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//==========================================================================
//
// flash_query.c
//
// Flash programming - query device
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): gthomas, hmt
// Contributors: gthomas
// Date: 2001-02-14
// Purpose:
// Description:
//
//####DESCRIPTIONEND####
//
//==========================================================================
#include "strata.h"
#include <pkgconf/hal.h>
#include <cyg/hal/hal_arch.h>
#include CYGHWR_MEMORY_LAYOUT_H
// Platforms may define this for special handling when accessing the query data.
#ifndef CYGHWR_FLASH_READ_QUERY
#define CYGHWR_FLASH_READ_QUERY(a) (*(a))
#endif
#define CNT 20*1000*10 // Approx 20ms
int
flash_query(unsigned char *data) __attribute__ ((section (".2ram.flash_query")));
int
flash_query(unsigned char *data)
{
volatile flash_t *ROM, *p, dummy;
int i, cnt;
// Get base address and map addresses to virtual addresses
ROM = FLASH_P2V( CYGNUM_FLASH_BASE );
#ifdef CYGOPT_FLASH_IS_BOOTBLOCK
// BootBlock flash does not support full Read_Query - we have do a
// table oriented thing above, after getting just two bytes of results:
ROM[0] = FLASH_Read_ID;
i = 2;
#else
// StrataFlash supports the full Read_Query op:
ROM[0] = FLASH_Read_Query;
i = sizeof(struct FLASH_query);
#endif // Not CYGOPT_FLASH_IS_BOOTBLOCK
for (cnt = CNT; cnt > 0; cnt--) ;
p = ROM;
while ( i--) {
// It is very deliberate that data is chars NOT flash_t:
// The info comes out in bytes regardless of device.
*data++ = (unsigned char) CYGHWR_FLASH_READ_QUERY(p++);
#ifndef CYGOPT_FLASH_IS_BOOTBLOCK
# if 8 == CYGNUM_FLASH_WIDTH
// strata flash with 'byte-enable' contains the configuration data
// at even addresses
++p;
# endif
#endif
}
// Reset the flash to array mode. The dummy read is required on MIPS
// platforms (don't know about others) to force the write out. Should
// there be direct HAL support for this kind of operation?
ROM[0] = FLASH_Reset;
dummy = ROM[0];
return 0;
}
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