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authorBjoern B. Brandenburg <bbb@cs.unc.edu>2010-11-06 16:46:55 -0400
committerBjoern B. Brandenburg <bbb@cs.unc.edu>2010-11-09 16:35:33 -0500
commit1e82ca830c3ad2fd057b4c4fc5243b0622526473 (patch)
treefacb2c86e48525b28619f3050a635184b6ecbddf /include
parentf8585fe1fc6f0830f900dad7c8ccc40e17f79644 (diff)
refactor: remove all architecture-dependent code from include/
Move the architecture-dependent code to the arch/ subtree.
Diffstat (limited to 'include')
-rw-r--r--include/asm.h15
-rw-r--r--include/asm_sparc.h92
-rw-r--r--include/asm_x86.h144
3 files changed, 0 insertions, 251 deletions
diff --git a/include/asm.h b/include/asm.h
deleted file mode 100644
index bc15fae..0000000
--- a/include/asm.h
+++ /dev/null
@@ -1,15 +0,0 @@
1/* liblitmus platform dependent includes */
2
3#ifndef ASM_H
4#define ASM_H
5
6#if defined(__i386__) || defined(__x86_64__)
7#include "asm_x86.h"
8#endif
9
10
11#ifdef __sparc__
12#include "asm_sparc.h"
13#endif
14
15#endif
diff --git a/include/asm_sparc.h b/include/asm_sparc.h
deleted file mode 100644
index 96c8049..0000000
--- a/include/asm_sparc.h
+++ /dev/null
@@ -1,92 +0,0 @@
1/* sparc64 assembly.
2 * Don't include directly, use asm.h instead.
3 *
4 * Most of this code comes straight out of the Linux kernel.
5 *
6 * The terms of the GPL v2 apply.
7 *
8 */
9
10#define membar_safe(type) \
11do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
12 " membar " type "\n" \
13 "1:\n" \
14 : : : "memory"); \
15} while (0)
16
17#define mb() \
18 membar_safe("#LoadLoad | #LoadStore | #StoreStore | #StoreLoad")
19
20static inline void barrier(void)
21{
22 mb();
23}
24
25
26#define cpu_relax() barrier()
27
28static inline int
29cmpxchg(volatile int *m, int old, int new)
30{
31 __asm__ __volatile__("membar #StoreLoad | #LoadLoad\n"
32 "cas [%2], %3, %0\n\t"
33 "membar #StoreLoad | #StoreStore"
34 : "=&r" (new)
35 : "0" (new), "r" (m), "r" (old)
36 : "memory");
37
38 return new;
39}
40
41
42typedef struct { int counter; } atomic_t;
43
44#define ATOMIC_INIT(i) { (i) }
45
46/**
47 * atomic_read - read atomic variable
48 * @v: pointer of type atomic_t
49 *
50 * Atomically reads the value of @v.
51 */
52#define atomic_read(v) ((v)->counter)
53
54/**
55 * atomic_set - set atomic variable
56 * @v: pointer of type atomic_t
57 * @i: required value
58 *
59 * Atomically sets the value of @v to @i.
60 */
61#define atomic_set(v,i) (((v)->counter) = (i))
62
63
64/**
65 * atomic_add_return - add and return
66 * @v: pointer of type atomic_t
67 * @i: integer value to add
68 *
69 * Atomically adds @i to @v and returns @i + @v
70 */
71static __inline__ int atomic_add_return(int i, atomic_t *v)
72{
73 int old;
74 int ret;
75 goto first;
76 do {
77 cpu_relax();
78 first:
79 old = atomic_read(v);
80 ret = cmpxchg(&v->counter, old, old + i);
81 } while (ret != old);
82 return old + i;
83}
84
85static __inline__ void atomic_add(int i, atomic_t *v)
86{
87 atomic_add_return(i, v);
88}
89
90#define atomic_inc_return(v) (atomic_add_return(1,v))
91
92
diff --git a/include/asm_x86.h b/include/asm_x86.h
deleted file mode 100644
index ccc6cce..0000000
--- a/include/asm_x86.h
+++ /dev/null
@@ -1,144 +0,0 @@
1/* Intel ia32 assembly.
2 * Don't include directly, use asm.h instead.
3 *
4 * Most of this code comes straight out of the Linux kernel.
5 *
6 * The terms of the GPL v2 apply.
7 */
8
9static inline void barrier(void)
10{
11 __asm__ __volatile__("mfence": : :"memory");
12}
13
14static __inline__ void cpu_relax(void)
15{
16 __asm__ __volatile("pause");
17}
18
19/* please, use these only if you _really_ know what you're doing
20 * ... and remember iopl(3) first!! (include sys/io.h)
21 */
22static inline void cli(void) {
23 asm volatile("cli": : :"memory");
24}
25
26static inline void sti(void) {
27 asm volatile("sti": : :"memory");
28}
29
30typedef struct { int counter; } atomic_t;
31
32#ifdef __i386__
33
34#define ATOMIC_INIT(i) { (i) }
35
36/**
37 * atomic_read - read atomic variable
38 * @v: pointer of type atomic_t
39 *
40 * Atomically reads the value of @v.
41 */
42#define atomic_read(v) ((v)->counter)
43
44/**
45 * atomic_set - set atomic variable
46 * @v: pointer of type atomic_t
47 * @i: required value
48 *
49 * Atomically sets the value of @v to @i.
50 */
51#define atomic_set(v,i) (((v)->counter) = (i))
52
53static __inline__ void atomic_add(int i, atomic_t *v)
54{
55 __asm__ __volatile__(
56 "lock; addl %1,%0"
57 :"+m" (v->counter)
58 :"ir" (i));
59}
60
61/**
62 * atomic_add_return - add and return
63 * @v: pointer of type atomic_t
64 * @i: integer value to add
65 *
66 * Atomically adds @i to @v and returns @i + @v
67 */
68static __inline__ int atomic_add_return(int i, atomic_t *v)
69{
70 int __i;
71 __i = i;
72 __asm__ __volatile__(
73 "lock; xaddl %0, %1"
74 :"+r" (i), "+m" (v->counter)
75 : : "memory");
76 return i + __i;
77}
78
79#define atomic_inc_return(v) (atomic_add_return(1,v))
80
81#elif defined(__x86_64__)
82
83/* almost the same as i386, but extra care must be taken when
84 * specifying clobbered registers
85 */
86
87#define ATOMIC_INIT(i) { (i) }
88
89/**
90 * atomic_read - read atomic variable
91 * @v: pointer of type atomic_t
92 *
93 * Atomically reads the value of @v.
94 */
95static inline int atomic_read(const atomic_t *v)
96{
97 return v->counter;
98}
99
100/**
101 * atomic_set - set atomic variable
102 * @v: pointer of type atomic_t
103 * @i: required value
104 *
105 * Atomically sets the value of @v to @i.
106 */
107static inline void atomic_set(atomic_t *v, int i)
108{
109 v->counter = i;
110}
111
112/**
113 * atomic_add - add integer to atomic variable
114 * @i: integer value to add
115 * @v: pointer of type atomic_t
116 *
117 * Atomically adds @i to @v.
118 */
119static inline void atomic_add(int i, atomic_t *v)
120{
121 asm volatile("lock; addl %1,%0"
122 : "=m" (v->counter)
123 : "ir" (i), "m" (v->counter));
124}
125
126/**
127 * atomic_add_return - add and return
128 * @i: integer value to add
129 * @v: pointer of type atomic_t
130 *
131 * Atomically adds @i to @v and returns @i + @v
132 */
133static inline int atomic_add_return(int i, atomic_t *v)
134{
135 int __i = i;
136 asm volatile("lock; xaddl %0, %1"
137 : "+r" (i), "+m" (v->counter)
138 : : "memory");
139 return i + __i;
140}
141
142#define atomic_inc_return(v) (atomic_add_return(1, v))
143
144#endif
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