Andrew Waterman
a70dee17ea
Make RoCC energy-saving logic mirror same for D$
2016-06-28 12:47:45 -07:00
Andrew Waterman
6f85056494
Remove reliance on HtifKey
2016-06-23 13:18:51 -07:00
Andrew Waterman
6d43c0a945
Mask interrupts during single-step
2016-06-23 00:01:06 -07:00
Andrew Waterman
5644a2703a
Avoid need for FENCE.I in debug programs
...
This is a hack to work around caching the (uncacheable) debug RAM. The
RAM is always entered with a JALR, so flush the I$ on any debug-mode JALR.
2016-06-23 00:01:06 -07:00
Andrew Waterman
7f88a00a38
Always verify BTB result; don't bother flushing it
...
This improves CPI for things like
lbu t0, (t0)
j foo
addi t0, t0, 1
where the addi would stall, causing j's misprediction check to fail,
flushing the pipeline.
2016-06-23 00:01:06 -07:00
Howard Mao
4c31248917
make sure UseAtomics is on when PTW is being used
2016-06-22 16:09:45 -07:00
Howard Mao
d1c83ccda0
change Tile interface to allow arbitrary number of cached and uncached channels
2016-06-20 09:55:30 -07:00
Andrew Waterman
60bddddfe6
Merge sptbr and sasid
2016-06-17 18:29:05 -07:00
Andrew Waterman
0b4c8e9af7
Add D-mode single-step support
2016-06-15 16:21:24 -07:00
Colin Schmidt
e3816d5fc7
set invalidate_lr in other rocc examples ( #47 )
...
This should fix https://travis-ci.org/ucb-bar/rocket-chip/jobs/137607305
2016-06-14 16:59:37 -07:00
Andrew Waterman
e3b4b55836
Refactor breakpoints and support range comparison (currently disabled)
2016-06-10 19:55:58 -07:00
Andrew Waterman
c8c7246cce
Update breakpoint spec
2016-06-09 19:07:21 -07:00
Colin Schmidt
2c325151bf
pass invalidate_lr through simple cache interface ( #45 )
2016-06-09 17:22:36 -07:00
Andrew Waterman
586c1079d0
Fix D$ for set size > page size
2016-06-09 13:02:28 -07:00
Andrew Waterman
dca55a2b35
Respect breakpoint privilege settings
2016-06-09 12:41:52 -07:00
Andrew Waterman
c85ea7b987
Set badaddr on breakpoints
2016-06-09 12:33:43 -07:00
Andrew Waterman
4cd77cef10
Make dcsr.halt writable
2016-06-09 12:30:09 -07:00
Colin Schmidt
8516e38eb2
remove implicit modulo addressing in FPU ( #44 )
2016-06-09 11:33:33 -07:00
Andrew Waterman
e3c17b5f74
Add provisional breakpoint support
2016-06-08 20:19:52 -07:00
Andrew Waterman
4f2e2480a8
When exceptions occur in D-mode, set pc=0x808, not 0x800
...
Closes #43
2016-06-06 20:57:22 -07:00
Andrew Waterman
3b0c1ed0c3
Cope with changes to AddrMap
2016-06-03 13:50:29 -07:00
Andrew Waterman
13386af1d1
Get rid of unused implicit conversion
2016-06-01 19:30:41 -07:00
Andrew Waterman
9949347569
First stab at debug interrupts
2016-06-01 16:57:10 -07:00
Andrew Waterman
51379621d6
Flush blocking D$ on FENCE.I
2016-05-31 19:27:28 -07:00
Andrew Waterman
3ee5144923
Fix TLB tag check logic when ASIDs are present
2016-05-27 12:24:17 -07:00
Andrew Waterman
c104b57c52
Use BitPat implicit conversion in instruction decoder
2016-05-26 22:23:21 -07:00
Andrew Waterman
96fa1eb6ad
Add UInt->BitPat implicit conversion
...
This will be removed from Chisel3, so we're putting it here to maintain
compatibility.
2016-05-26 18:52:53 -07:00
Andrew Waterman
0c50bfcfb3
Work around more zero-width wire cases
2016-05-25 21:47:48 -07:00
Andrew Waterman
40f38dde63
Work around lack of zero-width wires in D$
2016-05-25 19:44:31 -07:00
Andrew Waterman
00ea9a7d82
Remove most of mstatus when user mode isn't supported
2016-05-25 15:37:32 -07:00
Andrew Waterman
5442b89664
Remove unnecessary muxes in RV32 MulDiv
2016-05-25 14:27:02 -07:00
Andrew Waterman
9aa724706e
Don't include RV64 instructions in RV32 decode table
2016-05-25 14:26:45 -07:00
Andrew Waterman
4605b616c1
Fix bug in D$ AMO/storegen logic
2016-05-24 16:26:07 -07:00
Andrew Waterman
5dac7b818d
Support set associativity in blocking D$
2016-05-24 15:45:52 -07:00
Andrew Waterman
e0addb5723
Support uncached AMOs in blocking D$
2016-05-24 15:45:35 -07:00
Andrew Waterman
f14d87e327
Support larger I$ sets when VM is disabled
2016-05-24 15:44:59 -07:00
Andrew Waterman
3b35c7470e
Add uncached support to blocking D$
2016-05-24 15:05:41 -07:00
Andrew Waterman
42f079ce57
JAL requires DW_XPR
...
This has been benign so far because of how the logic minimization worked.
2016-05-24 15:05:41 -07:00
Andrew Waterman
b92c73e361
Add LR/SC to blocking D$
2016-05-24 15:05:41 -07:00
Andrew Waterman
0d93d1a1a0
Clean up pending store logic a bit
2016-05-24 15:05:41 -07:00
Andrew Waterman
0b8de578d4
Add additional D$ store buffering to prevent structural hazards
2016-05-24 15:05:41 -07:00
Andrew Waterman
354cb2d5ec
Don't stall I$ response when resolving a branch misprediction
...
This avoids a fetch bubble.
Not clear if this is the best way to do it. Perhaps this change should
instead be made to Frontend (i.e., ignore resp.ready when req.valid is
high), but that might exacerbate a critical path.
2016-05-24 15:05:41 -07:00
Andrew Waterman
d7790ac6a4
WIP on blocking D$
2016-05-24 15:05:41 -07:00
Andrew Waterman
335e2c8a1e
Support disabling atomics extension
2016-05-24 15:05:41 -07:00
Andrew Waterman
765b90f6a4
Stall on D$ lockups less conservatively
2016-05-24 15:05:41 -07:00
Andrew Waterman
a3061047e3
Instantiate blocking D$ when NMSHRS=0
2016-05-24 15:05:41 -07:00
Andrew Waterman
80482890fd
Don't rely on tag value for nacks
2016-05-24 15:05:41 -07:00
Wesley W. Terpstra
e19c5e5d2c
IOMSHR: support atomic operations
2016-05-24 15:00:50 -07:00
Andrew Waterman
7bc38383de
add (non-working) blocking data cache
2016-05-20 18:59:05 -07:00
Howard Mao
f228309bd1
add assertion to make sure SimpleHellaCacheIF doesn't get exception
2016-05-20 16:30:27 -07:00
Andrew Waterman
4aef567a80
Fix MMIO bug: replay_next wasn't set
2016-05-13 17:59:53 -07:00
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