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ebac4655 JA |
1 | #ifndef ARCH_IA64_H |
2 | #define ARCH_IA64_H | |
3 | ||
4 | #define ARCH (arch_ia64) | |
5 | ||
6 | #ifndef __NR_ioprio_set | |
7 | #define __NR_ioprio_set 1274 | |
8 | #define __NR_ioprio_get 1275 | |
9 | #endif | |
10 | ||
11 | #ifndef __NR_fadvise64 | |
12 | #define __NR_fadvise64 1234 | |
13 | #endif | |
14 | ||
8756e4d4 JA |
15 | #ifndef __NR_sys_splice |
16 | #define __NR_sys_splice 1297 | |
17 | #define __NR_sys_tee 1301 | |
18 | #define __NR_sys_vmsplice 1302 | |
19 | #endif | |
20 | ||
db6defc7 JA |
21 | #define nop asm volatile ("hint @pause" ::: "memory"); |
22 | #define read_barrier() asm volatile ("mf" ::: "memory") | |
44c47feb | 23 | #define writebarrier() asm volatile ("mf" ::: "memory") |
ebac4655 | 24 | |
8f7e39dd JA |
25 | #define ia64_popcnt(x) \ |
26 | ({ \ | |
27 | unsigned long ia64_intri_res; \ | |
28 | asm ("popcnt %0=%1" : "=r" (ia64_intri_res) : "r" (x)); \ | |
29 | ia64_intri_res; \ | |
30 | }) | |
31 | ||
32 | static inline unsigned long arch_ffz(unsigned long bitmask) | |
33 | { | |
34 | return ia64_popcnt(bitmask & (~bitmask - 1)); | |
35 | } | |
36 | #define ARCH_HAVE_FFZ | |
37 | ||
69ebbd39 JA |
38 | typedef struct { |
39 | volatile unsigned int lock; | |
40 | } spinlock_t; | |
41 | ||
42 | #define IA64_SPINLOCK_CLOBBERS "ar.ccv", "ar.pfs", "p14", "p15", "r27", "r28", "r29", "r30", "b6", "memory" | |
43 | ||
44 | static inline void spin_lock(spinlock_t *lock) | |
45 | { | |
46 | register volatile unsigned int *ptr asm ("r31") = &lock->lock; | |
47 | unsigned long flags = 0; | |
48 | ||
49 | __asm__ __volatile__("{\n\t" | |
50 | " mov ar.ccv = r0\n\t" | |
51 | " mov r28 = ip\n\t" | |
52 | " mov r30 = 1;;\n\t" | |
53 | "}\n\t" | |
54 | "cmpxchg4.acq r30 = [%1], r30, ar.ccv\n\t" | |
55 | "movl r29 = ia64_spinlock_contention_pre3_4;;\n\t" | |
56 | "cmp4.ne p14, p0 = r30, r0\n\t" | |
57 | "mov b6 = r29;;\n\t" | |
58 | "mov r27=%2\n\t" | |
59 | "(p14) br.cond.spnt.many b6" | |
60 | : "=r"(ptr) : "r"(ptr), "r" (flags) | |
61 | : IA64_SPINLOCK_CLOBBERS); | |
62 | } | |
63 | ||
64 | static inline void spin_unlock(spinlock_t *lock) | |
65 | { | |
66 | read_barrier(); | |
67 | __asm__ __volatile__("st4.rel.nta [%0] = r0\n\t" :: "r" (lock)); | |
68 | } | |
69 | ||
61a179a8 JA |
70 | #define __SPIN_LOCK_UNLOCKED { 0 } |
71 | ||
ebac4655 | 72 | #endif |