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tilelink2: Monitor should check mask of reconstructed request

This commit is contained in:
Wesley W. Terpstra 2016-09-04 18:22:12 -07:00
parent df32cc3887
commit a0c25880c7
2 changed files with 21 additions and 3 deletions
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20
src/main/scala/uncore/tilelink2/Edges.scala
View File

@ -20,12 +20,13 @@ class TLEdge(
// This gets used everywhere, so make the smallest circuit possible ...
def fullMask(address: UInt, lgSize: UInt) = {
val lgBytes = log2Ceil(manager.beatBytes)
val sizeOH = UIntToOH(lgSize, lgBytes)
def helper(i: Int): Seq[(Bool, Bool)] = {
if (i == 0) {
Seq((lgSize >= UInt(lgBytes), Bool(true)))
} else {
val sub = helper(i-1)
val size = lgSize === UInt(lgBytes - i)
val size = sizeOH(lgBytes - i)
val bit = address(lgBytes - i)
val nbit = !bit
Seq.tabulate (1 << i) { j =>
@ -39,6 +40,23 @@ class TLEdge(
Cat(helper(lgBytes).map(_._1).reverse)
}
def lowAddress(mask: UInt) = {
// Almost OHToUInt, but any bit in low => use low address
def helper(mask: UInt, width: Int): UInt = {
if (width <= 1) {
UInt(0)
} else if (width == 2) {
~mask(0, 0)
} else {
val mid = 1 << (log2Up(width)-1)
val hi = mask(width-1, mid)
val lo = mask(mid-1, 0)
Cat(!lo.orR, helper(hi | lo, mid))
}
}
helper(mask, bundle.dataBits/8)
}
def staticHasData(bundle: HasTLOpcode): Option[Boolean] = {
bundle.channelType() match {
case ChannelType.A => {

4
src/main/scala/uncore/tilelink2/Monitor.scala
View File

@ -20,7 +20,7 @@ object TLMonitor
// Reuse these subexpressions to save some firrtl lines
val source_ok = edge.client.contains(bundle.source)
val is_aligned = edge.isAligned(bundle.address, bundle.size)
val mask = edge.fullMask(bundle.address, bundle.size)
val mask = edge.fullMask(bundle.address | edge.lowAddress(bundle.mask), bundle.size)
when (bundle.opcode === TLMessages.Acquire) {
assert (edge.manager.supportsAcquire(bundle.address, bundle.size), "'A' channel carries Acquire type unsupported by manager" + extra)
@ -86,7 +86,7 @@ object TLMonitor
// Reuse these subexpressions to save some firrtl lines
val address_ok = edge.manager.contains(bundle.source)
val is_aligned = edge.isAligned(bundle.address, bundle.size)
val mask = edge.fullMask(bundle.address, bundle.size)
val mask = edge.fullMask(bundle.address | edge.lowAddress(bundle.mask), bundle.size)
when (bundle.opcode === TLMessages.Probe) {
assert (edge.client.supportsProbe(bundle.source, bundle.size), "'B' channel carries Probe type unsupported by client" + extra)