Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _ASM_X8664_PERCPU_H_ |
2 | #define _ASM_X8664_PERCPU_H_ | |
3 | #include <linux/compiler.h> | |
4 | ||
5 | /* Same as asm-generic/percpu.h, except that we store the per cpu offset | |
6 | in the PDA. Longer term the PDA and every per cpu variable | |
7 | should be just put into a single section and referenced directly | |
8 | from %gs */ | |
9 | ||
10 | #ifdef CONFIG_SMP | |
11 | ||
12 | #include <asm/pda.h> | |
13 | ||
df79efde | 14 | #define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset) |
1da177e4 LT |
15 | #define __my_cpu_offset() read_pda(data_offset) |
16 | ||
a875a69f IM |
17 | #define per_cpu_offset(x) (__per_cpu_offset(x)) |
18 | ||
1da177e4 LT |
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_internodealigned_in_smp | |
27 | ||
1da177e4 | 28 | /* var is in discarded region: offset to particular copy we want */ |
632bbfee | 29 | #define per_cpu(var, cpu) (*({ \ |
a666ecfb | 30 | extern int simple_identifier_##var(void); \ |
632bbfee JB |
31 | RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)); })) |
32 | #define __get_cpu_var(var) (*({ \ | |
a666ecfb | 33 | extern int simple_identifier_##var(void); \ |
632bbfee JB |
34 | RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); })) |
35 | #define __raw_get_cpu_var(var) (*({ \ | |
a666ecfb | 36 | extern int simple_identifier_##var(void); \ |
632bbfee | 37 | RELOC_HIDE(&per_cpu__##var, __my_cpu_offset()); })) |
1da177e4 LT |
38 | |
39 | /* A macro to avoid #include hell... */ | |
40 | #define percpu_modcopy(pcpudst, src, size) \ | |
41 | do { \ | |
42 | unsigned int __i; \ | |
676ff453 | 43 | for_each_possible_cpu(__i) \ |
394e3902 AM |
44 | memcpy((pcpudst)+__per_cpu_offset(__i), \ |
45 | (src), (size)); \ | |
1da177e4 LT |
46 | } while (0) |
47 | ||
48 | extern void setup_per_cpu_areas(void); | |
49 | ||
50 | #else /* ! SMP */ | |
51 | ||
52 | #define DEFINE_PER_CPU(type, name) \ | |
53 | __typeof__(type) per_cpu__##name | |
5fb7dc37 FY |
54 | #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \ |
55 | DEFINE_PER_CPU(type, name) | |
1da177e4 | 56 | |
11c80c83 | 57 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var)) |
1da177e4 | 58 | #define __get_cpu_var(var) per_cpu__##var |
bfe5d834 | 59 | #define __raw_get_cpu_var(var) per_cpu__##var |
1da177e4 LT |
60 | |
61 | #endif /* SMP */ | |
62 | ||
63 | #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name | |
64 | ||
65 | #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var) | |
66 | #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var) | |
67 | ||
68 | #endif /* _ASM_X8664_PERCPU_H_ */ |