1c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef LINUX_KEXEC_H 2c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define LINUX_KEXEC_H 3c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 4c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef CONFIG_KEXEC 5c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/types.h> 6c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/list.h> 7c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/linkage.h> 8c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/compat.h> 9c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/ioport.h> 10c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/kexec.h> 11c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 12c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Verify architecture specific macros are defined */ 13c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 14c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef KEXEC_SOURCE_MEMORY_LIMIT 15c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#error KEXEC_SOURCE_MEMORY_LIMIT not defined 16c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 17c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 18c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef KEXEC_DESTINATION_MEMORY_LIMIT 19c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#error KEXEC_DESTINATION_MEMORY_LIMIT not defined 20c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 21c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 22c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef KEXEC_CONTROL_MEMORY_LIMIT 23c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#error KEXEC_CONTROL_MEMORY_LIMIT not defined 24c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 25c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 26c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef KEXEC_CONTROL_CODE_SIZE 27c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#error KEXEC_CONTROL_CODE_SIZE not defined 28c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 29c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 30c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef KEXEC_ARCH 31c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#error KEXEC_ARCH not defined 32c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 33c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 34c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 35c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * This structure is used to hold the arguments that are used when loading 36c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * kernel binaries. 37c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 38c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 39c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querutypedef unsigned long kimage_entry_t; 40c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define IND_DESTINATION 0x1 41c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define IND_INDIRECTION 0x2 42c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define IND_DONE 0x4 43c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define IND_SOURCE 0x8 44c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 45c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_SEGMENT_MAX 16 46c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct kexec_segment { 47c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru void __user *buf; 48c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru size_t bufsz; 49c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long mem; /* User space sees this as a (void *) ... */ 50c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru size_t memsz; 51c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 52c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 53c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef CONFIG_COMPAT 54c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct compat_kexec_segment { 55c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru compat_uptr_t buf; 56c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru compat_size_t bufsz; 57c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru compat_ulong_t mem; /* User space sees this as a (void *) ... */ 58c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru compat_size_t memsz; 59c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 60c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 61c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 62c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct kimage { 63c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru kimage_entry_t head; 64c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru kimage_entry_t *entry; 65c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru kimage_entry_t *last_entry; 66c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 67c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long destination; 68c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 69c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long start; 70c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct page *control_code_page; 71c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 72c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long nr_segments; 73c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct kexec_segment segment[KEXEC_SEGMENT_MAX]; 74c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 75c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct list_head control_pages; 76c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct list_head dest_pages; 77c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct list_head unuseable_pages; 78c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 79c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru /* Address of next control page to allocate for crash kernels. */ 80c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long control_page; 81c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 82c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru /* Flags to indicate special processing */ 83c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned int type : 1; 84c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_TYPE_DEFAULT 0 85c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_TYPE_CRASH 1 86c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 87c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 88c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 89c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 90c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* kexec interface functions */ 91c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern NORET_TYPE void machine_kexec(struct kimage *image) ATTRIB_NORET; 92c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int machine_kexec_prepare(struct kimage *image); 93c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void machine_kexec_cleanup(struct kimage *image); 94c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern asmlinkage long sys_kexec_load(unsigned long entry, 95c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long nr_segments, 96c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct kexec_segment __user *segments, 97c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long flags); 98c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef CONFIG_COMPAT 99c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern asmlinkage long compat_sys_kexec_load(unsigned long entry, 100c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long nr_segments, 101c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct compat_kexec_segment __user *segments, 102c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long flags); 103c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 104c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern struct page *kimage_alloc_control_pages(struct kimage *image, 105c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned int order); 106c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void crash_kexec(struct pt_regs *); 107c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruint kexec_should_crash(struct task_struct *); 108c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern struct kimage *kexec_image; 109c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern struct kimage *kexec_crash_image; 110c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 111c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ON_CRASH 0x00000001 112c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_MASK 0xffff0000 113c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 114c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* These values match the ELF architecture values. 115c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Unless there is a good reason that should continue to be the case. 116c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 117c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_DEFAULT ( 0 << 16) 118c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_386 ( 3 << 16) 119c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_X86_64 (62 << 16) 120c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_PPC (20 << 16) 121c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_PPC64 (21 << 16) 122c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_IA_64 (50 << 16) 123c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_S390 (22 << 16) 124c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_ARCH_SH (42 << 16) 125c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 126c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define KEXEC_FLAGS (KEXEC_ON_CRASH) /* List of defined/legal kexec flags */ 127c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 128c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* Location of a reserved region to hold the crash kernel. 129c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 130c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern struct resource crashk_res; 131c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querutypedef u32 note_buf_t[MAX_NOTE_BYTES/4]; 132c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern note_buf_t *crash_notes; 133c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 134c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else /* !CONFIG_KEXEC */ 135c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct pt_regs; 136c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct task_struct; 137c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void crash_kexec(struct pt_regs *regs) { } 138c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline int kexec_should_crash(struct task_struct *p) { return 0; } 139c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* CONFIG_KEXEC */ 140c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* LINUX_KEXEC_H */ 141