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);
24
25int psci_cpu_init_idle(unsigned int cpu);
26int psci_cpu_suspend_enter(unsigned long index);
27
28enum psci_conduit {
29 PSCI_CONDUIT_NONE,
30 PSCI_CONDUIT_SMC,
31 PSCI_CONDUIT_HVC,
32};
33
34enum smccc_version {
35 SMCCC_VERSION_1_0,
36 SMCCC_VERSION_1_1,
37};
38
39struct psci_operations {
40 u32 (*get_version)(void);
41 int (*cpu_suspend)(u32 state, unsigned long entry_point);
42 int (*cpu_off)(u32 state);
43 int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
44 int (*migrate)(unsigned long cpuid);
45 int (*affinity_info)(unsigned long target_affinity,
46 unsigned long lowest_affinity_level);
47 int (*migrate_info_type)(void);
48 enum psci_conduit conduit;
49 enum smccc_version smccc_version;
50};
51
52extern struct psci_operations psci_ops;
53
54#if defined(CONFIG_ARM_PSCI_FW)
55int __init psci_dt_init(void);
56#else
57static inline int psci_dt_init(void) { return 0; }
58#endif
59
60#if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
61int __init psci_acpi_init(void);
62bool __init acpi_psci_present(void);
63bool acpi_psci_use_hvc(void);
64#else
65static inline int psci_acpi_init(void) { return 0; }
66static inline bool acpi_psci_present(void) { return false; }
67static inline bool acpi_psci_use_hvc(void) {return false; }
68#endif
69
70#endif /* __LINUX_PSCI_H */
71