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AXI4: add an optional user bundle field

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This commit is contained in:
Wesley W. Terpstra
2017-03-17 17:06:04 -07:00
parent d6e69066a5
commit 396ecacda4
3 changed files with 19 additions and 7 deletions
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17
src/main/scala/uncore/axi4/Parameters.scala
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@ -70,9 +70,13 @@ case class AXI4MasterParameters(
}
case class AXI4MasterPortParameters(
masters: Seq[AXI4MasterParameters])
masters: Seq[AXI4MasterParameters],
userBits: Int = 0,
maxFlight: Int = 0) // at most X transactions per ID (0 = unlimited)
{
val endId = masters.map(_.id.end).max
require (userBits >= 0)
require (maxFlight >= 0)
// Require disjoint ranges for ids
masters.combinations(2).foreach { case Seq(x,y) => require (!x.id.overlaps(y.id), s"$x and $y overlap") }
@ -81,7 +85,8 @@ case class AXI4MasterPortParameters(
case class AXI4BundleParameters(
addrBits: Int,
dataBits: Int,
idBits: Int)
idBits: Int,
userBits: Int)
{
require (dataBits >= 8, s"AXI4 data bits must be >= 8 (got $dataBits)")
require (addrBits >= 1, s"AXI4 addr bits must be >= 1 (got $addrBits)")
@ -102,19 +107,21 @@ case class AXI4BundleParameters(
AXI4BundleParameters(
max(addrBits, x.addrBits),
max(dataBits, x.dataBits),
max(idBits, x.idBits))
max(idBits, x.idBits),
max(userBits, x.userBits))
}
object AXI4BundleParameters
{
val emptyBundleParams = AXI4BundleParameters(addrBits=1, dataBits=8, idBits=1)
val emptyBundleParams = AXI4BundleParameters(addrBits=1, dataBits=8, idBits=1, userBits=0)
def union(x: Seq[AXI4BundleParameters]) = x.foldLeft(emptyBundleParams)((x,y) => x.union(y))
def apply(master: AXI4MasterPortParameters, slave: AXI4SlavePortParameters) =
new AXI4BundleParameters(
addrBits = log2Up(slave.maxAddress+1),
dataBits = slave.beatBytes * 8,
idBits = log2Up(master.endId))
idBits = log2Up(master.endId),
userBits = master.userBits)
}
case class AXI4EdgeParameters(