contrib: add ram loader src code
[openocd.git] / contrib / loaders / flash / stm32x.s
1 /***************************************************************************
2  *   Copyright (C) 2010 by Spencer Oliver                                  *
3  *   spen@spen-soft.co.uk                                                  *
4  *                                                                         *
5  *   This program is free software; you can redistribute it and/or modify  *
6  *   it under the terms of the GNU General Public License as published by  *
7  *   the Free Software Foundation; either version 2 of the License, or     *
8  *   (at your option) any later version.                                   *
9  *                                                                         *
10  *   This program is distributed in the hope that it will be useful,       *
11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
13  *   GNU General Public License for more details.                          *
14  *                                                                         *
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18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
19  ***************************************************************************/
20
21         .text
22         .arm
23
24 /*
25         r0 - source address
26         r1 - target address
27         r2 - count (halfword-16bit)
28         r3 - result
29         r4 - temp
30         r5 - temp
31 */
32
33 write:
34         ldr             r4, STM32_FLASH_CR
35         ldr             r5, STM32_FLASH_SR
36         mov             r3, #1
37         str             r3, [r4, #0]
38         ldrh    r3, [r0], #2
39         strh    r3, [r1], #2
40 busy:
41         ldr     r3, [r5, #0]
42         tst     r3, #0x01
43         beq     busy
44         tst             r3, #0x14
45         bne             exit
46         subs    r2, r2, #1
47         bne             write
48 exit:
49         bkpt    #0
50
51 STM32_FLASH_CR: .word 0x40022010
52 STM32_FLASH_SR: .word 0x4002200C