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0533f97b43
The contents of 'asm/atomic_arch.h' can be split across some of our other 'asm/' headers. Remove it. Reviewed-by: Andrew Murray <andrew.murray@arm.com> Signed-off-by: Will Deacon <will@kernel.org>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_LSE_H
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#define __ASM_LSE_H
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#include <asm/atomic_ll_sc.h>
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#if defined(CONFIG_AS_LSE) && defined(CONFIG_ARM64_LSE_ATOMICS)
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#include <linux/compiler_types.h>
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#include <linux/export.h>
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#include <linux/jump_label.h>
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#include <linux/stringify.h>
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#include <asm/alternative.h>
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#include <asm/atomic_lse.h>
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#include <asm/cpucaps.h>
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__asm__(".arch_extension lse");
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extern struct static_key_false cpu_hwcap_keys[ARM64_NCAPS];
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extern struct static_key_false arm64_const_caps_ready;
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static inline bool system_uses_lse_atomics(void)
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{
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return (static_branch_likely(&arm64_const_caps_ready)) &&
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static_branch_likely(&cpu_hwcap_keys[ARM64_HAS_LSE_ATOMICS]);
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}
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#define __lse_ll_sc_body(op, ...) \
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({ \
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system_uses_lse_atomics() ? \
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__lse_##op(__VA_ARGS__) : \
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__ll_sc_##op(__VA_ARGS__); \
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})
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/* In-line patching at runtime */
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#define ARM64_LSE_ATOMIC_INSN(llsc, lse) \
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ALTERNATIVE(llsc, lse, ARM64_HAS_LSE_ATOMICS)
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#else /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
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static inline bool system_uses_lse_atomics(void) { return false; }
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#define __lse_ll_sc_body(op, ...) __ll_sc_##op(__VA_ARGS__)
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#define ARM64_LSE_ATOMIC_INSN(llsc, lse) llsc
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#endif /* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
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#endif /* __ASM_LSE_H */
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