//==========================================================================
//
//      ixp425_redboot.c
//
//      RedBoot board support code for Intel IXP425 Network Processor
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 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   
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// 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):    msalter
// Contributors: msalter
// Date:         2004-08-30
// Purpose:      RedBoot board-specific support
// Description:  Implementations of board-specic RedBoot support.
//
//####DESCRIPTIONEND####
//
//========================================================================*/

#include <redboot.h>
#ifdef CYGPKG_IO_FLASH
#include <cyg/io/flash.h>
#endif

#ifdef CYGOPT_REDBOOT_FIS
extern void *fis_addr;
#endif

#ifdef CYGSEM_REDBOOT_FLASH_CONFIG
extern void *cfg_base;
#endif

#ifdef CYGPKG_IO_FLASH

//
// Little endian mode requires some trickery due to the way the IXP4xx
// AHB and expansion busses work.
//
int
hal_flash_read(void *addr, void *data, int len, void **err)
{
    int retval;

    retval = flash_read(addr, data, len, err);

    if (0
#if (CYG_BYTEORDER == CYG_LSBFIRST) && defined(CYGOPT_REDBOOT_FLASH_BYTEORDER_MSBFIRST)
#ifdef CYGOPT_REDBOOT_FIS
	|| addr == fis_addr
#endif
#ifdef CYGSEM_REDBOOT_FLASH_CONFIG
	|| addr == cfg_base
#endif
#endif
	) {
	cyg_uint32 *p;
	int i;

	for (i = 0, p = data; i < len; i += 4, ++p)
	    *p = CYG_SWAP32(*p);
    }
    return retval;
}

// Try to figure out if RedBoot is re-flashing a RedBoot with
// a different endianess. This is obviously not foolproof, but
// should be good enough.
static inline int
is_swabbed_redboot(void *faddr, cyg_uint32 *p)
{
    if (faddr == (void *)0x50000000
	    && (CYG_SWAP32(p[1]) == 0xe59ff018)
	    && (CYG_SWAP32(p[2]) == 0xe59ff018)
	    && (CYG_SWAP32(p[3]) == 0xe59ff018)
	    && (CYG_SWAP32(p[4]) == 0xe59ff018)
	    && (p[5] == 0))
	return 1;
    return 0;
}

int
hal_flash_program(void *addr, void *data, int len, void **err)
{
    int swabbed = 0;
    cyg_uint32 *p;
    int i, retval;

    if (is_swabbed_redboot(addr, data)
#if (CYG_BYTEORDER == CYG_LSBFIRST) && defined(CYGOPT_REDBOOT_FLASH_BYTEORDER_MSBFIRST)
#ifdef CYGOPT_REDBOOT_FIS
	|| addr == fis_addr
#endif
#ifdef CYGSEM_REDBOOT_FLASH_CONFIG
	|| addr == cfg_base
#endif
#endif
	) {
	swabbed = 1;
	for (i = 0, p = data; i < len; i += 4, ++p)
	    *p = CYG_SWAP32(*p);
    }

    retval = flash_program(addr, data, len, err);

    if (swabbed) {
	for (i = 0, p = data; i < len; i += 4, ++p)
	    *p = CYG_SWAP32(*p);
    }

    return retval;
}

#endif // CYGPKG_IO_FLASH


/*------------------------------------------------------------------------*/
// EOF ixp425_redboot.c

