/* * IA64 specific ACPICA environments and implementation * * Copyright (C) 2014, Intel Corporation * Author: Lv Zheng <lv.zheng@intel.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef _ASM_IA64_ACENV_H #define _ASM_IA64_ACENV_H #include <asm/intrinsics.h> #define COMPILER_DEPENDENT_INT64 long #define COMPILER_DEPENDENT_UINT64 unsigned long /* Asm macros */ static inline int ia64_acpi_acquire_global_lock(unsigned int *lock) { unsigned int old, new, val; do { old = *lock; new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); val = ia64_cmpxchg4_acq(lock, new, old); } while (unlikely (val != old)); return (new < 3) ? -1 : 0; } static inline int ia64_acpi_release_global_lock(unsigned int *lock) { unsigned int old, new, val; do { old = *lock; new = old & ~0x3; val = ia64_cmpxchg4_acq(lock, new, old); } while (unlikely (val != old)); return old & 0x1; } #define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \ ((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock)) #define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \ ((Acq) = ia64_acpi_release_global_lock(&facs->global_lock)) #endif /* _ASM_IA64_ACENV_H */