//==========================================================================
//
//      edb7xxx_flash.c
//
//      Flash programming
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002 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
// Contributors: gthomas
// Date:         2000-07-26
// Purpose:      
// Description:  
//              
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/hal.h>
#include <cyg/hal/hal_arch.h>

#include <cyg/io/flash.h>
#include <cyg/io/flash_dev.h>

#include "flash.h"

#define _si(p) ((p[0]<<8)|p[1])

int
flash_hwr_init(void)
{
    unsigned short data[4];
    int num_regions, region_size;

#if 0
    {
    volatile int cache_test;
    volatile int *cp = 0xE0000000;
    // See if the data cache is working
    *cp = 0x12345678;
    (*flash_info.pf)("ROM cache:\n");
    (*flash_info.pf)("cache test = %x\n", *cp);
    HAL_DCACHE_INVALIDATE_ALL();
    HAL_DCACHE_DISABLE();
    (*flash_info.pf)("cache test = %x\n", *cp);
    *cp = 0xDEADDEAD;
    (*flash_info.pf)("cache test = %x\n", *cp);
    HAL_DCACHE_ENABLE();
    (*flash_info.pf)("cache test = %x\n", *cp);
    cp = 0x00100000;
    // See if the data cache is working
    *cp = 0x12345678;
    (*flash_info.pf)("RAM cache:\n");
    (*flash_info.pf)("cache test = %x\n", *cp);
    HAL_DCACHE_DISABLE();
    (*flash_info.pf)("cache test = %x\n", *cp);
    *cp = 0xDEADDEAD;
    (*flash_info.pf)("cache test = %x\n", *cp);
    HAL_DCACHE_ENABLE();
    (*flash_info.pf)("cache test = %x\n", *cp);
    }
#endif

    flash_dev_query(data);
#if 0
    dump_buf(data, sizeof(data));
#endif

#if 0
    {
    volatile int cache_test;
    volatile int *cp = 0xE0000000;
    // See if the data cache is working
    (*flash_info.pf)("cache test = %x\n", *cp);
    *cp = 0x56781234;
    (*flash_info.pf)("cache test = %x\n", *cp);
    HAL_DCACHE_INVALIDATE_ALL();
    HAL_DCACHE_DISABLE();
    (*flash_info.pf)("cache test = %x\n", *cp);
    *cp = 0xDEADDEAD;
    (*flash_info.pf)("cache test = %x\n", *cp);
    HAL_DCACHE_ENABLE();
    (*flash_info.pf)("cache test = %x\n", *cp);
    }
#endif

    if (data[0] != FLASH_Intel_code) {
        (*flash_info.pf)("Not Intel = %x\n", data[0]);
        return FLASH_ERR_HWR;
    }

    if (data[1] == (unsigned short)0x8897) {
        num_regions = 64*2;
        region_size = 0x20000;
    } else {
        (*flash_info.pf)("Unknown device type: %x\n", data[1]);
        return FLASH_ERR_HWR;
    }

    // Hard wired for now
    flash_info.block_size = region_size;
    flash_info.blocks = num_regions;
    flash_info.start = (void *)0xE0000000;
    flash_info.end = (void *)(0xE0000000+(num_regions*region_size));
    return FLASH_ERR_OK;
}

// Map a hardware status to a package error
int
flash_hwr_map_error(int err)
{
    if (err & 0x007E007E) {
        (*flash_info.pf)("Err = %x\n", err);
        if (err & 0x00100010) {
            return FLASH_ERR_PROGRAM;
        } else 
        if (err & 0x00200020) {
            return FLASH_ERR_ERASE;
        } else 
        return FLASH_ERR_HWR;  // FIXME
    } else {
        return FLASH_ERR_OK;
    }
}

// See if a range of FLASH addresses overlaps currently running code
bool
flash_code_overlaps(void *start, void *end)
{
    extern char _stext[], _etext[];

    return ((((unsigned long)&_stext >= (unsigned long)start) &&
             ((unsigned long)&_stext < (unsigned long)end)) ||
            (((unsigned long)&_etext >= (unsigned long)start) &&
             ((unsigned long)&_etext < (unsigned long)end)));
}
