- added sam7x256 test example, and test result
[openocd.git] / ecosflash / flash.S
1 /*
2 #####ECOSGPLCOPYRIGHTBEGIN####
3 ## -------------------------------------------
4 ## This file is part of eCos, the Embedded Configurable Operating System.
5 ## Copyright (C) 2008 √ėyvind Harboe
6 ##
7 ## eCos is free software; you can redistribute it and/or modify it under
8 ## the terms of the GNU General Public License as published by the Free
9 ## Software Foundation; either version 2 or (at your option) any later version.
10 ##
11 ## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
12 ## WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 ## for more details.
15 ##
16 ## You should have received a copy of the GNU General Public License along
17 ## with eCos; if not, write to the Free Software Foundation, Inc.,
18 ## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
19 ##
20 ## As a special exception, if other files instantiate templates or use macros
21 ## or inline functions from this file, or you compile this file and link it
22 ## with other works to produce a work based on this file, this file does not
23 ## by itself cause the resulting work to be covered by the GNU General Public
24 ## License. However the source code for this file must still be made available
25 ## in accordance with section (3) of the GNU General Public License.
26 ##
27 ## This exception does not invalidate any other reasons why a work based on
28 ## this file might be covered by the GNU General Public License.
29 ## -------------------------------------------
30 #####ECOSGPLCOPYRIGHTEND####
31 */
32
33 /*
34 Jump table for flash driver
35
36 Registers in ARM callling convention is to place args in registers
37 starting at r0.
38
39 So for:
40
41 void foo(int a, int b, int c).
42
43 a=r0
44 b=r1
45 c=r2
46
47
48 */
49 .global _stack_base
50 .global _stack_start
51 .global _workarea
52 .global _start
53 .global _start_bss_clear
54 _start:
55 // offset=0
56 // int erase(void *address, int len)
57 ldr sp,=_stack_start
58 bl erase
59 nop // Stop CPU here using hw breakpoint
60
61 // offset=0xc
62 // int program(void *buffer, void *address, int len)
63 ldr sp,=_stack_start
64 bl program
65 nop // Stop CPU here using hw breakpoint
66
67 // offset=0x18
68 ldr r0,=_workarea
69 nop // Stop CPU here using hw breakpoint
70
71 // offset=0x20
72 // int init() - returns error message if the flash chip can't be detected
73 ldr sp,=_stack_start
74 bl init
75 nop // Stop CPU here using hw breakpoint
76
77 .section ".bss"
78 .balign 4
79 _stack_base:
80 .rept 4096
81 .byte 0
82 .endr
83 _stack_start:
84 .balign 4
85 _workarea:
86 .rept 8192
87 .byte 0
88 .endr
89 // NB!!! we clear bss while the stack is in use, so we start BSS clearing here !!! :-)
90 _start_bss_clear:

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|=..              |
|+o..   .         |
|*.o   . .        |
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