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annotate packages/devs/flash/synth/current/src/flash_erase_block.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 353a011b23b8
children d2c90368aeef
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1 //==========================================================================
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2 //
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3 // flash_erase_block.c
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4 //
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5 // Flash programming
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6 //
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7 //==========================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): andrew.lunn@ascom.ch
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44 // Contributors: andrew.lunn
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45 // Date: 2001-10-30
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46 // Purpose:
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47 // Description:
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //==========================================================================
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52
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53 #include "synth.h"
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54
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55 #include <cyg/hal/hal_io.h>
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56 #include <pkgconf/devs_flash_synth.h>
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57 #include <cyg/infra/cyg_ass.h>
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58 #include <cyg/io/flash.h>
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59 #include <string.h> // memset
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60
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61 /* This helps speed up the erase. */
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62 static char empty[4096];
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63 static cyg_bool empty_inited = false;
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64
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65 int flash_erase_block(volatile flash_t *block, unsigned int block_size)
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66 {
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67 int i;
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68 int offset = (int)block;
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69 offset -= (int)cyg_dev_flash_synth_base;
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70
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71 cyg_hal_sys_lseek(cyg_dev_flash_synth_flashfd, offset,
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72 CYG_HAL_SYS_SEEK_SET);
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73
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74 if (!empty_inited) {
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75 memset(empty, 0xff, sizeof(empty));
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76 empty_inited = true;
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77 }
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78
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79 CYG_ASSERT(sizeof(empty) < block_size,
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80 "Eckk! Can't work with such small blocks");
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81 CYG_ASSERT((block_size % sizeof(empty)) == 0,
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82 "Eckk! Can't work with that odd size block");
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83
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84 for (i=0; (i * sizeof(empty)) < block_size; i++) {
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85 cyg_hal_sys_write(cyg_dev_flash_synth_flashfd, empty, sizeof(empty));
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86 }
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87 return FLASH_ERR_OK;
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88 }
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89
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