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Author SHA1 Message Date
Andrew Waterman
0190724492 Actually use the C-channel acquire-before-release queue 
oops...
 2017-08-13 13:03:35 -07:00
Andrew Waterman
41a2a03f90 Merge pull request #953 from freechipsproject/fix-dcache-ecc 
Don't trigger ECC writebacks when a release is in flight
 2017-08-12 16:47:19 -07:00
Andrew Waterman
7387f2a93a Don't block D-channel when handling a probe 
This is an acquire-before-release regression.
 2017-08-12 16:13:24 -07:00
Andrew Waterman
604abd5b07 Only report ECC errors when the RAM was actually read 2017-08-12 15:28:03 -07:00
Andrew Waterman
18fb052fc9 DRY 2017-08-12 15:27:30 -07:00
Andrew Waterman
176110b6d3 Don't trigger ECC writebacks when a release is in flight 2017-08-12 15:23:57 -07:00
Wesley W. Terpstra
f191bb994c PatternPusher: can now expect a certain output (#952) 2017-08-11 18:10:27 -07:00
Wesley W. Terpstra
baf769f924 tilelink: add PatternPusher, a device to inject a fixed traffic pattern (#950) 2017-08-11 15:07:10 -07:00
Andrew Waterman
a3358f34a0 Fix priority inversion for two back-to-back divides (#948) 
If the first one is killed for some unrelated reason (e.g. write port
hazard), the second one will still issue to the div-sqrt unit.  While
it will itself later be killed, the fact that the later instruction
acquires a resource needed by the former instruction leads to deadlock.
 2017-08-10 17:12:09 -07:00
Wesley W. Terpstra
fa867bc478 plusarg_reader: make synthesis path a no brainer (#947) 2017-08-10 16:35:30 -07:00
Andrew Waterman
0a591c5b5b Roll back use of UIntToOH1 (#946) 
These appear to be equivalent, but the old one seems to fail in Vivado and
this one seems to pass.  This is not yet conclusive.
 2017-08-09 18:39:47 -07:00
Yunsup Lee
0b8b136831 Merge pull request #943 from freechipsproject/fix-ibuf 
Fix IBuf bug
 2017-08-09 10:38:35 -07:00
Andrew Waterman
721770244e Fix IBuf bug 
Don't examine a packet's xcpt signal if it might be invalid.  In this case,
the correct fix is to not examine xcpt at all; the deleted code was vestigial.
(Note, the other use of xcpt(j+1) in this code is indeed safe.)
 2017-08-09 09:47:51 -07:00
Yunsup Lee
fb2c22ca80 Merge pull request #944 from freechipsproject/fix-vlsi-mem-gen 
memgen: also randomize ren and rand register
 2017-08-08 23:18:08 -07:00
Andrew Waterman
31b75987ca Avoid width warning 2017-08-08 20:57:31 -07:00
Yunsup Lee
8705b0e070 memgen: also randomize ren and rand register 2017-08-08 20:41:53 -07:00
Richard Xia
97ad528a32 Merge pull request #941 from freechipsproject/bump-riscv-tools 
Bump riscv-tools to bump riscv-tests for mi-csr test fix.
 2017-08-08 18:50:29 -07:00
Wesley W. Terpstra
49ba31ac34 Merge pull request #942 from freechipsproject/bus-blocker-lock 
Bus blocker lock
 2017-08-08 18:03:36 -07:00
Wesley W. Terpstra
a9b1410f01 BusBlocker: parameterize page granularity 2017-08-08 17:10:01 -07:00
Wesley W. Terpstra
010ba94474 BusBlocker: rename a variable 2017-08-08 17:00:22 -07:00
Wesley W. Terpstra
6d6fc38787 BusBlocker: lock bit should affect the prior PMP address, not next 2017-08-08 17:00:12 -07:00
Richard Xia
dd5934b6dc Bump riscv-tools to bump riscv-tests for mi-csr test fix and pull in stable binutils. 2017-08-08 16:29:26 -07:00
Yunsup Lee
0a351f677d Merge pull request #940 from freechipsproject/fix-ecc-way 
Don't merge stores that manifest WAW hazards
 2017-08-08 16:05:21 -07:00
Yunsup Lee
8cc41ab46b Merge pull request #936 from freechipsproject/vlsi-mem-gen 
Improve and use vlsi_mem_gen for verilator flow
 2017-08-08 16:04:53 -07:00
Andrew Waterman
809c7e8551 Don't merge stores that manifest WAW hazards 
The following sequence would drop the first store when eccBytes=4:

    sb x0, 0(t0)
    nop
    sb x0, 4(t0)
    nop
    sb x0, 1(t0)

Because the first and second store are to different ECC granules, the
hazard check correctly allowed the second one to proceed, but the third
was merged with the second, even though it conflicted with the first.
So, don't allow the third to be merged with the second, since the second
stored to a different ECC granule.
 2017-08-08 15:19:05 -07:00
Wesley W. Terpstra
3ef6e4c9f2 Merge pull request #939 from freechipsproject/bus-blocker 
tilelink: PMP controlled BusBlocker prevents bus accesses
 2017-08-08 15:06:55 -07:00
Andrew Waterman
82e13443b2 Merge pull request #937 from freechipsproject/critical-paths 
Perform tag error detectoin/correction in same cycle as RAM
 2017-08-08 15:03:28 -07:00
Andrew Waterman
dd103ae7ec Merge pull request #938 from freechipsproject/dtim-ignore-cacheable 
Don't report to the DTIM that data is cacheable
 2017-08-08 15:00:13 -07:00
Wesley W. Terpstra
8f261adc6b BusBlocker: change default policy to deny 2017-08-08 14:19:59 -07:00
Wesley W. Terpstra
0d76e96b88 tilelink: PMP controlled BusBlocker prevents bus accesses 2017-08-08 13:28:01 -07:00
Andrew Waterman
7935c61c19 Don't report to the DTIM that data is cacheable 
Otherwise, it will attempt to perform AMOs where they're unsupported!
 2017-08-08 11:55:04 -07:00
Andrew Waterman
74d309c18e Make I vs. D a static property of TLB, not an input pin 
The microarchitecture doesn't really support unified TLBs, so don't fake it.
 2017-08-08 11:54:47 -07:00
Andrew Waterman
e92981b0bd DRY 2017-08-08 11:46:38 -07:00
Andrew Waterman
62ccba304c Perform tag error detectoin/correction in same cycle as RAM 
The tag RAMs tend to be fast, so take up some of the slack.
This makes s2_nack faster.
 2017-08-08 10:21:30 -07:00
Palmer Dabbelt
6d1d285464 Merge pull request #933 from freechipsproject/cinst 
Print out the compressed instruction when executing one
 2017-08-07 21:40:10 -07:00
Andrew Waterman
ea4b1bc349 Use vlsi_mem_gen for verilator flow 2017-08-07 20:36:22 -07:00
Andrew Waterman
b0f32c8f09 Randomize disabled read ports in vlsi_mem_gen 2017-08-07 20:35:40 -07:00
Palmer Dabbelt
cc1e2af336 Merge pull request #934 from freechipsproject/critical-paths 
Revert "Remove one gate from D$ ECC check"
 2017-08-07 19:41:08 -07:00
Henry Cook
c8f8806df0 Merge pull request #932 from freechipsproject/tl-bus-delayer 
tilelink: allow insertion of TLDelayer on TLBus outward node
 2017-08-07 19:01:39 -07:00
Henry Cook
c4092dd0cc tilelink: improve entropy of bus delayer 2017-08-07 17:36:07 -07:00
Andrew Waterman
402907990c Revert "Remove one gate from D$ ECC check" 
This reverts commit 7d94074b05, which
works fine with optimistic behavioral RAMs but not real ones.
 2017-08-07 17:33:20 -07:00
Henry Cook
2910d6fa2a tilelink: make bus xbar protected so it can be suggestNamed 2017-08-07 17:30:24 -07:00
Palmer Dabbelt
fc0d5fcf98 Print out the compressed instruction when executing one 2017-08-07 17:21:53 -07:00
Wesley W. Terpstra
e27072e063 Merge pull request #931 from freechipsproject/fix-ram-model-source-reuse 
Fix ram model source reuse
 2017-08-07 16:56:13 -07:00
Henry Cook
c457c9cb9f tilelink: allow insertion of TLDelayer on TLBus outward node 2017-08-07 16:43:06 -07:00
Wesley W. Terpstra
d5a135914b Revert "Disable AMBAUnitTestConfig, as it is blocking unrelated PRs" 
This reverts commit 39b7e930ca.

Now that the RAMModel can properly tolerate overlapping responses
in the face of source reuse, we can re-enable the regression test.
 2017-08-07 16:04:02 -07:00
Yunsup Lee
03002b3106 Merge pull request #930 from freechipsproject/fix-maskrom 
maskrom: retain data for d channel is not ready
 2017-08-07 16:01:38 -07:00
Wesley W. Terpstra
f8b45564d1 tilelink: RAMModel must support source reuse 
If a multibeat response comes back, the source might be reused.
If response reordering has made the multibeat response invalid,
we need to remember this even if the valid bit is cleared on reuse.
 2017-08-07 16:01:15 -07:00
Yunsup Lee
558fc7f293 maskrom: retain data for d channel is not ready 2017-08-07 12:17:10 -07:00
Yunsup Lee
aff028f8f0 Merge pull request #926 from freechipsproject/bump-tools 
bump riscv-tools
 2017-08-06 23:04:55 -07:00