riscv/rocket-chip
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508 Commits

Author SHA1 Message Date
Andrew Waterman
6176b348dc Invalidate TL error bit in D$ once progress is made 2017-11-07 00:52:18 -08:00
Andrew Waterman
d8d4504995 Provide separate masks for local & global BusErrorUnit interrupts 2017-11-06 18:03:59 -08:00
Andrew Waterman
be3a3e0187 Generate local interrupt #128 on bus errors 
It doesn't have a correpsonding bit in mip/mie, so it isn't individually
maskable, nor is it delegable.
 2017-11-06 18:03:59 -08:00
Andrew Waterman
ac096a89e7 Make BusErrorUnit support 32-bit stores 
Otherwise it isn't too useful for RV32!
 2017-11-06 18:03:59 -08:00
Andrew Waterman
6357db0b12 Expose BusErrorUnit non-diplomatically for use as local interrupt 2017-11-06 18:03:59 -08:00
Andrew Waterman
bdda2cb145 Merge pull request #1089 from freechipsproject/aswaterman-patch-1 
Don't emit PTW covers when !usingVM
 2017-11-06 18:03:36 -08:00
Andrew Waterman
95d00b13cc Report ITIM slave port errors to BusErrorUnit 2017-11-06 12:39:17 -08:00
Andrew Waterman
c84848afa6 Report ITIM uncorrectable errors over D-channel 2017-11-06 12:32:45 -08:00
Andrew Waterman
989eeb78f9 Prevent some unnecessary pipeline replays 2017-11-06 11:04:06 -08:00
Andrew Waterman
c8bc487ab8 Use pseudo-LRU policy in BTB 
FIFO falls on its face if the working set doesn't fit in the BTB.
 2017-11-03 16:27:04 -07:00
Andrew Waterman
f859da85ff Disable covers that don't apply to DTIM 2017-11-03 15:38:13 -07:00
Andrew Waterman
d6ede818ee DTIM doesn't accept grants 2017-11-03 15:37:48 -07:00
Andrew Waterman
7bef935d2a Don't emit PTW covers when !usingVM 2017-11-03 15:03:27 -07:00
Andrew Waterman
3db066303b Fix ITIM bug overwriting I$ contents when deallocating ITIM (#1079) 
Workaround: disable interrupts and then do:

.align 3
sb x0, (t0) # t0 contains ITIM-deallocate address
fence.i
 2017-10-31 00:49:56 -07:00
Wesley W. Terpstra
a954f020a9 diplomacy: use new node style chaining 2017-10-28 11:34:16 -07:00
Wesley W. Terpstra
9f83db998e tile: don't chain too many unneeded TileLink adapters (#1075) 2017-10-27 01:12:58 -07:00
Wesley W. Terpstra
c6f95570df IntNodes: moved from tilelink to their own package 2017-10-25 16:56:51 -07:00
Christopher Celio
c4978712c9 csr: allow for superscalar decode (#1069) 
* CSR provides a decode port to check for an illegal instruction.
   * This commit now allows for multiple instructions in decode to get this
      illegal instruction information.
   * This commit leverages the existing decodeWidth parameter. This will
      potentially over-provision the number of decode ports needed for
      RVC-enabled cores.

Closes #1068
 2017-10-25 13:58:26 -07:00
Andrew Waterman
21b5367259 Expand C.UNIMP correctly (#1052) 
It was expanding to AMOADD.W, which is clearly not an illegal instruction.
 2017-10-12 14:00:14 -07:00
Henry Cook
66e4bfc2d9 rocket: TIMs should never be cached 2017-10-11 18:22:52 -07:00
Henry Cook
b64609bfe8 Merge pull request #1039 from freechipsproject/tile-crossing-params 
Improvements wrt connecting RocketTiles to SystemBus
 2017-10-11 17:12:03 -07:00
Henry Cook
1867a5b226 rocket: only cache when AcquireT is possible 2017-10-10 18:06:58 -07:00
Andrew Waterman
b2bc46471b Conditionalize some covers that are sometimes impossible (#1043) 2017-10-10 17:14:33 -07:00
Henry Cook
9026646459 coreplex: first cut at using RocketCrossingParams 2017-10-10 12:02:04 -07:00
Andrew Waterman
1474ab438d Remove extraneous signal 2017-10-09 18:33:50 -07:00
Andrew Waterman
f3825270c1 Add some covers for L1 memory system 2017-10-09 18:33:36 -07:00
Andrew Waterman
986cbfb6b1 For Rockets without VM, widen vaddrBits to paddrBits 
This supports addressing a >39-bit physical address space.
 2017-10-08 01:21:47 -07:00
Andrew Waterman
a0e5a20b60 Don't route branch comparison result through ALU output mux 
This potentially mitigates a critical path, and makes the ALU usable
in processors that have dedicated branch comparators.
 2017-10-07 17:36:24 -07:00
Wesley W. Terpstra
bd045a3b95 tilelink: split Acquire into Acquire{Block,Perm} (#1030) 
We had planned for a while to add an 'Overwrite' message which obtains
permissions without requiring retrieval of data. This is useful whenever
a master knows it will completely replace the contents of a cache block.

Instead of calling it Overwrite, we decided to split the Acquire type.

If you AcquirePerm, you MUST Release and ProbeAck with Data.
 2017-10-05 12:49:49 -07:00
Henry Cook
45581e60f0 Revert "Merge pull request #1027 from freechipsproject/dont-touch-hartid" 
This reverts commit 5232a29d7d, reversing
changes made to a2dc13669a.
 2017-10-05 00:26:44 -07:00
Andrew Waterman
7bcf28c585 Define fetchBytes in HasCoreParams, not Frontend 
It is more generally useful.
 2017-10-03 17:34:18 -07:00
Andrew Waterman
2786e42d99 Don't register interrupts in CSRFile 
They are usually registered outside the tile in a CDC.
 2017-10-03 17:34:18 -07:00
Andrew Waterman
5cfe070932 Add option to make misa read-only 2017-10-03 17:34:18 -07:00
Andrew Waterman
09468a272b Add option to remove basic counters (mcycle/minstret) 2017-10-03 17:34:18 -07:00
Andrew Waterman
ab0821f25b Move microarchitecture-neutral params from Rocket to Core 
This makes some of the units more reusable.
 2017-10-03 17:34:18 -07:00
Andrew Waterman
190d5c50d9 Remove deprecated custom-CSR support 2017-10-03 17:34:18 -07:00
Henry Cook
aa3a18222c HellaCache: users like to peep resp.data and resp.addr 2017-10-02 19:36:30 -07:00
Andrew Waterman
9137f54f59 Merge pull request #1020 from freechipsproject/fix-trace-insn 
Provide correct trace insn on interrupts when possible
 2017-09-27 18:47:24 -07:00
Andrew Waterman
9eaf50762e Don't report exceptions as valid instructions in the printed log 2017-09-27 16:29:42 -07:00
Wesley W. Terpstra
0a287df0f7 Merge remote-tracking branch 'origin/master' into auto-diplomacy-bundles 2017-09-27 16:28:10 -07:00
Andrew Waterman
31c5246446 Provide correct trace insn on interrupts when possible 2017-09-27 16:27:53 -07:00
Henry Cook
05112b49a3 Merge branch 'master' into tl-error 2017-09-27 14:50:17 -07:00
Andrew Waterman
78f3877e02 Trace tval field should be zero when not taking exceptions 2017-09-27 12:51:10 -07:00
Andrew Waterman
583adeee88 Separate interrupt bit from cause field in trace bundle 2017-09-27 12:41:30 -07:00
Wesley W. Terpstra
5323cf88dd util: add Option.unzip 2017-09-25 12:06:31 -07:00
Wesley W. Terpstra
60614055e3 diplomacy: eliminate some wasted IdentityNodes using cross-module refs 2017-09-25 12:06:27 -07:00
Wesley W. Terpstra
b9a2e4c243 diplomacy: API beautification 2017-09-22 15:01:42 -07:00
Wesley W. Terpstra
9217baf9d4 diplomacy: change API to auto-create node bundles => cross-module refs 2017-09-22 15:01:39 -07:00
Wesley W. Terpstra
dfc815f4d3 rocket: invoke LazyModule at point of use/binding 2017-09-22 14:38:47 -07:00
Henry Cook
81e136aa37 rocket: give l2 tlb a nice name 2017-09-21 18:13:39 -07:00