1 //==========================================================================
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.
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.
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
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.
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.
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.
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####
43 // Author(s): andrew.lunn@ascom.ch
44 // Contributors: andrew.lunn
49 //####DESCRIPTIONEND####
51 //==========================================================================
55 #include <cyg/hal/hal_io.h>
56 #include <pkgconf/devs_flash_synth.h>
57 #include <cyg/infra/cyg_ass.h>
58 #include <cyg/io/flash.h>
59 #include <string.h> // memset
61 /* This helps speed up the erase. */
62 static char empty[4096];
63 static cyg_bool empty_inited = false;
65 int flash_erase_block(volatile flash_t *block, unsigned int block_size)
68 int offset = (int)block;
69 offset -= (int)cyg_dev_flash_synth_base;
71 cyg_hal_sys_lseek(cyg_dev_flash_synth_flashfd, offset,
72 CYG_HAL_SYS_SEEK_SET);
75 memset(empty, 0xff, sizeof(empty));
79 CYG_ASSERT(sizeof(empty) < block_size,
80 "Eckk! Can't work with such small blocks");
81 CYG_ASSERT((block_size % sizeof(empty)) == 0,
82 "Eckk! Can't work with that odd size block");
84 for (i=0; (i * sizeof(empty)) < block_size; i++) {
85 cyg_hal_sys_write(cyg_dev_flash_synth_flashfd, empty, sizeof(empty));