Elliott Hughes | 5dec78d | 2014-02-26 15:56:23 -0800 | [diff] [blame] | 1 | #ifndef LINUX_KEXEC_H |
| 2 | #define LINUX_KEXEC_H |
| 3 | |
| 4 | /* kexec system call - It loads the new kernel to boot into. |
| 5 | * kexec does not sync, or unmount filesystems so if you need |
| 6 | * that to happen you need to do that yourself. |
| 7 | */ |
| 8 | |
| 9 | /* kexec flags for different usage scenarios */ |
| 10 | #define KEXEC_ON_CRASH 0x00000001 |
| 11 | #define KEXEC_PRESERVE_CONTEXT 0x00000002 |
| 12 | #define KEXEC_ARCH_MASK 0xffff0000 |
| 13 | |
| 14 | /* These values match the ELF architecture values. |
| 15 | * Unless there is a good reason that should continue to be the case. |
| 16 | */ |
| 17 | #define KEXEC_ARCH_DEFAULT ( 0 << 16) |
| 18 | #define KEXEC_ARCH_386 ( 3 << 16) |
| 19 | #define KEXEC_ARCH_X86_64 (62 << 16) |
| 20 | #define KEXEC_ARCH_PPC (20 << 16) |
| 21 | #define KEXEC_ARCH_PPC64 (21 << 16) |
| 22 | #define KEXEC_ARCH_IA_64 (50 << 16) |
| 23 | #define KEXEC_ARCH_ARM (40 << 16) |
| 24 | #define KEXEC_ARCH_S390 (22 << 16) |
| 25 | #define KEXEC_ARCH_SH (42 << 16) |
| 26 | #define KEXEC_ARCH_MIPS_LE (10 << 16) |
| 27 | #define KEXEC_ARCH_MIPS ( 8 << 16) |
| 28 | |
| 29 | /* The artificial cap on the number of segments passed to kexec_load. */ |
| 30 | #define KEXEC_SEGMENT_MAX 16 |
| 31 | |
| 32 | /* |
| 33 | * This structure is used to hold the arguments that are used when |
| 34 | * loading kernel binaries. |
| 35 | */ |
| 36 | struct kexec_segment { |
| 37 | const void *buf; |
| 38 | size_t bufsz; |
| 39 | const void *mem; |
| 40 | size_t memsz; |
| 41 | }; |
| 42 | |
| 43 | /* Load a new kernel image as described by the kexec_segment array |
| 44 | * consisting of passed number of segments at the entry-point address. |
| 45 | * The flags allow different useage types. |
| 46 | */ |
| 47 | extern int kexec_load(void *, size_t, struct kexec_segment *, |
| 48 | unsigned long int); |
| 49 | |
| 50 | #endif /* LINUX_KEXEC_H */ |