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fix(Uncache): handle flush #4230

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fix(Uncache): handle flush #4230

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37d3869
fix(Uncache): handle flush
Maxpicca-Li Jan 23, 2025
091dacf
fix(Uncache): grammar error
Maxpicca-Li Jan 23, 2025
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10 changes: 8 additions & 2 deletions src/main/scala/xiangshan/cache/dcache/Uncache.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -230,14 +230,20 @@ class UncacheImp(outer: Uncache)extends LazyModuleImp(outer)

val entries = Reg(Vec(UncacheBufferSize, new UncacheEntry))
val states = RegInit(VecInit(Seq.fill(UncacheBufferSize)(0.U.asTypeOf(new UncacheEntryState))))
val fence = RegInit(Bool(), false.B)
val s_idle :: s_inflight :: s_wait_return :: Nil = Enum(3)
val uState = RegInit(s_idle)

// drain buffer
val empty = Wire(Bool())
val f1_needDrain = Wire(Bool())
val do_uarch_drain = RegNext(f1_needDrain)
val do_uarch_drain = RegInit(false.B)
when((f1_needDrain || io.flush.valid) && !empty){
do_uarch_drain := true.B
}.elsewhen(empty){
do_uarch_drain := false.B
}.otherwise{
do_uarch_drain := false.B
}

val q0_entry = Wire(new UncacheEntry)
val q0_canSentIdx = Wire(UInt(INDEX_WIDTH.W))
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