fix copyright.
[openocd.git] / ecosflash / flash.S
1 /***************************************************************************
2 * Copyright (C) 2008 √ėyvind Harboe *
3 * oyvind.harboe@zylin.com *
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 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
20 /*
21 Jump table for flash driver
22
23 Registers in ARM callling convention is to place args in registers
24 starting at r0.
25
26 So for:
27
28 void foo(int a, int b, int c).
29
30 a=r0
31 b=r1
32 c=r2
33
34
35 */
36 .global _stack_base
37 .global _stack_start
38 .global _workarea
39 .global _start
40 .global _start_bss_clear
41 _start:
42 // offset=0
43 // int erase(void *address, int len)
44 ldr sp,=_stack_start
45 bl erase
46 nop // Stop CPU here using hw breakpoint
47
48 // offset=0xc
49 // int program(void *buffer, void *address, int len)
50 ldr sp,=_stack_start
51 bl program
52 nop // Stop CPU here using hw breakpoint
53
54 // offset=0x18
55 ldr r0,=_workarea
56 nop // Stop CPU here using hw breakpoint
57
58 // offset=0x20
59 // int init() - returns error message if the flash chip can't be detected
60 ldr sp,=_stack_start
61 bl init
62 nop // Stop CPU here using hw breakpoint
63
64 .section ".bss"
65 .balign 4
66 _stack_base:
67 .rept 4096
68 .byte 0
69 .endr
70 _stack_start:
71 .balign 4
72 _workarea:
73 .rept 8192
74 .byte 0
75 .endr
76 // NB!!! we clear bss while the stack is in use, so we start BSS clearing here !!! :-)
77 _start_bss_clear:

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