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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * X86 specific ACPICA environments and implementation
- *
- * Copyright (C) 2014, Intel Corporation
- * Author: Lv Zheng <[email protected]>
- */
- #ifndef _ASM_X86_ACENV_H
- #define _ASM_X86_ACENV_H
- #include <asm/special_insns.h>
- /* Asm macros */
- /*
- * ACPI_FLUSH_CPU_CACHE() flushes caches on entering sleep states.
- * It is required to prevent data loss.
- *
- * While running inside virtual machine, the kernel can bypass cache flushing.
- * Changing sleep state in a virtual machine doesn't affect the host system
- * sleep state and cannot lead to data loss.
- */
- #define ACPI_FLUSH_CPU_CACHE() \
- do { \
- if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) \
- wbinvd(); \
- } while (0)
- 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 /* _ASM_X86_ACENV_H */
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