riscv/rocket-chip
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Author SHA1 Message Date
Andrew Waterman
431dd2219b Another Bits -> BitPat 2015-07-28 20:13:56 -07:00
Andrew Waterman
049fc8dc24 Chisel3 compatibility: use BitPat for don't-cares 
This one's hella ugly, but for the time being, idgaf.
 2015-07-28 02:48:49 -07:00
Andrew Waterman
f2dcc40e67 Chisel3 compatibility changes 2015-07-27 12:42:20 -07:00
Andrew Waterman
ae73e3a997 Only instantiate div/sqrt unit if requested 2015-07-22 22:18:18 -07:00
Andrew Waterman
e9433ee01e Minor cleanup 2015-07-22 17:38:08 -07:00
Andrew Waterman
b4e4ceed3d Factor out some more hazard detection code 2015-07-22 15:52:13 -07:00
Andrew Waterman
bd785e7d19 Factor out common hazard detection code 2015-07-22 15:46:20 -07:00
Andrew Waterman
cc447c8110 Refactor pipeline RTL (merge ctrl + dpath into rocket) 2015-07-21 17:10:56 -07:00
Andrew Waterman
ac6e73e317 Add Wire() wrap 2015-07-15 20:24:18 -07:00
Andrew Waterman
5b7f3c3006 Don't use clone 2015-07-15 17:30:50 -07:00
Andrew Waterman
be2ff6dec7 Vec(Reg) -> Reg(Vec) 2015-07-15 12:33:46 -07:00
Andrew Waterman
a78e28523c Chisel3: Don't mix Mux types 2015-07-11 14:06:08 -07:00
Andrew Waterman
3233867390 Use Chisel3 SeqMem construct 2015-07-11 13:34:57 -07:00
Henry Cook
5ed2899e56 Merge pull request #10 from wsong83/fix 
L1 D$ writeback unit, reduce re-read data array
 2015-07-06 15:18:49 -07:00
Andrew Waterman
5362e2bbbd New machine-mode timer facility 2015-07-05 16:38:49 -07:00
Andrew Waterman
5e009ecc75 Fix an apparently benign PC sign-extension bug 2015-06-11 16:08:39 -07:00
Wei Song
4db60d9e9d code clean in dcache, no need to check the condition twice. 2015-06-02 22:06:12 +01:00
Wei Song
b6e68773fd nbdcache, writeback unit: when release is not ready and data is not ready for a beat too, no need to re-read data array. 2015-05-30 16:25:27 +01:00
Andrew Waterman
6a9390c50e Avoid spurious D$ assertion failures 
For the Rocket pipeline, this fix is needless and the problem is that the
assertion is too conservative, but I solved it this way to avoid problems
for other plausible use cases where physical and virtual accesses are
intermixed.
 2015-05-19 03:00:53 -07:00
Andrew Waterman
f460cb6c54 Update to privileged architecture 1.7 2015-05-19 02:32:21 -07:00
Andrew Waterman
254498042a Fix Split for 0-width wires 2015-05-18 18:23:17 -07:00
Andrew Waterman
d31b26c342 Clean up handling of icache's io.cpu.npc signal 2015-05-18 18:22:48 -07:00
Christopher Celio
b09832f1b5 ICache now returns the "next PC" signal. 
useful for other modules that need access to the fetch PC on the
   cycle it is sent to the SRAM.
 2015-05-07 04:53:05 -07:00
Henry Cook
a315fe93c1 simplify ClientMetadata.makeRelease 2015-04-20 10:46:24 -07:00
Henry Cook
3048f4785a HeaderlessTileLinkIO -> ClientTileLinkIO 2015-04-17 16:56:53 -07:00
Henry Cook
49f1c0aa7b moved ecc lib to uncore 2015-04-13 15:58:10 -07:00
Henry Cook
91e882e3f8 Use HeaderlessTileLinkIO 2015-04-13 15:58:10 -07:00
Andrew Waterman
24bb032ede Merge pull request #7 from ccelio/master 
Rocket front-end can now fetch 4 instructions; added assert to dcache; refactoring
 2015-04-12 19:18:23 -07:00
Christopher Celio
517d0d4b89 feedback on PR 2015-04-12 18:44:03 -07:00
Christopher Celio
4d6ebded02 Added assert to nbdcache 2015-04-11 02:58:34 -07:00
Christopher Celio
a564f08702 Rename dmem.sret signal to more accurate invalidate_lr 2015-04-11 02:26:33 -07:00
Christopher Celio
8fc2d38ca9 Removed unnecessary signal in CSRIO 2015-04-11 02:20:34 -07:00
Christopher Celio
2f88c5ca9d Renamed PCR to CSR 2015-04-11 02:16:44 -07:00
Christopher Celio
11dbd4221a Fixed front-end to support four-wide fetch. 2015-04-10 17:53:47 -07:00
Andrew Waterman
9ade0e41cc Integrate divide/sqrt unit 2015-04-04 16:39:17 -07:00
Andrew Waterman
fe27b9b1b2 Support writing sstatus.fs even without an FPU 2015-04-04 15:20:18 -07:00
Andrew Waterman
bce62d5774 Update PTE format to reflect reserved bits 2015-04-04 15:19:15 -07:00
Andrew Waterman
d912ea265e New virtual memory implementation (Sv39) 2015-03-27 16:20:59 -07:00
Andrew Waterman
faada5f110 Mask off LSBs of sepc/mepc/stvec 
Therefore, they cannot generate misaligned instruction exceptions.
When a misaligned instruction exception does occur, mbadaddr
retains the misaligned PC bits, so no information is actually lost.
 2015-03-25 00:20:58 -07:00
Andrew Waterman
543ac91cf2 Misaligned fetches can't happen at the I$ anymore 
They are caught before the I$ ever sees them, so leverage that fact.
 2015-03-24 23:55:43 -07:00
Andrew Waterman
90b31586ff Misc. CSR fixes/improvements 
- Support RV32 mstatus register
- Don't ignore mstatus.stie bit
- Support custom M-mode R/W CSRs for Raven chip
 2015-03-24 23:50:18 -07:00
Andrew Waterman
822698b567 support disabling supervisor mode (via UseVM parameter) 2015-03-24 19:32:45 -07:00
Andrew Waterman
0332c1e7fe Reduce latency of page table walks 
A small cache in the PTW caches non-leaf PTEs, reducing latency and D$ misses.
 2015-03-24 18:58:38 -07:00
Andrew Waterman
31d17cbf86 Hard-wire LSB of JALR to 0, as sent to BTB 2015-03-21 00:16:34 -07:00
Yunsup Lee
53617d6df5 fix long-standing dcache bug 
have to initialize register, if it is used the same cycle it is begin written
 2015-03-17 21:45:17 -07:00
Yunsup Lee
5b4653b621 fix rocc exception/s bit 2015-03-17 05:08:23 -07:00
Andrew Waterman
66388be1ce Merge [shm]call into ecall, [shm]ret into eret 2015-03-17 02:24:41 -07:00
Andrew Waterman
2c875555a2 Separate exception return control from exception control 2015-03-17 00:14:32 -07:00
Andrew Waterman
e85c54cc4b New privileged ISA implementation 2015-03-14 02:49:07 -07:00
Yunsup Lee
ebbd14254c uncached port should be a HeaderlessUncachedTileLinkIO type 2015-03-13 02:12:23 -07:00