libfdt/libfdt_internal.h

   1 #ifndef _LIBFDT_INTERNAL_H
   2 #define _LIBFDT_INTERNAL_H
   3 /*
   4  * libfdt - Flat Device Tree manipulation
   5  * Copyright (C) 2006 David Gibson, IBM Corporation.
   6  *
   7  * libfdt is dual licensed: you can use it either under the terms of
   8  * the GPL, or the BSD license, at your option.
   9  *
  10  *  a) This library is free software; you can redistribute it and/or
  11  *     modify it under the terms of the GNU General Public License as
  12  *     published by the Free Software Foundation; either version 2 of the
  13  *     License, or (at your option) any later version.
  14  *
  15  *     This library is distributed in the hope that it will be useful,
  16  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *     GNU General Public License for more details.
  19  *
  20  *     You should have received a copy of the GNU General Public
  21  *     License along with this library; if not, write to the Free
  22  *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  23  *     MA 02110-1301 USA
  24  *
  25  * Alternatively,
  26  *
  27  *  b) Redistribution and use in source and binary forms, with or
  28  *     without modification, are permitted provided that the following
  29  *     conditions are met:
  30  *
  31  *     1. Redistributions of source code must retain the above
  32  *        copyright notice, this list of conditions and the following
  33  *        disclaimer.
  34  *     2. Redistributions in binary form must reproduce the above
  35  *        copyright notice, this list of conditions and the following
  36  *        disclaimer in the documentation and/or other materials
  37  *        provided with the distribution.
  38  *
  39  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  40  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  41  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  42  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  43  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  44  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  49  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  50  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  51  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  52  */
  53 #include <fdt.h>
  54
  55 #define ALIGN(x, a)     (((x) + (a) - 1) & ~((a) - 1))
  56 #define PALIGN(p, a)    ((void *)ALIGN((unsigned long)(p), (a)))
  57
  58 #define memeq(p, q, n)  (memcmp((p), (q), (n)) == 0)
  59 #define streq(p, q)     (strcmp((p), (q)) == 0)
  60
  61 #define CHECK_HEADER(fdt) \
  62         { \
  63                 int err; \
  64                 if ((err = fdt_check_header(fdt)) != 0) \
  65                         return err; \
  66         }
  67
  68 uint32_t _fdt_next_tag(const void *fdt, int startoffset, int *nextoffset);
  69 const char *_fdt_find_string(const char *strtab, int tabsize, const char *s);
  70 int _fdt_node_end_offset(void *fdt, int nodeoffset);
  71
  72 static inline const void *_fdt_offset_ptr(const void *fdt, int offset)
  73 {
  74         return fdt + fdt_off_dt_struct(fdt) + offset;
  75 }
  76
  77 static inline void *_fdt_offset_ptr_w(void *fdt, int offset)
  78 {
  79         return (void *)_fdt_offset_ptr(fdt, offset);
  80 }
  81
  82 static inline const struct fdt_reserve_entry *_fdt_mem_rsv(const void *fdt, int n)
  83 {
  84         const struct fdt_reserve_entry *rsv_table =
  85                 fdt + fdt_off_mem_rsvmap(fdt);
  86
  87         return rsv_table + n;
  88 }
  89 static inline struct fdt_reserve_entry *_fdt_mem_rsv_w(void *fdt, int n)
  90 {
  91         return (void *)_fdt_mem_rsv(fdt, n);
  92 }
  93
  94 #define SW_MAGIC                (~FDT_MAGIC)
  95
  96 #endif /* _LIBFDT_INTERNAL_H */