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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/sys/prof/idletask.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2012,2018 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/** @file idletask.C
* @brief Code for the kernel idle-loop.
*
* This code exists here under the sys/prof directory to ensure that it does
* not get instrumented with code coverage. The idle threads run stack-less
* and bad things happen if they have been instrumented.
*/
#include <kernel/taskmgr.H>
#include <arch/ppc.H>
#include <sys/syscall.h>
using namespace Systemcalls;
void* TaskManager::idleTaskLoop(void* unused)
{
while(1)
{
// Lower priority (and yield simics thread).
setThreadPriorityLow();
// Request privilege escalation for nap.
asm volatile("li 3, %0; sc 2" :: "K" (MISC_CPUNAP) : "r3", "cc");
// Execute nap.
//@fixme-RTC:xxxxxx nap();
}
return NULL;
}
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