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/*
* X86 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_X86_ACENV_H
#define _ASM_X86_ACENV_H
#include <asm/special_insns.h>
/* Asm macros */
#define ACPI_FLUSH_CPU_CACHE() wbinvd()
#ifdef CONFIG_ACPI
int __acpi_acquire_global_lock(unsigned int *lock);
int __acpi_release_global_lock(unsigned int *lock);
#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
((Acq) = __acpi_acquire_global_lock(&facs->global_lock))
#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
((Acq) = __acpi_release_global_lock(&facs->global_lock))
/*
* Math helper asm macros
*/
#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
asm("divl %2;" \
: "=a"(q32), "=d"(r32) \
: "r"(d32), \
"0"(n_lo), "1"(n_hi))
#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
asm("shrl $1,%2 ;" \
"rcrl $1,%3;" \
: "=r"(n_hi), "=r"(n_lo) \
: "0"(n_hi), "1"(n_lo))
#endif
#endif /* _ASM_X86_ACENV_H */
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