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, msalter
49 //####DESCRIPTIONEND####
51 //==========================================================================
55 #include <pkgconf/hal.h>
56 #include <cyg/hal/hal_arch.h>
59 int flash_erase_block(volatile unsigned char *block)
60 __attribute__ ((section (".2ram.flash_erase_block")));
61 int flash_erase_block(volatile unsigned char *block)
63 volatile unsigned char *ROM;
68 // First 4K page of flash at physcial address zero is
69 // virtually mapped to address 0xa0000000.
70 ROM = FLASH_P2V((unsigned)block & 0xFF800000);
72 // Clear any error conditions
73 ROM[0] = FLASH_Clear_Status;
76 ROM[0] = FLASH_Block_Erase;
77 *FLASH_P2V(block) = FLASH_Confirm;
79 while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
80 if (--timeout == 0) break;
83 // Restore ROM to "normal" mode
86 // If an error was reported, see if the block erased anyway
88 len = FLASH_BLOCK_SIZE;
90 if (*FLASH_P2V(block) != 0xFF)
93 len -= sizeof(*block);
95 if (len == 0) stat = 0;