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tilelink: TestSRAM reports errors on illegal access

This commit is contained in:
Wesley W. Terpstra 2017-07-07 21:13:07 -07:00
parent e8cb6dafd3
commit b2cc4b99ed
1 changed files with 3 additions and 2 deletions
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5
src/main/scala/devices/tilelink/TestRAM.scala
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@ -49,12 +49,13 @@ class TLTestRAM(address: AddressSet, executable: Boolean = true, beatBytes: Int
in.d.valid := in.a.valid
val hasData = edge.hasData(in.a.bits)
val legal = address.contains(in.a.bits.address)
val wdata = Vec.tabulate(beatBytes) { i => in.a.bits.data(8*(i+1)-1, 8*i) }
in.d.bits := edge.AccessAck(in.a.bits, UInt(0))
in.d.bits := edge.AccessAck(in.a.bits, UInt(0), !legal)
in.d.bits.data := Cat(mem(memAddress).reverse)
in.d.bits.opcode := Mux(hasData, TLMessages.AccessAck, TLMessages.AccessAckData)
when (in.a.fire() && hasData) { mem.write(memAddress, wdata, in.a.bits.mask.toBools) }
when (in.a.fire() && hasData && legal) { mem.write(memAddress, wdata, in.a.bits.mask.toBools) }
// Tie off unused channels
in.b.valid := Bool(false)