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/* $Id: thread.hh,v 1.10 2008-04-28 20:29:15 sybreon Exp $
**
** AEMB2 HI-PERFORMANCE CPU
** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap <shawn.tan@aeste.net>
**
** This file is part of AEMB.
**
** AEMB is free software: you can redistribute it and/or modify it
** under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** AEMB is distributed in the hope that it will be useful, but WITHOUT
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
** License for more details.
**
** You should have received a copy of the GNU General Public License
** along with AEMB. If not, see <http://www.gnu.org/licenses/>.
*/
/**
Basic thread functions
@file thread.hh
These functions deal with the various hardware threads. It also
provides simple mechanisms for toggling semaphores.
*/
#include "aemb/msr.hh"
#ifndef _AEMB_THREAD_HH
#define _AEMB_THREAD_HH
#ifdef __cplusplus
extern "C" {
#endif
/**
Checks to see if currently executing Thread 1
@return true if is Thread 1
*/
inline int aembIsThread1()
{
int rmsr = aembGetMSR();
return ((rmsr & AEMB_MSR_HTX) && (rmsr & AEMB_MSR_PHA));
}
/**
Checks to see if currently executing Thread 0
@return true if is Thread 0
*/
inline int aembIsThread0()
{
int rmsr = aembGetMSR();
return ((rmsr & AEMB_MSR_HTX) && (!(rmsr & AEMB_MSR_PHA)));
}
/**
Checks to see if it is multi-threaded or not.
@return true if thread capable
*/
inline int aembIsThreaded()
{
int rmsr = aembGetMSR();
return (rmsr & AEMB_MSR_HTX);
}
/**
Hardware Mutex Signal.
Unlock the hardware mutex, which is unlocked on reset.
*/
inline void _aembFreeMTX()
{
int tmp;
asm volatile ("msrclr %0, %1":"=r"(tmp):"K"(AEMB_MSR_MTX));
}
/**
Hardware Mutex Wait.
Waits until the hardware mutex is unlocked. This should be used
as part of a larger software mutex mechanism.
*/
inline void _aembLockMTX()
{
int rmsr;
do
{
asm volatile ("msrset %0, %1":"=r"(rmsr):"K"(AEMB_MSR_MTX));
}
while (rmsr & AEMB_MSR_MTX);
}
#ifdef __cplusplus
}
#endif
#endif
/*
$Log: not supported by cvs2svn $
Revision 1.9 2008/04/27 16:33:42 sybreon
License change to GPL3.
Revision 1.8 2008/04/26 19:31:35 sybreon
Made headers C compatible.
Revision 1.7 2008/04/26 18:05:22 sybreon
Minor cosmetic changes.
Revision 1.6 2008/04/23 14:19:39 sybreon
Fixed minor bugs.
Initial use of hardware mutex.
Revision 1.5 2008/04/20 16:35:53 sybreon
Added C/C++ compatible #ifdef statements
Revision 1.4 2008/04/12 14:07:26 sybreon
added a rendezvous function
Revision 1.3 2008/04/11 15:53:24 sybreon
changed MSR bits
Revision 1.2 2008/04/11 11:34:30 sybreon
changed semaphore case
Revision 1.1 2008/04/09 19:48:37 sybreon
Added new C++ files
*/
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