diff options
Diffstat (limited to 'include/asm-alpha/percpu.h')
-rw-r--r-- | include/asm-alpha/percpu.h | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/include/asm-alpha/percpu.h b/include/asm-alpha/percpu.h deleted file mode 100644 index 3495e8e00d70..000000000000 --- a/include/asm-alpha/percpu.h +++ /dev/null | |||
@@ -1,78 +0,0 @@ | |||
1 | #ifndef __ALPHA_PERCPU_H | ||
2 | #define __ALPHA_PERCPU_H | ||
3 | #include <linux/compiler.h> | ||
4 | #include <linux/threads.h> | ||
5 | |||
6 | /* | ||
7 | * Determine the real variable name from the name visible in the | ||
8 | * kernel sources. | ||
9 | */ | ||
10 | #define per_cpu_var(var) per_cpu__##var | ||
11 | |||
12 | #ifdef CONFIG_SMP | ||
13 | |||
14 | /* | ||
15 | * per_cpu_offset() is the offset that has to be added to a | ||
16 | * percpu variable to get to the instance for a certain processor. | ||
17 | */ | ||
18 | extern unsigned long __per_cpu_offset[NR_CPUS]; | ||
19 | |||
20 | #define per_cpu_offset(x) (__per_cpu_offset[x]) | ||
21 | |||
22 | #define __my_cpu_offset per_cpu_offset(raw_smp_processor_id()) | ||
23 | #ifdef CONFIG_DEBUG_PREEMPT | ||
24 | #define my_cpu_offset per_cpu_offset(smp_processor_id()) | ||
25 | #else | ||
26 | #define my_cpu_offset __my_cpu_offset | ||
27 | #endif | ||
28 | |||
29 | #ifndef MODULE | ||
30 | #define SHIFT_PERCPU_PTR(var, offset) RELOC_HIDE(&per_cpu_var(var), (offset)) | ||
31 | #define PER_CPU_ATTRIBUTES | ||
32 | #else | ||
33 | /* | ||
34 | * To calculate addresses of locally defined variables, GCC uses 32-bit | ||
35 | * displacement from the GP. Which doesn't work for per cpu variables in | ||
36 | * modules, as an offset to the kernel per cpu area is way above 4G. | ||
37 | * | ||
38 | * This forces allocation of a GOT entry for per cpu variable using | ||
39 | * ldq instruction with a 'literal' relocation. | ||
40 | */ | ||
41 | #define SHIFT_PERCPU_PTR(var, offset) ({ \ | ||
42 | extern int simple_identifier_##var(void); \ | ||
43 | unsigned long __ptr, tmp_gp; \ | ||
44 | asm ( "br %1, 1f \n\ | ||
45 | 1: ldgp %1, 0(%1) \n\ | ||
46 | ldq %0, per_cpu__" #var"(%1)\t!literal" \ | ||
47 | : "=&r"(__ptr), "=&r"(tmp_gp)); \ | ||
48 | (typeof(&per_cpu_var(var)))(__ptr + (offset)); }) | ||
49 | |||
50 | #define PER_CPU_ATTRIBUTES __used | ||
51 | |||
52 | #endif /* MODULE */ | ||
53 | |||
54 | /* | ||
55 | * A percpu variable may point to a discarded regions. The following are | ||
56 | * established ways to produce a usable pointer from the percpu variable | ||
57 | * offset. | ||
58 | */ | ||
59 | #define per_cpu(var, cpu) \ | ||
60 | (*SHIFT_PERCPU_PTR(var, per_cpu_offset(cpu))) | ||
61 | #define __get_cpu_var(var) \ | ||
62 | (*SHIFT_PERCPU_PTR(var, my_cpu_offset)) | ||
63 | #define __raw_get_cpu_var(var) \ | ||
64 | (*SHIFT_PERCPU_PTR(var, __my_cpu_offset)) | ||
65 | |||
66 | #else /* ! SMP */ | ||
67 | |||
68 | #define per_cpu(var, cpu) (*((void)(cpu), &per_cpu_var(var))) | ||
69 | #define __get_cpu_var(var) per_cpu_var(var) | ||
70 | #define __raw_get_cpu_var(var) per_cpu_var(var) | ||
71 | |||
72 | #define PER_CPU_ATTRIBUTES | ||
73 | |||
74 | #endif /* SMP */ | ||
75 | |||
76 | #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu_var(name) | ||
77 | |||
78 | #endif /* __ALPHA_PERCPU_H */ | ||