LXR linux/arch/x86/include/asm/acenv.h

   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