//==========================================================================
//
//      flash_erase_block.c
//
//      Flash programming
//
//==========================================================================
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// -------------------------------------------                              
// 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    
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// for more details.                                                        
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// You should have received a copy of the GNU General Public License        
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//
// As a special exception, if other files instantiate templates or use      
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// ####ECOSGPLCOPYRIGHTEND####                                              
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    gthomas
// Contributors: gthomas
// Date:         2000-07-14
// Purpose:      
// Description:  
//              
//####DESCRIPTIONEND####
//
//==========================================================================

#include "flash.h"

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

int
flash_erase_block(volatile unsigned long *block) 
	__attribute__ ((section (".2ram.flash_erase_block")));
int
flash_erase_block(volatile unsigned long *block)
{
    unsigned long stat;
    int timeout = 5000000;    

    // Clear any error conditions
    *block = FLASH_Clear_Status;

    // Set to erase
    *block = FLASH_Block_Erase;
    *block = FLASH_Confirm;
    while(((stat = *block) & FLASH_Status_Ready) != FLASH_Status_Ready) {
        if (--timeout == 0) break;
    }

    // Restore ROM to "normal" mode
    *block = FLASH_Reset;

    return stat;
}
