include/linux/kexec.h - kernel/mindspeed - Git at Google

 #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

 #ifndef KEXEC_CRASH_CONTROL_MEMORY_LIMIT
 #define KEXEC_CRASH_CONTROL_MEMORY_LIMIT KEXEC_CONTROL_MEMORY_LIMIT
 #endif

 #ifndef KEXEC_CRASH_MEM_ALIGN
 #define KEXEC_CRASH_MEM_ALIGN PAGE_SIZE
 #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 crash_map_reserved_pages(void);
 void crash_unmap_reserved_pages(void);
 void arch_crash_save_vmcoreinfo(void);
 __printf(1, 2)
 void vmcoreinfo_append_str(const char *fmt, ...);
 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 __percpu *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);
 int crash_shrink_memory(unsigned long new_size);
 size_t crash_get_memory_size(void);
 void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);

 #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 */
	#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

	#ifndef KEXEC_CRASH_CONTROL_MEMORY_LIMIT
	#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT KEXEC_CONTROL_MEMORY_LIMIT
	#endif

	#ifndef KEXEC_CRASH_MEM_ALIGN
	#define KEXEC_CRASH_MEM_ALIGN PAGE_SIZE
	#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 crash_map_reserved_pages(void);
	void crash_unmap_reserved_pages(void);
	void arch_crash_save_vmcoreinfo(void);
	__printf(1, 2)
	void vmcoreinfo_append_str(const char *fmt, ...);
	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 __percpu *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);
	int crash_shrink_memory(unsigned long new_size);
	size_t crash_get_memory_size(void);
	void crash_free_reserved_phys_range(unsigned long begin, unsigned long end);

	#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 */