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/* $Id: stack.hh,v 1.7 2008-04-27 16:33:42 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 stack related functions
@file stack.hh
*/
#ifndef AEMB_STACK_HH
#define AEMB_STACK_HH
#ifdef __cplusplus
namespace aemb {
#endif
/**
Reads the size of the memory space allocated for the stack in bytes.
@return size of stack
*/
inline int getStackSize()
{
int tmp;
asm ("la %0, r0, _STACK_SIZE":"=r"(tmp));
return tmp;
}
/**
Reads the end of the memory space allocated for the stack. This is
where the stack ends.
@return end of stack
*/
inline int getStackEnd()
{
int tmp;
asm ("la %0, r0, _stack_end":"=r"(tmp));
return tmp;
}
/**
Reads the top of the memory space allocated for the stack. This is
where the stack starts.
@return top of stack
*/
inline int getStackTop()
{
int tmp;
asm ("la %0, r0, _stack":"=r"(tmp));
return tmp;
}
/**
Reads register R1 which is the designated stack pointer.
@return stack pointer
*/
inline int getStack()
{
int tmp;
asm ("addk %0, r0, r1":"=r"(tmp));
return tmp;
}
/**
Sets register R1 to the new stack pointer.
@param stk new stack pointer
@return new stack pointer
*/
inline int setStack(int stk)
{
asm ("addk r1, r0, %0"::"r"(stk));
return stk;
}
/**
Duplicates the stack
@param newp new stack pointer
@param oldp old stack pointer
@param endp end of the stack
*/
inline void dupStack(unsigned int *newp, unsigned int *oldp, unsigned int *endp)
{
while (oldp < endp)
{
// copy the stack content
*newp = *oldp;
// this increments 1 word (not 1 byte)
newp++;
oldp++;
}
}
#ifdef __cplusplus
}
#endif
#endif
/*
$Log: not supported by cvs2svn $
Revision 1.6 2008/04/27 16:04:42 sybreon
Minor cosmetic changes.
Revision 1.5 2008/04/26 19:31:35 sybreon
Made headers C compatible.
Revision 1.4 2008/04/26 18:04:31 sybreon
Updated software to freeze T0 and run T1.
Revision 1.3 2008/04/23 14:19:39 sybreon
Fixed minor bugs.
Initial use of hardware mutex.
Revision 1.2 2008/04/20 16:35:53 sybreon
Added C/C++ compatible #ifdef statements
Revision 1.1 2008/04/09 19:48:37 sybreon
Added new C++ files
*/
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