#ifndef CYGONCE_HAL_CACHE_H
#define CYGONCE_HAL_CACHE_H

//=============================================================================
//
//      hal_cache.h
//
//      HAL cache control API
//
//=============================================================================
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//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    jlarmour
// Contributors: 
// Date:         2004-07-23
// Purpose:      Cache control API
// Description:  The macros defined here provide the HAL APIs for handling
//               cache control operations.
//
//               For the Philips LPC2xxx, these are empty macros as there
//               is no cache.
// Usage:
//               #include <cyg/hal/hal_cache.h>
//               ...
//              
//
//####DESCRIPTIONEND####
//
//=============================================================================

#include <cyg/infra/cyg_type.h>

//-----------------------------------------------------------------------------
// Cache dimensions

// Data cache
//#define HAL_DCACHE_SIZE                 0    // Size of data cache in bytes
//#define HAL_DCACHE_LINE_SIZE            0    // Size of a data cache line
//#define HAL_DCACHE_WAYS                 0    // Associativity of the cache

// Instruction cache
//#define HAL_ICACHE_SIZE                 0    // Size of cache in bytes
//#define HAL_ICACHE_LINE_SIZE            0    // Size of a cache line
//#define HAL_ICACHE_WAYS                 0    // Associativity of the cache

//#define HAL_DCACHE_SETS (HAL_DCACHE_SIZE/(HAL_DCACHE_LINE_SIZE*HAL_DCACHE_WAYS))
//#define HAL_ICACHE_SETS (HAL_ICACHE_SIZE/(HAL_ICACHE_LINE_SIZE*HAL_ICACHE_WAYS))

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

// 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()

// Purge contents of data cache
#define HAL_DCACHE_PURGE_ALL()

// Query the state of the data cache (does not affect the caching)
#define HAL_DCACHE_IS_ENABLED(_state_)          \
    CYG_MACRO_START                             \
    (_state_) = 0;                              \
    CYG_MACRO_END

// Set the data cache refill burst size
//#define HAL_DCACHE_BURST_SIZE(_size_)

// Set the data cache write mode
//#define HAL_DCACHE_WRITE_MODE( _mode_ )

//#define HAL_DCACHE_WRITETHRU_MODE       0
//#define HAL_DCACHE_WRITEBACK_MODE       1

// 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

// Allocate cache lines for the given address range without reading its
// contents from memory.
//#define HAL_DCACHE_ALLOCATE( _base_ , _size_ )

// 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()

// 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()

// Query the state of the instruction cache (does not affect the caching)
#define HAL_ICACHE_IS_ENABLED(_state_)          \
    CYG_MACRO_START                             \
    (_state_) = 0;                              \
    CYG_MACRO_END

// Set the instruction cache refill burst size
//#define HAL_ICACHE_BURST_SIZE(_size_)

// 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()

//-----------------------------------------------------------------------------
// Instruction cache line control

// Invalidate cache lines in the given range without writing to memory.
//#define HAL_ICACHE_INVALIDATE( _base_ , _size_ )

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