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rocket-chip
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Work around zero-width wire limitations

This commit is contained in:
Andrew Waterman 2016-05-26 00:48:46 -07:00
parent 213bb26367
commit ddfa30e215
1 changed files with 6 additions and 3 deletions
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9
groundtest/src/main/scala/generator.scala
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@ -85,7 +85,7 @@ class UncachedTileLinkGenerator(id: Int)
val word_data = Wire(UInt(width = genWordBits))
word_data := Cat(data_prefix, full_addr)
val beat_data = Fill(tlDataBits / genWordBits, word_data)
val wshift = Cat(full_addr(tlByteAddrBits - 1, wordOffset), UInt(0, wordOffset))
val wshift = Cat(beatOffset(full_addr), UInt(0, wordOffset))
val wmask = Fill(genWordBits / 8, Bits(1, 1)) << wshift
val put_acquire = Put(
@ -109,14 +109,17 @@ class UncachedTileLinkGenerator(id: Int)
io.mem.grant.ready := !sending && !io.finished
def wordFromBeat(addr: UInt, dat: UInt) = {
val offset = addr(tlByteAddrBits - 1, wordOffset)
val shift = Cat(offset, UInt(0, wordOffset + 3))
val shift = Cat(beatOffset(addr), UInt(0, wordOffset + 3))
(dat >> shift)(genWordBits - 1, 0)
}
assert(!io.mem.grant.valid || state =/= s_get ||
wordFromBeat(full_addr, io.mem.grant.bits.data) === word_data,
s"Get received incorrect data in uncached generator ${id}")
def beatOffset(addr: UInt) = // TODO zero-width
if (tlByteAddrBits > wordOffset) addr(tlByteAddrBits - 1, wordOffset)
else UInt(0)
}
class HellaCacheGenerator(id: Int)