diff options
Diffstat (limited to 'include/asm-powerpc/futex.h')
-rw-r--r-- | include/asm-powerpc/futex.h | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/include/asm-powerpc/futex.h b/include/asm-powerpc/futex.h deleted file mode 100644 index 6d406c5c5de4..000000000000 --- a/include/asm-powerpc/futex.h +++ /dev/null | |||
@@ -1,117 +0,0 @@ | |||
1 | #ifndef _ASM_POWERPC_FUTEX_H | ||
2 | #define _ASM_POWERPC_FUTEX_H | ||
3 | |||
4 | #ifdef __KERNEL__ | ||
5 | |||
6 | #include <linux/futex.h> | ||
7 | #include <linux/uaccess.h> | ||
8 | #include <asm/errno.h> | ||
9 | #include <asm/synch.h> | ||
10 | #include <asm/asm-compat.h> | ||
11 | |||
12 | #define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \ | ||
13 | __asm__ __volatile ( \ | ||
14 | LWSYNC_ON_SMP \ | ||
15 | "1: lwarx %0,0,%2\n" \ | ||
16 | insn \ | ||
17 | PPC405_ERR77(0, %2) \ | ||
18 | "2: stwcx. %1,0,%2\n" \ | ||
19 | "bne- 1b\n" \ | ||
20 | "li %1,0\n" \ | ||
21 | "3: .section .fixup,\"ax\"\n" \ | ||
22 | "4: li %1,%3\n" \ | ||
23 | "b 3b\n" \ | ||
24 | ".previous\n" \ | ||
25 | ".section __ex_table,\"a\"\n" \ | ||
26 | ".align 3\n" \ | ||
27 | PPC_LONG "1b,4b,2b,4b\n" \ | ||
28 | ".previous" \ | ||
29 | : "=&r" (oldval), "=&r" (ret) \ | ||
30 | : "b" (uaddr), "i" (-EFAULT), "1" (oparg) \ | ||
31 | : "cr0", "memory") | ||
32 | |||
33 | static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr) | ||
34 | { | ||
35 | int op = (encoded_op >> 28) & 7; | ||
36 | int cmp = (encoded_op >> 24) & 15; | ||
37 | int oparg = (encoded_op << 8) >> 20; | ||
38 | int cmparg = (encoded_op << 20) >> 20; | ||
39 | int oldval = 0, ret; | ||
40 | if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) | ||
41 | oparg = 1 << oparg; | ||
42 | |||
43 | if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) | ||
44 | return -EFAULT; | ||
45 | |||
46 | pagefault_disable(); | ||
47 | |||
48 | switch (op) { | ||
49 | case FUTEX_OP_SET: | ||
50 | __futex_atomic_op("", ret, oldval, uaddr, oparg); | ||
51 | break; | ||
52 | case FUTEX_OP_ADD: | ||
53 | __futex_atomic_op("add %1,%0,%1\n", ret, oldval, uaddr, oparg); | ||
54 | break; | ||
55 | case FUTEX_OP_OR: | ||
56 | __futex_atomic_op("or %1,%0,%1\n", ret, oldval, uaddr, oparg); | ||
57 | break; | ||
58 | case FUTEX_OP_ANDN: | ||
59 | __futex_atomic_op("andc %1,%0,%1\n", ret, oldval, uaddr, oparg); | ||
60 | break; | ||
61 | case FUTEX_OP_XOR: | ||
62 | __futex_atomic_op("xor %1,%0,%1\n", ret, oldval, uaddr, oparg); | ||
63 | break; | ||
64 | default: | ||
65 | ret = -ENOSYS; | ||
66 | } | ||
67 | |||
68 | pagefault_enable(); | ||
69 | |||
70 | if (!ret) { | ||
71 | switch (cmp) { | ||
72 | case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; | ||
73 | case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; | ||
74 | case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; | ||
75 | case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; | ||
76 | case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; | ||
77 | case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; | ||
78 | default: ret = -ENOSYS; | ||
79 | } | ||
80 | } | ||
81 | return ret; | ||
82 | } | ||
83 | |||
84 | static inline int | ||
85 | futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) | ||
86 | { | ||
87 | int prev; | ||
88 | |||
89 | if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) | ||
90 | return -EFAULT; | ||
91 | |||
92 | __asm__ __volatile__ ( | ||
93 | LWSYNC_ON_SMP | ||
94 | "1: lwarx %0,0,%2 # futex_atomic_cmpxchg_inatomic\n\ | ||
95 | cmpw 0,%0,%3\n\ | ||
96 | bne- 3f\n" | ||
97 | PPC405_ERR77(0,%2) | ||
98 | "2: stwcx. %4,0,%2\n\ | ||
99 | bne- 1b\n" | ||
100 | ISYNC_ON_SMP | ||
101 | "3: .section .fixup,\"ax\"\n\ | ||
102 | 4: li %0,%5\n\ | ||
103 | b 3b\n\ | ||
104 | .previous\n\ | ||
105 | .section __ex_table,\"a\"\n\ | ||
106 | .align 3\n\ | ||
107 | " PPC_LONG "1b,4b,2b,4b\n\ | ||
108 | .previous" \ | ||
109 | : "=&r" (prev), "+m" (*uaddr) | ||
110 | : "r" (uaddr), "r" (oldval), "r" (newval), "i" (-EFAULT) | ||
111 | : "cc", "memory"); | ||
112 | |||
113 | return prev; | ||
114 | } | ||
115 | |||
116 | #endif /* __KERNEL__ */ | ||
117 | #endif /* _ASM_POWERPC_FUTEX_H */ | ||