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// IBM_PROLOG_BEGIN_TAG
// This is an automatically generated prolog.
//
// $Source: src/lib/syscall_task.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 <sys/task.h>
#include <sys/syscall.h>
#include <kernel/task.H>
#include <kernel/taskmgr.H>
#include <kernel/cpu.H>
#include <sys/vfs.h>
#include <sys/msg.h>
using namespace Systemcalls;
void task_yield()
{
_syscall0(TASK_YIELD);
return;
}
tid_t task_create(void(*fn)(void*), void* ptr)
{
// Verify we have (memory) permissions to load the function pointer so
// we don't load bad memory from kernel space.
register uint64_t function = (uint64_t) fn;
asm volatile("ld %0, 0(%1)" : "=b"(function) : "b" (function));
return (tid_t)(uint64_t) _syscall2(TASK_START, (void*)fn, ptr);
}
void task_end()
{
_syscall0(TASK_END); // no return.
return;
}
tid_t task_gettid()
{
register task_t* task;
asm volatile("mr %0, 13" : "=r"(task));
return task->tid;
}
cpuid_t task_getcpuid()
{
register task_t* task;
asm volatile("mr %0, 13" : "=r"(task));
return task->cpu->cpu;
}
tid_t task_exec(const char* file, void* ptr)
{
// The VFS process is responsible for finding the module and creating the
// new process. So, we send a message over to that process.
tid_t child = -1;
// Create message, send.
msg_q_t vfsQ = (msg_q_t)_syscall0(MSGQ_RESOLVE_ROOT);
msg_t* msg = msg_allocate();
msg->type = VFS_MSG_EXEC;
msg->data[0] = (uint64_t) file;
msg->data[1] = (uint64_t) ptr;
int rc = msg_sendrecv(vfsQ, msg);
if (0 == rc)
{
// Get child ID from message data 0.
child = (tid_t) msg->data[0];
}
else
{
child = rc;
}
msg_free(msg);
return child;
}
void task_affinity_pin()
{
// Get task structure.
register task_t* task;
asm volatile("mr %0, 13" : "=r"(task));
// Increment pin count.
__sync_add_and_fetch(&task->affinity_pinned, 1);
}
void task_affinity_unpin()
{
// Get task structure.
register task_t* task;
asm volatile("mr %0, 13" : "=r"(task));
// Decrement pin count.
__sync_sub_and_fetch(&task->affinity_pinned, 1);
}
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