diff options
author | Paul Mundt <lethal@linux-sh.org> | 2008-08-07 05:01:43 -0400 |
---|---|---|
committer | Paul Mundt <lethal@linux-sh.org> | 2008-09-07 21:35:02 -0400 |
commit | ee43a8442bd7a5d611f11958e6f8c8953d26f907 (patch) | |
tree | f0ccd147aa44c123079b3d6a92b3719d29d31fcb /arch/sh/include/asm/cmpxchg-llsc.h | |
parent | 742fd1bcfb475c702c9b1dd6afc79c08f8dbf7dd (diff) |
sh: Provide movli.l/movco.l-based cmpxchg.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include/asm/cmpxchg-llsc.h')
-rw-r--r-- | arch/sh/include/asm/cmpxchg-llsc.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/sh/include/asm/cmpxchg-llsc.h b/arch/sh/include/asm/cmpxchg-llsc.h new file mode 100644 index 000000000000..aee3bf286581 --- /dev/null +++ b/arch/sh/include/asm/cmpxchg-llsc.h | |||
@@ -0,0 +1,71 @@ | |||
1 | #ifndef __ASM_SH_CMPXCHG_LLSC_H | ||
2 | #define __ASM_SH_CMPXCHG_LLSC_H | ||
3 | |||
4 | static 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" | ||
11 | "movli.l @%1, %0 ! xchg_u32 \n\t" | ||
12 | "mov %0, %2 \n\t" | ||
13 | "mov %4, %0 \n\t" | ||
14 | "movco.l %0, @%1 \n\t" | ||
15 | "bf 1b \n\t" | ||
16 | "synco \n\t" | ||
17 | : "=&z"(tmp), "=r" (m), "=&r" (retval) | ||
18 | : "1" (m), "r" (val) | ||
19 | : "t", "memory" | ||
20 | ); | ||
21 | |||
22 | return retval; | ||
23 | } | ||
24 | |||
25 | static 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" | ||
32 | "movli.l @%1, %0 ! xchg_u8 \n\t" | ||
33 | "mov %0, %2 \n\t" | ||
34 | "mov %4, %0 \n\t" | ||
35 | "movco.l %0, @%1 \n\t" | ||
36 | "bf 1b \n\t" | ||
37 | "synco \n\t" | ||
38 | : "=&z"(tmp), "=r" (m), "=&r" (retval) | ||
39 | : "1" (m), "r" (val & 0xff) | ||
40 | : "t", "memory" | ||
41 | ); | ||
42 | |||
43 | return retval; | ||
44 | } | ||
45 | |||
46 | static 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" | ||
54 | "movli.l @%1, %0 ! __cmpxchg_u32 \n\t" | ||
55 | "mov %0, %2 \n\t" | ||
56 | "cmp/eq %2, %4 \n\t" | ||
57 | "bf 2f \n\t" | ||
58 | "mov %5, %0 \n\t" | ||
59 | "2: \n\t" | ||
60 | "movco.l %0, @%1 \n\t" | ||
61 | "bf 1b \n\t" | ||
62 | "synco \n\t" | ||
63 | : "=&z" (tmp), "=r" (m), "=&r" (retval) | ||
64 | : "1" (m), "r" (old), "r" (new) | ||
65 | : "t", "memory" | ||
66 | ); | ||
67 | |||
68 | return retval; | ||
69 | } | ||
70 | |||
71 | #endif /* __ASM_SH_CMPXCHG_LLSC_H */ | ||