fixed bug where BHT updates were delayed a cycle.
 2014-09-29 21:41:07 -07:00
Christopher Celio
8ccd07cfeb Moved updating global history from fetch to decode. 
- No longer update global history in fetch stage.
   - Only update global history when instruction is a branch.
   - Does allow for the possibility of back-to-back branches to see
     slightly different histories on subsequent executions.
 2014-09-28 05:16:36 -07:00
Christopher Celio
681b43f398 Bug fixes with global history register. 
- Updated in fetch speculatively.
      * Updates gated off by cpu.resp.fire().
      * BTB direction factored into history update.
   - All branches update the BHT.
   - Each instruction carries history; index into BHT is recomputed by
     passing in mem_reg_pc.
 2014-09-26 10:39:57 -07:00
Christopher Celio
a71bdbbc54 Update history register in fetch speculatively 2014-09-26 05:42:08 -07:00
Christopher Celio
f917810061 Removed RocketCoreParameters from use. 
- The nbdache (among others?) use CoreParameters, which has nothing to do with RetireWidth requirements.
   - This conflicts with other cores which uses nbdcache.
   - RocketCoreParameters may be unneccessary, and the require() check can be moved deeper into Rocket.
 2014-09-26 05:14:50 -07:00
Christopher Celio
868e747656 Factored out Rocket specifics from CoreParameters 
- Added new RocketCoreParameters
   - Other cores using Rocket as a library will no longer conflict against
      Rocket's requires().
 2014-09-25 18:52:58 -07:00
Henry Cook
8eb64205f5 bug fix for nbdcache s2_data 2014-09-25 12:00:20 -07:00
Henry Cook
b55c38cdc7 Remove spurious vec consts 2014-09-25 12:00:20 -07:00
Adam Izraelevitz
3e256439c9 Add abstract class Tile 2014-09-24 13:04:20 -07:00
Christopher Celio
180d3d365d Expanded front-end to support superscalar fetch. 2014-09-17 14:24:03 -07:00
Yunsup Lee
8abf62fae3 add LICENSE 2014-09-12 18:06:41 -07:00
Andrew Waterman
a999c055ed Don't take an interrupt when EX stage PC is invalid 
It was possible to take an interrupt on the instruction in the shadow of
a short forward branch.  EPC would thus get the wrong value, and so
a wrong-path instruction would be executed upon return from interrupt.

h/t Yunsup
 2014-09-11 01:46:52 -07:00
Henry Cook
5eb5e9eaf5 Standardize ()=>Module(...) top-level Parameters 2014-09-07 17:54:41 -07:00
Henry Cook
b42a2ab40a Final parameter refactor 2014-09-01 13:28:58 -07:00
Henry Cook
6a4193cf90 minor cache param cleanup 2014-08-19 11:38:46 -07:00
Henry Cook
2de268b3b1 Cache utility traits. Completely compiles, asm tests hang. 2014-08-19 11:38:20 -07:00
Henry Cook
ca5f38ff26 a few more fixes. some param lookups fail (here() in Alter blocks) 2014-08-19 11:38:11 -07:00
Henry Cook
0dac9a7467 Full conversion to params. Compiles but does not elaborate. 2014-08-19 11:38:02 -07:00
Adam Izraelevitz
4e6d69892d Added initial brainstorm for parameter hierarchical flattening, does not compile ;) 2014-08-19 11:37:50 -07:00
Adam Izraelevitz
812353bace Ported FPU parameters to new Chisel Parameters 2014-08-19 11:37:27 -07:00
Andrew Waterman
7bffc6c586 rename Unsigned.size to Unsigned.clog2 2014-06-14 13:58:07 -07:00
Andrew Waterman
3828c628c3 Remove vestigial control signals 2014-06-14 13:58:07 -07:00
Andrew Waterman
04593d433e clean up Int <-> Boolean conversion stuff 2014-06-14 13:58:07 -07:00
Andrew Waterman
ac88ded35a Use ROMs to reduce node count and improve QoR a bit 2014-06-14 13:58:07 -07:00
Andrew Waterman
88899eafe0 Reduce node count a bit 2014-06-14 13:58:07 -07:00
Jim Lawson
0c93567dea Replace needWidth() with getWidth. 2014-06-13 14:58:52 -07:00
Jim Lawson
de32595fba Quick change to work with new Width class. 2014-06-13 12:00:50 -07:00
Henry Cook
dab675b231 refactor Metadata, clean and expand coherence API 2014-05-28 16:05:48 -07:00
Andrew Waterman
8bc1c33540 Fix BTB error (requires Chisel update) 2014-05-19 18:56:30 -07:00
Andrew Waterman
cbb37ccc3e Use Mem instead of Vec[Reg] 2014-05-18 19:25:43 -07:00
Andrew Waterman
e91e12ed88 Fix RoCC accumulator example 2014-05-14 16:17:39 -07:00
Andrew Waterman
4ca152b012 Use BundleWithConf to avoid clone method boilerplate 2014-05-09 19:37:16 -07:00
Andrew Waterman
94c1f01ec6 Deanonymize CSRFile's IO bundle 2014-05-09 19:30:57 -07:00
Andrew Waterman
fd5f419eb1 use getWidth instead of width 2014-05-09 19:30:57 -07:00
Andrew Waterman
0c13c00d08 Reduce node count by avoiding elsewhen :-( 2014-05-09 19:30:57 -07:00
Andrew Waterman
8dcc0cbb53 Fix bug with multiple DecodeLogics per module 2014-05-09 19:30:57 -07:00
Henry Cook
5bc6981414 fix metadata default, add bug TODO 2014-05-06 18:36:22 -07:00
Henry Cook
7d6a642c0c correct use of function value to initialize MetaDataArray 2014-05-06 13:00:00 -07:00
Henry Cook
7f690dd9c8 parameterize metadataarray 2014-05-01 01:45:45 -07:00
Henry Cook
519b2ea2b6 New metadata result trait 2014-04-26 19:08:56 -07:00
Henry Cook
1b156c6db9 TileLinkIO.GrantAck -> TileLinkIO.Finish 2014-04-26 15:18:21 -07:00
Henry Cook
fc825c7103 MetaData & friends moved to uncore/ 2014-04-23 16:23:51 -07:00
Henry Cook
f4d326b8d7 Prep in HellaCache for extracting MetaData to uncore 2014-04-23 15:43:31 -07:00
Henry Cook
5c62cff2ce put replacement policy in uncore and minor nbdcache cleanups 2014-04-22 16:53:20 -07:00
Andrew Waterman
09e2ec1f9e Fix sign of remainder when dividing by zero 
h/t chris
 2014-04-18 16:32:57 -07:00
Henry Cook
1fa505f9ff remove superfluous AVec object 2014-04-16 17:19:32 -07:00
Andrew Waterman
3520620fbd Remove D$ -> BTB path 2014-04-15 23:05:02 -07:00
Andrew Waterman
de492b3cf7 Fix critical path through integer scoreboard 2014-04-15 21:28:13 -07:00
Henry Cook
444d0449e3 io.cnt bug in serializer 2014-04-14 17:13:13 -07:00
Henry Cook
1da8ef2ddf Added serdes to decouple cache row size from tilelink data size 2014-04-10 12:34:12 -07:00
Henry Cook
910b3b203a removed AddressSpaceConstants, CacheConstants, and TileLinkSizeConstants 2014-04-10 12:32:44 -07:00
Henry Cook
ebdc0a2692 merge Aqcuire and AcquireData. cache line size coupled to tilelink data size 2014-04-10 12:09:52 -07:00
Stephen Twigg
e90f2484aa Sync with riscv-opcodes (csr register mapping) 2014-04-08 15:48:37 -07:00
Andrew Waterman
3ed8adf032 Add early out for MUL[W] (not MULH[[S]U]) 2014-04-07 23:48:02 -07:00
Andrew Waterman
927287da34 Bypass RAS push/pop 2014-04-07 23:47:53 -07:00
Andrew Waterman
f235fa0db6 Move branch resolution to M stage 2014-04-07 15:58:49 -07:00
Andrew Waterman
db59fc65ab Add return address stack 2014-04-01 15:01:27 -07:00
Andrew Waterman
e3b12e0b85 Make BTB more complexity-effective 
BTB entries reference a small number of unique pages, so we separate the
storage of pages from indices.  This makes much larger BTBs feasible.  It's
easy to exacerbate cycle time this way, so one-hot encoding is used as needed.
 2014-03-25 05:22:04 -07:00
Andrew Waterman
804b09c8c5 Frontend QoR tweaks 2014-03-25 05:20:24 -07:00
Andrew Waterman
6465e2df14 Make Int -> Bool conversions explicit 2014-03-24 04:36:53 -07:00
Andrew Waterman
1b030777ce Remove vestigial control signal 2014-03-24 04:36:12 -07:00
Andrew Waterman
5996418021 Fix exception behavior of fmin/fmax 2014-03-18 18:36:51 -07:00
Andrew Waterman
54cbf0c4f1 Add (unused) RV32 CSRs 2014-03-15 17:33:17 -07:00
Andrew Waterman
943d7ac80a Use LinkedHashSet/Map for simpler determinism 2014-03-15 17:31:48 -07:00
Donggyu Kim
53d62cb69d remove nondeterminism 2014-03-15 16:45:58 -07:00
Andrew Waterman
a0389645b7 New FP encoding; improved FP implementation 2014-03-11 18:58:24 -07:00
Andrew Waterman
00bc1a2293 Add fclass.{s|d} instructions 2014-03-10 16:59:24 -07:00
Yunsup Lee
ac4b3f9f22 print out core id 2014-03-04 23:38:49 -08:00
Andrew Waterman
9f2e16c58a Fix D$ arbiter for >2 inputs 2014-03-04 16:32:17 -08:00
Andrew Waterman
fa75f6e81e Fix null pointer exception when HAS_FPU=false 2014-03-04 16:32:09 -08:00
Andrew Waterman
c7110c8389 Make FPU pipeline depths configurable 2014-02-28 13:39:59 -08:00
Yunsup Lee
98b830201a add wen signal to dasm printf 2014-02-25 03:31:06 -08:00
Yunsup Lee
97b1841fcf change dcache tag bits to 7 2014-02-22 22:53:04 -08:00
Andrew Waterman
8e3ca609f7 Renumber uarch CSRs into custom CSR space 2014-02-14 17:40:00 -08:00
Andrew Waterman
a09ff9fdc7 Revert to old AUIPC definition 2014-02-10 19:04:42 -08:00
Andrew Waterman
1456170c6d Always stall decode on RoCC -> FENCE; never stall on RoCC -> deferred AMO.RL fence 2014-02-06 12:01:49 -08:00
Andrew Waterman
eca8c99f44 Ignore rocc interrupt line when no rocc is present 2014-02-06 03:06:55 -08:00
Andrew Waterman
e7a726fbac Make uarch counters read-only 2014-02-06 01:48:56 -08:00
Quan Nguyen
f021213b1d Merge remote-tracking branch 'origin/master' into hwacha-port 2014-02-06 00:21:28 -08:00
Andrew Waterman
62e9313aef Add 16 microarchitectural counters 2014-02-06 00:13:02 -08:00
Yunsup Lee
ff7cae29f7 hookup rocc interrupt and s bit 2014-02-06 00:09:42 -08:00
Yunsup Lee
ab4a3e937b don't share fma pipes 2014-02-05 14:21:43 -08:00
Stephen Twigg
6a02d15c21 Merge branch 'master' into hwacha-port 2014-02-04 17:05:03 -08:00
Henry Cook
2c2b3a7678 cleanups supporting uncore hierarchy 2014-01-31 12:07:26 -08:00
Andrew Waterman
febd26f505 Correct CSR privilege logic 2014-01-31 01:03:17 -08:00
Stephen Twigg
3c3c469725 Add exception signal to rocc interface 2014-01-28 22:13:16 -08:00
Andrew Waterman
0266c1f76a Support retirement width > 1 in CSR file 2014-01-24 16:37:40 -08:00
Andrew Waterman
267394d3cc Fix CSR interlocks 2014-01-24 16:37:40 -08:00
Andrew Waterman
1f986d1c96 Branches don't care about the ALU input/function 2014-01-24 16:37:40 -08:00
Andrew Waterman
a1b7774f5d Simplify handling of CAUSE register 2014-01-24 16:37:39 -08:00
Christopher Celio
a2be21361e Allow ICacheConfig to toggle fetch-width. 2014-01-22 16:19:57 -08:00
Andrew Waterman
a7489920ce Support CSR atomics on all CSRs, not just STATUS 2014-01-21 16:17:39 -08:00
Andrew Waterman
6ba2c1abe5 Use auto-generated CAUSE constants 2014-01-21 15:01:54 -08:00
Andrew Waterman
95de358a96 More of the same FPU fix 
some SP ops followed by DP stores were not working because they
were encoded as subnormals, not NaNs.
 2014-01-17 14:09:30 -08:00
Andrew Waterman
cf38001e98 Fix fmv.s.x -> fsd 2014-01-17 03:52:35 -08:00
Yunsup Lee
30b894c2c4 Merge remote-tracking branch 'origin/master' into hwacha-port 2014-01-16 16:04:48 -08:00
Yunsup Lee
6bbbf36979 push accel/rocket dmem port back to rocket 2014-01-16 16:01:41 -08:00
Andrew Waterman
57f4d89c90 Generate D$ replay_next signals correctly 2014-01-16 00:16:09 -08:00
Andrew Waterman
6ebdc4d94e Simplify store conditional failure code generation 2014-01-16 00:15:48 -08:00
Andrew Waterman
31060ea8ae Fix fubar long-latency writeback control logic 
Load miss writebacks happening at the same time as multiplication
wasn't working.  Hopefully this does it.
 2014-01-14 04:02:43 -08:00
Andrew Waterman
e8486817e6 Clean up formatting (i.e. remove tabs, semicolons) 2014-01-13 21:43:56 -08:00
Andrew Waterman
a50a1f7d50 Clean up multiplier/divider stuff 2014-01-13 21:37:16 -08:00
Andrew Waterman
4d236979bd Fix very far forward JALs 
We were sign-extending from the wrong bit, causing a backwards jump.
 2014-01-13 00:55:48 -08:00
Andrew Waterman
c546f66404 Swap JAL/JALR encodings (again) 2014-01-13 00:54:49 -08:00
Quan Nguyen
ebec444ad2 Increase tag width for configurable precision in Hwacha 2013-12-13 03:33:02 -08:00
Andrew Waterman
07a91bb99a Miscellaneous cleanup 2013-12-09 19:53:14 -08:00
Andrew Waterman
da3135ac9b Begin integer unit clean-up 
...to make it easier to generate the superscalar version of the core.
 2013-12-09 15:06:13 -08:00
Andrew Waterman
16d5250924 Correct FP trap behavior on FCSR 2013-12-05 04:18:04 -08:00
Andrew Waterman
5814a90472 Make DecodeLogic interface more flexible 2013-12-05 04:16:48 -08:00
Andrew Waterman
924261e2b2 Update to new privileged ISA... phew 2013-11-25 04:35:15 -08:00
Andrew Waterman
65b8340cea Mitigate D$ hit -> branch -> NPC critical path 2013-11-24 14:21:03 -08:00
Andrew Waterman
53f726008b Use Mem instead of Vec[Reg] for TLB 
QoR-neutral, improves simulation speed
 2013-11-24 14:21:02 -08:00
Yunsup Lee
d450b85483 Merge branch 'master', remote-tracking branch 'origin' into hwacha 2013-11-21 14:57:38 -08:00
Yunsup Lee
68e270eeb2 fix slli/slliw encoding bug 2013-11-21 14:44:58 -08:00
Quan Nguyen
3b109763ad Connect FMA to Hwacha pipes 2013-11-19 20:54:47 -08:00
Stephen Twigg
a662e85f2a Merge branch 'master' into hwacha 2013-11-14 16:02:44 -08:00
Yunsup Lee
c1966e2b0a forgot to put htif into uncore package 2013-11-07 15:42:03 -08:00
Yunsup Lee
da033af0b0 move htif to uncore 2013-11-07 13:18:46 -08:00
Yunsup Lee
4c56323f6f hookup all memory ports 2013-11-05 17:12:09 -08:00
Stephen Twigg
eae571e371 Remove rocc memory simplifye module (Hwacha has its own) 2013-11-05 15:31:03 -08:00
Andrew Waterman
12f0369e6e Simplify divide early out circuitry 2013-10-29 13:20:40 -07:00
Andrew Waterman
b44dafbdca Simplify branch offset mux 2013-10-29 13:20:40 -07:00
Andrew Waterman
23f7bab4f3 Reduce FMA pipeline depths 
FMA QoR has improved enough to allow this change.
 2013-10-29 13:20:40 -07:00
Yunsup Lee
1583560757 fix replay bug, don't respond when cmd is a NOP 2013-10-28 22:35:18 -07:00
Stephen Twigg
36b85b8ee2 Fix issue where the MSB of D$ req tag was getting lost for all agents when an accelerator was attached. 2013-09-25 11:51:10 -07:00
Stephen Twigg
891e459625 Export stats pcr register (#28 currently) to the top-level 2013-09-25 01:16:32 -07:00
Stephen Twigg
730a6ec76b AccumulatorExample now properly sets its busy bit. Also, pepper some helpful comments into AccumulatorExample 2013-09-24 16:32:49 -07:00
Andrew Waterman
81c752de84 Support disabling virtual memory 2013-09-24 13:58:47 -07:00
Andrew Waterman
adc386f889 Turn off virtual memory inside RoCC base class 2013-09-24 13:58:47 -07:00
Stephen Twigg
3532ae0b79 From Andrew, actually mark scoreboard when rocc instruction with a writeback is issued. Also, fix an issue with AccumulatorExample not properly tagging its memory requests. Finally, reverted changes from f27429c to more properly follow the spike model (always return previous value of accumulator). 2013-09-24 10:54:09 -07:00
Stephen Twigg
db1e09f0d0 Fix issues with RoCC AccumulatorExample stalls on memory interface 2013-09-23 00:21:43 -07:00
Stephen Twigg
158cee08af Adjust ordering of RoCCInstruction to reflect new ISA encoding. (Note: Fixes register op issues with AccumulatorExample but still slight issue with executing memory loads) 2013-09-22 03:18:06 -07:00
Andrew Waterman
1d2f4f8437 New ISA encoding, AUIPC semantics 2013-09-21 06:32:40 -07:00
Andrew Waterman
25ab402932 swap JAL, JALR encodings 2013-09-15 04:29:06 -07:00
Andrew Waterman
110e53cb48 Revert "Add early out to multiplier" 
This broke recently and I don't have time to figure out why.
 2013-09-15 04:15:32 -07:00
Andrew Waterman
88d1c47665 don't disassemble within chisel 2013-09-15 04:14:45 -07:00
Andrew Waterman
f12bbc1e43 working RoCC AccumulatorExample 2013-09-14 22:34:53 -07:00
Andrew Waterman
18968dfbc7 Move store data generation into cache 2013-09-14 16:15:07 -07:00
Andrew Waterman
a0cb711451 Start adding RoCC 2013-09-14 15:31:50 -07:00
Andrew Waterman
d053bdc89f Remove Hwacha from Rocket 
Soon it will use the coprocessor interface.
 2013-09-12 22:34:38 -07:00
Andrew Waterman
1edb1e2a0a Ignore LSB of PC 2013-09-12 17:55:58 -07:00
Andrew Waterman
59f5358435 Implement AQ/RL; move fence logic out of cache 2013-09-12 16:07:30 -07:00
Andrew Waterman
243c4ae342 sync up rocket with new isa 2013-09-12 03:44:38 -07:00
Andrew Waterman
95dd0d8be1 Remove DebugIO/error mode 2013-09-11 20:15:21 -07:00
Henry Cook
f9b85d8158 NetworkIOs no longer use thunks 2013-09-10 16:15:19 -07:00
Henry Cook
d06e24ac24 new enum syntax 2013-09-10 10:51:35 -07:00