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): gthomas, hmt
44 // Contributors: gthomas
49 //####DESCRIPTIONEND####
51 //==========================================================================
55 #include <pkgconf/hal.h>
56 #include <cyg/hal/hal_arch.h>
58 int flash_erase_block(volatile flash_t *block, unsigned int block_size)
59 __attribute__ ((section (".2ram.flash_erase_block")));
60 int flash_erase_block(volatile flash_t *block, unsigned int block_size)
62 volatile flash_t *ROM;
65 int len, block_len, erase_block_size;
68 // Get base address and map addresses to virtual addresses
69 ROM = FLASH_P2V(CYGNUM_FLASH_BASE_MASK & (unsigned int)block);
70 eb = block = FLASH_P2V(block);
71 block_len = block_size;
73 #ifdef CYGOPT_FLASH_IS_BOOTBLOCK
74 #define BLOCKSIZE (0x10000*CYGNUM_FLASH_DEVICES)
75 #define ERASE_BLOCKSIZE (0x2000*CYGNUM_FLASH_DEVICES)
76 if ((eb - ROM) < BLOCKSIZE/(sizeof eb[0])) {
77 erase_block_size = ERASE_BLOCKSIZE;
79 erase_block_size = block_size;
82 erase_block_size = block_size;
85 // Clear any error conditions
86 ROM[0] = FLASH_Clear_Status;
89 while (block_len > 0) {
90 eb[0] = FLASH_Block_Erase;
91 eb[0] = FLASH_Confirm;
94 while(((stat = eb[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
95 if (--timeout == 0) break;
98 block_len -= erase_block_size;
99 eb = FLASH_P2V((unsigned int)eb + erase_block_size);
102 // Restore ROM to "normal" mode
103 ROM[0] = FLASH_Reset;
105 // If an error was reported, see if the block erased anyway
106 if (stat & FLASH_ErrorMask ) {
109 if (*block++ != FLASH_BlankValue ) break;
110 len -= sizeof(*block);
112 if (len == 0) stat = 0;