xref: /openbmc/linux/include/linux/psci.h (revision 6df3e144)
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 
17 bool psci_tos_resident_on(int cpu);
18 
19 int psci_cpu_suspend_enter(u32 state);
20 bool psci_power_state_is_valid(u32 state);
21 int psci_set_osi_mode(bool enable);
22 bool psci_has_osi_support(void);
23 
24 struct psci_operations {
25 	u32 (*get_version)(void);
26 	int (*cpu_suspend)(u32 state, unsigned long entry_point);
27 	int (*cpu_off)(u32 state);
28 	int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
29 	int (*migrate)(unsigned long cpuid);
30 	int (*affinity_info)(unsigned long target_affinity,
31 			unsigned long lowest_affinity_level);
32 	int (*migrate_info_type)(void);
33 };
34 
35 extern struct psci_operations psci_ops;
36 
37 struct psci_0_1_function_ids {
38 	u32 cpu_suspend;
39 	u32 cpu_on;
40 	u32 cpu_off;
41 	u32 migrate;
42 };
43 
44 struct psci_0_1_function_ids get_psci_0_1_function_ids(void);
45 
46 #if defined(CONFIG_ARM_PSCI_FW)
47 int __init psci_dt_init(void);
48 #else
psci_dt_init(void)49 static inline int psci_dt_init(void) { return 0; }
50 #endif
51 
52 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
53 int __init psci_acpi_init(void);
54 bool __init acpi_psci_present(void);
55 bool acpi_psci_use_hvc(void);
56 #else
psci_acpi_init(void)57 static inline int psci_acpi_init(void) { return 0; }
acpi_psci_present(void)58 static inline bool acpi_psci_present(void) { return false; }
acpi_psci_use_hvc(void)59 static inline bool acpi_psci_use_hvc(void) {return false; }
60 #endif
61 
62 #endif /* __LINUX_PSCI_H */
63