87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
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/* SPDX-License-Identifier: X11 OR MIT OR AGPL-3.0-or-later
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*
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* @brief platform/architecture specific memory barrier functions
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*
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* Copyright © 2026 Enrico Weigelt, metux IT consult <info@metux.net>
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*/
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#ifndef __XLIBRE_SDK_MEMBARRIER_H
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#define __XLIBRE_SDK_MEMBARRIER_H
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__attribute__((always_inline)) static inline void xlibre_mem_barrier_read(void)
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{
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#ifdef __i386__
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# ifdef __SSE2__
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__asm__ __volatile__ ("mfence" : : : "memory");
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# else
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__asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory");
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# endif
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#elif defined __alpha__
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__asm__ __volatile__ ("mb" : : : "memory");
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#elif defined __amd64__
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__asm__ __volatile__ ("mfence" : : : "memory");
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#elif defined __ia64__
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__asm__ __volatile__ ("mf" : : : "memory");
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#elif defined __mips__
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__asm__ __volatile__(
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".set push\n\t"
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".set noreorder\n\t"
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".set mips2\n\t"
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"sync\n\t"
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".set pop"
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: /* no output */
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: /* no input */
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: "memory");
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#elif defined __powerpc__
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# if defined(__powerpc64__) || !defined(__has_builtin) || !__has_builtin(__builtin_ppc_eieio)
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__asm__ __volatile__ ("eieio" : : : "memory");
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# else
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__builtin_ppc_eieio();
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# endif
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#elif defined __sparc__
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/* NOP */
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#endif
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}
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__attribute__((always_inline)) static inline void xlibre_mem_barrier_write(void)
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{
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#ifdef __i386__
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#ifdef __SSE__
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__asm__ __volatile__ ("sfence" : : : "memory");
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#else
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__asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory");
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#endif
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#elif defined __alpha__
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__asm__ __volatile__ ("wmb" : : : "memory");
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#elif defined __amd64__
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__asm__ __volatile__ ("sfence" : : : "memory");
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#elif defined __ia64__
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__asm__ __volatile__ ("mf" : : : "memory");
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#elif defined __mips__
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xlibre_mem_barrier_read();
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#elif defined __powerpc__
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# if defined(__powerpc64__) || !defined(__has_builtin) || !__has_builtin(__builtin_ppc_eieio)
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__asm__ __volatile__ ("eieio" : : : "memory");
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# else
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__builtin_ppc_eieio();
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# endif
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#elif defined __sparc__
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/* NOP */
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#endif
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}
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/*
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* @deprecated just backwards compat with older drivers - will be removed in ABI-26
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*/
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__attribute__((always_inline)) static inline void mem_barrier(void) {
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xlibre_mem_barrier_read();
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}
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/*
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* @deprecated just backwards compat with older drivers - will be removed in ABI-26
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*/
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__attribute__((always_inline)) static inline void write_mem_barrier(void) {
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xlibre_mem_barrier_write();
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}
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#endif /* __XLIBRE_SDK_MEMBARRIER_H */
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