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[/] [aemb/] [trunk/] [sw/] [cc/] [aemb/] [stack.hh] - Blame information for rev 121

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/* $Id: stack.hh,v 1.2 2008-04-20 16:35:53 sybreon Exp $
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**
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** AEMB2 HI-PERFORMANCE CPU
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** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap 
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**
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** This file is part of AEMB.
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**
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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 Lesser General Public License as
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** published by the Free Software Foundation, either version 3 of the
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** License, or (at your option) any later version.
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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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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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** or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
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** Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public
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** License along with AEMB. If not, see .
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*/
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/**
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   Basic stack related functions
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   @file stack.hh
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 */
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#ifndef AEMB_STACK_HH
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#define AEMB_STACK_HH
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#ifdef __cplusplus
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namespace aemb {
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#endif
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  /**
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  Reads the size of the memory space allocated for the stack in bytes.
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  @return size of stack
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  */
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  inline int getStackSize()
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  {
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    int tmp;
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    asm ("la %0, r0, _STACK_SIZE":"=r"(tmp));
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    return tmp;
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  }
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  /**
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  Reads the end of the memory space allocated for the stack.
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  @return end of stack
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  */
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  inline int getStackEnd()
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  {
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    int tmp;
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    asm ("la %0, r0, _stack_end":"=r"(tmp));
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    return tmp;
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  }
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  /**
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  Reads the top of the memory space allocated for the stack.
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  @return top of stack
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  */
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  inline int getStackTop()
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  {
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    int tmp;
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    asm ("la %0, r0, _stack":"=r"(tmp));
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    return tmp;
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  }
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  /**
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  Reads register R1 which is the designated stack pointer.
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  @return stack pointer
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  */
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  inline int getStack()
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  {
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    int tmp;
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    asm ("or %0, r0, r1":"=r"(tmp));
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    return tmp;
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  }
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  /**
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  Sets register R1 to the new stack pointer.
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  @param stk new stack pointer
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  */
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  inline void setStack(int stk)
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  {
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    asm ("or r1, r0, %0"::"r"(stk));
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  }
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#ifdef __cplusplus
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}
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#endif
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#endif
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/*
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  $Log: not supported by cvs2svn $
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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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*/

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