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_CUSTOMIZED_INDEX           (1 << 7)
  21 #define PSCI_CLUSTER_SLEEP              (PSCI_CUSTOMIZED_INDEX)
  22 #define PSCI_SYSTEM_IDLE                (1 << 8)
  23 #define PSCI_CP_CALL                    (1 << 9)
  24 #define PSCI_SYSTEM_SLEEP               (1 << 10)
  25
  26 #define PSCI_POWER_STATE_TYPE_STANDBY           0
  27 #define PSCI_POWER_STATE_TYPE_POWER_DOWN        1
  28
  29 bool psci_tos_resident_on(int cpu);
  30
  31 int psci_cpu_init_idle(unsigned int cpu);
  32 int psci_cpu_suspend_enter(unsigned long index);
  33
  34 enum psci_conduit {
  35         PSCI_CONDUIT_NONE,
  36         PSCI_CONDUIT_SMC,
  37         PSCI_CONDUIT_HVC,
  38 };
  39
  40 enum smccc_version {
  41         SMCCC_VERSION_1_0,
  42         SMCCC_VERSION_1_1,
  43 };
  44
  45 struct psci_operations {
  46         u32 (*get_version)(void);
  47         int (*cpu_suspend)(u32 state, unsigned long entry_point);
  48         int (*cpu_off)(u32 state);
  49         int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
  50         int (*migrate)(unsigned long cpuid);
  51         int (*affinity_info)(unsigned long target_affinity,
  52                         unsigned long lowest_affinity_level);
  53         int (*migrate_info_type)(void);
  54         enum psci_conduit conduit;
  55         enum smccc_version smccc_version;
  56 };
  57
  58 extern struct psci_operations psci_ops;
  59
  60 #if defined(CONFIG_ARM_PSCI_FW)
  61 int __init psci_dt_init(void);
  62 #else
  63 static inline int psci_dt_init(void) { return 0; }
  64 #endif
  65
  66 #if defined(CONFIG_ARM_PSCI_FW) && defined(CONFIG_ACPI)
  67 int __init psci_acpi_init(void);
  68 bool __init acpi_psci_present(void);
  69 bool __init acpi_psci_use_hvc(void);
  70 #else
  71 static inline int psci_acpi_init(void) { return 0; }
  72 static inline bool acpi_psci_present(void) { return false; }
  73 #endif
  74
  75 #endif /* __LINUX_PSCI_H */