Revert power patch sets with unexpected interactions

The following patches had unexpected interactions with the current
upstream code and have been reverted for now:

e07fd01651f3: power: Add support for power models
831c7f2f9e39: power: Low-power idle power state for idle CPUs
4f749e00b667: power: Add power states to ClockedObject

Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>

--HG--
extra : amend_source : 0b6fb073c6bbc24be533ec431eb51fbf1b269508

1 files changed, 7 insertions, 11 deletions

diff --git a/src/cpu/pred/btb.cc b/src/cpu/pred/btb.cc
index c7ef1959f..393e52ccf 100644
--- a/src/cpu/pred/btb.cc
+++ b/src/cpu/pred/btb.cc
@@ -35,12 +35,10 @@
 
 DefaultBTB::DefaultBTB(unsigned _numEntries,
                        unsigned _tagBits,
-                       unsigned _instShiftAmt,
-                       unsigned _num_threads)
+                       unsigned _instShiftAmt)
     : numEntries(_numEntries),
       tagBits(_tagBits),
-      instShiftAmt(_instShiftAmt),
-      log2NumThreads(floorLog2(_num_threads))
+      instShiftAmt(_instShiftAmt)
 {
     DPRINTF(Fetch, "BTB: Creating BTB object.\n");
 
@@ -71,12 +69,10 @@ DefaultBTB::reset()
 
 inline
 unsigned
-DefaultBTB::getIndex(Addr instPC, ThreadID tid)
+DefaultBTB::getIndex(Addr instPC)
 {
     // Need to shift PC over by the word offset.
-    return ((instPC >> instShiftAmt)
-            ^ (tid << (tagShiftAmt - instShiftAmt - log2NumThreads)))
-            & idxMask;
+    return (instPC >> instShiftAmt) & idxMask;
 }
 
 inline
@@ -89,7 +85,7 @@ DefaultBTB::getTag(Addr instPC)
 bool
 DefaultBTB::valid(Addr instPC, ThreadID tid)
 {
-    unsigned btb_idx = getIndex(instPC, tid);
+    unsigned btb_idx = getIndex(instPC);
 
     Addr inst_tag = getTag(instPC);
 
@@ -110,7 +106,7 @@ DefaultBTB::valid(Addr instPC, ThreadID tid)
 TheISA::PCState
 DefaultBTB::lookup(Addr instPC, ThreadID tid)
 {
-    unsigned btb_idx = getIndex(instPC, tid);
+    unsigned btb_idx = getIndex(instPC);
 
     Addr inst_tag = getTag(instPC);
 
@@ -128,7 +124,7 @@ DefaultBTB::lookup(Addr instPC, ThreadID tid)
 void
 DefaultBTB::update(Addr instPC, const TheISA::PCState &target, ThreadID tid)
 {
-    unsigned btb_idx = getIndex(instPC, tid);
+    unsigned btb_idx = getIndex(instPC);
 
     assert(btb_idx < numEntries);