riscv/rocket-chip
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742c05d6a7
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1053 Commits

Author SHA1 Message Date
Andrew Waterman
742c05d6a7 Pipeline D$->I$ control paths 
These stretch the miss latency by a cycle in exchange for slack.
The current implementation also adds a cycle to mul/div latency,
which can be worked around for more hardware (possibly gated by
the FastMulDiv option).
 2016-05-13 17:07:28 -07:00
Colin Schmidt
8fa2de0816 chisel3 fix to RoCC connections honor last connect 2016-05-05 18:09:48 -07:00
Andrew Waterman
9dd23a603a Remove HTIF port 2016-05-03 13:41:58 -07:00
Andrew Waterman
5352497edb MPRV takes effect regardless of privilege mode 2016-05-02 19:53:25 -07:00
Howard Mao
5cbcc41515 get rid of unused imports 2016-05-02 18:23:46 -07:00
Andrew Waterman
f784f4da93 Rename PRCICoreIO to PRCITileIO 2016-05-02 18:08:01 -07:00
Andrew Waterman
000e20f937 Remove MIPI; make mip.MSIP read-only 
The PRCI block outside the core will provide IPIs eventually
 2016-05-02 15:18:41 -07:00
Andrew Waterman
83fa489cef Stop using HTIF CSR port 
The port itself is still present to keep other stuff compiling.
 2016-05-02 14:40:52 -07:00
Albert Ou
0ff4fd0ccd Fix IOMSHR to send finishes for stores 2016-04-30 22:20:29 -07:00
Andrew Waterman
491184a8f8 ERET -> xRET; remove mcfgaddr 2016-04-30 17:32:51 -07:00
Andrew Waterman
5af98145b9 don't signal bad physical address on TLB miss 2016-04-30 17:31:46 -07:00
Andrew Waterman
cae4265f3b Change mcfgaddr pointer 2016-04-28 16:14:05 -07:00
Andrew Waterman
739cf07637 Remove mtime/mtimecmp 
The RTC is now a device that lives on the MMIO bus.
 2016-04-27 14:54:51 -07:00
Andrew Waterman
fb5c38c186 Handle invalidate_lr in cache arbiter, not tile 2016-04-27 11:22:04 -07:00
Andrew Waterman
b99db83e67 Avoid needless Vec generation 2016-04-27 00:28:39 -07:00
Andrew Waterman
8acec8eb36 Remove dead code from BTB 2016-04-27 00:28:12 -07:00
Andrew Waterman
fe8c91f620 Fix IOMSHR state machine bug 
Sending the finish too early causes the CPU response to get dropped.

attn @zhemao
 2016-04-26 15:32:25 -07:00
Andrew Waterman
5fd5b58743 Remove stats CSR 2016-04-26 15:31:32 -07:00
Andrew Waterman
d93677a343 Support larger cache sets when not using VM 2016-04-26 15:31:32 -07:00
Yunsup Lee
5dbf9640e2 Use TLB flush signal to I$ explicitly 2016-04-22 15:41:31 -07:00
Andrew Waterman
84fd45fd77 Pass TLB flush signal to I$ explicitly 2016-04-22 15:20:17 -07:00
Howard Mao
b7527268bb use address map instead of MMIOBase to find size of memory 2016-04-21 18:44:39 -07:00
Christopher Celio
2d6f35525e Added Field[Int] to SFMALatency/DFMALatency params 2016-04-06 14:50:57 -07:00
Andrew Waterman
51e0870e23 Separate I$ and D$ interface signals that span clock cycles 
For example, Decopuled[HellaCacheReq].bits.kill doesn't make sense,
since it doesn't come the same cycle as ready/valid.
 2016-04-01 19:30:39 -07:00
Andrew Waterman
dc662f28a0 Specify width on s1_pc to avoid width inference problem 2016-04-01 17:28:42 -07:00
Andrew Waterman
72f7f71eb5 No need to allow finishes to be sent in s_refill_resp state 
This is a hold-over from when writebacks needed finish messages.
 2016-04-01 16:19:57 -07:00
Henry Cook
78bc18736e LRSC startvation fix: HellaCache generates its own Finish messages again. 2016-04-01 16:04:25 -07:00
Andrew Waterman
37b9051762 No need to validate npc if BTB is disabled 2016-04-01 15:54:57 -07:00
Andrew Waterman
4480d1e817 Don't compile BTB when nEntries=0 2016-04-01 15:14:45 -07:00
Andrew Waterman
d406dc1231 Remove vestigial BTB enable option 2016-04-01 15:14:34 -07:00
Henry Cook
54dd82ff76 bugfix for WB data buffer 2016-03-31 17:53:49 -07:00
Christopher Celio
1792d01ce1 fix leaky assert in nbdcache 
Squash of #33.
 2016-03-31 15:56:14 -07:00
Andrew Waterman
adb7eacf6e Fix Chisel3 build for XLen=32 2016-03-30 22:48:51 -07:00
Andrew Waterman
70664bbca0 Fix Chisel3 build for UseVM=false 2016-03-30 22:48:31 -07:00
Andrew Waterman
8ad8e8a691 Add partial Sv48/Sv57 support 
Right now, we don't support Sv39 and Sv48 at the same time, which needs
to change.
 2016-03-30 11:02:22 -07:00
Andrew Waterman
e652821962 Use correct kind of TileLink arbiter 
It was "correct" before, but broke Chisel3 build.
 2016-03-28 22:53:47 -07:00
Andrew Waterman
5ce3527b88 Merge pull request #32 from ucb-bar/pr-btb-masking 
separate btb response mask from the frontend mask
 2016-03-26 18:15:14 -07:00
Christopher Celio
f526d380fd separate btb response mask from the frontend mask 
It is now the job of the pipeline to monitor the frontend's valid mask (of
instructions) and the BTB's suggested valid mask (based on the prediction it
makes). Some processors may want to ignore or override the BTB's prediction and
thus can supply their own instruction mask.
 2016-03-26 05:37:26 -07:00
Andrew Waterman
ed280fb3de Remove empty when statement (???) 2016-03-25 15:52:18 -07:00
Andrew Waterman
1ae6d09751 Slightly ameliorate D$->I$ critical path via scoreboard 2016-03-25 15:29:32 -07:00
Andrew Waterman
a4685a073f Don't instantiate PTW when UseVM=false 2016-03-25 14:17:25 -07:00
Andrew Waterman
27b3cca046 Discover D$, PTW port counts dynamically 
This is a generator, after all...
 2016-03-25 14:16:56 -07:00
Andrew Waterman
8d1ba4d1ec Remove hard-coded XLEN values from D$ 2016-03-24 14:52:12 -07:00
Andrew Waterman
7ae44d4905 Add RV32 support 2016-03-10 17:32:00 -08:00
Andrew Waterman
82c595d11a Fix no-FPU elaboration of CSR file 2016-03-10 17:30:56 -08:00
Andrew Waterman
bc15e8649e WIP on priv spec v1.9 2016-03-02 23:29:58 -08:00
Yunsup Lee
15ac4d317f RoCC PTW refactoring 2016-02-25 17:15:38 -08:00
Christopher Celio
b96343a4e5 [btb] fix mix type error for fetch-width > 1 
closes #24
 2016-02-08 17:41:38 -08:00
Christopher Celio
31dd311aff [fpu] fix rounding mode bug in fdivfsqrt 2016-02-08 17:38:31 -08:00
Howard Mao
5abfd1a4ab make sure to check for region violations in DMA frontend 2016-02-03 15:40:44 -08:00