| Line 1... |
Line 1... |
/* $Id: thread.hh,v 1.8 2008-04-26 19:31:35 sybreon Exp $
|
/* $Id: thread.hh,v 1.9 2008-04-27 16:33:42 sybreon Exp $
|
**
|
**
|
** AEMB2 HI-PERFORMANCE CPU
|
** AEMB2 HI-PERFORMANCE CPU
|
** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap
|
** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap
|
**
|
**
|
** This file is part of AEMB.
|
** This file is part of AEMB.
|
**
|
**
|
** AEMB is free software: you can redistribute it and/or modify it
|
** AEMB is free software: you can redistribute it and/or modify it
|
** under the terms of the GNU Lesser General Public License as
|
** under the terms of the GNU General Public License as published by
|
** published by the Free Software Foundation, either version 3 of the
|
** the Free Software Foundation, either version 3 of the License, or
|
** License, or (at your option) any later version.
|
** (at your option) any later version.
|
**
|
**
|
** AEMB is distributed in the hope that it will be useful, but WITHOUT
|
** AEMB is distributed in the hope that it will be useful, but WITHOUT
|
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
|
** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
** Public License for more details.
|
** License for more details.
|
**
|
**
|
** You should have received a copy of the GNU Lesser General Public
|
** You should have received a copy of the GNU General Public License
|
** License along with AEMB. If not, see .
|
** along with AEMB. If not, see .
|
*/
|
*/
|
|
|
/**
|
/**
|
Basic thread functions
|
Basic thread functions
|
@file thread.hh
|
@file thread.hh
|
| Line 70... |
Line 70... |
|
|
/**
|
/**
|
Hardware Mutex Signal.
|
Hardware Mutex Signal.
|
Unlock the hardware mutex, which is unlocked on reset.
|
Unlock the hardware mutex, which is unlocked on reset.
|
*/
|
*/
|
inline void signalMutex()
|
inline void _mtx_free()
|
{
|
{
|
int tmp;
|
int tmp;
|
asm volatile ("msrclr %0, 0x0010":"=r"(tmp));
|
asm volatile ("msrclr %0, %1":"=r"(tmp):"K"(MSR_MTX));
|
}
|
}
|
|
|
/**
|
/**
|
Hardware Mutex Wait.
|
Hardware Mutex Wait.
|
|
|
Waits until the hardware mutex is unlocked. This should be used
|
Waits until the hardware mutex is unlocked. This should be used
|
as part of a larger software mutex mechanism.
|
as part of a larger software mutex mechanism.
|
*/
|
*/
|
inline void waitMutex()
|
inline void _mtx_lock()
|
{
|
{
|
int rmsr;
|
int rmsr;
|
do
|
do
|
{
|
{
|
asm volatile ("msrset %0, 0x0010":"=r"(rmsr));
|
asm volatile ("msrset %0, %1":"=r"(rmsr):"K"(MSR_MTX));
|
}
|
}
|
while (rmsr & MSR_MTX);
|
while (rmsr & MSR_MTX);
|
}
|
}
|
|
|
// TODO: Extend this library to include threading mechanisms such as
|
// TODO: Extend this library to include threading mechanisms such as
|
| Line 101... |
Line 101... |
Semaphore struct.
|
Semaphore struct.
|
Presently implemented as software solution but a hardware one may be
|
Presently implemented as software solution but a hardware one may be
|
required as the threads are hardware.
|
required as the threads are hardware.
|
*/
|
*/
|
|
|
typedef volatile int semaphore;
|
typedef int semaphore;
|
|
|
/**
|
/**
|
Increment the semaphore
|
Software Semaphore Signal.
|
|
|
|
Increment the semaphore and run. This is a software mechanism.
|
*/
|
*/
|
inline void signal(semaphore _sem) { _sem++; }
|
inline void signal(volatile semaphore _sem)
|
|
{
|
|
_mtx_lock();
|
|
_sem++;
|
|
_mtx_free();
|
|
}
|
|
|
/**
|
/**
|
Decrement the semaphore and block if < 0
|
Software Semaphore Wait.
|
|
|
|
Decrement the semaphore and block if < 0. This is a software
|
|
mechanism.
|
*/
|
*/
|
inline void wait(semaphore _sem) { _sem--; while (_sem < 0); } // block while
|
inline void wait(volatile semaphore _sem)
|
// semaphore is
|
{
|
// negative
|
_mtx_lock();
|
|
_sem--;
|
|
_mtx_free();
|
|
while (_sem < 0);
|
|
}
|
|
|
semaphore __mutex_rendezvous0 = 0; ///< internal rendezvous mutex
|
semaphore __mutex_rendezvous0 = 0; ///< internal rendezvous mutex
|
semaphore __mutex_rendezvous1 = 1; ///< internal rendezvous mutex
|
semaphore __mutex_rendezvous1 = 1; ///< internal rendezvous mutex
|
|
|
/**
|
/**
|
Implements a simple rendezvous mechanism
|
Implements a simple rendezvous mechanism
|
*/
|
*/
|
|
|
void rendezvous()
|
inline void rendezvous()
|
{
|
{
|
if (isThread1())
|
if (isThread1())
|
{
|
{
|
wait(__mutex_rendezvous0);
|
wait(__mutex_rendezvous0);
|
signal(__mutex_rendezvous1);
|
signal(__mutex_rendezvous1);
|
| Line 144... |
Line 158... |
|
|
#endif
|
#endif
|
|
|
/*
|
/*
|
$Log: not supported by cvs2svn $
|
$Log: not supported by cvs2svn $
|
|
Revision 1.8 2008/04/26 19:31:35 sybreon
|
|
Made headers C compatible.
|
|
|
Revision 1.7 2008/04/26 18:05:22 sybreon
|
Revision 1.7 2008/04/26 18:05:22 sybreon
|
Minor cosmetic changes.
|
Minor cosmetic changes.
|
|
|
Revision 1.6 2008/04/23 14:19:39 sybreon
|
Revision 1.6 2008/04/23 14:19:39 sybreon
|
Fixed minor bugs.
|
Fixed minor bugs.
|
