diff options
Diffstat (limited to 'include/asm_sparc.h')
-rw-r--r-- | include/asm_sparc.h | 92 |
1 files changed, 0 insertions, 92 deletions
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) \ | ||
11 | do { __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 | |||
20 | static inline void barrier(void) | ||
21 | { | ||
22 | mb(); | ||
23 | } | ||
24 | |||
25 | |||
26 | #define cpu_relax() barrier() | ||
27 | |||
28 | static inline int | ||
29 | cmpxchg(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 | |||
42 | typedef 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 | */ | ||
71 | static __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 | |||
85 | static __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 | |||