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/* $Id: hook.hh,v 1.2 2008-04-11 15:20:31 sybreon Exp $
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/* $Id: hook.hh,v 1.3 2008-04-12 13:46:02 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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Basic begin/end hooks
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Basic begin/end hooks
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@file hook.hh
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@file hook.hh
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These routines hook themselves onto the startup and ending parts of
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These routines hook themselves onto parts of the main programme to
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the main programme. In order to use it, the main programme needs to
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enable the hardware threads to work properly.
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be compiled with optimisations turned on (at least -O1).
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*/
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*/
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#include "aemb/stack.hh"
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#include "aemb/stack.hh"
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#include "aemb/heap.hh"
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#include "aemb/heap.hh"
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#include "aemb/thread.hh"
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#include "aemb/thread.hh"
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#ifndef __OPTIMIZE__
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// ugly hack to check if optimisation is used.
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OPTIMISATION_REQUIRED XXX
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#endif
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#ifndef AEMB_HOOK_HH
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#ifndef AEMB_HOOK_HH
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#define AEMB_HOOK_HH
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#define AEMB_HOOK_HH
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namespace aemb {
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namespace aemb {
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//void hookProgramInit() asm ("_program_init"); // hook aliasing
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//void hookProgramClean() asm ("_program_clean"); // hook aliasing
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extern "C" void _program_init();
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extern "C" void _program_init();
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extern "C" void _program_clean();
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extern "C" void _program_clean();
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extern "C" void __malloc_lock();
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extern "C" void __malloc_unlock();
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extern "C" void __env_lock();
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extern "C" void __env_unlock();
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/**
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/**
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Finalisation hook
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Finalisation hook
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This function executes during the shutdown phase after the
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This function executes during the shutdown phase after the
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finalisation routine is called. It will merge the changes made
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finalisation routine is called. It will merge the changes made
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during initialisation.
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during initialisation.
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*/
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*/
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//void hookProgramClean()
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void _program_clean()
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void _program_clean()
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{
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{
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if (aemb::isThread1()) {
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// unify the stack backwards for thread 1
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// unify the stack backwards
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if (aemb::isThread1())
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aemb::setStack(aemb::getStack() +
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{
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(aemb::getStackSize() >> 1));
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aemb::setStack(aemb::getStack() + (aemb::getStackSize() >> 1));
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// FIXME: unify the heap
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}
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}
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}
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}
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/**
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/**
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Initialisation hook
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Initialisation hook
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This function executes during the startup phase before the
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This function executes during the startup phase before the
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initialisation routine is called. It splits the heap and stack
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initialisation routine is called. It splits the stack between the
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between the threads.
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threads.
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*/
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*/
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//void hookProgramInit()
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void _program_init()
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void _program_init()
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{
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{
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if (aemb::isThread1()) { // check if PHASE 1
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// split and shift the stack for thread 1
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// split and shift the stack
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if (aemb::isThread1())
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aemb::setStack(aemb::getStack() -
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{
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(aemb::getStackSize() >> 1));
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aemb::setStack(aemb::getStack() - (aemb::getStackSize() >> 1));
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}
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else
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{
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for(int i=0; i<10; ++i)
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{
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asm volatile ("nop"); // delay loop to offset thread 0
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}
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}
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}
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// FIXME: Implement with a single hardware mutex
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// FIXME: split and shift the heap
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semaphore __malloc_mutex(1); ///< private mutex
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/**
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Heap Lock
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This function is called during malloc() to lock out the shared
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heap to avoid data corruption.
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*/
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void __malloc_lock()
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{
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__malloc_mutex.wait();
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}
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/**
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Heap Unlock
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This function is called during malloc() to indicate that the
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shared heap is now available for another thread.
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*/
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void __malloc_unlock()
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{
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__malloc_mutex.signal();
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}
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}
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}
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}
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};
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#endif
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#endif
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#ifndef __OPTIMIZE__
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// The main programme needs to be compiled with optimisations turned
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// on (at least -O1).
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OPTIMISATION_REQUIRED XXX
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#endif
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/*
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/*
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$Log: not supported by cvs2svn $
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$Log: not supported by cvs2svn $
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Revision 1.2 2008/04/11 15:20:31 sybreon
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added static assert hack
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Revision 1.1 2008/04/09 19:48:37 sybreon
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Revision 1.1 2008/04/09 19:48:37 sybreon
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Added new C++ files
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Added new C++ files
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*/
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*/
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