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);
24 bool psci_power_state_loses_context(u32 state);
25 bool psci_power_state_is_valid(u32 state);
27 int psci_cpu_init_idle(unsigned int cpu);
28 int psci_cpu_suspend_enter(unsigned long index);
41 struct psci_operations {
42 u32 (*get_version)(void);
43 int (*cpu_suspend)(u32 state, unsigned long entry_point);
44 int (*cpu_off)(u32 state);
45 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
46 int (*migrate)(unsigned long cpuid);
47 int (*affinity_info)(unsigned long target_affinity,
48 unsigned long lowest_affinity_level);
49 int (*migrate_info_type)(void);
50 enum psci_conduit conduit;
51 enum smccc_version smccc_version;
54 extern struct psci_operations psci_ops;
56 #if defined(CONFIG_ARM_PSCI_FW)
57 int __init psci_dt_init(void);
59 static inline int psci_dt_init(void) { return 0; }
62 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
63 int __init psci_acpi_init(void);
64 bool __init acpi_psci_present(void);
65 bool __init acpi_psci_use_hvc(void);
67 static inline int psci_acpi_init(void) { return 0; }
68 static inline bool acpi_psci_present(void) { return false; }
71 #endif /* __LINUX_PSCI_H */