/* $NetBSD: acpi_func.h,v 1.6.30.1 2023/08/01 15:35:38 martin Exp $ */ /*- * Copyright (c) 2000 Michael Smith * Copyright (c) 2000 BSDi * Copyright (c) 2007-2009 Jung-uk Kim * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _SYS_DEV_ACPI_ACPICA_ACPI_FUNC_H #define _SYS_DEV_ACPI_ACPICA_ACPI_FUNC_H #include #include #define GL_ACQUIRED (-1) #define GL_BUSY 0 #define GL_BIT_PENDING 1 #define GL_BIT_OWNED 2 #define GL_BIT_MASK (GL_BIT_PENDING | GL_BIT_OWNED) #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \ do { \ (Acq) = acpi_acquire_global_lock(&((GLptr)->GlobalLock)); \ } while (0) #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \ do { \ (Acq) = acpi_release_global_lock(&((GLptr)->GlobalLock)); \ } while (0) static __inline int acpi_acquire_global_lock(uint32_t *lock) { uint32_t new, old, val; do { old = *lock; new = ((old & ~GL_BIT_MASK) | GL_BIT_OWNED) | ((old >> 1) & GL_BIT_PENDING); val = atomic_cas_32(lock, old, new); } while (__predict_false(val != old)); membar_acquire(); return ((new < GL_BIT_MASK) ? GL_ACQUIRED : GL_BUSY); } static __inline int acpi_release_global_lock(uint32_t *lock) { uint32_t new, old, val; membar_release(); do { old = *lock; new = old & ~GL_BIT_MASK; val = atomic_cas_32(lock, old, new); } while (__predict_false(val != old)); return old & GL_BIT_PENDING; } /* * XXX: Should be in a MD header. */ #if defined(__ia64__) #define ACPI_FLUSH_CPU_CACHE() /* XXX: ia64_fc()? */ #elif defined(__aarch64__) #define ACPI_FLUSH_CPU_CACHE() cpu_dcache_wbinv_all() #else #define ACPI_FLUSH_CPU_CACHE() wbinvd() #endif #endif /* !_SYS_DEV_ACPI_ACPICA_ACPI_FUNC_H */