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Commit Graph

66 Commits

Author SHA1 Message Date
Wesley W. Terpstra
0f5065fbf3 tilelink: WidthWidget rewrite beat merging
- errors are properly OR reduced
- registers latched only as needed (was previously a shift register)
- combines beats without inspecting address (removes addr_lo dependency)
2017-07-26 10:24:12 -07:00
Wesley W. Terpstra
f0ffb7e31e tilelink: initialize toggle in Fragmenter (#894)
No strictly necessary, because the initial value does not matter, but good hygiene since it drives a cycle of logic.
2017-07-26 10:21:31 -07:00
Wesley W. Terpstra
c2b8b08461 tilelink: fix Fragmenter source re-use bug (#888)
Consider the following waveform for two 4-beat bursts:
---A----A------------
-------D-----DDD-DDDD
Under TL rules, the second A can use the same source as the first A,
because the source is released for reuse on the first response beat.

However, if we fragment the requests, it looks like this:
---3210-3210---------
-------3-----210-3210
... now we've broken the rules because 210 are twice inflight.

To solve this, we alternate an a.source bit every time D completes a txn.
2017-07-25 16:23:55 -07:00
Wesley W. Terpstra
68ed055f6d chiplink: adjust bus view to include the splitter (#886) 2017-07-24 21:41:17 -07:00
Henry Cook
01ca3efc2b Combine Coreplex and System Module Hierarchies (#875)
* coreplex collapse: peripherals now in coreplex

* coreplex: better factoring of TLBusWrapper attachement points

* diplomacy: allow monitorless :*= and :=*

* rocket: don't connect monitors to tile tim slave ports

* rename chip package to system

* coreplex: only sbus has a splitter

* TLFragmenter: Continuing my spot battles on requires without explanatory strings

* pbus: toFixedWidthSingleBeatSlave

* tilelink: more verbose requires

* use the new system package for regression

* sbus: add more explicit FIFO attachment points

* delete leftover top-level utils

* cleanup ResetVector and RTC
2017-07-23 08:31:04 -07:00
Megan Wachs
f2002839eb TLFragmenter: Continuing my spot battles on requires without explanatory strings (#882) 2017-07-21 21:55:32 -07:00
Yunsup Lee
21954c1c73 tileink: FIFOFixer should cope with zero-latency devices 2017-07-19 19:38:27 -07:00
Wesley W. Terpstra
416629b3bf tilelink: FIFOFixer should fix no domain => domain cases (#873) 2017-07-17 22:32:17 -07:00
Wesley W. Terpstra
fc75ada577 tilelink: Monitor should report line numbers of connection that failed (#872) 2017-07-17 21:29:14 -07:00
Howard Mao
ec57994784 fix the TLFuzzer IO (#869) 2017-07-17 14:59:35 -07:00
Wesley W. Terpstra
16e8709144 tilelink: it is now legal to have errors on {Release,Hint}Ack (#864) 2017-07-14 16:13:30 -07:00
Wesley W. Terpstra
b7f1ba3428 tilelink: FIFOFixer must support null cases (#860)
In particular, it is ok if no slaves actually need FIFO fixing.
It is also ok if none of those fixed are FIFO.
2017-07-12 22:20:31 -07:00
Wesley W. Terpstra
09b9d33a9a tilelink: FIFOFixer now has a policy parameter 2017-07-12 17:38:55 -07:00
Wesley W. Terpstra
702143eb33 tilelink: SRAM can emulate incompletely populated memory 2017-07-07 21:40:40 -07:00
Wesley W. Terpstra
e8cb6dafd3 tilelink: SRAM reports errors on illegal access 2017-07-07 21:15:36 -07:00
Henry Cook
4c595d175c Refactor package hierarchy and remove legacy bus protocol implementations (#845)
* Refactors package hierarchy.

Additionally:
  - Removes legacy ground tests and configs
  - Removes legacy bus protocol implementations
  - Removes NTiles
  - Adds devices package
  - Adds more functions to util package
2017-07-07 10:48:16 -07:00