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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 05:20:03 -0400
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 05:20:03 -0400
commit96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42 (patch)
treed947a467aa2da3140279617bc4b9b101640d7bf4 /include/asm-i386/percpu.h
parent27bd0c955648646abf2a353a8371d28c37bcd982 (diff)
i386/x86_64: move headers to include/asm-x86
Move the headers to include/asm-x86 and fixup the header install make rules Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-i386/percpu.h')
-rw-r--r--include/asm-i386/percpu.h154
1 files changed, 0 insertions, 154 deletions
diff --git a/include/asm-i386/percpu.h b/include/asm-i386/percpu.h
deleted file mode 100644
index a7ebd436f3cc..000000000000
--- a/include/asm-i386/percpu.h
+++ /dev/null
@@ -1,154 +0,0 @@
1#ifndef __ARCH_I386_PERCPU__
2#define __ARCH_I386_PERCPU__
3
4#ifdef __ASSEMBLY__
5
6/*
7 * PER_CPU finds an address of a per-cpu variable.
8 *
9 * Args:
10 * var - variable name
11 * reg - 32bit register
12 *
13 * The resulting address is stored in the "reg" argument.
14 *
15 * Example:
16 * PER_CPU(cpu_gdt_descr, %ebx)
17 */
18#ifdef CONFIG_SMP
19#define PER_CPU(var, reg) \
20 movl %fs:per_cpu__##this_cpu_off, reg; \
21 lea per_cpu__##var(reg), reg
22#define PER_CPU_VAR(var) %fs:per_cpu__##var
23#else /* ! SMP */
24#define PER_CPU(var, reg) \
25 movl $per_cpu__##var, reg
26#define PER_CPU_VAR(var) per_cpu__##var
27#endif /* SMP */
28
29#else /* ...!ASSEMBLY */
30
31/*
32 * PER_CPU finds an address of a per-cpu variable.
33 *
34 * Args:
35 * var - variable name
36 * cpu - 32bit register containing the current CPU number
37 *
38 * The resulting address is stored in the "cpu" argument.
39 *
40 * Example:
41 * PER_CPU(cpu_gdt_descr, %ebx)
42 */
43#ifdef CONFIG_SMP
44/* Same as generic implementation except for optimized local access. */
45#define __GENERIC_PER_CPU
46
47/* This is used for other cpus to find our section. */
48extern unsigned long __per_cpu_offset[];
49
50#define per_cpu_offset(x) (__per_cpu_offset[x])
51
52/* Separate out the type, so (int[3], foo) works. */
53#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
54#define DEFINE_PER_CPU(type, name) \
55 __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
56
57#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
58 __attribute__((__section__(".data.percpu.shared_aligned"))) \
59 __typeof__(type) per_cpu__##name \
60 ____cacheline_aligned_in_smp
61
62/* We can use this directly for local CPU (faster). */
63DECLARE_PER_CPU(unsigned long, this_cpu_off);
64
65/* var is in discarded region: offset to particular copy we want */
66#define per_cpu(var, cpu) (*({ \
67 extern int simple_indentifier_##var(void); \
68 RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]); }))
69
70#define __raw_get_cpu_var(var) (*({ \
71 extern int simple_indentifier_##var(void); \
72 RELOC_HIDE(&per_cpu__##var, x86_read_percpu(this_cpu_off)); \
73}))
74
75#define __get_cpu_var(var) __raw_get_cpu_var(var)
76
77/* A macro to avoid #include hell... */
78#define percpu_modcopy(pcpudst, src, size) \
79do { \
80 unsigned int __i; \
81 for_each_possible_cpu(__i) \
82 memcpy((pcpudst)+__per_cpu_offset[__i], \
83 (src), (size)); \
84} while (0)
85
86#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
87#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
88
89/* fs segment starts at (positive) offset == __per_cpu_offset[cpu] */
90#define __percpu_seg "%%fs:"
91#else /* !SMP */
92#include <asm-generic/percpu.h>
93#define __percpu_seg ""
94#endif /* SMP */
95
96/* For arch-specific code, we can use direct single-insn ops (they
97 * don't give an lvalue though). */
98extern void __bad_percpu_size(void);
99
100#define percpu_to_op(op,var,val) \
101 do { \
102 typedef typeof(var) T__; \
103 if (0) { T__ tmp__; tmp__ = (val); } \
104 switch (sizeof(var)) { \
105 case 1: \
106 asm(op "b %1,"__percpu_seg"%0" \
107 : "+m" (var) \
108 :"ri" ((T__)val)); \
109 break; \
110 case 2: \
111 asm(op "w %1,"__percpu_seg"%0" \
112 : "+m" (var) \
113 :"ri" ((T__)val)); \
114 break; \
115 case 4: \
116 asm(op "l %1,"__percpu_seg"%0" \
117 : "+m" (var) \
118 :"ri" ((T__)val)); \
119 break; \
120 default: __bad_percpu_size(); \
121 } \
122 } while (0)
123
124#define percpu_from_op(op,var) \
125 ({ \
126 typeof(var) ret__; \
127 switch (sizeof(var)) { \
128 case 1: \
129 asm(op "b "__percpu_seg"%1,%0" \
130 : "=r" (ret__) \
131 : "m" (var)); \
132 break; \
133 case 2: \
134 asm(op "w "__percpu_seg"%1,%0" \
135 : "=r" (ret__) \
136 : "m" (var)); \
137 break; \
138 case 4: \
139 asm(op "l "__percpu_seg"%1,%0" \
140 : "=r" (ret__) \
141 : "m" (var)); \
142 break; \
143 default: __bad_percpu_size(); \
144 } \
145 ret__; })
146
147#define x86_read_percpu(var) percpu_from_op("mov", per_cpu__##var)
148#define x86_write_percpu(var,val) percpu_to_op("mov", per_cpu__##var, val)
149#define x86_add_percpu(var,val) percpu_to_op("add", per_cpu__##var, val)
150#define x86_sub_percpu(var,val) percpu_to_op("sub", per_cpu__##var, val)
151#define x86_or_percpu(var,val) percpu_to_op("or", per_cpu__##var, val)
152#endif /* !__ASSEMBLY__ */
153
154#endif /* __ARCH_I386_PERCPU__ */
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