| 1 |
27 |
unneback |
//==========================================================================
|
| 2 |
|
|
//
|
| 3 |
|
|
// flash_erase_block.c
|
| 4 |
|
|
//
|
| 5 |
|
|
// Flash programming
|
| 6 |
|
|
//
|
| 7 |
|
|
//==========================================================================
|
| 8 |
|
|
//####ECOSGPLCOPYRIGHTBEGIN####
|
| 9 |
|
|
// -------------------------------------------
|
| 10 |
|
|
// This file is part of eCos, the Embedded Configurable Operating System.
|
| 11 |
|
|
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
|
| 12 |
|
|
//
|
| 13 |
|
|
// eCos is free software; you can redistribute it and/or modify it under
|
| 14 |
|
|
// the terms of the GNU General Public License as published by the Free
|
| 15 |
|
|
// Software Foundation; either version 2 or (at your option) any later version.
|
| 16 |
|
|
//
|
| 17 |
|
|
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
|
| 18 |
|
|
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 19 |
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
| 20 |
|
|
// for more details.
|
| 21 |
|
|
//
|
| 22 |
|
|
// You should have received a copy of the GNU General Public License along
|
| 23 |
|
|
// with eCos; if not, write to the Free Software Foundation, Inc.,
|
| 24 |
|
|
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
| 25 |
|
|
//
|
| 26 |
|
|
// As a special exception, if other files instantiate templates or use macros
|
| 27 |
|
|
// or inline functions from this file, or you compile this file and link it
|
| 28 |
|
|
// with other works to produce a work based on this file, this file does not
|
| 29 |
|
|
// by itself cause the resulting work to be covered by the GNU General Public
|
| 30 |
|
|
// License. However the source code for this file must still be made available
|
| 31 |
|
|
// in accordance with section (3) of the GNU General Public License.
|
| 32 |
|
|
//
|
| 33 |
|
|
// This exception does not invalidate any other reasons why a work based on
|
| 34 |
|
|
// this file might be covered by the GNU General Public License.
|
| 35 |
|
|
//
|
| 36 |
|
|
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
|
| 37 |
|
|
// at http://sources.redhat.com/ecos/ecos-license/
|
| 38 |
|
|
// -------------------------------------------
|
| 39 |
|
|
//####ECOSGPLCOPYRIGHTEND####
|
| 40 |
|
|
//==========================================================================
|
| 41 |
|
|
//#####DESCRIPTIONBEGIN####
|
| 42 |
|
|
//
|
| 43 |
|
|
// Author(s): gthomas
|
| 44 |
|
|
// Contributors: gthomas, dmoseley
|
| 45 |
|
|
// Date: 2000-07-14
|
| 46 |
|
|
// Purpose:
|
| 47 |
|
|
// Description:
|
| 48 |
|
|
//
|
| 49 |
|
|
//####DESCRIPTIONEND####
|
| 50 |
|
|
//
|
| 51 |
|
|
//==========================================================================
|
| 52 |
|
|
|
| 53 |
|
|
#include "flash.h"
|
| 54 |
|
|
|
| 55 |
|
|
#include <pkgconf/hal.h>
|
| 56 |
|
|
#include <cyg/hal/hal_arch.h>
|
| 57 |
|
|
#include <cyg/hal/hal_cache.h>
|
| 58 |
|
|
|
| 59 |
|
|
//
|
| 60 |
|
|
// CAUTION! This code must be copied to RAM before execution. Therefore,
|
| 61 |
|
|
// it must not contain any code which might be position dependent!
|
| 62 |
|
|
//
|
| 63 |
|
|
|
| 64 |
|
|
int
|
| 65 |
|
|
flash_erase_block(volatile unsigned long *block)
|
| 66 |
|
|
{
|
| 67 |
|
|
unsigned long stat;
|
| 68 |
|
|
int timeout = 5000000;
|
| 69 |
|
|
int cache_on;
|
| 70 |
|
|
|
| 71 |
|
|
HAL_DCACHE_IS_ENABLED(cache_on);
|
| 72 |
|
|
if (cache_on) {
|
| 73 |
|
|
HAL_DCACHE_SYNC();
|
| 74 |
|
|
HAL_DCACHE_DISABLE();
|
| 75 |
|
|
}
|
| 76 |
|
|
|
| 77 |
|
|
// Clear any error conditions
|
| 78 |
|
|
*block = FLASH_Clear_Status;
|
| 79 |
|
|
|
| 80 |
|
|
// Set to erase
|
| 81 |
|
|
*block = FLASH_Block_Erase;
|
| 82 |
|
|
*block = FLASH_Confirm;
|
| 83 |
|
|
while(((stat = *block) & FLASH_Status_Ready) != FLASH_Status_Ready) {
|
| 84 |
|
|
if (--timeout == 0) break;
|
| 85 |
|
|
}
|
| 86 |
|
|
|
| 87 |
|
|
// Restore ROM to "normal" mode
|
| 88 |
|
|
*block = FLASH_Reset;
|
| 89 |
|
|
|
| 90 |
|
|
if (cache_on) {
|
| 91 |
|
|
HAL_DCACHE_ENABLE();
|
| 92 |
|
|
}
|
| 93 |
|
|
|
| 94 |
|
|
return stat;
|
| 95 |
|
|
}
|
