[mirror_ubuntu-eoan-kernel.git] / arch / ia64 / include / asm / acenv.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * IA64 specific ACPICA environments and implementation
 *
 * Copyright (C) 2014, Intel Corporation
 *   Author: Lv Zheng <lv.zheng@intel.com>
 */

#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
d2912cb1	1	/* SPDX-License-Identifier: GPL-2.0-only */
07d83914 LZ	2	/*
	3	* IA64 specific ACPICA environments and implementation
	4	*
	5	* Copyright (C) 2014, Intel Corporation
	6	* Author: Lv Zheng <lv.zheng@intel.com>
07d83914 LZ	7	*/
	8
	9	#ifndef _ASM_IA64_ACENV_H
	10	#define _ASM_IA64_ACENV_H
	11
	12	#include <asm/intrinsics.h>
	13
	14	#define COMPILER_DEPENDENT_INT64 long
	15	#define COMPILER_DEPENDENT_UINT64 unsigned long
	16
07d83914 LZ	17	/* Asm macros */
07d83914 LZ	18
07d83914 LZ	19	static inline int
	20	ia64_acpi_acquire_global_lock(unsigned int *lock)
	21	{
	22	unsigned int old, new, val;
	23	do {
	24	old = *lock;
	25	new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
	26	val = ia64_cmpxchg4_acq(lock, new, old);
	27	} while (unlikely (val != old));
	28	return (new < 3) ? -1 : 0;
	29	}
	30
	31	static inline int
	32	ia64_acpi_release_global_lock(unsigned int *lock)
	33	{
	34	unsigned int old, new, val;
	35	do {
	36	old = *lock;
	37	new = old & ~0x3;
	38	val = ia64_cmpxchg4_acq(lock, new, old);
	39	} while (unlikely (val != old));
	40	return old & 0x1;
	41	}
	42
	43	#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
	44	((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock))
	45
	46	#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
	47	((Acq) = ia64_acpi_release_global_lock(&facs->global_lock))
	48
07d83914	49	#endif /* _ASM_IA64_ACENV_H */