Commit | Line | Data |
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697a606c JA |
1 | #ifndef ARCH_SPARC_H |
2 | #define ARCH_SPARC_H | |
3 | ||
4 | #define ARCH (arch_sparc) | |
5 | ||
6 | #ifndef __NR_ioprio_set | |
7 | #define __NR_ioprio_set 196 | |
8 | #define __NR_ioprio_get 218 | |
9 | #endif | |
10 | ||
11 | #ifndef __NR_fadvise64 | |
12 | #define __NR_fadvise64 209 | |
13 | #endif | |
14 | ||
15 | #ifndef __NR_sys_splice | |
16 | #define __NR_sys_splice 232 | |
17 | #define __NR_sys_tee 280 | |
18 | #define __NR_sys_vmsplice 25 | |
19 | #endif | |
20 | ||
21 | #define nop do { } while (0) | |
22 | ||
23 | #define read_barrier() __asm__ __volatile__ ("" : : : "memory") | |
44c47feb | 24 | #define write_barrier() __asm__ __volatile__ ("" : : : "memory") |
697a606c | 25 | |
69ebbd39 JA |
26 | typedef struct { |
27 | volatile unsigned char lock; | |
28 | } spinlock_t; | |
29 | ||
30 | static inline void spin_lock(spinlock_t *lock) | |
31 | { | |
32 | __asm__ __volatile__( | |
33 | "\n1:\n\t" | |
34 | "ldstub [%0], %%g2\n\t" | |
35 | "orcc %%g2, 0x0, %%g0\n\t" | |
36 | "bne,a 2f\n\t" | |
37 | " ldub [%0], %%g2\n\t" | |
38 | ".subsection 2\n" | |
39 | "2:\n\t" | |
40 | "orcc %%g2, 0x0, %%g0\n\t" | |
41 | "bne,a 2b\n\t" | |
42 | " ldub [%0], %%g2\n\t" | |
43 | "b,a 1b\n\t" | |
44 | ".previous\n" | |
45 | : /* no outputs */ | |
46 | : "r" (lock) | |
47 | : "g2", "memory", "cc"); | |
48 | } | |
49 | ||
50 | static inline void spin_unlock(spinlock_t *lock) | |
51 | { | |
52 | __asm__ __volatile__("stb %%g0, [%0]" : : "r" (lock) : "memory"); | |
53 | } | |
54 | ||
697a606c | 55 | #endif |