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c09d6a04 WD |
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> | |
c09d6a04 WD |
7 | #include <asm/alternative.h> |
8 | #include <asm/cpufeature.h> | |
9 | ||
084f9037 WD |
10 | #ifdef __ASSEMBLER__ |
11 | ||
12 | .arch_extension lse | |
13 | ||
14 | .macro alt_lse, llsc, lse | |
15 | alternative_insn "\llsc", "\lse", ARM64_CPU_FEAT_LSE_ATOMICS | |
16 | .endm | |
17 | ||
18 | #else /* __ASSEMBLER__ */ | |
19 | ||
c09d6a04 WD |
20 | __asm__(".arch_extension lse"); |
21 | ||
22 | /* Move the ll/sc atomics out-of-line */ | |
23 | #define __LL_SC_INLINE | |
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" | |
29 | ||
30 | /* In-line patching at runtime */ | |
31 | #define ARM64_LSE_ATOMIC_INSN(llsc, lse) \ | |
32 | ALTERNATIVE(llsc, lse, ARM64_CPU_FEAT_LSE_ATOMICS) | |
33 | ||
084f9037 WD |
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__ */ | |
c09d6a04 WD |
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 | ||
084f9037 | 51 | #endif /* __ASSEMBLER__ */ |
c09d6a04 WD |
52 | #endif /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */ |
53 | #endif /* __ASM_LSE_H */ |