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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * X86 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_X86_ACENV_H
10#define _ASM_X86_ACENV_H
11
12#include <asm/special_insns.h>
13
14/* Asm macros */
15
16#define ACPI_FLUSH_CPU_CACHE() wbinvd()
17
18int __acpi_acquire_global_lock(unsigned int *lock);
19int __acpi_release_global_lock(unsigned int *lock);
20
21#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
22 ((Acq) = __acpi_acquire_global_lock(&facs->global_lock))
23
24#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
25 ((Acq) = __acpi_release_global_lock(&facs->global_lock))
26
27/*
28 * Math helper asm macros
29 */
30#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
31 asm("divl %2;" \
32 : "=a"(q32), "=d"(r32) \
33 : "r"(d32), \
34 "0"(n_lo), "1"(n_hi))
35
36#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
37 asm("shrl $1,%2 ;" \
38 "rcrl $1,%3;" \
39 : "=r"(n_hi), "=r"(n_lo) \
40 : "0"(n_hi), "1"(n_lo))
41
42#endif /* _ASM_X86_ACENV_H */