1/*
2 * X86 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_X86_ACENV_H
13#define _ASM_X86_ACENV_H
14
15#include <asm/special_insns.h>
16
17/* Asm macros */
18
19#define ACPI_FLUSH_CPU_CACHE()	wbinvd()
20
21int __acpi_acquire_global_lock(unsigned int *lock);
22int __acpi_release_global_lock(unsigned int *lock);
23
24#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
25	((Acq) = __acpi_acquire_global_lock(&facs->global_lock))
26
27#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
28	((Acq) = __acpi_release_global_lock(&facs->global_lock))
29
30/*
31 * Math helper asm macros
32 */
33#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
34	asm("divl %2;"				     \
35	    : "=a"(q32), "=d"(r32)		     \
36	    : "r"(d32),				     \
37	     "0"(n_lo), "1"(n_hi))
38
39#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
40	asm("shrl   $1,%2	;"	\
41	    "rcrl   $1,%3;"		\
42	    : "=r"(n_hi), "=r"(n_lo)	\
43	    : "0"(n_hi), "1"(n_lo))
44
45#endif /* _ASM_X86_ACENV_H */
46