riscv/rocket-chip
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removed AddressSpaceConstants, CacheConstants, and TileLinkSizeConstants

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This commit is contained in:
Henry Cook
2014-04-01 17:15:46 -07:00
parent ebdc0a2692
commit 910b3b203a
10 changed files with 135 additions and 126 deletions
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24
rocket/src/main/scala/tlb.scala
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@ -1,7 +1,7 @@
package rocket
import Chisel._
import uncore.constants.AddressConstants._
import uncore.AddressSpaceConfiguration
import scala.math._
class CAMIO(entries: Int, addr_bits: Int, tag_bits: Int) extends Bundle {
@ -64,28 +64,30 @@ class PseudoLRU(n: Int)
}
}
class TLBReq extends Bundle
class TLBReq()(implicit conf: AddressSpaceConfiguration) extends Bundle
{
val asid = UInt(width = ASID_BITS)
val vpn = UInt(width = VPN_BITS+1)
val asid = UInt(width = conf.asidBits)
val vpn = UInt(width = conf.vpnBits+1)
val passthrough = Bool()
val instruction = Bool()
override def clone = new TLBReq().asInstanceOf[this.type]
}
class TLBResp(entries: Int) extends Bundle
class TLBResp(entries: Int)(implicit conf: AddressSpaceConfiguration) extends Bundle
{
// lookup responses
val miss = Bool(OUTPUT)
val hit_idx = UInt(OUTPUT, entries)
val ppn = UInt(OUTPUT, PPN_BITS)
val ppn = UInt(OUTPUT, conf.ppnBits)
val xcpt_ld = Bool(OUTPUT)
val xcpt_st = Bool(OUTPUT)
val xcpt_if = Bool(OUTPUT)
override def clone = new TLBResp(entries).asInstanceOf[this.type]
override def clone = new TLBResp(entries)(conf).asInstanceOf[this.type]
}
class TLB(entries: Int) extends Module
class TLB(entries: Int)(implicit conf: AddressSpaceConfiguration) extends Module
{
val io = new Bundle {
val req = Decoupled(new TLBReq).flip
@ -98,7 +100,7 @@ class TLB(entries: Int) extends Module
val r_refill_tag = Reg(UInt())
val r_refill_waddr = Reg(UInt())
val tag_cam = Module(new RocketCAM(entries, ASID_BITS+VPN_BITS))
val tag_cam = Module(new RocketCAM(entries, conf.asidBits+conf.vpnBits))
val tag_ram = Vec.fill(entries){Reg(io.ptw.resp.bits.ppn.clone)}
val lookup_tag = Cat(io.req.bits.asid, io.req.bits.vpn).toUInt
@ -135,7 +137,7 @@ class TLB(entries: Int) extends Module
val plru = new PseudoLRU(entries)
val repl_waddr = Mux(has_invalid_entry, invalid_entry, plru.replace)
val bad_va = io.req.bits.vpn(VPN_BITS) != io.req.bits.vpn(VPN_BITS-1)
val bad_va = io.req.bits.vpn(conf.vpnBits) != io.req.bits.vpn(conf.vpnBits-1)
val tlb_hit = io.ptw.status.vm && tag_hit
val tlb_miss = io.ptw.status.vm && !tag_hit && !bad_va
@ -148,7 +150,7 @@ class TLB(entries: Int) extends Module
io.resp.xcpt_st := bad_va || tlb_hit && !Mux(io.ptw.status.s, (sw_array & tag_cam.io.hits).orR, (uw_array & tag_cam.io.hits).orR)
io.resp.xcpt_if := bad_va || tlb_hit && !Mux(io.ptw.status.s, (sx_array & tag_cam.io.hits).orR, (ux_array & tag_cam.io.hits).orR)
io.resp.miss := tlb_miss
io.resp.ppn := Mux(io.ptw.status.vm && !io.req.bits.passthrough, Mux1H(tag_cam.io.hits, tag_ram), io.req.bits.vpn(PPN_BITS-1,0))
io.resp.ppn := Mux(io.ptw.status.vm && !io.req.bits.passthrough, Mux1H(tag_cam.io.hits, tag_ram), io.req.bits.vpn(conf.ppnBits-1,0))
io.resp.hit_idx := tag_cam.io.hits
io.ptw.req.valid := state === s_request