projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |