1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* start.S - assembly code for startup on baremetal tests
*
* Copyright (c) 2015 Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of Linaro Limited nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*/
#ifndef __aarch64__
.syntax unified
#endif
.text
.globl start
start:
# We assume uniprocessor.
#ifndef __aarch64__
# Set up a stack
ldr sp, =stacktop
# Turn on the FPU
mov r0, 0xf00000
mcr p15, 0, r0, c1, c0, 2
bl main
bl semi_exit
# not reached
1: b 1b
#else
# Set up a stack
ldr x0, =stacktop
mov sp, x0
# Turn on the FPU
mov x0, 0x300000
msr CPACR_EL1, x0
bl main
bl semi_exit
# not reached
1: b 1b
#endif
|
