projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 7a0268fa AB |
1 | #ifndef _ASM_POWERPC_PERCPU_H_ |
| 2 | #define _ASM_POWERPC_PERCPU_H_ | |
| 3 | #ifdef __powerpc64__ | |
| 4 | #include <linux/compiler.h> | |
| 5 | ||
| 6 | /* | |
| 7 | * Same as asm-generic/percpu.h, except that we store the per cpu offset | |
| 8 | * in the paca. Based on the x86-64 implementation. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifdef CONFIG_SMP | |
| 12 | ||
| 13 | #include <asm/paca.h> | |
| 14 | ||
| 15 | #define __per_cpu_offset(cpu) (paca[cpu].data_offset) | |
| 16 | #define __my_cpu_offset() get_paca()->data_offset | |
| a875a69f | 17 | #define per_cpu_offset(x) (__per_cpu_offset(x)) |
| 7a0268fa AB |
18 | |
| 19 | /* Separate out the type, so (int[3], foo) works. */ | |
| 20 | #define DEFINE_PER_CPU(type, name) \ | |
| 21 | __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name | |
| 22 | ||
| 5fb7dc37 FY |
23 | #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ |
| 24 | __attribute__((__section__(".data.percpu.shared_aligned"))) \ | |
| 25 | __typeof__(type) per_cpu__##name \ | |
| 26 | ____cacheline_aligned_in_smp | |
| 27 | ||
| 7a0268fa AB |
28 | /* var is in discarded region: offset to particular copy we want */ |
| 29 | #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu))) | |
| 30 | #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset())) | |
| bfe5d834 | 31 | #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __my_cpu_offset())) |
| 7a0268fa AB |
32 | |
| 33 | /* A macro to avoid #include hell... */ | |
| 34 | #define percpu_modcopy(pcpudst, src, size) \ | |
| 35 | do { \ | |
| 36 | unsigned int __i; \ | |
| 0e551954 | 37 | for_each_possible_cpu(__i) \ |
| 394e3902 AM |
38 | memcpy((pcpudst)+__per_cpu_offset(__i), \ |
| 39 | (src), (size)); \ | |
| 7a0268fa AB |
40 | } while (0) |
| 41 | ||
| 42 | extern void setup_per_cpu_areas(void); | |
| 43 | ||
| 44 | #else /* ! SMP */ | |
| 45 | ||
| 46 | #define DEFINE_PER_CPU(type, name) \ | |
| 47 | __typeof__(type) per_cpu__##name | |
| 5fb7dc37 FY |
48 | #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ |
| 49 | DEFINE_PER_CPU(type, name) | |
| 7a0268fa AB |
50 | |
| 51 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) | |
| 52 | #define __get_cpu_var(var) per_cpu__##var | |
| bfe5d834 | 53 | #define __raw_get_cpu_var(var) per_cpu__##var |
| 7a0268fa AB |
54 | |
| 55 | #endif /* SMP */ | |
| 56 | ||
| 57 | #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name | |
| 58 | ||
| 59 | #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) | |
| 60 | #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) | |
| 61 | ||
| 62 | #else | |
| 6f9aa727 | 63 | #include <asm-generic/percpu.h> |
| 7a0268fa AB |
64 | #endif |
| 65 | ||
| 66 | #endif /* _ASM_POWERPC_PERCPU_H_ */ |