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 #ifdef CONFIG_ACPI 22 23 int __acpi_acquire_global_lock(unsigned int *lock); 24 int __acpi_release_global_lock(unsigned int *lock); 25 26 #define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \ 27 ((Acq) = __acpi_acquire_global_lock(&facs->global_lock)) 28 29 #define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \ 30 ((Acq) = __acpi_release_global_lock(&facs->global_lock)) 31 32 /* 33 * Math helper asm macros 34 */ 35 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \ 36 asm("divl %2;" \ 37 : "=a"(q32), "=d"(r32) \ 38 : "r"(d32), \ 39 "0"(n_lo), "1"(n_hi)) 40 41 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \ 42 asm("shrl $1,%2 ;" \ 43 "rcrl $1,%3;" \ 44 : "=r"(n_hi), "=r"(n_lo) \ 45 : "0"(n_hi), "1"(n_lo)) 46 47 #endif 48 49 #endif /* _ASM_X86_ACENV_H */ 50