[PATCH] bcm43xx: Fix array overrun in bcm43xx_geo_init
[linux-2.6/kmemtrace.git] / include / linux / kexec.h
blobcfb3410e32b16cf1761de1d7b4512ae918ed0f50
1 #ifndef LINUX_KEXEC_H
2 #define LINUX_KEXEC_H
4 #ifdef CONFIG_KEXEC
5 #include <linux/types.h>
6 #include <linux/list.h>
7 #include <linux/linkage.h>
8 #include <linux/compat.h>
9 #include <linux/ioport.h>
10 #include <asm/kexec.h>
12 /* Verify architecture specific macros are defined */
14 #ifndef KEXEC_SOURCE_MEMORY_LIMIT
15 #error KEXEC_SOURCE_MEMORY_LIMIT not defined
16 #endif
18 #ifndef KEXEC_DESTINATION_MEMORY_LIMIT
19 #error KEXEC_DESTINATION_MEMORY_LIMIT not defined
20 #endif
22 #ifndef KEXEC_CONTROL_MEMORY_LIMIT
23 #error KEXEC_CONTROL_MEMORY_LIMIT not defined
24 #endif
26 #ifndef KEXEC_CONTROL_CODE_SIZE
27 #error KEXEC_CONTROL_CODE_SIZE not defined
28 #endif
30 #ifndef KEXEC_ARCH
31 #error KEXEC_ARCH not defined
32 #endif
35 * This structure is used to hold the arguments that are used when loading
36 * kernel binaries.
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
45 #define KEXEC_SEGMENT_MAX 16
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;
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;
60 #endif
62 struct kimage {
63 kimage_entry_t head;
64 kimage_entry_t *entry;
65 kimage_entry_t *last_entry;
67 unsigned long destination;
69 unsigned long start;
70 struct page *control_code_page;
72 unsigned long nr_segments;
73 struct kexec_segment segment[KEXEC_SEGMENT_MAX];
75 struct list_head control_pages;
76 struct list_head dest_pages;
77 struct list_head unuseable_pages;
79 /* Address of next control page to allocate for crash kernels. */
80 unsigned long control_page;
82 /* Flags to indicate special processing */
83 unsigned int type : 1;
84 #define KEXEC_TYPE_DEFAULT 0
85 #define KEXEC_TYPE_CRASH 1
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,
95 unsigned long nr_segments,
96 struct kexec_segment __user *segments,
97 unsigned long flags);
98 #ifdef CONFIG_COMPAT
99 extern asmlinkage long compat_sys_kexec_load(unsigned long entry,
100 unsigned long nr_segments,
101 struct compat_kexec_segment __user *segments,
102 unsigned long flags);
103 #endif
104 extern struct page *kimage_alloc_control_pages(struct kimage *image,
105 unsigned int order);
106 extern void crash_kexec(struct pt_regs *);
107 int kexec_should_crash(struct task_struct *);
108 extern struct kimage *kexec_image;
110 #define KEXEC_ON_CRASH 0x00000001
111 #define KEXEC_ARCH_MASK 0xffff0000
113 /* These values match the ELF architecture values.
114 * Unless there is a good reason that should continue to be the case.
116 #define KEXEC_ARCH_DEFAULT ( 0 << 16)
117 #define KEXEC_ARCH_386 ( 3 << 16)
118 #define KEXEC_ARCH_X86_64 (62 << 16)
119 #define KEXEC_ARCH_PPC (20 << 16)
120 #define KEXEC_ARCH_PPC64 (21 << 16)
121 #define KEXEC_ARCH_IA_64 (50 << 16)
122 #define KEXEC_ARCH_S390 (22 << 16)
123 #define KEXEC_ARCH_SH (42 << 16)
125 #define KEXEC_FLAGS (KEXEC_ON_CRASH) /* List of defined/legal kexec flags */
127 /* Location of a reserved region to hold the crash kernel.
129 extern struct resource crashk_res;
130 typedef u32 note_buf_t[MAX_NOTE_BYTES/4];
131 extern note_buf_t *crash_notes;
133 #else /* !CONFIG_KEXEC */
134 struct pt_regs;
135 struct task_struct;
136 static inline void crash_kexec(struct pt_regs *regs) { }
137 static inline int kexec_should_crash(struct task_struct *p) { return 0; }
138 #endif /* CONFIG_KEXEC */
139 #endif /* LINUX_KEXEC_H */