FreeBSD/Linux Kernel Cross Reference
sys/dev/psci/psci.h

     /*-
      * Copyright (c) 2013, 2014 Robin Randhawa
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_PSCI_H_
    #define _MACHINE_PSCI_H_
    
    #include <sys/types.h>
    #include <dev/psci/smccc.h>
    
    typedef int (*psci_initfn_t)(device_t dev, int default_version);
    typedef int (*psci_callfn_t)(register_t, register_t, register_t, register_t,
            register_t, register_t, register_t, register_t,
            struct arm_smccc_res *res);
    
    extern bool psci_present;
    
    int     psci_cpu_on(unsigned long, unsigned long, unsigned long);
    void    psci_reset(void);
    int32_t psci_features(uint32_t);
    int     psci_get_version(void);
    
    /* Handler to let us call into the PSCI/SMCCC firmware */
    extern psci_callfn_t psci_callfn;
    static inline int
    psci_call(register_t a, register_t b, register_t c, register_t d)
    {
    
            return (psci_callfn(a, b, c, d, 0, 0, 0, 0, NULL));
    }
    
    /*
     * PSCI return codes.
     */
    #define PSCI_RETVAL_SUCCESS             0
    #define PSCI_RETVAL_NOT_SUPPORTED       -1
    #define PSCI_RETVAL_INVALID_PARAMS      -2
    #define PSCI_RETVAL_DENIED              -3
    #define PSCI_RETVAL_ALREADY_ON          -4
    #define PSCI_RETVAL_ON_PENDING          -5
    #define PSCI_RETVAL_INTERNAL_FAILURE    -6
    #define PSCI_RETVAL_NOT_PRESENT         -7
    #define PSCI_RETVAL_DISABLED            -8
    /*
     * Used to signal PSCI is not available, e.g. to start a CPU.
     */
    #define PSCI_MISSING                    1
    
    /*
     * PSCI function codes (as per PSCI v0.2).
     */
    #ifdef __aarch64__
    #define PSCI_FNID_VERSION               0x84000000
    #define PSCI_FNID_CPU_SUSPEND           0xc4000001
    #define PSCI_FNID_CPU_OFF               0x84000002
    #define PSCI_FNID_CPU_ON                0xc4000003
    #define PSCI_FNID_AFFINITY_INFO         0xc4000004
    #define PSCI_FNID_MIGRATE               0xc4000005
    #define PSCI_FNID_MIGRATE_INFO_TYPE     0x84000006
    #define PSCI_FNID_MIGRATE_INFO_UP_CPU   0xc4000007
    #define PSCI_FNID_SYSTEM_OFF            0x84000008
    #define PSCI_FNID_SYSTEM_RESET          0x84000009
    #define PSCI_FNID_FEATURES              0x8400000a
    #else
    #define PSCI_FNID_VERSION               0x84000000
    #define PSCI_FNID_CPU_SUSPEND           0x84000001
    #define PSCI_FNID_CPU_OFF               0x84000002
    #define PSCI_FNID_CPU_ON                0x84000003
    #define PSCI_FNID_AFFINITY_INFO         0x84000004
    #define PSCI_FNID_MIGRATE               0x84000005
    #define PSCI_FNID_MIGRATE_INFO_TYPE     0x84000006
    #define PSCI_FNID_MIGRATE_INFO_UP_CPU   0x84000007
    #define PSCI_FNID_SYSTEM_OFF            0x84000008
    #define PSCI_FNID_SYSTEM_RESET          0x84000009
    #define PSCI_FNID_FEATURES              0x8400000a
   #endif
   
   #define PSCI_VER_MAJOR(v)               (((v) >> 16) & 0xFF)
   #define PSCI_VER_MINOR(v)               ((v) & 0xFF)
   
   enum psci_fn {
           PSCI_FN_VERSION,
           PSCI_FN_CPU_SUSPEND,
           PSCI_FN_CPU_OFF,
           PSCI_FN_CPU_ON,
           PSCI_FN_AFFINITY_INFO,
           PSCI_FN_MIGRATE,
           PSCI_FN_MIGRATE_INFO_TYPE,
           PSCI_FN_MIGRATE_INFO_UP_CPU,
           PSCI_FN_SYSTEM_OFF,
           PSCI_FN_SYSTEM_RESET,
           PSCI_FN_MAX
   };
   
   #endif /* _MACHINE_PSCI_H_ */

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