Commit | Line | Data |
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9d44190e | 1 | /* |
2 | * machine_kexec.c - handle transition of Linux booting another kernel | |
3 | * Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com> | |
4 | * | |
5 | * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz | |
6 | * LANDISK/sh4 supported by kogiidena | |
7 | * | |
8 | * This source code is licensed under the GNU General Public License, | |
9 | * Version 2. See the file COPYING for more details. | |
10 | */ | |
11 | ||
12 | #include <linux/mm.h> | |
13 | #include <linux/kexec.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/reboot.h> | |
c3b4adfa | 16 | #include <linux/numa.h> |
9d44190e | 17 | #include <asm/pgtable.h> |
18 | #include <asm/pgalloc.h> | |
19 | #include <asm/mmu_context.h> | |
20 | #include <asm/io.h> | |
21 | #include <asm/cacheflush.h> | |
22 | ||
23 | typedef NORET_TYPE void (*relocate_new_kernel_t)( | |
24 | unsigned long indirection_page, | |
25 | unsigned long reboot_code_buffer, | |
26 | unsigned long start_address, | |
27 | unsigned long vbr_reg) ATTRIB_NORET; | |
28 | ||
2efe55a9 TK |
29 | extern const unsigned char relocate_new_kernel[]; |
30 | extern const unsigned int relocate_new_kernel_size; | |
9d44190e | 31 | extern void *gdb_vbr_vector; |
32 | ||
9d44190e | 33 | void machine_shutdown(void) |
34 | { | |
35 | } | |
36 | ||
37 | void machine_crash_shutdown(struct pt_regs *regs) | |
38 | { | |
39 | } | |
40 | ||
41 | /* | |
42 | * Do what every setup is needed on image and the | |
43 | * reboot code buffer to allow us to avoid allocations | |
44 | * later. | |
45 | */ | |
46 | int machine_kexec_prepare(struct kimage *image) | |
47 | { | |
48 | return 0; | |
49 | } | |
50 | ||
51 | void machine_kexec_cleanup(struct kimage *image) | |
52 | { | |
53 | } | |
54 | ||
55 | static void kexec_info(struct kimage *image) | |
56 | { | |
57 | int i; | |
58 | printk("kexec information\n"); | |
59 | for (i = 0; i < image->nr_segments; i++) { | |
60 | printk(" segment[%d]: 0x%08x - 0x%08x (0x%08x)\n", | |
61 | i, | |
62 | (unsigned int)image->segment[i].mem, | |
4d5ade5b PM |
63 | (unsigned int)image->segment[i].mem + |
64 | image->segment[i].memsz, | |
9d44190e | 65 | (unsigned int)image->segment[i].memsz); |
4d5ade5b | 66 | } |
9d44190e | 67 | printk(" start : 0x%08x\n\n", (unsigned int)image->start); |
68 | } | |
69 | ||
9d44190e | 70 | /* |
71 | * Do not allocate memory (or fail in any way) in machine_kexec(). | |
72 | * We are past the point of no return, committed to rebooting now. | |
73 | */ | |
3ab83521 | 74 | void machine_kexec(struct kimage *image) |
9d44190e | 75 | { |
76 | ||
77 | unsigned long page_list; | |
78 | unsigned long reboot_code_buffer; | |
79 | unsigned long vbr_reg; | |
80 | relocate_new_kernel_t rnk; | |
81 | ||
82 | #if defined(CONFIG_SH_STANDARD_BIOS) | |
83 | vbr_reg = ((unsigned long )gdb_vbr_vector) - 0x100; | |
84 | #else | |
85 | vbr_reg = 0x80000000; // dummy | |
86 | #endif | |
87 | /* Interrupts aren't acceptable while we reboot */ | |
88 | local_irq_disable(); | |
89 | ||
90 | page_list = image->head; | |
91 | ||
92 | /* we need both effective and real address here */ | |
93 | reboot_code_buffer = | |
94 | (unsigned long)page_address(image->control_code_page); | |
95 | ||
96 | /* copy our kernel relocation code to the control code page */ | |
97 | memcpy((void *)reboot_code_buffer, relocate_new_kernel, | |
98 | relocate_new_kernel_size); | |
99 | ||
100 | kexec_info(image); | |
101 | flush_cache_all(); | |
102 | ||
103 | /* now call it */ | |
104 | rnk = (relocate_new_kernel_t) reboot_code_buffer; | |
5734493b | 105 | (*rnk)(page_list, reboot_code_buffer, P2SEGADDR(image->start), vbr_reg); |
9d44190e | 106 | } |
107 | ||
c3b4adfa PM |
108 | void arch_crash_save_vmcoreinfo(void) |
109 | { | |
110 | #ifdef CONFIG_NUMA | |
111 | VMCOREINFO_SYMBOL(node_data); | |
112 | VMCOREINFO_LENGTH(node_data, MAX_NUMNODES); | |
113 | #endif | |
114 | } |