hal_cache.h

eCos操作系统源码

#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):   nickg
// Contributors:proven,bartv
// Date:        1998-10-29
// 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####
//
//=============================================================================

// ----------------------------------------------------------------------------
// The synthetic target does not have a cache. The underlying hardware
// is quite likely to have a cache, but the synthetic target code has
// no way of manipulating it. A minimal set of no-op #define's is
// required.

#include <cyg/infra/cyg_type.h>

#define HAL_ICACHE_ENABLE()
#define HAL_ICACHE_DISABLE()
#define HAL_ICACHE_SYNC()
#define HAL_ICACHE_INVALIDATE_ALL()
#define HAL_ICACHE_IS_ENABLED(_state_)          \
    CYG_MACRO_START                             \
    (_state_) = 0;                              \
    CYG_MACRO_END

#define HAL_DCACHE_ENABLE()
#define HAL_DCACHE_DISABLE()
#define HAL_DCACHE_SYNC()
#define HAL_DCACHE_INVALIDATE_ALL()
#define HAL_DCACHE_IS_ENABLED(_state_)          \
    CYG_MACRO_START                             \
    (_state_) = 0;                              \
    CYG_MACRO_END

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