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#include <util/singleton.H>
#include <kernel/taskmgr.H>
#include <kernel/task.H>
#include <kernel/pagemgr.H>
#include <arch/ppc.H>
void TaskManager::idleTaskLoop(void* unused)
{
while(1)
{
}
}
task_t* TaskManager::getCurrentTask()
{
register task_t* current_task = (task_t*) getSPRG3();
return current_task;
}
void TaskManager::setCurrentTask(task_t* t)
{
t->cpu = getCurrentTask()->cpu;
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;
task->tid = this->getNextTid();
// Function pointer 't' is actually a TOC entry.
// TOC[0] = function address
// TOC[1] = TOC base -> r2
task->context.nip = (void*) ((uint64_t*) t)[0];
task->context.gprs[2] = ((uint64_t*)t)[1];
// 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 =
PageManager::allocatePage(TASK_DEFAULT_STACK_SIZE);
task->context.gprs[1] = ((uint64_t)task->context.stack_ptr) + 16320;
}
else
{
task->context.stack_ptr = NULL;
}
return task;
}
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