riscv/rocket-chip
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534 Commits

Author SHA1 Message Date
Andrew Waterman
7dde7099d2 use broadcast hub and coherent HTIF 2012-03-14 16:44:35 -07:00
Yunsup Lee
b19d783fbd add vector irq handler 2012-03-14 14:15:28 -07:00
Yunsup Lee
040d62f372 refactored vector exception handling interface 2012-03-13 23:45:34 -07:00
Yunsup Lee
b100544b25 datapath to read out vector state 2012-03-13 23:45:34 -07:00
Yunsup Lee
5655dbd5da add vvcfg and vtcfg instructions 2012-03-13 23:45:34 -07:00
Andrew Waterman
ab6c9350db fix minor coherence bugs 2012-03-13 19:10:54 -07:00
Andrew Waterman
1788c34113 parameterize broadcast hub by # of tiles 2012-03-13 17:12:01 -07:00
Andrew Waterman
1492457df5 add probe replies to HTIF 2012-03-13 16:56:47 -07:00
Andrew Waterman
b0f798962c add probe unit 2012-03-13 16:43:51 -07:00
Huy Vo
fdffb124e3 Merge branch 'master' of github.com:ucb-bar/riscv-rocket 2012-03-13 12:34:39 -07:00
Huy Vo
6fd1527476 fix to rocket vec_dpath, updating makefiles to run xcpt test cases 2012-03-13 12:34:02 -07:00
Henry Cook
287bc1c262 Further refinement of tag_match/tag_hit signals 2012-03-13 11:48:12 -07:00
Andrew Waterman
d76b05bde1 fix way selection on D$ write upgrades 2012-03-13 02:21:02 -07:00
Andrew Waterman
fd29e00db0 support non-power-of-2 queue sizes 
need to manually wrap queue pointers.
 2012-03-13 01:58:28 -07:00
Henry Cook
cbf7b13341 fix hit logic for amos 2012-03-12 22:01:52 -07:00
Henry Cook
6229a33dc4 fixed cache controller flush unit deadlock 2012-03-12 22:01:52 -07:00
Henry Cook
ea0775643b fixed abort bug 2012-03-12 22:01:52 -07:00
Yunsup Lee
1ba5e7b865 changes to the vector exception interface 2012-03-11 21:38:47 -07:00
Yunsup Lee
113a94a21d add vector hold waits 2012-03-11 16:29:19 -07:00
Yunsup Lee
e42a4c767e don't stall on vector fences, keep replaying 2012-03-11 16:29:19 -07:00
Henry Cook
c5dd37ae80 bugfix in locking arbiter 2012-03-11 15:47:27 -07:00
Henry Cook
4ebf637642 More broadcast hub bugfixes 2012-03-11 14:17:27 -07:00
Henry Cook
a4d0025187 fix icache prefetch global_xact_id bug 2012-03-11 00:50:11 -08:00
Yunsup Lee
1aa4b0e93d going back to null coherence hub 2012-03-10 20:16:20 -08:00
Andrew Waterman
8ffdac9526 fix D$ store-upgrade bug 
loads to the same address as stores that cause an upgrade
could return the old value
 2012-03-10 15:50:10 -08:00
Andrew Waterman
4f4b990a4f fix null hub store ack bug 2012-03-10 15:19:12 -08:00
Yunsup Lee
44ff22a26f vector exception handler now handles prefetches correctly 2012-03-10 12:54:36 -08:00
Andrew Waterman
7eb73c325e fix signedness of zero fmul results 
We were using the FMA unit to compute rs1 * rs2 + 0.0 for fmul,
which incorrectly computes +0.0 when rs1 * rs2 == -0.0.  Now we
add -0.0 if rs1*rs2 is negative.
 2012-03-10 00:21:51 -08:00
Andrew Waterman
e3a68848e0 fix D$ critical paths and fix verilog build 2012-03-09 20:02:51 -08:00
Henry Cook
e591d83e91 Fixed global_xact_id propagation bug 2012-03-09 11:05:44 -08:00
Henry Cook
9319130483 Special cased NTILES == 1 due to log2up revision 2012-03-09 11:04:58 -08:00
Andrew Waterman
85504f0ddc fix bug in fence.i and improve test 2012-03-09 03:26:05 -08:00
Andrew Waterman
766bac88f8 refactor D$ writebacks and flushes 
MSHRs now arbitrate for writebacks and handle flushes.
 2012-03-09 02:55:46 -08:00
Andrew Waterman
ff2e47f380 Merge branch 'master' of github.com:ucb-bar/riscv-rocket 2012-03-09 02:08:55 -08:00
Yunsup Lee
a1b30282dd major refactoring on vector exception interface 2012-03-09 01:09:22 -08:00
Yunsup Lee
8acbe98f53 change how fence.*.cv works, now control processor stalls on the fence instruction 2012-03-08 23:32:31 -08:00
Henry Cook
22726ae646 icache and htif now obey require_ack field of TransactionReply. Avoids extraneous TransactionFinish on prefetcher-supplied icache data 2012-03-08 18:47:32 -08:00
Henry Cook
4d2e7172f6 Added require_ack field to TransactionReply bundle 2012-03-08 18:07:44 -08:00
Henry Cook
35c4bd4084 Hub addr comparison bug fix 2012-03-08 16:39:05 -08:00
Henry Cook
788ad327da Fixed dependency queue bug in Broadcast Hub 2012-03-08 11:36:10 -08:00
Henry Cook
7f43dee0c9 PriorityEncoder apply() no longer has recursive depth param 2012-03-08 01:04:26 -08:00
Andrew Waterman
5a7c5772a8 clearly distinguish PPN and cache tag 2012-03-07 23:11:17 -08:00
Andrew Waterman
941873bad1 coherence hub fixes 2012-03-07 21:03:44 -08:00
Henry Cook
7deff5fbe2 Broadcast hub bug fixes for load uncached mem req and store uncached xact rep 2012-03-07 11:40:49 -08:00
Andrew Waterman
c09eeb7fd2 fix D$ next-state logic 
it was using the CPU command from the wrong pipeline stage,
which was a don't-care with ThreeStateIncoherence.
 2012-03-07 01:42:08 -08:00
Andrew Waterman
a0c9452b86 change D$ to use FourStateCoherence protocol 
instead of ThreeStateIncoherence.
 2012-03-07 01:26:35 -08:00
Andrew Waterman
6e2610b0ad fix Mux1H for bundles 2012-03-06 23:38:36 -08:00
Yunsup Lee
81dcb194d3 new vector exception interface 2012-03-06 22:39:15 -08:00
Henry Cook
47a2097507 unified coherence trait functions 2012-03-06 17:33:11 -08:00
Henry Cook
3dd404dcf4 hub code cleanup 2012-03-06 17:01:47 -08:00
Henry Cook
c0ed010bc9 newTransactionOnMiss() 2012-03-06 15:54:41 -08:00
Henry Cook
962e5a54af Added store dependency queues to BroadcastHub. Minor improvements to utils. 2012-03-06 15:54:41 -08:00
Andrew Waterman
499c5b4a2e automatically infer MEM_TAG_BITS 2012-03-06 15:49:28 -08:00
Andrew Waterman
6e16b04ada implement transaction finish messages 2012-03-06 15:48:08 -08:00
Yunsup Lee
dba99e07a9 set MEM_TAG_BITS to 5 when HAVE_VEC is true, since NMSHR=4 2012-03-06 08:54:21 -08:00
Andrew Waterman
5f33ab24b0 fix merge conflict 
oops :(
 2012-03-06 02:02:53 -08:00
Andrew Waterman
5f12990dfb support memory transaction aborts 2012-03-06 00:35:02 -08:00
Henry Cook
950b5cd900 Added aborted data dequeueing state machine for BroadcastHub 2012-03-05 17:44:30 -08:00
Henry Cook
5c66a6699c Broadcast hub control logic bugfixes and code cleanup 2012-03-05 17:27:55 -08:00
Yunsup Lee
a950d526d2 add prefetch count queue 2012-03-05 12:09:41 -08:00
Yunsup Lee
d4ec7ff4d9 refined vector exception interface 2012-03-03 16:11:54 -08:00
Yunsup Lee
e28a551368 refactor code related to vector exceptions 
- revisied interfaces
- new instructions
 2012-03-03 15:15:00 -08:00
Yunsup Lee
f9fb3978ca fix store prefetch bug, it no longer occupies an entry in the sdq 2012-03-03 15:14:59 -08:00
Henry Cook
1b3307df32 Removed has_data fields from all coherence messages, increased message type names to compensate 2012-03-02 23:51:53 -08:00
Henry Cook
35f97bf858 Filled out 4 state coherence functions for cache 2012-03-02 21:58:50 -08:00
Henry Cook
00989c58bd Correction to probe reply w/ data handling 2012-03-02 17:20:22 -08:00
Andrew Waterman
1e1926ce63 flip direction of ioPipe to match ioDecoupled 2012-03-02 16:18:32 -08:00
Henry Cook
7406908d4a BroadcastHub can be elaborated by C and vlsi backends 2012-03-02 12:19:27 -08:00
Yunsup Lee
54baa0713c hack fence.g.cv to support waiting the control processor 2012-03-02 02:10:26 -08:00
Yunsup Lee
1054cec087 add vec countq interface 2012-03-02 00:43:32 -08:00
Yunsup Lee
8678b3d70c clean up ioDecoupled/ioPipe interface 2012-03-01 20:48:46 -08:00
Andrew Waterman
6d03d75835 improve D$ internal interfaces 2012-03-01 20:20:15 -08:00
Andrew Waterman
28cacd953f D$ cleanup - merge ReplayUnit and MSHRFile 2012-03-01 19:30:56 -08:00
Andrew Waterman
52101373e0 clean up D$ store data unit 2012-03-01 19:20:00 -08:00
Henry Cook
da39810bb2 Fixed elaboration errors in LockingArbiter and BoradcastHub. Fixed ioDecoupled direction error in XactTracker 2012-03-01 18:24:22 -08:00
Henry Cook
9d7707a0a2 Made xact_rep an ioValid, removed has_data member 2012-03-01 18:24:21 -08:00
Yunsup Lee
c7b01230f4 fix mul/div when waddr=0, can't believe torture didn't find this one 2012-03-01 10:15:27 -08:00
Henry Cook
c6162ac743 Unified hub ios. Fixed some hub elaboration errors. 2012-03-01 01:20:57 -08:00
Yunsup Lee
a8ef5e9e27 change NMSHR when HAVE_VEC is true 2012-03-01 01:07:47 -08:00
Yunsup Lee
6847160343 refactor arbiter priorities 2012-03-01 00:22:34 -08:00
Yunsup Lee
f641b44fb8 changes after the module uniquify bug fix 2012-02-29 22:00:59 -08:00
Henry Cook
813ffcbf3e Finished broadcast hub with split mem req types. Untested. 2012-02-29 17:58:15 -08:00
Yunsup Lee
4939b72ba5 Merge branch 'master' of github.com:ucb-bar/riscv-rocket 2012-02-29 17:12:02 -08:00
Yunsup Lee
20d0088f66 temporary fix to match bit widths for Mem 2012-02-29 17:09:31 -08:00
Henry Cook
008ad1f45b Added 'locking' arbiter that won't rearbitrate until the lock signal on the current winning input is low 2012-02-29 17:05:06 -08:00
Henry Cook
c723ef4c50 ioDecoupled now allows inner bundle to be used in covariant positions, i.e. it accepts subtypes 2012-02-29 16:46:16 -08:00
Andrew Waterman
c38065d0e8 clean up priority encoders 2012-02-29 16:13:14 -08:00
Andrew Waterman
b9ec69f8f5 add new Queue singleton 2012-02-29 14:21:42 -08:00
Andrew Waterman
012da6002e replace tile memory interface with ioTileLink 
work in progress towards coherent HTIF. for now, requests
are incoherently passed through a null coherence hub.
 2012-02-29 03:10:47 -08:00
Henry Cook
082b38d315 Broadcast hub nears completion. Still does not handle generation/arbitration for decoupled mem reqs. 2012-02-29 02:59:27 -08:00
Henry Cook
8ff6e21e3a Fixed race between read resps/reps and write req/reps in null hub 2012-02-29 00:44:03 -08:00
Andrew Waterman
c99f6bbeb7 separate memory request command and data 
also, merge some VLSI/C++ test harness functionality
 2012-02-28 19:06:23 -08:00
Henry Cook
040aa9fe02 Added temporary ioMemHub and made coherence hub implementations depend on it rather than ioMem 2012-02-28 17:33:32 -08:00
Daiwei Li
3f998b1353 send vcfg and setvl to vu prefetch queues 2012-02-28 14:54:48 -08:00
Henry Cook
5cc10337b4 Null coherence hub. Begin work on internal tracker logic 2012-02-27 19:10:15 -08:00
Andrew Waterman
2b1c07c723 replace ioDCache with ioMem 2012-02-27 18:36:09 -08:00
Andrew Waterman
1d41a41afa remove extraneous constants 2012-02-27 17:49:48 -08:00
Yunsup Lee
3d96a2d4f0 add fpu.dec.wen := false when HAVE_FPU is turned off 2012-02-27 14:00:58 -08:00
Henry Cook
f0588a0052 Added probe_req ready sigs, GenArray to Vec 2012-02-27 11:26:18 -08:00
Henry Cook
7a8f53a117 probe req transactors in coherence hub 2012-02-27 09:24:33 -08:00
Henry Cook
2275239f33 xact init transactors in coherence hub 2012-02-27 09:24:32 -08:00
Yunsup Lee
bfd0ae125e upgrade to new rocket/vu memory interface, fix amo nack bug in hellacache 2012-02-26 23:46:51 -08:00
Andrew Waterman
6e706c7c74 fix yet another AMO-related replay bug 2012-02-26 20:20:45 -08:00
Andrew Waterman
e12b9eae93 remove ext_mem interface 
hindsight is 20/20
 2012-02-26 18:53:39 -08:00
Andrew Waterman
2d04664a98 simplify cpu-cache interface 2012-02-26 18:26:29 -08:00
Andrew Waterman
ad713a5d83 fix icache ram depth; new chisel 2012-02-26 17:51:46 -08:00
Yunsup Lee
f3bb02b2ea refactored dmem arbiter 2012-02-26 17:38:08 -08:00
Huy Vo
93f41d3359 Merge branch 'master' of github.com:ucb-bar/riscv-rocket 2012-02-26 17:24:23 -08:00
Huy Vo
5b0f7ccf68 updating rocket code to lastest version of chisel, passes assembly tests in C++ and Verilog as long as you dont use the vector unit 2012-02-26 17:24:08 -08:00
Yunsup Lee
766a039ffe small changes to the dtlb arbiter 2012-02-26 16:19:50 -08:00
Daiwei Li
69260756bd change ppn and vpn in dtlb from ufix to bits 2012-02-26 02:54:31 -08:00
Yunsup Lee
49efe4b744 now vu steals cycles from the fpu's fma alu 2012-02-26 01:55:07 -08:00
Daiwei Li
47dbc2a417 head should be working again 2012-02-26 00:30:50 -08:00
Daiwei Li
569698b824 dtlb now arbitrates between cpu, vec, and vec pf 2012-02-25 22:05:30 -08:00
Yunsup Lee
94ba32bbd3 change package name and sbt project name to rocket 2012-02-25 17:09:26 -08:00
Yunsup Lee
946e0c6e4e add vector exception infrastructure 2012-02-25 16:37:56 -08:00
Yunsup Lee
3839e3a318 massive refactoring of vector constants 2012-02-25 15:55:36 -08:00
Henry Cook
3980120279 More stylish bundle param names, some hub progress 2012-02-25 15:27:53 -08:00
Henry Cook
db6d480778 Better foldR 2012-02-25 15:27:09 -08:00
Henry Cook
df97de0fd3 Better abstraction of data bundles 2012-02-25 12:57:01 -08:00
Henry Cook
4fa31b300b Added popcount util 2012-02-25 12:57:01 -08:00
Yunsup Lee
a1600d95db fix bug related to waddr and wdata in wb stage 
for the instructions which don't use waddr/wdata for writeback, the contents were getting overwritten by the ll ops
it manifested itself after cp imul were sharing the alu with the vu
 2012-02-25 12:21:10 -08:00
Yunsup Lee
137fd62007 refactor cpfences 2012-02-25 12:20:36 -08:00
Andrew Waterman
4121fb178c clean up mul/div interface; use VU mul if HAVE_VEC 2012-02-24 19:22:35 -08:00
Andrew Waterman
b3a3289d34 fix (?) external memory request nack interface 2012-02-24 01:42:33 -08:00
Daiwei Li
477f3cde02 added prefetch queues for vu 2012-02-24 00:44:13 -08:00
Yunsup Lee
63939efd0c fix ctrl vec iface hookup - final 2012-02-23 23:03:44 -08:00
Yunsup Lee
bf1e643913 fix ctrl vec iface hookup 2012-02-23 22:55:25 -08:00
Andrew Waterman
7b3cce79e3 allocate a primary miss on a prefetch 2012-02-23 22:40:24 -08:00
Yunsup Lee
2ea309cf80 bug fixes to ctrl_vec 2012-02-23 22:35:05 -08:00
Yunsup Lee
91a0bb6f61 add vector prefetch queues 2012-02-23 22:30:38 -08:00
Andrew Waterman
012028efaa fix fpga build 2012-02-23 22:19:38 -08:00
Henry Cook
52da831aa3 finished xact_finish and xact_abort transactors in coherence hub 2012-02-23 18:12:50 -08:00
Henry Cook
1c1ce7d60b finished xact_rep transactor in coherence hub 2012-02-23 17:50:02 -08:00
Andrew Waterman
5332bab6f1 expose FMA ports outside of FPU (for the VU) 2012-02-23 17:39:34 -08:00
Andrew Waterman
6ceaa0e80a correct and simplify replay_next logic 2012-02-23 16:52:52 -08:00
Andrew Waterman
f939088be1 move datapath control signals into control unit 
because that's where control signals go
 2012-02-23 16:52:52 -08:00
Yunsup Lee
e53792a1eb fix bug in rocket's vector datapath related to wakeup 2012-02-23 10:14:14 -08:00
Andrew Waterman
7c929afe2b HTIF now controls CPU reset 2012-02-22 19:30:03 -08:00
Andrew Waterman
3eebf40310 nack CPU requests during any replay 2012-02-22 18:37:13 -08:00
Henry Cook
62837537f4 Improved TileIO organization, beginnings of hub implementation 2012-02-22 18:24:52 -08:00
Henry Cook
24a32c2811 Refining tilelink interface 2012-02-22 12:15:47 -08:00
Henry Cook
18bd0c232b Added coherence message type enums 2012-02-22 12:15:47 -08:00
Daiwei Li
22f8dd0994 Hook up resp_type to vector unit 2012-02-21 18:20:32 -08:00
Andrew Waterman
cfd79c731b add resp_type to ext_mem interface 2012-02-21 17:42:00 -08:00
Andrew Waterman
9a80adef50 only instantiate VI$ if HAVE_VEC 2012-02-21 15:53:19 -08:00
Andrew Waterman
c8f768c8b3 fix AMO replay bug 
like the recent AMO bug fix, but affects stores too.  oops.
 2012-02-21 14:39:54 -08:00
Andrew Waterman
d5608b2728 fix AMO replay bug 
didn't check for structural hazard on AMO unit
if a replay was initiated one cycle before before
a hit-under-miss AMO was issued
 2012-02-21 01:02:16 -08:00
Andrew Waterman
6135615104 unify cache backend interfaces; generify arbiter 2012-02-20 00:51:48 -08:00
Andrew Waterman
7034c9be65 new htif protocol and implementation 
You must update your fesvr and isasim!
 2012-02-19 23:15:45 -08:00
Andrew Waterman
9af86633d7 invalidate I$ prefetcher when invalidating I$ 2012-02-17 17:56:01 -08:00
Henry Cook
e555fd3fc4 Abstract class for coherence policies 2012-02-16 12:59:38 -08:00
Henry Cook
d46e59a16d Abstract base nbcache class 2012-02-16 12:34:51 -08:00
Henry Cook
124efe5281 Replace nbcache manipulation of meta state bits with abstracted functions 2012-02-16 10:43:40 -08:00
Henry Cook
619929eba1 Added coherence tile function defs, with traits and constants 2012-02-16 00:16:45 -08:00
Andrew Waterman
1b5e39e7fc fix bug in BTB 
a BTB update followed by a taken branch could cause incorrect control flow.
 2012-02-15 21:36:08 -08:00
Andrew Waterman
fc5ba769da disable vector unit by default 2012-02-15 18:58:41 -08:00
Andrew Waterman
8b3b3abd3d fix external memory request nack logic 2012-02-15 18:57:40 -08:00
Andrew Waterman
fe2c1d1321 add vec->ctrl fences 2012-02-15 18:31:19 -08:00
Yunsup Lee
82cd3625c2 add in vackq interface 2012-02-15 17:53:24 -08:00
Andrew Waterman
c13524ad3a fix vcmdq full replay logic 2012-02-15 17:49:12 -08:00
Yunsup Lee
258d050e1b add stall logic for vector command queues 2012-02-15 14:48:41 -08:00
Yunsup Lee
32bdf5098a refactor vector control logic & datapath in the rocket core 2012-02-15 13:30:22 -08:00
Yunsup Lee
7c11c1406c vector-vector add working! 2012-02-15 02:28:07 -08:00
Yunsup Lee
6bdf9dc513 hwacha integration: now it compiles correctly! 2012-02-14 23:34:57 -08:00
Yunsup Lee
a51c7cc927 new build system with updated chisel, hwacha 2012-02-14 19:43:59 -08:00
Andrew Waterman
0ec7767c13 declaring success on FPU for now 2012-02-14 19:11:57 -08:00
Andrew Waterman
297223a13c squash subsequent external mem request after nack 2012-02-14 15:12:16 -08:00
Andrew Waterman
38c67e5a9e add fmin.[s|d] and fmax.[s|d] 2012-02-14 06:37:18 -08:00
Andrew Waterman
ee9fc10668 add fcvt.s.d, fcvt.d.s 2012-02-14 06:03:43 -08:00
Andrew Waterman
ce202c73d1 add fsgnj[n|x].[s|d] 2012-02-14 04:24:35 -08:00
Andrew Waterman
1d604bcd49 remove top-level Makefile 
new, simpler build instructions are in the README.
note that for "make run-asm-tests-debug" you need to update your fesvr.
 2012-02-14 02:53:43 -08:00
Andrew Waterman
15dc2d8c40 add fp writeback arbitration logic 2012-02-14 00:32:25 -08:00
Henry Cook
0671a99712 NBcache works with associativities other than powers of 2 2012-02-13 21:44:32 -08:00
Henry Cook
6d36168183 Fixed two associative nbcache bugs, one in amo replays and one in the flush unit 2012-02-13 21:44:32 -08:00
Andrew Waterman
0366465cb1 parameterize the scoreboards 2012-02-13 18:12:23 -08:00
Andrew Waterman
6c2d8a37ae remove a partial update that makes chisel barf 
chisel regards it as a combinational loop, even though it isn't.
 2012-02-13 16:45:29 -08:00
Andrew Waterman
c78c738f60 minor cleanups 2012-02-13 03:13:49 -08:00
Andrew Waterman
b5a19a54a3 add fcvt.[s|d].[w|l][u] 2012-02-13 02:01:26 -08:00
Andrew Waterman
a4a9d2312c add fcvt.[w|l][u].[s|d], f[eq|lt|le].[s|d] 2012-02-13 01:30:01 -08:00
Andrew Waterman
069037ff3a add FP recoding 2012-02-12 23:31:50 -08:00
Andrew Waterman
25ecfb9bbc clean up caches 
- remove incompatible blocking D$
- remove direct-mapped nonblocking cache
 2012-02-12 20:32:06 -08:00
Andrew Waterman
08b6517a23 add FP ops mftx, mxtf, mtfsr, mffsr 2012-02-12 20:12:53 -08:00
Andrew Waterman
9bb1558a34 WIP on FPU 2012-02-12 04:36:01 -08:00
Andrew Waterman
50a283d311 move store data generation into EX stage 
doing so removes it from the critical path of FP store unrecoding.
 2012-02-12 01:35:55 -08:00
Andrew Waterman
725190d0ee update to new chisel 2012-02-11 17:20:33 -08:00
Andrew Waterman
f8b937d590 fix 32-bit divider bug 
thanks, torture!

also, tidied up the code a bit.
 2012-02-09 03:47:59 -08:00
Andrew Waterman
03ee49f424 fix 32-bit AMOs to upper halves of 64-bit words 
thanks, torture!
 2012-02-09 03:31:47 -08:00
Yunsup Lee
f47d888feb vvcfgivl and vsetvl works 2012-02-09 02:35:21 -08:00
Andrew Waterman
92493ad153 fix mul/div kill bug 
occasionally, an in-progress multiply or divide could be
erroneously killed, tying up the register forever.
 2012-02-09 02:26:03 -08:00
Andrew Waterman
128ec567ed make BTB fully associative; don't use it for JALR 
JALR created a long path from the ALU in execute stage
to an address comparator to the next-PC mux.  the benfit
was close to nil, anyway.
 2012-02-09 01:34:00 -08:00
Yunsup Lee
fcc8081c4d hook up the vector command queue 2012-02-09 01:28:16 -08:00
Andrew Waterman
8b6b0f5367 add external memory request interface for vec unit 2012-02-08 22:30:45 -08:00
Yunsup Lee
9285a52f25 initial vu integration 2012-02-08 21:43:45 -08:00
Andrew Waterman
10b5a0006c fix mul/div to rd=0 2012-02-08 20:11:57 -08:00
Andrew Waterman
a1855b12c2 clean up queues 2012-02-08 17:55:05 -08:00
Andrew Waterman
990e3a1b34 fix fpu port direction bug 2012-02-08 15:19:26 -08:00
Andrew Waterman
b3f6f9a5fd fix BTB misprediction check for negative addresses 
also index BTB with PC, not PC+4
 2012-02-08 15:05:28 -08:00
Andrew Waterman
e9da2cf66a improve id/ex datapath 
move operand selection into decode stage; simplify bypassing
 2012-02-08 06:47:26 -08:00
Andrew Waterman
d471a8b2da arbitrate for LLFU writebacks in MEM stage 2012-02-08 04:21:05 -08:00
Andrew Waterman
ebed56500e fix mul/wb hazard checks 
I erroneously assumed that those instructions set id_wen.
 2012-02-08 01:56:11 -08:00
Andrew Waterman
5403d069e9 add fp loads/stores 2012-02-07 23:54:25 -08:00
Christopher Celio
1be9d15944 Fixed bug regarding case sensitivity regarding ioICache,ioDCache 2012-02-07 14:07:42 -08:00
Andrew Waterman
fde8e3b696 clean up bypassing/hazard checking a bit 2012-02-06 17:26:45 -08:00
Henry Cook
41c4e10c37 Workaround for another frakking extraction error in the C backend. C and VLSI backends now both boot kernel with associativity on 2012-02-02 21:53:57 -08:00
Andrew Waterman
99a959e6b1 remove pc+4 piperegs and add new ex pc+4 adder 2012-02-02 13:33:27 -08:00
Andrew Waterman
01a156eb98 make # of dcache lines configurable 2012-02-01 21:11:45 -08:00
Andrew Waterman
b1bbf56b74 clean up wb->id bypass 2012-02-01 16:41:18 -08:00
Henry Cook
c5a4eaa0a1 Associative cache, boots kernel 2012-02-01 13:26:04 -08:00
Henry Cook
281abfbccb New Mux1H constructor 2012-02-01 13:24:28 -08:00
Andrew Waterman
38c9105ea1 fix mul/div deadlock bug 
If independent multiplies or independent divides were issued
back-to-back, the second wouldn't execute, causing the register
to be busy forever.
 2012-01-30 21:14:28 -08:00
Andrew Waterman
bd241ea237 fix when badvaddr is set 2012-01-30 17:15:42 -08:00
Andrew Waterman
a96c92f58d enable amomin[u]/amomax[u 2012-01-26 20:45:04 -08:00
Andrew Waterman
a7999d4525 don't flush I$ unless fence.i commits 
otherwise, we might not make forward progress.
 2012-01-26 20:37:09 -08:00
Andrew Waterman
32f5f420f3 Merge branch 'master' of github.com:ucb-bar/riscv-rocket 2012-01-26 20:12:42 -08:00
Andrew Waterman
41855a6d47 fix missing "otherwise" in PCR file 
this fixes timer interrupts for VLSI backend.
 2012-01-26 19:33:55 -08:00
Andrew Waterman
7172ddd050 don't flush pipeline after MFPCR 2012-01-24 18:40:08 -08:00
Andrew Waterman
97c379f1d7 made I$ associative 2012-01-24 16:51:30 -08:00
Henry Cook
aa3465699b LFSR now a util 2012-01-24 15:26:19 -08:00
Andrew Waterman
7f26fe2c44 make icache size parameterizable 2012-01-24 15:13:49 -08:00
Henry Cook
8229d65adf Associative cache passes asm tests and bmarks with power of 2 associativities (including 1) 2012-01-24 11:41:44 -08:00
Andrew Waterman
9e6b86fe85 Fix a nasty replay bug 
If a mispredicted branch was followed by an instruction dependent
on a load that missed in the cache, the mispredicted path would
be executed rather than the correct path. Fail.

Example broken code:

lw   x2, 0(x2)          # cache miss
beq  x3, x0, somewhere  # mispredicted branch
move x4, x2             # wrong-path instruction dependent on load miss
 2012-01-24 03:40:01 -08:00
Andrew Waterman
06fdf79dab fix long-latency writeback arbitration bug 2012-01-24 00:56:47 -08:00
Andrew Waterman
f1c355e3cd check pc/effective address sign extension 2012-01-24 00:15:17 -08:00
Andrew Waterman
a5a020f97b update chisel and remove SRAM_READ_LATENCY 2012-01-23 20:59:38 -08:00
Henry Cook
8766438bb9 Updated chisel removes ^^ from language. Removed from rocket source, updated jar. 2012-01-23 17:09:23 -08:00
Andrew Waterman
e7bf07d55e fix AMO replay bug 2012-01-23 15:35:53 -08:00
Andrew Waterman
d59bddfbf1 fix I$ miss replay bug 2012-01-21 20:42:13 -08:00
Andrew Waterman
31c56228e2 add missing "otherwise" 2012-01-21 20:13:15 -08:00
Henry Cook
97f0852b17 DM cache with assoc-aware subunits passes all asm and bmarks 2012-01-18 17:53:26 -08:00
Henry Cook
8623d58724 split into two caches, compiles 2012-01-18 17:09:35 -08:00
Henry Cook
29ed8eb31a More utils for nbdcache 2012-01-18 17:09:35 -08:00
Henry Cook
7e25749581 Groundwork for assoc cache implementation 2012-01-18 17:09:35 -08:00
Andrew Waterman
07f184df2f adhere to new chisel c naming convention 2012-01-18 15:23:21 -08:00
Henry Cook
1d76255dc1 new chisel version jar and find and replace INPUT and OUTPUT 2012-01-18 14:39:57 -08:00
Andrew Waterman
e4cf6391d7 fix i$ miss pathology and badvaddr bug 2012-01-17 23:47:35 -08:00
Andrew Waterman
0369b05deb move replays to writeback stage 2012-01-17 21:12:31 -08:00
Andrew Waterman
1c8f496811 fix fpga build 2012-01-13 20:04:11 -08:00
Andrew Waterman
addfe55735 add FPGA memory generator script 2012-01-13 18:19:08 -08:00
Andrew Waterman
acf3134e80 minor control logic cleanup 2012-01-12 14:19:18 -08:00
Andrew Waterman
4807d7222b use replay to handle I$ misses 
this eliminates a long path in the fetch stage
 2012-01-11 19:20:20 -08:00
Andrew Waterman
1a7bfd4350 remove icache req_rdy signal 2012-01-11 18:27:11 -08:00
Andrew Waterman
bcb55e581a remove host.start signal, use reset instead 2012-01-11 17:49:32 -08:00
Andrew Waterman
92dda102b6 slight control logic cleanup 2012-01-11 16:56:40 -08:00
Andrew Waterman
938b142d64 require writes to memory to be uninterrupted 2012-01-03 18:41:53 -08:00
Andrew Waterman
142dfc6e07 made tohost/fromhost 64 bits wide 2012-01-03 15:09:08 -08:00
Andrew Waterman
20aee36c96 move PCR writes to WB stage 2012-01-02 15:42:39 -08:00
Andrew Waterman
3045b33460 remove second RF write port 
load miss writebacks are treated like mul/div now.
 2012-01-02 02:51:30 -08:00
Andrew Waterman
ffe23a1ee8 fix WAW hazard handling 2012-01-02 00:25:11 -08:00
Andrew Waterman
eb657dd250 reduce superfluous replays 
we only replay after a cache miss if we mis-scheduled the use of a load.
 2012-01-01 21:28:38 -08:00