Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[sfrench/cifs-2.6.git] / arch / arm64 / include / asm / lse.h
1 #ifndef __ASM_LSE_H
2 #define __ASM_LSE_H
3
4 #if defined(CONFIG_AS_LSE) && defined(CONFIG_ARM64_LSE_ATOMICS)
5
6 #include <linux/stringify.h>
7 #include <asm/alternative.h>
8
9 #ifdef __ASSEMBLER__
10
11 .arch_extension lse
12
13 .macro alt_lse, llsc, lse
14         alternative_insn "\llsc", "\lse", ARM64_HAS_LSE_ATOMICS
15 .endm
16
17 #else   /* __ASSEMBLER__ */
18
19 __asm__(".arch_extension        lse");
20
21 /* Move the ll/sc atomics out-of-line */
22 #define __LL_SC_INLINE          notrace
23 #define __LL_SC_PREFIX(x)       __ll_sc_##x
24 #define __LL_SC_EXPORT(x)       EXPORT_SYMBOL(__LL_SC_PREFIX(x))
25
26 /* Macro for constructing calls to out-of-line ll/sc atomics */
27 #define __LL_SC_CALL(op)        "bl\t" __stringify(__LL_SC_PREFIX(op)) "\n"
28 #define __LL_SC_CLOBBERS        "x16", "x17", "x30"
29
30 /* In-line patching at runtime */
31 #define ARM64_LSE_ATOMIC_INSN(llsc, lse)                                \
32         ALTERNATIVE(llsc, lse, ARM64_HAS_LSE_ATOMICS)
33
34 #endif  /* __ASSEMBLER__ */
35 #else   /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
36
37 #ifdef __ASSEMBLER__
38
39 .macro alt_lse, llsc, lse
40         \llsc
41 .endm
42
43 #else   /* __ASSEMBLER__ */
44
45 #define __LL_SC_INLINE          static inline
46 #define __LL_SC_PREFIX(x)       x
47 #define __LL_SC_EXPORT(x)
48
49 #define ARM64_LSE_ATOMIC_INSN(llsc, lse)        llsc
50
51 #endif  /* __ASSEMBLER__ */
52 #endif  /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
53 #endif  /* __ASM_LSE_H */