machine_kexec.c (bc95f3669f5e6f63cf0b84fe4922c3c6dd4aa775) machine_kexec.c (4cd9d6f774c7e0578bbc4409d4490d8f2097d40a)
1/*
2 * machine_kexec.c - handle transition of Linux booting another kernel
3 */
4
5#include <linux/mm.h>
6#include <linux/kexec.h>
7#include <linux/delay.h>
8#include <linux/reboot.h>

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16const extern unsigned char relocate_new_kernel[];
17const extern unsigned int relocate_new_kernel_size;
18
19extern void setup_mm_for_reboot(char mode);
20
21extern unsigned long kexec_start_address;
22extern unsigned long kexec_indirection_page;
23extern unsigned long kexec_mach_type;
1/*
2 * machine_kexec.c - handle transition of Linux booting another kernel
3 */
4
5#include <linux/mm.h>
6#include <linux/kexec.h>
7#include <linux/delay.h>
8#include <linux/reboot.h>

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16const extern unsigned char relocate_new_kernel[];
17const extern unsigned int relocate_new_kernel_size;
18
19extern void setup_mm_for_reboot(char mode);
20
21extern unsigned long kexec_start_address;
22extern unsigned long kexec_indirection_page;
23extern unsigned long kexec_mach_type;
24extern unsigned long kexec_boot_atags;
24
25/*
26 * Provide a dummy crash_notes definition while crash dump arrives to arm.
27 * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
28 */
29
30int machine_kexec_prepare(struct kimage *image)
31{

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57 reboot_code_buffer_phys =
58 page_to_pfn(image->control_code_page) << PAGE_SHIFT;
59 reboot_code_buffer = page_address(image->control_code_page);
60
61 /* Prepare parameters for reboot_code_buffer*/
62 kexec_start_address = image->start;
63 kexec_indirection_page = page_list;
64 kexec_mach_type = machine_arch_type;
25
26/*
27 * Provide a dummy crash_notes definition while crash dump arrives to arm.
28 * This prevents breakage of crash_notes attribute in kernel/ksysfs.c.
29 */
30
31int machine_kexec_prepare(struct kimage *image)
32{

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58 reboot_code_buffer_phys =
59 page_to_pfn(image->control_code_page) << PAGE_SHIFT;
60 reboot_code_buffer = page_address(image->control_code_page);
61
62 /* Prepare parameters for reboot_code_buffer*/
63 kexec_start_address = image->start;
64 kexec_indirection_page = page_list;
65 kexec_mach_type = machine_arch_type;
66 kexec_boot_atags = image->start - KEXEC_ARM_ZIMAGE_OFFSET + KEXEC_ARM_ATAGS_OFFSET;
65
66 /* copy our kernel relocation code to the control code page */
67 memcpy(reboot_code_buffer,
68 relocate_new_kernel, relocate_new_kernel_size);
69
70
71 flush_icache_range((unsigned long) reboot_code_buffer,
72 (unsigned long) reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
73 printk(KERN_INFO "Bye!\n");
74
75 cpu_proc_fin();
76 setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
77 cpu_reset(reboot_code_buffer_phys);
78}
67
68 /* copy our kernel relocation code to the control code page */
69 memcpy(reboot_code_buffer,
70 relocate_new_kernel, relocate_new_kernel_size);
71
72
73 flush_icache_range((unsigned long) reboot_code_buffer,
74 (unsigned long) reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
75 printk(KERN_INFO "Bye!\n");
76
77 cpu_proc_fin();
78 setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
79 cpu_reset(reboot_code_buffer_phys);
80}