riscv/rocket-chip
1
0
Fork 0
Code Releases Activity

tilelink: it is now legal to support Acquire for UNCACHED regions

Browse Source 
These cases exist:
  GET_EFFECTS, PUT_EFFECTS, UNCACHEABLE && !supportsAcquire: MMIO
  UNCACHED && !supportsAcquire: speculation ok and may be cached
  UNCACHED && supportsAcquire: LLC/CacheCork applied (slave never probes)
  CACHED, TRACKED && supportsAcquire: slave might probe
This commit is contained in:
Wesley W. Terpstra
2017-07-27 00:25:07 -07:00
parent 0ab5cb67b3
commit 651da73d89
2 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/main/scala/tilelink/Parameters.scala
View File

@ -38,8 +38,9 @@ case class TLManagerParameters(
require (supportsAcquireB.contains(supportsAcquireT))
// Make sure that the regionType agrees with the capabilities
require ((regionType == RegionType.CACHED || regionType == RegionType.TRACKED) != supportsAcquireB.none)
require (regionType != RegionType.UNCACHED || supportsGet)
require (!supportsAcquireB || regionType >= RegionType.UNCACHED) // acquire -> uncached, tracked, cached
require (regionType <= RegionType.UNCACHED || supportsAcquireB) // tracked, cached -> acquire
require (regionType != RegionType.UNCACHED || supportsGet) // uncached -> supportsGet
val name = nodePath.lastOption.map(_.lazyModule.name).getOrElse("disconnected")
val maxTransfer = List( // Largest supported transfer of all types