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 */ 54