1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
4 */
5
6#ifndef __ASM_ACPI_H__
7#define __ASM_ACPI_H__
8
9struct acpi_fadt;
10
11/**
12 * acpi_find_fadt() - find ACPI FADT table in the system memory
13 *
14 * This routine parses the ACPI table to locate the ACPI FADT table.
15 *
16 * @return:	a pointer to the ACPI FADT table in the system memory
17 */
18struct acpi_fadt *acpi_find_fadt(void);
19
20/**
21 * acpi_find_wakeup_vector() - find OS installed wake up vector address
22 *
23 * This routine parses the ACPI table to locate the wake up vector installed
24 * by the OS previously.
25 *
26 * @fadt:	a pointer to the ACPI FADT table in the system memory
27 * @return:	wake up vector address installed by the OS
28 */
29void *acpi_find_wakeup_vector(struct acpi_fadt *fadt);
30
31/**
32 * enter_acpi_mode() - enter into ACPI mode
33 *
34 * This programs the ACPI-defined PM1_CNT register to enable SCI interrupt
35 * so that the whole system swiches to ACPI mode.
36 *
37 * @pm1_cnt:	PM1_CNT register I/O address
38 */
39void enter_acpi_mode(int pm1_cnt);
40
41#endif /* __ASM_ACPI_H__ */
42