diff options
Diffstat (limited to 'src/cpu/base.cc')
| -rw-r--r-- | src/cpu/base.cc | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/src/cpu/base.cc b/src/cpu/base.cc index fbd8af99a..aaf5a7a93 100644 --- a/src/cpu/base.cc +++ b/src/cpu/base.cc @@ -1,5 +1,5 @@ /* - * Copyright (c) 2011-2012 ARM Limited + * Copyright (c) 2011-2012,2016 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -64,6 +64,7 @@ #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" @@ -355,6 +356,11 @@ 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 @@ -475,6 +481,27 @@ 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); |