FreeBSD/Linux Kernel Cross Reference
sys/contrib/libfdt/fdt_wip.c

     /*
      * libfdt - Flat Device Tree manipulation
      * Copyright (C) 2006 David Gibson, IBM Corporation.
      *
      * libfdt is dual licensed: you can use it either under the terms of
      * the GPL, or the BSD license, at your option.
      *
      *  a) This library is free software; you can redistribute it and/or
      *     modify it under the terms of the GNU General Public License as
     *     published by the Free Software Foundation; either version 2 of the
     *     License, or (at your option) any later version.
     *
     *     This library is distributed in the hope that it will be useful,
     *     but WITHOUT ANY WARRANTY; without even the implied warranty of
     *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     *     GNU General Public License for more details.
     *
     *     You should have received a copy of the GNU General Public
     *     License along with this library; if not, write to the Free
     *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
     *     MA 02110-1301 USA
     *
     * Alternatively,
     *
     *  b) 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
     */
    #include "libfdt_env.h"
    
    #include <fdt.h>
    #include <libfdt.h>
    
    #include "libfdt_internal.h"
    
    int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
                                            const char *name, int namelen,
                                            uint32_t idx, const void *val,
                                            int len)
    {
            void *propval;
            int proplen;
    
            propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen,
                                            &proplen);
            if (!propval)
                    return proplen;
    
            if (proplen < (len + idx))
                    return -FDT_ERR_NOSPACE;
    
            memcpy((char *)propval + idx, val, len);
            return 0;
    }
    
    int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
                            const void *val, int len)
    {
            const void *propval;
            int proplen;
    
            propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
            if (!propval)
                    return proplen;
    
            if (proplen != len)
                    return -FDT_ERR_NOSPACE;
    
            return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name,
                                                       strlen(name), 0,
                                                       val, len);
    }
    
    static void fdt_nop_region_(void *start, int len)
    {
            fdt32_t *p;
    
           for (p = start; (char *)p < ((char *)start + len); p++)
                   *p = cpu_to_fdt32(FDT_NOP);
   }
   
   int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
   {
           struct fdt_property *prop;
           int len;
   
           prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
           if (!prop)
                   return len;
   
           fdt_nop_region_(prop, len + sizeof(*prop));
   
           return 0;
   }
   
   int fdt_node_end_offset_(void *fdt, int offset)
   {
           int depth = 0;
   
           while ((offset >= 0) && (depth >= 0))
                   offset = fdt_next_node(fdt, offset, &depth);
   
           return offset;
   }
   
   int fdt_nop_node(void *fdt, int nodeoffset)
   {
           int endoffset;
   
           endoffset = fdt_node_end_offset_(fdt, nodeoffset);
           if (endoffset < 0)
                   return endoffset;
   
           fdt_nop_region_(fdt_offset_ptr_w(fdt, nodeoffset, 0),
                           endoffset - nodeoffset);
           return 0;
   }

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