riscv/rocket-chip
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1145 Commits

Author SHA1 Message Date
Howard Mao
d34e790ac0 get rid of duplicated code in rocket Util 2016-08-18 18:40:07 -07:00
Andrew Waterman
5164f947c0 Validate mstatus.mpp/dcsr.prv values on MRET/DRET 
The registers can still hold invalid values, but an attempt to switch
to the mode stored therein will instead go to an implemented mode.
 2016-08-17 15:39:34 -07:00
Andrew Waterman
ed827678ac Write test harness in Chisel 
This is an unavoidably invasive commit, because it affects the unit tests
(which formerly exited using stop()), the test harness Verilog generator
(since it is no longer necessary), and the DRAM model (since it is no
longer connected).  However, this should substantially reduce the effort
of building test harnesses in the future, since manual or semi-automatic
Verilog writing should no longer be necessary.  Furthermore, there is now
very little duplication of effort between the Verilator and VCS test
harnesses.

This commit removes support for DRAMsim, which is a bit of an unfortunate
consequence.  The main blocker is the lack of Verilog parameterization for
BlackBox.  It would be straightforward to revive DRAMsim once support for
that feature is added to Chisel and FIRRTL.  But that might not even be
necessary, as we move towards synthesizable DRAM models and FAME-1
transformations.
 2016-08-15 23:27:27 -07:00
Andrew Waterman
2d1d7266f5 Fix RV64 badaddr value on instruction faults with large addresses 
We were relying on ALU passthrough for this, but failed to override the
ALU dw argument, so bits above 31 could be discarded.
 2016-08-15 23:09:09 -07:00
Howard Mao
38e0967816 strip DMA and RoCC CSRs out of rocket and uncore (#201) 2016-08-15 23:08:55 -07:00
Howard Mao
2645f74af2 clean up addrmap flatten function 2016-08-09 22:14:32 -07:00
Andrew Waterman
1b8f919db2 Remove unused CoreName parameter 2016-08-09 15:24:59 -07:00
Andrew Waterman
458520c8f6 Use a generic UInt for TileLink op sizes, rather than MT_xx enum 2016-08-09 15:24:51 -07:00
Andrew Waterman
a857b08c59 [rocket] compute D$ tag bits based upon # of arbiter ports 2016-08-09 14:40:48 -07:00
Howard Mao
9c4e57aea5 example Rocc accelerator fixes 2016-08-04 11:17:13 -07:00
Andrew Waterman
cc0f8962fb [rocket] take physical memory attribute check off critical path 
Cache the attributes in the TLB instead.
 2016-08-02 17:21:03 -07:00
Andrew Waterman
76f33d88a6 [rocket] Respect physical memory protection during page table walks 2016-08-02 17:20:49 -07:00
Andrew Waterman
5d4f6383f2 [rocket] Automatically kill D$ access on address exceptions 
Doing this internally to the cache eliminates a long control path
from the cache to the core and back to the cache.
 2016-08-02 17:20:49 -07:00
Andrew Waterman
b54db0ba23 [rocket] don't update BTB on not-taken branches 
Only update the BHT; don't set the target prediction to pc+4.
 2016-08-02 17:20:49 -07:00
Andrew Waterman
64bde1060c [rocket] remove unused code in ibuf 2016-08-02 15:26:09 -07:00
Andrew Waterman
2ce702dc0a [rocket] fix PTW critical path 
Pipeline the killing of a D$ request following a PTW cache hit.
 2016-08-02 15:19:48 -07:00
Andrew Waterman
7e9d139e49 [rocket] remove rocket-specific require() from HasCoreParameters 2016-08-02 15:19:48 -07:00
Andrew Waterman
832e56d3c7 Fix toBits/toUInt/toSInt deprecation warnings 2016-07-31 17:13:52 -07:00
Andrew Waterman
a6e009d8de [rocket] Fix frontend mask when fetchWidth == 1 2016-07-31 15:21:17 -07:00
Andrew Waterman
c49dad2e9d Improve PTW QoR 2016-07-29 17:56:42 -07:00
Andrew Waterman
058396aefe [rocket] Implement RVC 2016-07-29 17:56:42 -07:00
Andrew Waterman
c465120610 [rocket] use more standard pattern for computing integer min 2016-07-29 17:56:42 -07:00
Andrew Waterman
ffac86b041 [rocket] only write badaddr on certain exceptions 2016-07-29 17:56:42 -07:00
Andrew Waterman
0d3d9fca25 [rocket] Allow zapping of BTB entries 
This is necessary to guarantee forward progress with RVC, since if the
BTB keeps mispredicting, the processor might never successfully
fetch both halves of a misaligned instruction.
 2016-07-29 17:56:42 -07:00
Andrew Waterman
8e0392f24b [rocket] don't hard-code instruction width in BHT 2016-07-29 17:56:42 -07:00
Andrew Waterman
8a7fc75b53 fix metadata race in blocking L1 DCache 2016-07-28 17:54:28 -07:00
Howard Mao
bf35f980a6 make sure PTE cache is power of 2 in size to satisfy PseudoLRU requirement 2016-07-27 18:40:38 -07:00
Howard Mao
dcfcac9530 fix LRSC issue (RocketChip issue #86) 
It was possible that the result of a store-conditional could get lost if it
did not depend on the result of the corresponding load-reserved.

This was because the MSHR does not update the client state based on the
secondary requests. So the LR would acquire the line in clientExcusiveClean,
but then we would fail to update the metadata array to change the state
to clientExclusiveDirty.

The solution is to track whether a secondary acquire would cause the
line to be dirty. If so, use M_XWR instead of the primary command to
generate the update coherence state.
 2016-07-26 18:41:52 -07:00
Howard Mao
51edd19e85 add U bit to misa register 2016-07-22 14:22:59 -07:00
Colin Schmidt
a43ad522dc add clock override to tile constructor (#42) 
useful to have upstream so that tape-outs can construct
rocket-chip to have cores on different clocks without
forking rocket
 2016-07-21 17:56:52 -07:00
Ben Keller
c069e66056 Modify the RoCC interface to include status in the command queue. (#41) 
This addresses a bug in which changes in mstatus could
propagate to RoCCs before their time. Existing RoCCs that use
the status port will need to be modified to match this change.

This addresses the first half of #40.
 2016-07-18 17:40:50 -07:00
Howard Mao
2723b2f515 fix issues in SimpleHellaCacheIF and document the changes 2016-07-18 17:02:47 -07:00
Howard Mao
40a146f625 HellaCacheArbiter passes through if n == 1 2016-07-18 17:01:29 -07:00
mwachs5
cff8de9814 Use new Mul/Div parameters vs UseFastMulDiv (#48) 
* Use new Mul/Div parameters vs UseFastMulDiv

* Rename MulDivUnroll to MulUnroll
 2016-07-15 15:41:20 -07:00
Andrew Waterman
7cf44f9b25 clean up WideCounter implementation 2016-07-15 00:51:01 -07:00
Andrew Waterman
d78f1aacd0 Clean up some zero-width wire cases using UInt.extract 2016-07-14 22:08:01 -07:00
Andrew Waterman
da512d4230 Explicitly discard BTB index LSBs 2016-07-14 17:10:27 -07:00
Andrew Waterman
e6aab368a4 Replace ICacheBufferWays parameter with I$ constructor argument 2016-07-14 12:38:54 -07:00
Andrew Waterman
3d0b92afd7 Misc code cleanup 2016-07-14 12:09:34 -07:00
Andrew Waterman
b8884e8143 Simplify frontend virtual address extension code 2016-07-14 12:05:09 -07:00
Andrew Waterman
1699622730 Don't speculatively refill I$ in uncacheable regions 2016-07-09 01:10:58 -07:00
Howard Mao
f7b392306e make sure SimpleHellaCacheIF can work with blocking DCache 2016-07-07 18:59:23 -07:00
Andrew Waterman
3d8939d3c3 Set misa.base = 1 for RV32 2016-07-07 15:32:21 -07:00
Andrew Waterman
2455a806af Make WFI instruction respect mie CSR setting 2016-07-07 15:31:17 -07:00
Andrew Waterman
35a983275e Guarantee one-hotness of BTB entries 2016-07-06 15:58:01 -07:00
Andrew Waterman
c0e6ecebfc Fix BTB perf bug 
In rare cases, it would replace into a different row than it recorded.
 2016-07-06 03:16:05 -07:00
Andrew Waterman
f3e22984d5 Remove uarch counters 
These will be replaced with the indirect TDR scheme used by breakpoints.
 2016-07-06 01:41:41 -07:00
Andrew Waterman
25fdabdd59 Don't implicitly create Vecs, since they're heavyweight 2016-07-06 01:41:31 -07:00
Andrew Waterman
8bd7e3932b Implement priv-1.9 PTE scheme 2016-07-05 19:19:49 -07:00
Andrew Waterman
ebefe57036 simplify BTB fetchWidth=1 special case 2016-07-04 23:43:47 -07:00