2010-10-28 03:19:37 -05:00
|
|
|
/***************************************************************************
|
|
|
|
|
* Copyright (C) 2010 by Spencer Oliver *
|
|
|
|
|
* spen@spen-soft.co.uk *
|
|
|
|
|
* *
|
|
|
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
|
|
|
* it under the terms of the GNU General Public License as published by *
|
|
|
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
|
|
|
* (at your option) any later version. *
|
|
|
|
|
* *
|
|
|
|
|
* This program is distributed in the hope that it will be useful, *
|
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
|
|
|
* GNU General Public License for more details. *
|
|
|
|
|
* *
|
|
|
|
|
* You should have received a copy of the GNU General Public License *
|
|
|
|
|
* along with this program; if not, write to the *
|
|
|
|
|
* Free Software Foundation, Inc., *
|
|
|
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
|
|
|
|
|
***************************************************************************/
|
|
|
|
|
|
|
|
|
|
.text
|
|
|
|
|
.arm
|
2010-12-09 10:42:04 -06:00
|
|
|
.arch armv4t
|
|
|
|
|
|
2010-10-28 03:19:37 -05:00
|
|
|
.section .init
|
|
|
|
|
/*
|
|
|
|
|
r0 source address
|
|
|
|
|
r1 address
|
|
|
|
|
r2 FLASH_CR0
|
|
|
|
|
r3 dword count
|
|
|
|
|
r4 result
|
|
|
|
|
r5 busy mask
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
write:
|
|
|
|
|
mov r4, #0x10000000 /* set DWPG bit */
|
|
|
|
|
str r4, [r2, #0x0] /* FLASH_CR0 */
|
|
|
|
|
str r1, [r2, #0x10] /* FLASH_AR */
|
|
|
|
|
ldr r4, [r0], #4 /* load data */
|
|
|
|
|
str r4, [r2, #0x8] /* FLASH_DR0 */
|
|
|
|
|
ldr r4, [r0], #4 /* load data */
|
|
|
|
|
str r4, [r2, #0xc] /* FLASH_DR1 */
|
|
|
|
|
mov r4, #0x90000000 /* set DWPG and WMS bits */
|
|
|
|
|
str r4, [r2, #0x0] /* FLASH_CR0 */
|
|
|
|
|
busy:
|
|
|
|
|
ldr r4, [r2, #0x0] /* FLASH_CR0 */
|
|
|
|
|
tst r4, r5
|
|
|
|
|
bne busy
|
|
|
|
|
ldr r4, [r2, #0x14] /* FLASH_ER */
|
|
|
|
|
tst r4, #0xff /* do we have errors */
|
|
|
|
|
tsteq r4, #0x100 /* write protection set */
|
|
|
|
|
bne exit
|
|
|
|
|
add r1, r1, #0x8 /* next 8 bytes */
|
|
|
|
|
subs r3, r3, #1 /* decremment dword count */
|
|
|
|
|
bne write
|
|
|
|
|
exit:
|
|
|
|
|
b exit
|
|
|
|
|
|
|
|
|
|
.end
|
