blob: e0df676274d8002550a29a1f4ea67ea997fad7d3 (
plain)
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
60
61
62
63
64
65
66
67
|
/*
* start-reset.c
*
* Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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
*/
#include <common.h>
#include <init.h>
#include <asm/system.h>
#include <asm/barebox-arm.h>
#include <asm/sections.h>
/*
* The actual reset vector. This code is position independent and usually
* does not run at the address it's linked at.
*/
void __naked __bare_init reset(void)
{
uint32_t r;
/* set the cpu to SVC32 mode */
__asm__ __volatile__("mrs %0, cpsr":"=r"(r));
r &= ~0x1f;
r |= 0xd3;
__asm__ __volatile__("msr cpsr, %0" : : "r"(r));
#ifdef CONFIG_ARCH_HAS_LOWLEVEL_INIT
arch_init_lowlevel();
#endif
/* disable MMU stuff and caches */
r = get_cr();
r &= ~(CR_M | CR_C | CR_B | CR_S | CR_R | CR_V);
r |= CR_I;
#if __LINUX_ARM_ARCH__ >= 6
r |= CR_U;
#else
r |= CR_A;
#endif
#ifdef __ARMEB__
r |= CR_B;
#endif
set_cr(r);
#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
board_init_lowlevel();
#endif
board_init_lowlevel_return();
}
|