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dc009d92 EB |
1 | #ifndef LINUX_KEXEC_H |
2 | #define LINUX_KEXEC_H | |
3 | ||
4 | #ifdef CONFIG_KEXEC | |
5 | #include <linux/types.h> | |
6 | #include <linux/list.h> | |
7 | #include <linux/linkage.h> | |
8 | #include <linux/compat.h> | |
9c15e852 | 9 | #include <linux/ioport.h> |
dc009d92 EB |
10 | #include <asm/kexec.h> |
11 | ||
12 | /* Verify architecture specific macros are defined */ | |
13 | ||
14 | #ifndef KEXEC_SOURCE_MEMORY_LIMIT | |
15 | #error KEXEC_SOURCE_MEMORY_LIMIT not defined | |
16 | #endif | |
17 | ||
18 | #ifndef KEXEC_DESTINATION_MEMORY_LIMIT | |
19 | #error KEXEC_DESTINATION_MEMORY_LIMIT not defined | |
20 | #endif | |
21 | ||
22 | #ifndef KEXEC_CONTROL_MEMORY_LIMIT | |
23 | #error KEXEC_CONTROL_MEMORY_LIMIT not defined | |
24 | #endif | |
25 | ||
26 | #ifndef KEXEC_CONTROL_CODE_SIZE | |
27 | #error KEXEC_CONTROL_CODE_SIZE not defined | |
28 | #endif | |
29 | ||
30 | #ifndef KEXEC_ARCH | |
31 | #error KEXEC_ARCH not defined | |
32 | #endif | |
33 | ||
34 | /* | |
35 | * This structure is used to hold the arguments that are used when loading | |
36 | * kernel binaries. | |
37 | */ | |
38 | ||
39 | typedef unsigned long kimage_entry_t; | |
40 | #define IND_DESTINATION 0x1 | |
41 | #define IND_INDIRECTION 0x2 | |
42 | #define IND_DONE 0x4 | |
43 | #define IND_SOURCE 0x8 | |
44 | ||
720e1a9f | 45 | #define KEXEC_SEGMENT_MAX 16 |
dc009d92 EB |
46 | struct kexec_segment { |
47 | void __user *buf; | |
48 | size_t bufsz; | |
49 | unsigned long mem; /* User space sees this as a (void *) ... */ | |
50 | size_t memsz; | |
51 | }; | |
52 | ||
53 | #ifdef CONFIG_COMPAT | |
54 | struct compat_kexec_segment { | |
55 | compat_uptr_t buf; | |
56 | compat_size_t bufsz; | |
57 | compat_ulong_t mem; /* User space sees this as a (void *) ... */ | |
58 | compat_size_t memsz; | |
59 | }; | |
60 | #endif | |
61 | ||
62 | struct kimage { | |
63 | kimage_entry_t head; | |
64 | kimage_entry_t *entry; | |
65 | kimage_entry_t *last_entry; | |
66 | ||
67 | unsigned long destination; | |
68 | ||
69 | unsigned long start; | |
70 | struct page *control_code_page; | |
71 | ||
72 | unsigned long nr_segments; | |
73 | struct kexec_segment segment[KEXEC_SEGMENT_MAX]; | |
74 | ||
75 | struct list_head control_pages; | |
76 | struct list_head dest_pages; | |
77 | struct list_head unuseable_pages; | |
78 | ||
79 | /* Address of next control page to allocate for crash kernels. */ | |
80 | unsigned long control_page; | |
81 | ||
82 | /* Flags to indicate special processing */ | |
83 | unsigned int type : 1; | |
84 | #define KEXEC_TYPE_DEFAULT 0 | |
85 | #define KEXEC_TYPE_CRASH 1 | |
86 | }; | |
87 | ||
88 | ||
89 | ||
90 | /* kexec interface functions */ | |
91 | extern NORET_TYPE void machine_kexec(struct kimage *image) ATTRIB_NORET; | |
92 | extern int machine_kexec_prepare(struct kimage *image); | |
93 | extern void machine_kexec_cleanup(struct kimage *image); | |
94 | extern asmlinkage long sys_kexec_load(unsigned long entry, | |
72414d3f MS |
95 | unsigned long nr_segments, |
96 | struct kexec_segment __user *segments, | |
97 | unsigned long flags); | |
dc009d92 EB |
98 | #ifdef CONFIG_COMPAT |
99 | extern asmlinkage long compat_sys_kexec_load(unsigned long entry, | |
72414d3f MS |
100 | unsigned long nr_segments, |
101 | struct compat_kexec_segment __user *segments, | |
102 | unsigned long flags); | |
dc009d92 | 103 | #endif |
72414d3f MS |
104 | extern struct page *kimage_alloc_control_pages(struct kimage *image, |
105 | unsigned int order); | |
6e274d14 AN |
106 | extern void crash_kexec(struct pt_regs *); |
107 | int kexec_should_crash(struct task_struct *); | |
dc009d92 | 108 | extern struct kimage *kexec_image; |
c330dda9 | 109 | extern struct kimage *kexec_crash_image; |
dc009d92 EB |
110 | |
111 | #define KEXEC_ON_CRASH 0x00000001 | |
112 | #define KEXEC_ARCH_MASK 0xffff0000 | |
113 | ||
114 | /* These values match the ELF architecture values. | |
115 | * Unless there is a good reason that should continue to be the case. | |
116 | */ | |
117 | #define KEXEC_ARCH_DEFAULT ( 0 << 16) | |
118 | #define KEXEC_ARCH_386 ( 3 << 16) | |
119 | #define KEXEC_ARCH_X86_64 (62 << 16) | |
120 | #define KEXEC_ARCH_PPC (20 << 16) | |
121 | #define KEXEC_ARCH_PPC64 (21 << 16) | |
122 | #define KEXEC_ARCH_IA_64 (50 << 16) | |
cf13f0ea | 123 | #define KEXEC_ARCH_S390 (22 << 16) |
9d44190e | 124 | #define KEXEC_ARCH_SH (42 << 16) |
dc009d92 EB |
125 | |
126 | #define KEXEC_FLAGS (KEXEC_ON_CRASH) /* List of defined/legal kexec flags */ | |
127 | ||
128 | /* Location of a reserved region to hold the crash kernel. | |
129 | */ | |
130 | extern struct resource crashk_res; | |
cc571658 VG |
131 | typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; |
132 | extern note_buf_t *crash_notes; | |
dc009d92 EB |
133 | |
134 | #else /* !CONFIG_KEXEC */ | |
6e274d14 AN |
135 | struct pt_regs; |
136 | struct task_struct; | |
137 | static inline void crash_kexec(struct pt_regs *regs) { } | |
138 | static inline int kexec_should_crash(struct task_struct *p) { return 0; } | |
dc009d92 EB |
139 | #endif /* CONFIG_KEXEC */ |
140 | #endif /* LINUX_KEXEC_H */ |