1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9 * GNU General Public License for more details.
10 *
11 * Copyright (C) 2015 ARM Limited
12 */
13
14#ifndef __LINUX_PSCI_H
15#define __LINUX_PSCI_H
16
17#include <linux/init.h>
18#include <linux/types.h>
19
20#define PSCI_POWER_STATE_TYPE_STANDBY		0
21#define PSCI_POWER_STATE_TYPE_POWER_DOWN	1
22
23bool psci_tos_resident_on(int cpu);
24bool psci_power_state_loses_context(u32 state);
25bool psci_power_state_is_valid(u32 state);
26
27struct psci_operations {
28	int (*cpu_suspend)(u32 state, unsigned long entry_point);
29	int (*cpu_off)(u32 state);
30	int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
31	int (*migrate)(unsigned long cpuid);
32	int (*affinity_info)(unsigned long target_affinity,
33			unsigned long lowest_affinity_level);
34	int (*migrate_info_type)(void);
35};
36
37extern struct psci_operations psci_ops;
38
39#if defined(CONFIG_ARM_PSCI_FW)
40int __init psci_dt_init(void);
41#else
42static inline int psci_dt_init(void) { return 0; }
43#endif
44
45#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
46int __init psci_acpi_init(void);
47bool __init acpi_psci_present(void);
48bool __init acpi_psci_use_hvc(void);
49#else
50static inline int psci_acpi_init(void) { return 0; }
51static inline bool acpi_psci_present(void) { return false; }
52#endif
53
54#endif /* __LINUX_PSCI_H */
55