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skrzyp |
#ifndef CYGONCE_PLF_CACHE_H
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#define CYGONCE_PLF_CACHE_H
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//=============================================================================
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//
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// plf_cache.h
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//
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// Platform HAL cache details
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//
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//=============================================================================
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// ####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public License.
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// -------------------------------------------
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// ####ECOSGPLCOPYRIGHTEND####
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//=============================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): Piotr Skrzypek
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// Contributors:
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// Date: 2012-04-02
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// Purpose: Platform cache control API
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// Description: The macros defined here provide the platform specific
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// cache control operations / behavior.
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// Usage: Is included via the architecture cache header:
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// #include <cyg/hal/hal_cache.h>
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//
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//####DESCRIPTIONEND####
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//
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//=============================================================================
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//-----------------------------------------------------------------------------
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// Data Cache dimensions
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//
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// Size of the data cache can be adjusted in the configuration file.
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#define HAL_DCACHE_SIZE CYGHWR_DCACHE_SIZE
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//
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// Default line size is 16 bytes. Only 32KB cache has line size of 32 bytes.
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#if CYGHWR_DCACHE_SIZE == 0x8000
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#define HAL_DCACHE_LINE_SIZE 32
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#else
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#define HAL_DCACHE_LINE_SIZE 16
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#endif
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//
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// Currently only 1 way cache is implemented.
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#define HAL_DCACHE_WAYS 1
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//
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// Cache mode (write-through / write-back) can be selected in the configuration
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// file. Default mode is write-through. Cache mode is selected at synthesis
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// time and cannot be configured by the software.
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#if defined(CYGHWR_DCACHE_MODE_WRITETHROUGH)
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#define HAL_DCACHE_MODE_WRITETHROUGH
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#elif defined(CYGHWR_DCACHE_MODE_WRITEBACK)
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#define HAL_DCACHE_MODE_WRITEBACK
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#else
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#error Unsupported cache mode
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#endif
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//
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// Compute the number of sets based on previous values
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#define HAL_DCACHE_SETS (HAL_DCACHE_SIZE/(HAL_DCACHE_LINE_SIZE*HAL_DCACHE_WAYS))
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//-----------------------------------------------------------------------------
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// Instruction Cache dimensions
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//
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// Size of the instruction cache can be adjusted in the configuration file.
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#define HAL_ICACHE_SIZE CYGHWR_ICACHE_SIZE
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//
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// Default line size is 16 bytes. Only 32KB cache has line size of 32 bytes.
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#if CYGHWR_ICACHE_SIZE == 0x8000
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#define HAL_ICACHE_LINE_SIZE 32
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#else
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#define HAL_ICACHE_LINE_SIZE 16
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#endif
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//
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// Currently only 1 way cache is implemented.
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#define HAL_ICACHE_WAYS 1
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//
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// Compute the number of sets based on previous values
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#define HAL_ICACHE_SETS (HAL_ICACHE_SIZE/(HAL_ICACHE_LINE_SIZE*HAL_ICACHE_WAYS))
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#endif // ifndef CYGONCE_PLF_CACHE_H
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// End of plf_cache.h
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