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tilelink2: Legacy should preserve the access size (#378)

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* tilelink2: Legacy should preserve the access size
* Legacy: extract missing size information for TL1 Puts
This commit is contained in:
Wesley W. Terpstra 2016-10-03 17:25:31 -07:00 committed by GitHub
parent 72e8c6f589
commit 6ec2e7c5bd
1 changed files with 22 additions and 4 deletions
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26
src/main/scala/uncore/tilelink2/Legacy.scala
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@ -63,12 +63,30 @@ class TLLegacy(implicit val p: Parameters) extends LazyModule with HasTileLinkPa
val wmask = io.legacy.acquire.bits.wmask()
val address = io.legacy.acquire.bits.full_addr()
val beat = UInt(log2Ceil(tlDataBytes))
val block = UInt(log2Ceil(tlDataBytes*tlDataBeats))
val size = io.legacy.acquire.bits.op_size()
// Find the operation size from the wmask
// Returns: (any_1, size)
def mask_helper(range: UInt): (Bool, UInt) = {
val len = range.getWidth
if (len == 1) {
(range === UInt(1), UInt(0))
} else {
val mid = len / 2
val lo = range(mid-1, 0)
val hi = range(len-1, mid)
val (lo_1, lo_s) = mask_helper(lo)
val (hi_1, hi_s) = mask_helper(hi)
val out_1 = lo_1 || hi_1
val out_s = Mux(lo_1, Mux(hi_1, UInt(log2Up(len)), lo_s), hi_s)
(out_1, out_s)
}
}
val wsize = mask_helper(wmask)._2
// Only create atomic messages if TL2 managers support them
val atomics = if (edge.manager.anySupportLogical) {
val size = io.legacy.acquire.bits.op_size()
MuxLookup(io.legacy.acquire.bits.op_code(), Wire(new TLBundleA(edge.bundle)), Array(
MemoryOpConstants.M_XA_SWAP -> edge.Logical(source, address, size, data, TLAtomics.SWAP)._2,
MemoryOpConstants.M_XA_XOR -> edge.Logical(source, address, size, data, TLAtomics.XOR) ._2,
@ -86,9 +104,9 @@ class TLLegacy(implicit val p: Parameters) extends LazyModule with HasTileLinkPa
}
out.a.bits := MuxLookup(io.legacy.acquire.bits.a_type, Wire(new TLBundleA(edge.bundle)), Array(
Acquire.getType -> edge.Get (source, address, beat) ._2,
Acquire.getType -> edge.Get (source, address, size) ._2,
Acquire.getBlockType -> edge.Get (source, address, block)._2,
Acquire.putType -> edge.Put (source, address, beat, data, wmask)._2,
Acquire.putType -> edge.Put (source, address, wsize, data, wmask)._2,
Acquire.putBlockType -> edge.Put (source, address, block, data, wmask)._2,
Acquire.getPrefetchType -> edge.Hint(source, address, block, UInt(0))._2,
Acquire.putPrefetchType -> edge.Hint(source, address, block, UInt(1))._2,