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, 0 insertions, 27 deletions

diff --git a/src/cpu/base.cc b/src/cpu/base.cc
index 0f9fe49ea..624843f42 100644
--- a/src/cpu/base.cc
+++ b/src/cpu/base.cc
@@ -64,7 +64,6 @@
 #include "debug/SyscallVerbose.hh"
 #include "mem/page_table.hh"
 #include "params/BaseCPU.hh"
-#include "sim/clocked_object.hh"
 #include "sim/full_system.hh"
 #include "sim/process.hh"
 #include "sim/sim_events.hh"
@@ -356,11 +355,6 @@ BaseCPU::startup()
     if (params()->progress_interval) {
         new CPUProgressEvent(this, params()->progress_interval);
     }
-
-    // Assumption CPU start to operate instantaneously without any latency
-    if (ClockedObject::pwrState() == Enums::PwrState::UNDEFINED)
-        ClockedObject::pwrState(Enums::PwrState::ON);
-
 }
 
 ProbePoints::PMUUPtr
@@ -479,27 +473,6 @@ BaseCPU::findContext(ThreadContext *tc)
 }
 
 void
-BaseCPU::activateContext(ThreadID thread_num)
-{
-    // For any active thread running, update CPU power state to active (ON)
-    ClockedObject::pwrState(Enums::PwrState::ON);
-}
-
-void
-BaseCPU::suspendContext(ThreadID thread_num)
-{
-    // Check if all threads are suspended
-    for (auto t : threadContexts) {
-        if (t->status() != ThreadContext::Suspended) {
-            return;
-        }
-    }
-
-    // All CPU threads suspended, enter lower power state for the CPU
-    ClockedObject::pwrState(Enums::PwrState::CLK_GATED);
-}
-
-void
 BaseCPU::switchOut()
 {
     assert(!_switchedOut);