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libfdt_env.h revision 1.2.2.3 
      1 /*	$NetBSD: libfdt_env.h,v 1.2.2.3 2017/08/28 17:52:34 skrll Exp $	*/
      2 
      3 #ifndef _LIBFDT_ENV_H
      4 #define _LIBFDT_ENV_H
      5 /*
      6  * libfdt - Flat Device Tree manipulation
      7  * Copyright (C) 2006 David Gibson, IBM Corporation.
      8  * Copyright 2012 Kim Phillips, Freescale Semiconductor.
      9  *
     10  * libfdt is dual licensed: you can use it either under the terms of
     11  * the GPL, or the BSD license, at your option.
     12  *
     13  *  a) This library is free software; you can redistribute it and/or
     14  *     modify it under the terms of the GNU General Public License as
     15  *     published by the Free Software Foundation; either version 2 of the
     16  *     License, or (at your option) any later version.
     17  *
     18  *     This library is distributed in the hope that it will be useful,
     19  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
     20  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     21  *     GNU General Public License for more details.
     22  *
     23  *     You should have received a copy of the GNU General Public
     24  *     License along with this library; if not, write to the Free
     25  *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
     26  *     MA 02110-1301 USA
     27  *
     28  * Alternatively,
     29  *
     30  *  b) Redistribution and use in source and binary forms, with or
     31  *     without modification, are permitted provided that the following
     32  *     conditions are met:
     33  *
     34  *     1. Redistributions of source code must retain the above
     35  *        copyright notice, this list of conditions and the following
     36  *        disclaimer.
     37  *     2. Redistributions in binary form must reproduce the above
     38  *        copyright notice, this list of conditions and the following
     39  *        disclaimer in the documentation and/or other materials
     40  *        provided with the distribution.
     41  *
     42  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
     43  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
     44  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     45  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     46  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     47  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     48  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     49  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     50  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     51  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     52  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     53  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
     54  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     55  */
     56 
     57 #if defined(_KERNEL)
     58 #include <sys/param.h>
     59 #include <sys/types.h>
     60 #else
     61 #include <stddef.h>
     62 #include <stdint.h>
     63 #include <stdlib.h>
     64 #include <string.h>
     65 #endif
     66 
     67 #ifdef __CHECKER__
     68 #define FDT_FORCE __attribute__((force))
     69 #define FDT_BITWISE __attribute__((bitwise))
     70 #else
     71 #define FDT_FORCE
     72 #define FDT_BITWISE
     73 #endif
     74 
     75 typedef uint16_t FDT_BITWISE fdt16_t;
     76 typedef uint32_t FDT_BITWISE fdt32_t;
     77 typedef uint64_t FDT_BITWISE fdt64_t;
     78 
     79 #define EXTRACT_BYTE(x, n)	((unsigned long long)((uint8_t *)&x)[n])
     80 #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
     81 #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
     82 			 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
     83 #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
     84 			 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
     85 			 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
     86 			 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
     87 
     88 static inline uint16_t fdt16_to_cpu(fdt16_t x)
     89 {
     90 	return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
     91 }
     92 static inline fdt16_t cpu_to_fdt16(uint16_t x)
     93 {
     94 	return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
     95 }
     96 
     97 static inline uint32_t fdt32_to_cpu(fdt32_t x)
     98 {
     99 	return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
    100 }
    101 static inline fdt32_t cpu_to_fdt32(uint32_t x)
    102 {
    103 	return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
    104 }
    105 
    106 static inline uint64_t fdt64_to_cpu(fdt64_t x)
    107 {
    108 	return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
    109 }
    110 static inline fdt64_t cpu_to_fdt64(uint64_t x)
    111 {
    112 	return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
    113 }
    114 #undef CPU_TO_FDT64
    115 #undef CPU_TO_FDT32
    116 #undef CPU_TO_FDT16
    117 #undef EXTRACT_BYTE
    118 
    119 #endif /* _LIBFDT_ENV_H */
    120