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//==========================================================================
//
// flash_erase_block.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): andrew.lunn@ascom.ch
// Contributors: andrew.lunn
// Date: 2001-10-30
// Purpose:
// Description:
//
//####DESCRIPTIONEND####
//
//==========================================================================
#include "synth.h"
#include <cyg/hal/hal_io.h>
#include <pkgconf/devs_flash_synth.h>
#include <cyg/infra/cyg_ass.h>
#include <cyg/io/flash.h>
#include <cyg/io/flash_dev.h>
#include <string.h> // memset
#ifndef MIN
#define MIN(x,y) ((x)<(y) ? (x) : (y))
#endif
int flash_erase_block(volatile flash_t *block, unsigned int block_size)
{
unsigned int offset = (unsigned int) block;
size_t remaining;
int write_size;
// This helps speed up the erasing
static cyg_uint8 empty[4096];
static cyg_bool empty_inited;
offset -= (unsigned int) cyg_dev_flash_synth_base;
cyg_hal_sys_lseek(cyg_dev_flash_synth_flashfd, offset,
CYG_HAL_SYS_SEEK_SET);
if (!empty_inited) {
memset(empty, 0xff, sizeof(empty));
empty_inited = true;
}
remaining = flash_info.block_size;
while (remaining) {
write_size = MIN(remaining, sizeof(empty));
cyg_hal_sys_write(cyg_dev_flash_synth_flashfd, empty, write_size);
remaining -= write_size;
}
return FLASH_ERR_OK;
}
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