blob: eec95768eaad572938105ee4c0d904271cbf5aad (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_LSE_H
#define __ASM_LSE_H
#if defined(CONFIG_AS_LSE) && defined(CONFIG_ARM64_LSE_ATOMICS)
#include <linux/stringify.h>
#include <asm/alternative.h>
#ifdef __ASSEMBLER__
.arch_extension lse
.macro alt_lse, llsc, lse
alternative_insn "\llsc", "\lse", ARM64_HAS_LSE_ATOMICS
.endm
#else /* __ASSEMBLER__ */
__asm__(".arch_extension lse");
/* Move the ll/sc atomics out-of-line */
#define __LL_SC_INLINE notrace
#define __LL_SC_PREFIX(x) __ll_sc_##x
#define __LL_SC_EXPORT(x) EXPORT_SYMBOL(__LL_SC_PREFIX(x))
/* Macro for constructing calls to out-of-line ll/sc atomics */
#define __LL_SC_CALL(op) "bl\t" __stringify(__LL_SC_PREFIX(op)) "\n"
#define __LL_SC_CLOBBERS "x16", "x17", "x30"
/* In-line patching at runtime */
#define ARM64_LSE_ATOMIC_INSN(llsc, lse) \
ALTERNATIVE(llsc, lse, ARM64_HAS_LSE_ATOMICS)
#endif /* __ASSEMBLER__ */
#else /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
#ifdef __ASSEMBLER__
.macro alt_lse, llsc, lse
\llsc
.endm
#else /* __ASSEMBLER__ */
#define __LL_SC_INLINE static inline
#define __LL_SC_PREFIX(x) x
#define __LL_SC_EXPORT(x)
#define ARM64_LSE_ATOMIC_INSN(llsc, lse) llsc
#endif /* __ASSEMBLER__ */
#endif /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
#endif /* __ASM_LSE_H */
|
