1 /* $OpenBSD: atomic.h,v 1.3 2020/07/08 15:53:59 visa Exp $ */ 2 3 /* 4 * Copyright (c) 2017 Visa Hankala 5 * 6 * Permission to use, copy, modify, and/or distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #ifndef _OCTEON_ATOMIC_H_ 20 #define _OCTEON_ATOMIC_H_ 21 22 #ifdef _KERNEL 23 24 static inline void 25 octeon_syncw(void) 26 { 27 __asm__ volatile ( 28 " .set push\n" 29 " .set arch=octeon\n" 30 /* Issue the barrier twice to work around CN3xxx erratum Core-401. 31 * A single syncw might not enforce write ordering properly. */ 32 " syncw\n" 33 " syncw\n" 34 " .set pop\n" 35 : : : "memory"); 36 } 37 38 #define membar_consumer() __asm__ volatile ("" : : : "memory") 39 #define membar_producer() octeon_syncw() 40 41 #endif /* _KERNEL */ 42 43 #include <mips64/atomic.h> 44 45 #endif /* !_OCTEON_ATOMIC_H_ */ 46