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
|
/*
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2007-2009 PetaLogix
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/linkage.h>
#include <asm/thread_info.h>
#include <asm/page.h>
.text
ENTRY(_start)
mfs r1, rmsr
andi r1, r1, ~2
mts rmsr, r1
/* save fdt to kernel location */
/* r7 stores pointer to fdt blob */
beqi r7, no_fdt_arg
or r11, r0, r0 /* incremment */
ori r4, r0, TOPHYS(_fdt_start) /* save bram context */
ori r3, r0, (0x4000 - 4)
_copy_fdt:
lw r12, r7, r11 /* r12 = r7 + r11 */
sw r12, r4, r11 /* addr[r4 + r11] = r12 */
addik r11, r11, 4 /* increment counting */
bgtid r3, _copy_fdt /* loop for all entries */
addik r3, r3, -4 /* descrement loop */
no_fdt_arg:
/* Initialize small data anchors */
la r13, r0, _KERNEL_SDA_BASE_
la r2, r0, _KERNEL_SDA2_BASE_
/* Initialize stack pointer */
la r1, r0, init_thread_union + THREAD_SIZE - 4
/* Initialize r31 with current task address */
la r31, r0, init_task
/*
* Call platform dependent initialize function.
* Please see $(ARCH)/mach-$(SUBARCH)/setup.c for
* the function.
*/
la r8, r0, machine_early_init
brald r15, r8
nop
la r15, r0, machine_halt
braid start_kernel
nop
|
