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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *
4 * Copyright (C) 2015 ARM Limited
5 */
6
7#ifndef __LINUX_PSCI_H
8#define __LINUX_PSCI_H
9
10#include <linux/arm-smccc.h>
11#include <linux/init.h>
12#include <linux/types.h>
13
14#define PSCI_POWER_STATE_TYPE_STANDBY 0
15#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
16
17bool psci_tos_resident_on(int cpu);
18
19int psci_cpu_suspend_enter(u32 state);
20bool psci_power_state_is_valid(u32 state);
21
22enum smccc_version {
23 SMCCC_VERSION_1_0,
24 SMCCC_VERSION_1_1,
25};
26
27struct psci_operations {
28 u32 (*get_version)(void);
29 int (*cpu_suspend)(u32 state, unsigned long entry_point);
30 int (*cpu_off)(u32 state);
31 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
32 int (*migrate)(unsigned long cpuid);
33 int (*affinity_info)(unsigned long target_affinity,
34 unsigned long lowest_affinity_level);
35 int (*migrate_info_type)(void);
36 enum arm_smccc_conduit conduit;
37 enum smccc_version smccc_version;
38};
39
40extern struct psci_operations psci_ops;
41
42#if defined(CONFIG_ARM_PSCI_FW)
43int __init psci_dt_init(void);
44#else
45static inline int psci_dt_init(void) { return 0; }
46#endif
47
48#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
49int __init psci_acpi_init(void);
50bool __init acpi_psci_present(void);
51bool acpi_psci_use_hvc(void);
52#else
53static inline int psci_acpi_init(void) { return 0; }
54static inline bool acpi_psci_present(void) { return false; }
55static inline bool acpi_psci_use_hvc(void) {return false; }
56#endif
57
58#endif /* __LINUX_PSCI_H */