1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * IA64 specific ACPICA environments and implementation
 4 *
 5 * Copyright (C) 2014, Intel Corporation
 6 *   Author: Lv Zheng <lv.zheng@intel.com>
 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
17/* Asm macros */
18
19static inline int
20ia64_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
31static inline int
32ia64_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
49#endif /* _ASM_IA64_ACENV_H */

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * IA64 specific ACPICA environments and implementation
 4 *
 5 * Copyright (C) 2014, Intel Corporation
 6 *   Author: Lv Zheng <lv.zheng@intel.com>
 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
17/* Asm macros */
18
19static inline int
20ia64_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
31static inline int
32ia64_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
49#endif /* _ASM_IA64_ACENV_H */