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/*
 * Copyright (c) 2004 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __LINUX_TREADNIFO_HH__
#define __LINUX_TREADNIFO_HH__


#include "targetarch/isa_traits.hh"
#include "targetarch/vptr.hh"
#include "cpu/exec_context.hh"
#include "kern/linux/thread_info.hh"
#include "kern/linux/sched.hh"


namespace Linux {

class ThreadInfo
{
    private:
        ExecContext *xc;

    public:
        ThreadInfo(ExecContext *exec) : xc(exec) {}
        ~ThreadInfo() {}

        inline VPtr<thread_info>
        curThreadInfo()
        {
            Addr current;

            /* Each kernel stack is only 2 pages, the start of which is the
             * thread_info struct. So we can get the address by masking off
             * the lower 14 bits.
             */
            current = xc->regs.intRegFile[StackPointerReg] & ~0x3fff;
            return VPtr<thread_info>(xc, current);
        }

        inline VPtr<task_struct>
        curTaskInfo()
        {
            Addr task = curThreadInfo()->task;
            return VPtr<task_struct>(xc, task);
        }

        string
        curTaskName()
        {
            return curTaskInfo()->comm;
        }

        int32_t
        curTaskPID()
        {
            return curTaskInfo()->pid;
        }

        uint64_t
        curTaskStart()
        {
            return curTaskInfo()->start_time;
        }
};
}

#endif /* __LINUX_THREADINFO_HH__ */