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// IBM_PROLOG_BEGIN_TAG
// This is an automatically generated prolog.
//
// $Source: src/kernel/taskmgr.C $
//
// IBM CONFIDENTIAL
//
// COPYRIGHT International Business Machines Corp. 2010 - 2011
//
// p1
//
// Object Code Only (OCO) source materials
// Licensed Internal Code Source Materials
// IBM HostBoot Licensed Internal Code
//
// The source code for this program is not published or other-
// wise divested of its trade secrets, irrespective of what has
// been deposited with the U.S. Copyright Office.
//
// Origin: 30
//
// IBM_PROLOG_END
#include <util/singleton.H>
#include <kernel/taskmgr.H>
#include <kernel/task.H>
#include <kernel/pagemgr.H>
#include <kernel/cpumgr.H>
#include <kernel/stacksegment.H>
#include <sys/task.h>
#include <arch/ppc.H>
#include <string.h>
#include <limits.h>
extern "C" void userspace_task_entry();
void TaskManager::idleTaskLoop(void* unused)
{
while(1)
{
setThreadPriorityLow();
}
}
task_t* TaskManager::getCurrentTask()
{
register task_t* current_task = (task_t*) getSPRG3();
return current_task;
}
void TaskManager::setCurrentTask(task_t* t)
{
t->cpu = CpuManager::getCurrentCPU();
setSPRG3((uint64_t)t);
return;
}
TaskManager::TaskManager() : iv_nextTid()
{
}
task_t* TaskManager::createIdleTask()
{
return Singleton<TaskManager>::instance()._createIdleTask();
}
task_t* TaskManager::createTask(TaskManager::task_fn_t t, void* p)
{
return Singleton<TaskManager>::instance()._createTask(t, p, true);
}
task_t* TaskManager::_createIdleTask()
{
return this->_createTask(&TaskManager::idleTaskLoop, NULL, false);
}
task_t* TaskManager::_createTask(TaskManager::task_fn_t t,
void* p, bool withStack)
{
task_t* task = new task_t;
memset(task, '\0', sizeof(task_t));
task->tid = this->getNextTid();
// Set NIP to be userspace_task_entry stub and GPR3 to be the
// function pointer for the desired task entry point.
task->context.nip = reinterpret_cast<void*>(&userspace_task_entry);
task->context.gprs[4] = reinterpret_cast<uint64_t>(t);
// Set up LR to be the entry point for task_end in case a task
// 'returns' from its entry point. By the Power ABI, the entry
// point address is in (func_ptr)[0].
task->context.lr = reinterpret_cast<uint64_t*>(&task_end)[0];
// Set up GRP[13] as task structure reserved.
task->context.gprs[13] = (uint64_t)task;
// Set up argument.
task->context.gprs[3] = (uint64_t) p;
// Setup stack.
if (withStack)
{
task->context.stack_ptr = StackSegment::createStack(task->tid);
task->context.gprs[1] =
reinterpret_cast<uint64_t>(task->context.stack_ptr);
}
else
{
task->context.stack_ptr = NULL;
task->context.gprs[1] = NULL;
}
// Clear FP context (start with FP disabled on all tasks).
task->fp_context = NULL;
return task;
}
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