arch/x86/include/asm/acenv.h

   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
  18 int __acpi_acquire_global_lock(unsigned int *lock);
  19 int __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 */