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.
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.
11 * Copyright (C) 2015 ARM Limited
14 #ifndef __LINUX_PSCI_H
15 #define __LINUX_PSCI_H
17 #include <linux/init.h>
18 #include <linux/types.h>
20 #define PSCI_POWER_STATE_TYPE_STANDBY 0
21 #define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
23 bool psci_tos_resident_on(int cpu);
25 int psci_cpu_init_idle(unsigned int cpu);
26 int psci_cpu_suspend_enter(unsigned long index);
28 struct psci_operations {
29 u32 (*get_version)(void);
30 int (*cpu_suspend)(u32 state, unsigned long entry_point);
31 int (*cpu_off)(u32 state);
32 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
33 int (*migrate)(unsigned long cpuid);
34 int (*affinity_info)(unsigned long target_affinity,
35 unsigned long lowest_affinity_level);
36 int (*migrate_info_type)(void);
39 extern struct psci_operations psci_ops;
41 #if defined(CONFIG_ARM_PSCI_FW)
42 int __init psci_dt_init(void);
44 static inline int psci_dt_init(void) { return 0; }
47 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
48 int __init psci_acpi_init(void);
49 bool __init acpi_psci_present(void);
50 bool acpi_psci_use_hvc(void);
52 static inline int psci_acpi_init(void) { return 0; }
53 static inline bool acpi_psci_present(void) { return false; }
54 static inline bool acpi_psci_use_hvc(void) {return false; }
57 #endif /* __LINUX_PSCI_H */