/* $NetBSD: acpi_func.h,v 1.2 2006/05/14 21:55:38 elad Exp $ */ /*- * Copyright (c) 2002 Mitsuru IWASAKI * 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. * * $FreeBSD: src/sys/ia64/include/acpica_machdep.h,v 1.4 2004/10/11 05:39:15 njl Exp $ */ /****************************************************************************** * * Name: acpica_machdep.h - arch-specific defines, etc. * $Revision: 1.2 $ * *****************************************************************************/ #ifndef _IA64_ACPI_FUNC_H_ #define _IA64_ACPI_FUNC_H_ #include #include /* Asm macros */ #define ACPI_ASM_MACROS #define BREAKPOINT3 #define ACPI_DISABLE_IRQS() disable_intr() #define ACPI_ENABLE_IRQS() enable_intr() #define ACPI_FLUSH_CPU_CACHE() /* XXX ia64_fc()? */ /* Section 5.2.9.1: global lock acquire/release functions */ extern int acpi_acquire_global_lock(uint32_t *lock); extern int acpi_release_global_lock(uint32_t *lock); #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \ ((Acq) = acpi_acquire_global_lock(GLptr)) #define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \ ((Acq) = acpi_release_global_lock(GLptr)) /* Section 5.2.9.1: global lock acquire/release functions */ #define GL_ACQUIRED (-1) #define GL_BUSY 0 #define GL_BIT_PENDING 0x1 #define GL_BIT_OWNED 0x2 #define GL_BIT_MASK (GL_BIT_PENDING | GL_BIT_OWNED) /* * Acquire the global lock. If busy, set the pending bit. The caller * will wait for notification from the BIOS that the lock is available * and then attempt to acquire it again. */ int acpi_acquire_global_lock(uint32_t *lock) { uint32_t new, old; do { old = *lock; new = ((old & ~GL_BIT_MASK) | GL_BIT_OWNED) | ((old >> 1) & GL_BIT_PENDING); } while (atomic_cmpset_acq_int(lock, old, new) == 0); return ((new < GL_BIT_MASK) ? GL_ACQUIRED : GL_BUSY); } /* * Release the global lock, returning whether there is a waiter pending. * If the BIOS set the pending bit, OSPM must notify the BIOS when it * releases the lock. */ int acpi_release_global_lock(uint32_t *lock) { uint32_t new, old; do { old = *lock; new = old & ~GL_BIT_MASK; } while (atomic_cmpset_rel_int(lock, old, new) == 0); return (old & GL_BIT_PENDING); } #endif /* _IA64_ACPI_FUNC_H_ */