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
  25 int psci_cpu_init_idle(unsigned int cpu);
  26 int psci_cpu_suspend_enter(unsigned long index);
  27
  28 enum psci_conduit {
  29         PSCI_CONDUIT_NONE,
  30         PSCI_CONDUIT_SMC,
  31         PSCI_CONDUIT_HVC,
  32 };
  33
  34 enum smccc_version {
  35         SMCCC_VERSION_1_0,
  36         SMCCC_VERSION_1_1,
  37 };
  38
  39 struct 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
  52 extern struct psci_operations psci_ops;
  53
  54 #if defined(CONFIG_ARM_PSCI_FW)
  55 int __init psci_dt_init(void);
  56 #else
  57 static inline int psci_dt_init(void) { return 0; }
  58 #endif
  59
  60 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  61 int __init psci_acpi_init(void);
  62 bool __init acpi_psci_present(void);
  63 bool acpi_psci_use_hvc(void);
  64 #else
  65 static inline int psci_acpi_init(void) { return 0; }
  66 static inline bool acpi_psci_present(void) { return false; }
  67 static inline bool acpi_psci_use_hvc(void) {return false; }
  68 #endif
  69
  70 #endif /* __LINUX_PSCI_H */