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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 <linux/elfcore.h>
- #include <linux/elf.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_PAGE_SIZE
- #error KEXEC_CONTROL_PAGE_SIZE not defined
- #endif
- #ifndef KEXEC_ARCH
- #error KEXEC_ARCH not defined
- #endif
- #define KEXEC_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
- #define KEXEC_CORE_NOTE_NAME "CORE"
- #define KEXEC_CORE_NOTE_NAME_BYTES ALIGN(sizeof(KEXEC_CORE_NOTE_NAME), 4)
- #define KEXEC_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
- /*
- * The per-cpu notes area is a list of notes terminated by a "NULL"
- * note header. For kdump, the code in vmcore.c runs in the context
- * of the second kernel to combine them into one note.
- */
- #define KEXEC_NOTE_BYTES ( (KEXEC_NOTE_HEAD_BYTES * 2) + \
- KEXEC_CORE_NOTE_NAME_BYTES + \
- KEXEC_CORE_NOTE_DESC_BYTES )
- /*
- * 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;
- struct page *swap_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
- unsigned int preserve_context : 1;
- #ifdef ARCH_HAS_KIMAGE_ARCH
- struct kimage_arch arch;
- #endif
- };
- /* kexec interface functions */
- extern void machine_kexec(struct kimage *image);
- 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);
- extern int kernel_kexec(void);
- #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 *);
- void crash_save_cpu(struct pt_regs *regs, int cpu);
- void crash_save_vmcoreinfo(void);
- void arch_crash_save_vmcoreinfo(void);
- void vmcoreinfo_append_str(const char *fmt, ...)
- __attribute__ ((format (printf, 1, 2)));
- unsigned long paddr_vmcoreinfo_note(void);
- #define VMCOREINFO_OSRELEASE(value) \
- vmcoreinfo_append_str("OSRELEASE=%s\n", value)
- #define VMCOREINFO_PAGESIZE(value) \
- vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
- #define VMCOREINFO_SYMBOL(name) \
- vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
- #define VMCOREINFO_SIZE(name) \
- vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
- (unsigned long)sizeof(name))
- #define VMCOREINFO_STRUCT_SIZE(name) \
- vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
- (unsigned long)sizeof(struct name))
- #define VMCOREINFO_OFFSET(name, field) \
- vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
- (unsigned long)offsetof(struct name, field))
- #define VMCOREINFO_LENGTH(name, value) \
- vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
- #define VMCOREINFO_NUMBER(name) \
- vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
- #define VMCOREINFO_CONFIG(name) \
- vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
- extern struct kimage *kexec_image;
- extern struct kimage *kexec_crash_image;
- #ifndef kexec_flush_icache_page
- #define kexec_flush_icache_page(page)
- #endif
- #define KEXEC_ON_CRASH 0x00000001
- #define KEXEC_PRESERVE_CONTEXT 0x00000002
- #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_ARM (40 << 16)
- #define KEXEC_ARCH_S390 (22 << 16)
- #define KEXEC_ARCH_SH (42 << 16)
- #define KEXEC_ARCH_MIPS_LE (10 << 16)
- #define KEXEC_ARCH_MIPS ( 8 << 16)
- /* List of defined/legal kexec flags */
- #ifndef CONFIG_KEXEC_JUMP
- #define KEXEC_FLAGS KEXEC_ON_CRASH
- #else
- #define KEXEC_FLAGS (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT)
- #endif
- #define VMCOREINFO_BYTES (4096)
- #define VMCOREINFO_NOTE_NAME "VMCOREINFO"
- #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
- #define VMCOREINFO_NOTE_SIZE (KEXEC_NOTE_HEAD_BYTES*2 + VMCOREINFO_BYTES \
- + VMCOREINFO_NOTE_NAME_BYTES)
- /* Location of a reserved region to hold the crash kernel.
- */
- extern struct resource crashk_res;
- typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4];
- extern note_buf_t *crash_notes;
- extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
- extern size_t vmcoreinfo_size;
- extern size_t vmcoreinfo_max_size;
- int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
- unsigned long long *crash_size, unsigned long long *crash_base);
- #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 */
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