blob: 863c66454f2b44ab82b0be5f55755df471153f5b (
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
68
69
70
71
72
73
74
75
76
77
78
|
/*
* machine_kexec.c - handle transition of Linux booting another kernel
*/
#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/cacheflush.h>
#include <asm/mach-types.h>
const extern unsigned char relocate_new_kernel[];
const extern unsigned int relocate_new_kernel_size;
extern void setup_mm_for_reboot(char mode);
extern unsigned long kexec_start_address;
extern unsigned long kexec_indirection_page;
extern unsigned long kexec_mach_type;
/*
* Provide a dummy crash_notes definition while crash dump arrives to arm.
* This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
*/
int machine_kexec_prepare(struct kimage *image)
{
return 0;
}
void machine_kexec_cleanup(struct kimage *image)
{
}
void machine_shutdown(void)
{
}
void machine_crash_shutdown(struct pt_regs *regs)
{
}
void machine_kexec(struct kimage *image)
{
unsigned long page_list;
unsigned long reboot_code_buffer_phys;
void *reboot_code_buffer;
page_list = image->head & PAGE_MASK;
/* we need both effective and real address here */
reboot_code_buffer_phys =
page_to_pfn(image->control_code_page) << PAGE_SHIFT;
reboot_code_buffer = page_address(image->control_code_page);
/* Prepare parameters for reboot_code_buffer*/
kexec_start_address = image->start;
kexec_indirection_page = page_list;
kexec_mach_type = machine_arch_type;
/* copy our kernel relocation code to the control code page */
memcpy(reboot_code_buffer,
relocate_new_kernel, relocate_new_kernel_size);
flush_icache_range((unsigned long) reboot_code_buffer,
(unsigned long) reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
printk(KERN_INFO "Bye!\n");
cpu_proc_fin();
setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
cpu_reset(reboot_code_buffer_phys);
}
|
