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 
9 struct 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  */
18 struct 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  */
29 void *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  */
39 void enter_acpi_mode(int pm1_cnt);
40 
41 #endif /* __ASM_ACPI_H__ */
42