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review.evervolv.com / android_kernel_htc_msm8960 / c2392df88afbb985d9396aa75c202830b471245d / . / arch / sh / include / asm / cmpxchg-llsc.h
blob: 47136661a203a96ad2c5d676fff377bf789cbafb [file] [log] [blame]
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]1#ifndef __ASM_SH_CMPXCHG_LLSC_H
2#define __ASM_SH_CMPXCHG_LLSC_H
3
4static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
5{
6 unsigned long retval;
7 unsigned long tmp;
8
9 __asm__ __volatile__ (
10 "1: \n\t"
Matt Fleming42990702009-01-20 21:14:37 +0000[diff] [blame]11 "movli.l @%2, %0 ! xchg_u32 \n\t"
12 "mov %0, %1 \n\t"
13 "mov %3, %0 \n\t"
14 "movco.l %0, @%2 \n\t"
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]15 "bf 1b \n\t"
16 "synco \n\t"
Matt Fleming42990702009-01-20 21:14:37 +0000[diff] [blame]17 : "=&z"(tmp), "=&r" (retval)
18 : "r" (m), "r" (val)
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]19 : "t", "memory"
20 );
21
22 return retval;
23}
24
25static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
26{
27 unsigned long retval;
28 unsigned long tmp;
29
30 __asm__ __volatile__ (
31 "1: \n\t"
Matt Fleming42990702009-01-20 21:14:37 +0000[diff] [blame]32 "movli.l @%2, %0 ! xchg_u8 \n\t"
33 "mov %0, %1 \n\t"
34 "mov %3, %0 \n\t"
35 "movco.l %0, @%2 \n\t"
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]36 "bf 1b \n\t"
37 "synco \n\t"
Matt Fleming42990702009-01-20 21:14:37 +0000[diff] [blame]38 : "=&z"(tmp), "=&r" (retval)
39 : "r" (m), "r" (val & 0xff)
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]40 : "t", "memory"
41 );
42
43 return retval;
44}
45
46static inline unsigned long
47__cmpxchg_u32(volatile int *m, unsigned long old, unsigned long new)
48{
49 unsigned long retval;
50 unsigned long tmp;
51
52 __asm__ __volatile__ (
53 "1: \n\t"
Matt Fleming42990702009-01-20 21:14:37 +0000[diff] [blame]54 "movli.l @%2, %0 ! __cmpxchg_u32 \n\t"
55 "mov %0, %1 \n\t"
56 "cmp/eq %1, %3 \n\t"
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]57 "bf 2f \n\t"
Aoi Shinkai4c7c9972009-06-10 16:15:42 +0000[diff] [blame]58 "mov %4, %0 \n\t"
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]59 "2: \n\t"
Matt Fleming42990702009-01-20 21:14:37 +0000[diff] [blame]60 "movco.l %0, @%2 \n\t"
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]61 "bf 1b \n\t"
62 "synco \n\t"
Matt Fleming42990702009-01-20 21:14:37 +0000[diff] [blame]63 : "=&z" (tmp), "=&r" (retval)
64 : "r" (m), "r" (old), "r" (new)
Paul Mundtee43a842008-08-07 18:01:43 +0900[diff] [blame]65 : "t", "memory"
66 );
67
68 return retval;
69}
70
71#endif /* __ASM_SH_CMPXCHG_LLSC_H */