/* $Id: thread.hh,v 1.10 2008-04-28 20:29:15 sybreon Exp $
|
/* $Id: thread.hh,v 1.10 2008-04-28 20:29:15 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 General Public License as published by
|
** under the terms of the GNU General Public License as published by
|
** the Free Software Foundation, either version 3 of the License, or
|
** the Free Software Foundation, either version 3 of the 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 General Public
|
** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
** License for more details.
|
** License for more details.
|
**
|
**
|
** You should have received a copy of the GNU General Public License
|
** You should have received a copy of the GNU General Public 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
|
|
|
These functions deal with the various hardware threads. It also
|
These functions deal with the various hardware threads. It also
|
provides simple mechanisms for toggling semaphores.
|
provides simple mechanisms for toggling semaphores.
|
*/
|
*/
|
|
|
#include "msr.hh"
|
#include "msr.hh"
|
|
|
#ifndef _AEMB_THREAD_HH
|
#ifndef _AEMB_THREAD_HH
|
#define _AEMB_THREAD_HH
|
#define _AEMB_THREAD_HH
|
|
|
#ifdef __cplusplus
|
#ifdef __cplusplus
|
extern "C" {
|
extern "C" {
|
#endif
|
#endif
|
|
|
/**
|
/**
|
Checks to see if currently executing Thread 1
|
Checks to see if currently executing Thread 1
|
@return true if is Thread 1
|
@return true if is Thread 1
|
*/
|
*/
|
|
|
inline int aembIsThread1()
|
static inline int aembIsThread1()
|
{
|
{
|
int rmsr = aembGetMSR();
|
int rmsr = aembGetMSR();
|
return ((rmsr & AEMB_MSR_PHA));
|
return ((rmsr & AEMB_MSR_PHA));
|
}
|
}
|
|
|
/**
|
/**
|
Checks to see if currently executing Thread 0
|
Checks to see if currently executing Thread 0
|
@return true if is Thread 0
|
@return true if is Thread 0
|
*/
|
*/
|
|
|
inline int aembIsThread0()
|
static inline int aembIsThread0()
|
{
|
{
|
int rmsr = aembGetMSR();
|
int rmsr = aembGetMSR();
|
return (!(rmsr & AEMB_MSR_PHA));
|
return (!(rmsr & AEMB_MSR_PHA));
|
}
|
}
|
|
|
/**
|
/**
|
Checks to see if it is multi-threaded or not.
|
Checks to see if it is multi-threaded or not.
|
@return true if thread capable
|
@return true if thread capable
|
*/
|
*/
|
inline int aembIsThreaded()
|
static inline int aembIsThreaded()
|
{
|
{
|
int rmsr = aembGetMSR();
|
int rmsr = aembGetMSR();
|
return (rmsr & AEMB_MSR_HTX);
|
return (rmsr & AEMB_MSR_HTX);
|
}
|
}
|
|
|
/**
|
/**
|
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 _aembFreeMTX()
|
static inline void _aembFreeMTX()
|
{
|
{
|
int tmp;
|
int tmp;
|
asm volatile ("msrclr %0, %1":"=r"(tmp):"K"(AEMB_MSR_MTX));
|
asm volatile ("msrclr %0, %1":"=r"(tmp):"K"(AEMB_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 _aembLockMTX()
|
static inline void _aembLockMTX()
|
{
|
{
|
int rmsr;
|
int rmsr;
|
do
|
do
|
{
|
{
|
asm volatile ("msrset %0, %1":"=r"(rmsr):"K"(AEMB_MSR_MTX));
|
asm volatile ("msrset %0, %1":"=r"(rmsr):"K"(AEMB_MSR_MTX));
|
}
|
}
|
while (rmsr & AEMB_MSR_MTX);
|
while (rmsr & AEMB_MSR_MTX);
|
}
|
}
|
|
|
#ifdef __cplusplus
|
#ifdef __cplusplus
|
}
|
}
|
#endif
|
#endif
|
|
|
#endif
|
#endif
|
|
|
