Subversion Repositories aemb

/* $Id: stack.hh,v 1.1 2008-04-09 19:48:37 sybreon Exp $

**

** AEMB2 HI-PERFORMANCE CPU

** Copyright (C) 2004-2007 Shawn Tan Ser Ngiap 

**

** This file is part of AEMB.

**

** AEMB is free software: you can redistribute it and/or modify it

** under the terms of the GNU Lesser 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 Lesser General

** Public License for more details.

**

** You should have received a copy of the GNU Lesser General Public

** License along with AEMB. If not, see .

*/

/**

   Basic stack related functions

   @file stack.hh

 */

#ifndef AEMB_STACK_HH

#define AEMB_STACK_HH

namespace aemb {

  /**

  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.

  @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.

  @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 ("or %0, r0, r1":"=r"(tmp));

    return tmp;

  }

  /**

  Sets register R1 to the new stack pointer.

  @param stk new stack pointer

  */

  inline void setStack(int stk)

  {

    asm ("or r1, r0, %0"::"r"(stk));

  }

}

#endif

/*

  $Log: not supported by cvs2svn $

*/