baseport/src/cedar/generic/base/syborg/svpplatform/libfdt/fdt_wip.c
changeset 2 d55eb581a87c
parent 1 2fb8b9db1c86
child 3 c2946f91d81f
equal deleted inserted replaced
1:2fb8b9db1c86 2:d55eb581a87c
     1 /*
       
     2  * libfdt - Flat Device Tree manipulation
       
     3  * Copyright (C) 2006 David Gibson, IBM Corporation.
       
     4  *
       
     5  * libfdt is dual licensed: you can use it either under the terms of
       
     6  * the GPL, or the BSD license, at your option.
       
     7  *
       
     8  *  a) This library is free software; you can redistribute it and/or
       
     9  *     modify it under the terms of the GNU General Public License as
       
    10  *     published by the Free Software Foundation; either version 2 of the
       
    11  *     License, or (at your option) any later version.
       
    12  *
       
    13  *     This library is distributed in the hope that it will be useful,
       
    14  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
       
    15  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
       
    16  *     GNU General Public License for more details.
       
    17  *
       
    18  *     You should have received a copy of the GNU General Public
       
    19  *     License along with this library; if not, write to the Free
       
    20  *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
       
    21  *     MA 02110-1301 USA
       
    22  *
       
    23  * Alternatively,
       
    24  *
       
    25  *  b) Redistribution and use in source and binary forms, with or
       
    26  *     without modification, are permitted provided that the following
       
    27  *     conditions are met:
       
    28  *
       
    29  *     1. Redistributions of source code must retain the above
       
    30  *        copyright notice, this list of conditions and the following
       
    31  *        disclaimer.
       
    32  *     2. Redistributions in binary form must reproduce the above
       
    33  *        copyright notice, this list of conditions and the following
       
    34  *        disclaimer in the documentation and/or other materials
       
    35  *        provided with the distribution.
       
    36  *
       
    37  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
       
    38  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
       
    39  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
       
    40  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
       
    41  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
       
    42  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
       
    43  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
       
    44  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
       
    45  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
       
    46  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
       
    47  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
       
    48  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
       
    49  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
       
    50  */
       
    51 #include "libfdt_env.h"
       
    52 
       
    53 #include <fdt.h>
       
    54 #include <libfdt.h>
       
    55 
       
    56 #include "libfdt_internal.h"
       
    57 
       
    58 int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
       
    59 			const void *val, int len)
       
    60 {
       
    61 	void *propval;
       
    62 	int proplen;
       
    63 
       
    64 	propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen);
       
    65 	if (! propval)
       
    66 		return proplen;
       
    67 
       
    68 	if (proplen != len)
       
    69 		return -FDT_ERR_NOSPACE;
       
    70 
       
    71 	memcpy(propval, val, len);
       
    72 	return 0;
       
    73 }
       
    74 
       
    75 static void nop_region(void *start, int len)
       
    76 {
       
    77 	uint32_t *p;
       
    78 
       
    79 	for (p = start; (void *)p < (start + len); p++)
       
    80 		*p = cpu_to_fdt32(FDT_NOP);
       
    81 }
       
    82 
       
    83 int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
       
    84 {
       
    85 	struct fdt_property *prop;
       
    86 	int len;
       
    87 
       
    88 	prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
       
    89 	if (! prop)
       
    90 		return len;
       
    91 
       
    92 	nop_region(prop, len + sizeof(*prop));
       
    93 
       
    94 	return 0;
       
    95 }
       
    96 
       
    97 int _fdt_node_end_offset(void *fdt, int nodeoffset)
       
    98 {
       
    99 	int level = 0;
       
   100 	uint32_t tag;
       
   101 	int offset, nextoffset;
       
   102 
       
   103 	tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
       
   104 	if (tag != FDT_BEGIN_NODE)
       
   105 		return -FDT_ERR_BADOFFSET;
       
   106 	do {
       
   107 		offset = nextoffset;
       
   108 		tag = fdt_next_tag(fdt, offset, &nextoffset);
       
   109 
       
   110 		switch (tag) {
       
   111 		case FDT_END:
       
   112 			return offset;
       
   113 
       
   114 		case FDT_BEGIN_NODE:
       
   115 			level++;
       
   116 			break;
       
   117 
       
   118 		case FDT_END_NODE:
       
   119 			level--;
       
   120 			break;
       
   121 
       
   122 		case FDT_PROP:
       
   123 		case FDT_NOP:
       
   124 			break;
       
   125 
       
   126 		default:
       
   127 			return -FDT_ERR_BADSTRUCTURE;
       
   128 		}
       
   129 	} while (level >= 0);
       
   130 
       
   131 	return nextoffset;
       
   132 }
       
   133 
       
   134 int fdt_nop_node(void *fdt, int nodeoffset)
       
   135 {
       
   136 	int endoffset;
       
   137 
       
   138 	endoffset = _fdt_node_end_offset(fdt, nodeoffset);
       
   139 	if (endoffset < 0)
       
   140 		return endoffset;
       
   141 
       
   142 	nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0), endoffset - nodeoffset);
       
   143 	return 0;
       
   144 }