[linux-2.6-block.git] / arch / ia64 / include / asm / acenv.h

/*
 * 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 */
Commit	Line	Data
07d83914 LZ	1	/*
	2	* IA64 specific ACPICA environments and implementation
	3	*
	4	* Copyright (C) 2014, Intel Corporation
	5	* Author: Lv Zheng <lv.zheng@intel.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#ifndef _ASM_IA64_ACENV_H
	13	#define _ASM_IA64_ACENV_H
	14
	15	#include <asm/intrinsics.h>
	16
	17	#define COMPILER_DEPENDENT_INT64 long
	18	#define COMPILER_DEPENDENT_UINT64 unsigned long
	19
07d83914 LZ	20	/* Asm macros */
07d83914 LZ	21
07d83914 LZ	22	static inline int
	23	ia64_acpi_acquire_global_lock(unsigned int *lock)
	24	{
	25	unsigned int old, new, val;
	26	do {
	27	old = *lock;
	28	new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
	29	val = ia64_cmpxchg4_acq(lock, new, old);
	30	} while (unlikely (val != old));
	31	return (new < 3) ? -1 : 0;
	32	}
	33
	34	static inline int
	35	ia64_acpi_release_global_lock(unsigned int *lock)
	36	{
	37	unsigned int old, new, val;
	38	do {
	39	old = *lock;
	40	new = old & ~0x3;
	41	val = ia64_cmpxchg4_acq(lock, new, old);
	42	} while (unlikely (val != old));
	43	return old & 0x1;
	44	}
	45
	46	#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
	47	((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock))
	48
	49	#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
	50	((Acq) = ia64_acpi_release_global_lock(&facs->global_lock))
	51
07d83914	52	#endif /* _ASM_IA64_ACENV_H */