root/include/linux/psci.h

INCLUDED FROM

DEFINITIONS

1. psci_dt_init
2. psci_acpi_init
3. acpi_psci_present
4. acpi_psci_use_hvc

   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/init.h>
  11 #include <linux/types.h>
  12 
  13 #define PSCI_POWER_STATE_TYPE_STANDBY           0
  14 #define PSCI_POWER_STATE_TYPE_POWER_DOWN        1
  15 
  16 bool psci_tos_resident_on(int cpu);
  17 
  18 int psci_cpu_suspend_enter(u32 state);
  19 bool psci_power_state_is_valid(u32 state);
  20 
  21 enum psci_conduit {
  22         PSCI_CONDUIT_NONE,
  23         PSCI_CONDUIT_SMC,
  24         PSCI_CONDUIT_HVC,
  25 };
  26 
  27 enum smccc_version {
  28         SMCCC_VERSION_1_0,
  29         SMCCC_VERSION_1_1,
  30 };
  31 
  32 struct psci_operations {
  33         u32 (*get_version)(void);
  34         int (*cpu_suspend)(u32 state, unsigned long entry_point);
  35         int (*cpu_off)(u32 state);
  36         int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
  37         int (*migrate)(unsigned long cpuid);
  38         int (*affinity_info)(unsigned long target_affinity,
  39                         unsigned long lowest_affinity_level);
  40         int (*migrate_info_type)(void);
  41         enum psci_conduit conduit;
  42         enum smccc_version smccc_version;
  43 };
  44 
  45 extern struct psci_operations psci_ops;
  46 
  47 #if defined(CONFIG_ARM_PSCI_FW)
  48 int __init psci_dt_init(void);
  49 #else
  50 static inline int psci_dt_init(void) { return 0; }
  51 #endif
  52 
  53 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  54 int __init psci_acpi_init(void);
  55 bool __init acpi_psci_present(void);
  56 bool acpi_psci_use_hvc(void);
  57 #else
  58 static inline int psci_acpi_init(void) { return 0; }
  59 static inline bool acpi_psci_present(void) { return false; }
  60 static inline bool acpi_psci_use_hvc(void) {return false; }
  61 #endif
  62 
  63 #endif /* __LINUX_PSCI_H */