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
