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####
44 // Contributors: gthomas
49 //####DESCRIPTIONEND####
51 //==========================================================================
55 #include <pkgconf/hal.h>
56 #include <cyg/hal/hal_arch.h>
57 #include <cyg/hal/hal_cache.h>
60 // CAUTION! This code must be copied to RAM before execution. Therefore,
61 // it must not contain any code which might be position dependent!
64 int flash_erase_block(volatile unsigned short *block)
66 volatile unsigned short *ROM, *sb;
73 ROM = (volatile unsigned short *)((unsigned long)block & 0xFF800000);
75 // Clear any error conditions
76 ROM[0] = FLASH_Clear_Status;
78 len = FLASH_BLOCK_SIZE;
79 if (((unsigned long)block - (unsigned long)ROM) < FLASH_BLOCK_SIZE) {
80 block_size = FLASH_BOOT_BLOCK_SIZE; // First 8 blocks are only 8Kx2 each
82 block_size = FLASH_BLOCK_SIZE;
87 ROM[0] = FLASH_Block_Erase;
88 *block = FLASH_Confirm;
90 while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
91 if (--timeout == 0) break;
95 block += block_size / sizeof(*block);
98 // Restore ROM to "normal" mode
101 // If an error was reported, see if the block erased anyway
102 if (stat & 0x007E007E) {
103 len = FLASH_BLOCK_SIZE;
106 if (*block++ != 0xFFFFFFFF) break;
107 len -= sizeof(*block);
109 if (len == 0) stat = 0;