riscv/rocket-chip
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Remove duplicate PseudoLRU class from rocket TLB

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This commit is contained in:
Albert Magyar 2015-12-16 16:12:47 -08:00
parent 7690de07e1
commit 01a3447989
1 changed files with 1 additions and 23 deletions
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24
rocket/src/main/scala/tlb.scala
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@ -7,6 +7,7 @@ import Util._
import junctions._ import junctions._
import scala.math._ import scala.math._
import cde.{Parameters, Field} import cde.{Parameters, Field}
import uncore.PseudoLRU
case object NTLBEntries extends Field[Int] case object NTLBEntries extends Field[Int]
@ -54,29 +55,6 @@ class RocketCAM(implicit p: Parameters) extends TLBModule()(p) {
io.hit := io.hits.orR io.hit := io.hits.orR
} }
class PseudoLRU(n: Int)
{
val state = Reg(Bits(width = n))
def access(way: UInt) = {
var next_state = state
var idx = UInt(1,1)
for (i <- log2Up(n)-1 to 0 by -1) {
val bit = way(i)
val mask = (UInt(1,n) << idx)(n-1,0)
next_state = next_state & ~mask | Mux(bit, UInt(0), mask)
//next_state.bitSet(idx, !bit)
idx = Cat(idx, bit)
}
state := next_state
}
def replace = {
var idx = UInt(1,1)
for (i <- 0 until log2Up(n))
idx = Cat(idx, state(idx))
idx(log2Up(n)-1,0)
}
}
class TLBReq(implicit p: Parameters) extends CoreBundle()(p) { class TLBReq(implicit p: Parameters) extends CoreBundle()(p) {
val asid = UInt(width = asIdBits) val asid = UInt(width = asIdBits)
val vpn = UInt(width = vpnBits+1) val vpn = UInt(width = vpnBits+1)