arch/arm/include/asm/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) 2012 ARM Limited
  12  */
  13
  14 #ifndef __ASM_ARM_PSCI_H
  15 #define __ASM_ARM_PSCI_H
  16
  17 #define PSCI_POWER_STATE_TYPE_STANDBY           0
  18 #define PSCI_POWER_STATE_TYPE_POWER_DOWN        1
  19
  20 struct psci_power_state {
  21         u16     id;
  22         u8      type;
  23         u8      affinity_level;
  24 };
  25
  26 struct psci_operations {
  27         int (*cpu_suspend)(struct psci_power_state state,
  28                            unsigned long entry_point);
  29         int (*cpu_off)(struct psci_power_state state);
  30         int (*cpu_on)(unsigned long cpuid, unsigned long entry_point);
  31         int (*migrate)(unsigned long cpuid);
  32         int (*affinity_info)(unsigned long target_affinity,
  33                         unsigned long lowest_affinity_level);
  34         int (*migrate_info_type)(void);
  35 };
  36
  37 extern struct psci_operations psci_ops;
  38 extern struct smp_operations psci_smp_ops;
  39
  40 #if defined(CONFIG_SMP) && defined(CONFIG_ARM_PSCI)
  41 int psci_init(void);
  42 bool psci_smp_available(void);
  43 #else
  44 static inline int psci_init(void) { return 0; }
  45 static inline bool psci_smp_available(void) { return false; }
  46 #endif
  47
  48 #endif /* __ASM_ARM_PSCI_H */