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      1 /* $NetBSD: pci_smccc.h,v 1.1 2021/08/07 21:23:37 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 _PCI_SMCCC_H
     30 #define _PCI_SMCCC_H
     31 
     32 #define	PCI_SMCCC_SUCCESS(_r)	(((_r) & 0x80000000) == 0)
     33 
     34 #define	PCI_SMCCC_SBDF(s, b, d, f) \
     35 	(((unsigned)(s) << 16) | ((b) << 8) | ((d) << 3) | (f))
     36 
     37 #define	PCI_SMCCC_ACCESS_32BIT	4
     38 
     39 int	pci_smccc_version(void);
     40 int	pci_smccc_features(uint32_t);
     41 int	pci_smccc_read(uint32_t, uint32_t, uint32_t, uint32_t *);
     42 int	pci_smccc_write(uint32_t, uint32_t, uint32_t, uint32_t);
     43 int	pci_smccc_get_seg_info(uint16_t, uint8_t *, uint8_t *, uint16_t *);
     44 
     45 #endif /* !_PCI_SMCCC_H */
     46