]>
Commit | Line | Data |
---|---|---|
c587e4a6 RP |
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> | |
9 | #include <asm/pgtable.h> | |
10 | #include <asm/pgalloc.h> | |
11 | #include <asm/mmu_context.h> | |
12 | #include <asm/io.h> | |
13 | #include <asm/cacheflush.h> | |
14 | #include <asm/mach-types.h> | |
15 | ||
16 | const extern unsigned char relocate_new_kernel[]; | |
17 | const extern unsigned int relocate_new_kernel_size; | |
18 | ||
19 | extern void setup_mm_for_reboot(char mode); | |
20 | ||
21 | extern unsigned long kexec_start_address; | |
22 | extern unsigned long kexec_indirection_page; | |
23 | extern unsigned long kexec_mach_type; | |
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 | ||
30 | int machine_kexec_prepare(struct kimage *image) | |
31 | { | |
32 | return 0; | |
33 | } | |
34 | ||
35 | void machine_kexec_cleanup(struct kimage *image) | |
36 | { | |
37 | } | |
38 | ||
39 | void machine_shutdown(void) | |
40 | { | |
41 | } | |
42 | ||
43 | void machine_crash_shutdown(struct pt_regs *regs) | |
44 | { | |
45 | } | |
46 | ||
47 | void machine_kexec(struct kimage *image) | |
48 | { | |
49 | unsigned long page_list; | |
50 | unsigned long reboot_code_buffer_phys; | |
51 | void *reboot_code_buffer; | |
52 | ||
53 | ||
54 | page_list = image->head & PAGE_MASK; | |
55 | ||
56 | /* we need both effective and real address here */ | |
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; | |
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 | } |