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      1 /* $NetBSD: smccc.h,v 1.2 2021/08/07 21:21:49 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2021 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _ARM_SMCCC_H
     30 #define _ARM_SMCCC_H
     31 
     32 /*
     33  * SMCCC return codes
     34  */
     35 #define	SMCCC_SUCCESS			0
     36 #define	SMCCC_NOT_SUPPORTED		-1
     37 #define	SMCCC_NOT_REQUIRED		-2
     38 #define	SMCCC_INVALID_PARAMETER		-3
     39 
     40 /*
     41  * Returns true if SMCCC is supported.
     42  */
     43 bool	smccc_probe(void);
     44 
     45 /*
     46  * Get SMCCC version.
     47  */
     48 int	smccc_version(void);
     49 
     50 /*
     51  * Call an SMC/HVC service.
     52  */
     53 int	smccc_call(uint32_t, register_t, register_t, register_t, register_t,
     54 		   register_t *, register_t *, register_t *, register_t *);
     55 
     56 #endif /* _ARM_SMCCC_H */
     57