var_cache.h

来自「eCos操作系统源码」· C头文件 代码 · 共 178 行

#ifndef CYGONCE_VAR_CACHE_H
#define CYGONCE_VAR_CACHE_H
//=============================================================================
//
//      var_cache.h
//
//      Variant 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
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// 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
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// 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
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// at http://sources.redhat.com/ecos/ecos-license/
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//####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   Bob Koninckx
// Contributors:Bob Koninckx
// Date:        2001-12-11
// Purpose:     Variant cache control API
// Description: The macros defined here provide the HAL APIs for handling
//              cache control operations on the MPC8xx variant CPUs.
// Usage:       Is included via the architecture cache header:
//              #include <cyg/hal/hal_cache.h>
//              ...
//
//####DESCRIPTIONEND####
//
//=============================================================================

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

#include <cyg/hal/ppc_regs.h>

#include <cyg/hal/plf_cache.h>


//-----------------------------------------------------------------------------
// MPC5xx has no data or instruction cache. This is going to be a relatively
// simple file

//-----------------------------------------------------------------------------
// Global control of data cache

// Enable the data cache
#define HAL_DCACHE_ENABLE()                     \
    CYG_MACRO_START                             \
    CYG_MACRO_END

// Disable the data cache
#define HAL_DCACHE_DISABLE()                    \
    CYG_MACRO_START                             \
    CYG_MACRO_END

// Invalidate the entire cache
#define HAL_DCACHE_INVALIDATE_ALL()             \
    CYG_MACRO_START                             \
    CYG_MACRO_END

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

// Query the state of the data cache
#define HAL_DCACHE_IS_ENABLED(_state_)          \
    CYG_MACRO_START                             \
    _state_ = 0;                                \
    CYG_MACRO_END

// Load the contents of the given address range into the data cache 
// and then lock the cache so that it stays there.  

//#define HAL_DCACHE_LOCK(_base_, _size_)
        
// Undo a previous lock operation
//#define HAL_DCACHE_UNLOCK(_base_, _size_)

// Unlock entire cache
//#define HAL_DCACHE_UNLOCK_ALL()


//-----------------------------------------------------------------------------
// Data cache line control

// Write dirty cache lines to memory and invalidate the cache entries
// for the given address range.
//#define HAL_DCACHE_FLUSH( _base_ , _size_ )
   
// Invalidate cache lines in the given range without writing to memory.
//#define HAL_DCACHE_INVALIDATE( _base_ , _size_ )

// Write dirty cache lines to memory for the given address range.
//#define HAL_DCACHE_STORE( _base_ , _size_ )

// Preread the given range into the cache with the intention of reading
// from it later.
//#define HAL_DCACHE_READ_HINT( _base_ , _size_ )

// Preread the given range into the cache with the intention of writing
// to it later.
//#define HAL_DCACHE_WRITE_HINT( _base_ , _size_ )

// Allocate and zero the cache lines associated with the given range.
//#define HAL_DCACHE_ZERO( _base_ , _size_ )

//-----------------------------------------------------------------------------
// Global control of Instruction cache

// Enable the instruction cache
#define HAL_ICACHE_ENABLE()                                     \
    CYG_MACRO_START                                             \
    CYG_MACRO_END

// Disable the instruction cache
#define HAL_ICACHE_DISABLE()                                    \
    CYG_MACRO_START                                             \
    CYG_MACRO_END

// Invalidate the entire cache
#define HAL_ICACHE_INVALIDATE_ALL()                             \
    CYG_MACRO_START                                             \
    CYG_MACRO_END

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

// Query the state of the instruction cache
#define HAL_ICACHE_IS_ENABLED(_state_)                          \
    CYG_MACRO_START                                             \
    _state_ = 0;                                                \
    CYG_MACRO_END

// Load the contents of the given address range into the instruction cache
// and then lock the cache so that it stays there.
//#define HAL_ICACHE_LOCK(_base_, _size_)

// Undo a previous lock operation
//#define HAL_ICACHE_UNLOCK(_base_, _size_)

// Unlock entire cache
//#define HAL_ICACHE_UNLOCK_ALL()

//-----------------------------------------------------------------------------
#endif // ifndef CYGONCE_VAR_CACHE_H
// End of var_cache.h