/*---------------------------------------------------------------------------*
  Project:  CtrBrom - MI
  File:     mi_exclusive.c

  Copyright 2009 Nintendo.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Date::            $
  $Rev$
  $Author$
 *---------------------------------------------------------------------------*/
#include <brom/mi/exclusive.h>


//  miSwap* will be used for control common resource exclusively among processers
//  or modules. Beside, it's used for realization spin lock system.
//
//  notice: you cannot access main memory by byte unless via cache.
//  so, use miSwapByte generally for accessing main memory ,not miSwapWord.


//---- This code will be compiled in ARM-Mode
#include <brom/code32.h>

/*---------------------------------------------------------------------------*
  Name:         miSwapByte

  Description:  swap data and memory

  Arguments:    setData      data to swap
                destp        memory address to swap

  Returns:      swapped memory data
 *---------------------------------------------------------------------------*/
asm u8  miSwapByte( register u32 setData, register vu8* destp )
{
        swpb    r0, r0, [r1]
        bx      lr
}

/*---------------------------------------------------------------------------*
  Name:         miSwapWord

  Description:  swap data and memory

  Arguments:    setData      data to swap
                destp        memory address to swap

  Returns:      swapped memory data
 *---------------------------------------------------------------------------*/
asm u32 miSwapWord( register u32 setData, register vu32* destp )
{
        swp     r0, r0, [r1]
        bx      lr
}

//---- end limitation of ARM-Mode
#include <brom/codereset.h>