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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c09d6a04 WD |
2 | #ifndef __ASM_LSE_H |
3 | #define __ASM_LSE_H | |
4 | ||
5 | #if defined(CONFIG_AS_LSE) && defined(CONFIG_ARM64_LSE_ATOMICS) | |
6 | ||
7 | #include <linux/stringify.h> | |
c09d6a04 | 8 | #include <asm/alternative.h> |
c09d6a04 | 9 | |
084f9037 WD |
10 | #ifdef __ASSEMBLER__ |
11 | ||
12 | .arch_extension lse | |
13 | ||
14 | .macro alt_lse, llsc, lse | |
c739dc83 | 15 | alternative_insn "\llsc", "\lse", ARM64_HAS_LSE_ATOMICS |
084f9037 WD |
16 | .endm |
17 | ||
18 | #else /* __ASSEMBLER__ */ | |
19 | ||
c09d6a04 WD |
20 | __asm__(".arch_extension lse"); |
21 | ||
22 | /* Move the ll/sc atomics out-of-line */ | |
b7eed6dd | 23 | #define __LL_SC_INLINE notrace |
c09d6a04 WD |
24 | #define __LL_SC_PREFIX(x) __ll_sc_##x |
25 | #define __LL_SC_EXPORT(x) EXPORT_SYMBOL(__LL_SC_PREFIX(x)) | |
26 | ||
27 | /* Macro for constructing calls to out-of-line ll/sc atomics */ | |
28 | #define __LL_SC_CALL(op) "bl\t" __stringify(__LL_SC_PREFIX(op)) "\n" | |
5be8b70a | 29 | #define __LL_SC_CLOBBERS "x16", "x17", "x30" |
c09d6a04 WD |
30 | |
31 | /* In-line patching at runtime */ | |
32 | #define ARM64_LSE_ATOMIC_INSN(llsc, lse) \ | |
c739dc83 | 33 | ALTERNATIVE(llsc, lse, ARM64_HAS_LSE_ATOMICS) |
c09d6a04 | 34 | |
084f9037 WD |
35 | #endif /* __ASSEMBLER__ */ |
36 | #else /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */ | |
37 | ||
38 | #ifdef __ASSEMBLER__ | |
39 | ||
40 | .macro alt_lse, llsc, lse | |
41 | \llsc | |
42 | .endm | |
43 | ||
44 | #else /* __ASSEMBLER__ */ | |
c09d6a04 WD |
45 | |
46 | #define __LL_SC_INLINE static inline | |
47 | #define __LL_SC_PREFIX(x) x | |
48 | #define __LL_SC_EXPORT(x) | |
49 | ||
50 | #define ARM64_LSE_ATOMIC_INSN(llsc, lse) llsc | |
51 | ||
084f9037 | 52 | #endif /* __ASSEMBLER__ */ |
c09d6a04 WD |
53 | #endif /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */ |
54 | #endif /* __ASM_LSE_H */ |