include/linux/psci.h

   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
  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);
  26
  27 int psci_cpu_init_idle(unsigned int cpu);
  28 int psci_cpu_suspend_enter(unsigned long index);
  29
  30 struct psci_operations {
  31         int (*cpu_suspend)(u32 state, unsigned long entry_point);
  32         int (*cpu_off)(u32 state);
  33         int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
  34         int (*migrate)(unsigned long cpuid);
  35         int (*affinity_info)(unsigned long target_affinity,
  36                         unsigned long lowest_affinity_level);
  37         int (*migrate_info_type)(void);
  38 };
  39
  40 extern struct psci_operations psci_ops;
  41
  42 #if defined(CONFIG_ARM_PSCI_FW)
  43 int __init psci_dt_init(void);
  44 #else
  45 static inline int psci_dt_init(void) { return 0; }
  46 #endif
  47
  48 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  49 int __init psci_acpi_init(void);
  50 bool __init acpi_psci_present(void);
  51 bool __init acpi_psci_use_hvc(void);
  52 #else
  53 static inline int psci_acpi_init(void) { return 0; }
  54 static inline bool acpi_psci_present(void) { return false; }
  55 #endif
  56
  57 #endif /* __LINUX_PSCI_H */