hal_cache.h

ecos移植到R8H系列的源码。源码包来自http://www.cetoni.de/develop/develop_ecosh8s_en.html

#ifndef CYGONCE_HAL_CACHE_H
#define CYGONCE_HAL_CACHE_H

//=============================================================================
//
//      hal_cache.h
//
//      HAL cache control API
//
//=============================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos 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 2 or (at your option) any later version.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    yoshinori sato
// Contributors: yoshinori sato, Uwe Kindler
// Date:        2003-12-06
// Purpose:     Cache control API
// Description: The macros defined here provide the HAL APIs for handling
//              cache control operations.
// Usage:
//              #include <cyg/hal/hal_cache.h>
//              ...
//              
//
//####DESCRIPTIONEND####
//
//=============================================================================


//=============================================================================
//                            DOXYGEN FILE HEADER
/// \file    hal_cache.h
/// \brief   HAL cache control API
/// \author  Yoshinori Sato, Uwe Kindler
/// \date    2003-12-06
///
/// The macros defined here provide the HAL APIs for handling cache control 
/// operations
///
/// Usage:   #include <cyg/hal/hal_cache.h>
//============================================================================


//=============================================================================
//                                  INCLUDES
//=============================================================================
#include <pkgconf/hal.h>
#include <cyg/infra/cyg_type.h>


//=============================================================================
//                        GLOBAL CONTROL OF CACHE DATA
// DESCRIPTION:
//     The H8S 2674 does not contain any cache but we have to dedfine some
//     macros in order to enable eCoa build without errors.
//=============================================================================
// Enable the data cache
#define HAL_DCACHE_ENABLE()

// Disable the data cache
#define HAL_DCACHE_DISABLE()

// Invalidate the entire cache
#define HAL_DCACHE_INVALIDATE_ALL()

// Synchronize the contents of the cache with memory.
#define HAL_DCACHE_SYNC()


//=============================================================================
//                       GLOBAL CONTROL OF INSTRUCTION CACHE
// DESCRIPTION:
//     The H8S 2674 does not contain any cache but we have to dedfine some
//     macros in order to enable eCos build without errors.
//=============================================================================
// Enable the instruction cache
#define HAL_ICACHE_ENABLE()

// Disable the instruction cache
#define HAL_ICACHE_DISABLE()

// Invalidate the entire cache
#define HAL_ICACHE_INVALIDATE_ALL()

// Synchronize the contents of the cache with memory.
#define HAL_ICACHE_SYNC()


//=============================================================================
//                       CACHE CONTROL FOR FLASH I/O
// DESCRIPTION:
//     These two macros are required for flash programming. The H8S/2674 does
//     not contain any cache but these two macros are required for eCos in
//     order to build without any errors;
//
// NOTES:
//     We have to provide (_d_) = (_i_) in order to prevent compiler warnings. 
//=============================================================================
#define HAL_FLASH_CACHES_OFF(_d_, _i_) (_d_) = (_i_)

#define HAL_FLASH_CACHES_ON(_d_, _i_) (_d_) = (_i_)

//-----------------------------------------------------------------------------
#endif // End of hal_cache.h