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skrzyp |
//==========================================================================
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//
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// sh_se7751_flash.c
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//
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// Flash programming for Fujitsu/AMD device on SH SE7751 board
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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): jskov
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// Contributors: jskov
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// Date: 2001-07-09
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// Purpose:
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// Description:
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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#include <cyg/infra/cyg_type.h>
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//--------------------------------------------------------------------------
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// Device properties
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#define CYGNUM_FLASH_INTERLEAVE (2)
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#define CYGNUM_FLASH_SERIES (1)
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#define CYGNUM_FLASH_WIDTH (16)
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#define CYGNUM_FLASH_BASE (plf_flash_base)
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static cyg_uint32 plf_flash_base;
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//--------------------------------------------------------------------------
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// Platform specific extras
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static void plf_flash_init(void);
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#define CYGHWR_FLASH_AM29XXXXX_PLF_INIT() plf_flash_init()
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//--------------------------------------------------------------------------
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// Now include the driver code.
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#include "cyg/io/flash_am29xxxxx.inl"
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//--------------------------------------------------------------------------
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// Magic to determine location of flash
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// This works by querying at the location where we expect the EPROM to
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// be. Then the returned data is compared with the data at that location.
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// If there's a match, assume that to be the location of the EPROM.
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// Otherwise it's at the other location.
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//
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// This is done to avoid having separate configurations for the two board
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// configurations. This is simple, has negligible overhead, and Just Works.
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void
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plf_flash_init(void)
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{
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flash_data_t id[2];
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flash_data_t* p;
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plf_flash_base = 0xa1000000;
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flash_dev_query(id);
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p = (flash_data_t*)0xa1000000;
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if (id[0] == *p++ && id[1] == *p)
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plf_flash_base = 0xa0000000;
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// Make that the cached region.
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plf_flash_base &= ~0x20000000;
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}
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// ------------------------------------------------------------------------
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// EOF sh_se7751_flash.c
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