get rid of more global constants

rocket/src/main/scala/consts.scala

@@ -5,6 +5,7 @@ import Chisel._
 import scala.math._
 
 trait ScalarOpConstants {
+  val SZ_BR = 3
   val BR_X    = Bits("b???", 3)
   val BR_EQ   = Bits(0, 3)
   val BR_NE   = Bits(1, 3)
@@ -105,13 +106,6 @@ abstract trait RocketDcacheConstants extends uncore.constants.CacheConstants wit
   require(log2Up(OFFSET_BITS) <= uncore.Constants.X_INIT_SUBWORD_ADDR_BITS)
 }
 
-trait TLBConstants {
-  val BTB_ENTRIES = 8
-  val ITLB_ENTRIES = 8
-  val DTLB_ENTRIES = 16
-  val VITLB_ENTRIES = 4
-}
-
 trait VectorOpConstants {
   val VEC_X = Bits("b??", 2).toUFix
   val VEC_FN_N = UFix(0, 2)

rocket/src/main/scala/ctrl.scala

@@ -43,7 +43,7 @@ class ioCtrlDpath extends Bundle()
   // inputs from datapath
   val inst    = Bits(INPUT, 32);
   val jalr_eq = Bool(INPUT)
-  val ex_br_type = Bits(OUTPUT, 3)
+  val ex_br_type = Bits(OUTPUT, SZ_BR)
   val ex_br_taken = Bool(INPUT)
   val div_rdy = Bool(INPUT);
   val div_result_val = Bool(INPUT);

rocket/src/main/scala/dpath.scala

@@ -216,7 +216,7 @@ class Datapath(implicit conf: RocketConfiguration) extends Component
   io.ptw.status := pcr.io.status
   
 	// branch resolution logic
-  io.ctrl.jalr_eq := ex_rs1 === id_pc.toFix && ex_reg_inst(11,0) === UFix(0)
+  io.ctrl.jalr_eq := ex_rs1 === id_pc.toFix && ex_reg_inst(21,10) === UFix(0)
   io.ctrl.ex_br_taken :=
     Mux(io.ctrl.ex_br_type === BR_EQ,  ex_rs1 === ex_rs2,
     Mux(io.ctrl.ex_br_type === BR_NE,  ex_rs1 !=  ex_rs2,

rocket/src/main/scala/icache.scala

@@ -7,6 +7,7 @@ import uncore._
 import Util._
 
 case class ICacheConfig(sets: Int, assoc: Int, co: CoherencePolicyWithUncached,
+                        ntlb: Int = 8, nbtb: Int = 8,
                         code: Code = new IdentityCode)
 {
   val w = 1
@@ -56,9 +57,9 @@ class Frontend(implicit c: ICacheConfig) extends Component
     val mem = new ioUncachedRequestor
   }
   
-  val btb = new rocketDpathBTB(BTB_ENTRIES)
+  val btb = new rocketDpathBTB(c.nbtb)
   val icache = new ICache
-  val tlb = new TLB(ITLB_ENTRIES)
+  val tlb = new TLB(c.ntlb)
 
   val s1_pc = Reg() { UFix() }
   val s1_same_block = Reg() { Bool() }

rocket/src/main/scala/nbdcache.scala

@@ -7,7 +7,7 @@ import uncore._
 import Util._
 
 case class DCacheConfig(sets: Int, ways: Int, co: CoherencePolicy,
-                        nmshr: Int, nrpq: Int, nsdq: Int,
+                        nmshr: Int, nrpq: Int, nsdq: Int, ntlb: Int,
                         reqtagbits: Int = -1, databits: Int = -1)
 {
   require(isPow2(sets))

rocket/src/main/scala/package.scala

@@ -13,7 +13,6 @@ object Constants extends
   InterruptConstants with 
   RocketDcacheConstants with
   VectorOpConstants with 
-  TLBConstants with 
   uncore.constants.MemoryInterfaceConstants
 {
   val START_ADDR = 0x2000