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  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.  
  21. int __acpi_acquire_global_lock(unsigned int *lock);
  22. int __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.