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- #ifndef LINUX_KEXEC_H
- #define LINUX_KEXEC_H
-
- #ifdef CONFIG_KEXEC
- #include <linux/types.h>
- #include <linux/list.h>
- #include <linux/linkage.h>
- #include <linux/compat.h>
- #include <linux/ioport.h>
- #include <asm/kexec.h>
-
- /* Verify architecture specific macros are defined */
-
- #ifndef KEXEC_SOURCE_MEMORY_LIMIT
- #error KEXEC_SOURCE_MEMORY_LIMIT not defined
- #endif
-
- #ifndef KEXEC_DESTINATION_MEMORY_LIMIT
- #error KEXEC_DESTINATION_MEMORY_LIMIT not defined
- #endif
-
- #ifndef KEXEC_CONTROL_MEMORY_LIMIT
- #error KEXEC_CONTROL_MEMORY_LIMIT not defined
- #endif
-
- #ifndef KEXEC_CONTROL_CODE_SIZE
- #error KEXEC_CONTROL_CODE_SIZE not defined
- #endif
-
- #ifndef KEXEC_ARCH
- #error KEXEC_ARCH not defined
- #endif
-
- /*
- * This structure is used to hold the arguments that are used when loading
- * kernel binaries.
- */
-
- typedef unsigned long kimage_entry_t;
- #define IND_DESTINATION 0x1
- #define IND_INDIRECTION 0x2
- #define IND_DONE 0x4
- #define IND_SOURCE 0x8
-
- #define KEXEC_SEGMENT_MAX 16
- struct kexec_segment {
- void __user *buf;
- size_t bufsz;
- unsigned long mem; /* User space sees this as a (void *) ... */
- size_t memsz;
- };
-
- #ifdef CONFIG_COMPAT
- struct compat_kexec_segment {
- compat_uptr_t buf;
- compat_size_t bufsz;
- compat_ulong_t mem; /* User space sees this as a (void *) ... */
- compat_size_t memsz;
- };
- #endif
-
- struct kimage {
- kimage_entry_t head;
- kimage_entry_t *entry;
- kimage_entry_t *last_entry;
-
- unsigned long destination;
-
- unsigned long start;
- struct page *control_code_page;
-
- unsigned long nr_segments;
- struct kexec_segment segment[KEXEC_SEGMENT_MAX];
-
- struct list_head control_pages;
- struct list_head dest_pages;
- struct list_head unuseable_pages;
-
- /* Address of next control page to allocate for crash kernels. */
- unsigned long control_page;
-
- /* Flags to indicate special processing */
- unsigned int type : 1;
- #define KEXEC_TYPE_DEFAULT 0
- #define KEXEC_TYPE_CRASH 1
- };
-
-
-
- /* kexec interface functions */
- extern NORET_TYPE void machine_kexec(struct kimage *image) ATTRIB_NORET;
- extern int machine_kexec_prepare(struct kimage *image);
- extern void machine_kexec_cleanup(struct kimage *image);
- extern asmlinkage long sys_kexec_load(unsigned long entry,
- unsigned long nr_segments,
- struct kexec_segment __user *segments,
- unsigned long flags);
- #ifdef CONFIG_COMPAT
- extern asmlinkage long compat_sys_kexec_load(unsigned long entry,
- unsigned long nr_segments,
- struct compat_kexec_segment __user *segments,
- unsigned long flags);
- #endif
- extern struct page *kimage_alloc_control_pages(struct kimage *image,
- unsigned int order);
- extern void crash_kexec(struct pt_regs *);
- int kexec_should_crash(struct task_struct *);
- extern struct kimage *kexec_image;
-
- #define KEXEC_ON_CRASH 0x00000001
- #define KEXEC_ARCH_MASK 0xffff0000
-
- /* These values match the ELF architecture values.
- * Unless there is a good reason that should continue to be the case.
- */
- #define KEXEC_ARCH_DEFAULT ( 0 << 16)
- #define KEXEC_ARCH_386 ( 3 << 16)
- #define KEXEC_ARCH_X86_64 (62 << 16)
- #define KEXEC_ARCH_PPC (20 << 16)
- #define KEXEC_ARCH_PPC64 (21 << 16)
- #define KEXEC_ARCH_IA_64 (50 << 16)
- #define KEXEC_ARCH_S390 (22 << 16)
- #define KEXEC_ARCH_SH (42 << 16)
-
- #define KEXEC_FLAGS (KEXEC_ON_CRASH) /* List of defined/legal kexec flags */
-
- /* Location of a reserved region to hold the crash kernel.
- */
- extern struct resource crashk_res;
- typedef u32 note_buf_t[MAX_NOTE_BYTES/4];
- extern note_buf_t *crash_notes;
-
- #else /* !CONFIG_KEXEC */
- struct pt_regs;
- struct task_struct;
- static inline void crash_kexec(struct pt_regs *regs) { }
- static inline int kexec_should_crash(struct task_struct *p) { return 0; }
- #endif /* CONFIG_KEXEC */
- #endif /* LINUX_KEXEC_H */
-