/* $Id: thread.hh,v 1.10 2008-04-28 20:29:15 sybreon Exp $
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/* $Id: thread.hh,v 1.10 2008-04-28 20:29:15 sybreon Exp $
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**
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**
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** AEMB2 HI-PERFORMANCE CPU
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** AEMB2 HI-PERFORMANCE CPU
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** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap
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** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap
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**
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**
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** This file is part of AEMB.
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** This file is part of AEMB.
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**
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**
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** AEMB is free software: you can redistribute it and/or modify it
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** AEMB is free software: you can redistribute it and/or modify it
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** under the terms of the GNU General Public License as published by
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** under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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** (at your option) any later version.
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**
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**
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** AEMB is distributed in the hope that it will be useful, but WITHOUT
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** AEMB is distributed in the hope that it will be useful, but WITHOUT
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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** or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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** License for more details.
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** License for more details.
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**
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**
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** You should have received a copy of the GNU General Public License
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** You should have received a copy of the GNU General Public License
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** along with AEMB. If not, see .
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** along with AEMB. If not, see .
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*/
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*/
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/**
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/**
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Basic thread functions
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Basic thread functions
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@file thread.hh
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@file thread.hh
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These functions deal with the various hardware threads. It also
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These functions deal with the various hardware threads. It also
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provides simple mechanisms for toggling semaphores.
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provides simple mechanisms for toggling semaphores.
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*/
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*/
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#include "msr.hh"
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#include "msr.hh"
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#ifndef _AEMB_THREAD_HH
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#ifndef _AEMB_THREAD_HH
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#define _AEMB_THREAD_HH
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#define _AEMB_THREAD_HH
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#ifdef __cplusplus
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#ifdef __cplusplus
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extern "C" {
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extern "C" {
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#endif
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#endif
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/**
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/**
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Checks to see if currently executing Thread 1
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Checks to see if currently executing Thread 1
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@return true if is Thread 1
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@return true if is Thread 1
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*/
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*/
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inline int aembIsThread1()
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static inline int aembIsThread1()
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{
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{
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int rmsr = aembGetMSR();
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int rmsr = aembGetMSR();
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return ((rmsr & AEMB_MSR_PHA));
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return ((rmsr & AEMB_MSR_PHA));
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}
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}
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/**
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/**
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Checks to see if currently executing Thread 0
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Checks to see if currently executing Thread 0
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@return true if is Thread 0
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@return true if is Thread 0
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*/
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*/
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inline int aembIsThread0()
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static inline int aembIsThread0()
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{
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{
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int rmsr = aembGetMSR();
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int rmsr = aembGetMSR();
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return (!(rmsr & AEMB_MSR_PHA));
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return (!(rmsr & AEMB_MSR_PHA));
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}
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}
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/**
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/**
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Checks to see if it is multi-threaded or not.
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Checks to see if it is multi-threaded or not.
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@return true if thread capable
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@return true if thread capable
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*/
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*/
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inline int aembIsThreaded()
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static inline int aembIsThreaded()
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{
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{
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int rmsr = aembGetMSR();
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int rmsr = aembGetMSR();
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return (rmsr & AEMB_MSR_HTX);
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return (rmsr & AEMB_MSR_HTX);
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}
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}
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/**
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/**
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Hardware Mutex Signal.
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Hardware Mutex Signal.
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Unlock the hardware mutex, which is unlocked on reset.
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Unlock the hardware mutex, which is unlocked on reset.
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*/
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*/
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inline void _aembFreeMTX()
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static inline void _aembFreeMTX()
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{
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{
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int tmp;
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int tmp;
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asm volatile ("msrclr %0, %1":"=r"(tmp):"K"(AEMB_MSR_MTX));
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asm volatile ("msrclr %0, %1":"=r"(tmp):"K"(AEMB_MSR_MTX));
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}
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}
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/**
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/**
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Hardware Mutex Wait.
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Hardware Mutex Wait.
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Waits until the hardware mutex is unlocked. This should be used
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Waits until the hardware mutex is unlocked. This should be used
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as part of a larger software mutex mechanism.
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as part of a larger software mutex mechanism.
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*/
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*/
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inline void _aembLockMTX()
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static inline void _aembLockMTX()
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{
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{
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int rmsr;
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int rmsr;
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do
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do
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{
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{
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asm volatile ("msrset %0, %1":"=r"(rmsr):"K"(AEMB_MSR_MTX));
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asm volatile ("msrset %0, %1":"=r"(rmsr):"K"(AEMB_MSR_MTX));
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}
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}
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while (rmsr & AEMB_MSR_MTX);
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while (rmsr & AEMB_MSR_MTX);
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}
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}
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#ifdef __cplusplus
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#ifdef __cplusplus
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}
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}
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#endif
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#endif
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#endif
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#endif
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