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git.ipfire.org Git - people/ms/u-boot.git/blob - lib/libfdt/fdt_wip.c
2 * libfdt - Flat Device Tree manipulation
3 * Copyright (C) 2006 David Gibson, IBM Corporation.
4 * SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause
6 #include <libfdt_env.h>
15 #include "libfdt_internal.h"
17 int fdt_setprop_inplace(void *fdt
, int nodeoffset
, const char *name
,
18 const void *val
, int len
)
23 propval
= fdt_getprop_w(fdt
, nodeoffset
, name
, &proplen
);
28 return -FDT_ERR_NOSPACE
;
30 memcpy(propval
, val
, len
);
34 static void _fdt_nop_region(void *start
, int len
)
38 for (p
= start
; (char *)p
< ((char *)start
+ len
); p
++)
39 *p
= cpu_to_fdt32(FDT_NOP
);
42 int fdt_nop_property(void *fdt
, int nodeoffset
, const char *name
)
44 struct fdt_property
*prop
;
47 prop
= fdt_get_property_w(fdt
, nodeoffset
, name
, &len
);
51 _fdt_nop_region(prop
, len
+ sizeof(*prop
));
56 int _fdt_node_end_offset(void *fdt
, int offset
)
60 while ((offset
>= 0) && (depth
>= 0))
61 offset
= fdt_next_node(fdt
, offset
, &depth
);
66 int fdt_nop_node(void *fdt
, int nodeoffset
)
70 endoffset
= _fdt_node_end_offset(fdt
, nodeoffset
);
74 _fdt_nop_region(fdt_offset_ptr_w(fdt
, nodeoffset
, 0),
75 endoffset
- nodeoffset
);
79 #define FDT_MAX_DEPTH 32
81 static int str_in_list(const char *str
, char * const list
[], int count
)
85 for (i
= 0; i
< count
; i
++)
86 if (!strcmp(list
[i
], str
))
92 int fdt_find_regions(const void *fdt
, char * const inc
[], int inc_count
,
93 char * const exc_prop
[], int exc_prop_count
,
94 struct fdt_region region
[], int max_regions
,
95 char *path
, int path_len
, int add_string_tab
)
97 int stack
[FDT_MAX_DEPTH
];
105 int base
= fdt_off_dt_struct(fdt
);
110 const struct fdt_property
*prop
;
119 tag
= fdt_next_tag(fdt
, offset
, &nextoffset
);
120 stop_at
= nextoffset
;
126 prop
= fdt_get_property_by_offset(fdt
, offset
, NULL
);
127 str
= fdt_string(fdt
, fdt32_to_cpu(prop
->nameoff
));
128 if (str_in_list(str
, exc_prop
, exc_prop_count
))
139 if (depth
== FDT_MAX_DEPTH
)
140 return -FDT_ERR_BADSTRUCTURE
;
141 name
= fdt_get_name(fdt
, offset
, &len
);
142 if (end
- path
+ 2 + len
>= path_len
)
143 return -FDT_ERR_NOSPACE
;
151 if (str_in_list(path
, inc
, inc_count
))
162 want
= stack
[depth
--];
163 while (end
> path
&& *--end
!= '/')
173 if (include
&& start
== -1) {
174 /* Should we merge with previous? */
175 if (count
&& count
<= max_regions
&&
176 offset
== region
[count
- 1].offset
+
177 region
[count
- 1].size
- base
)
178 start
= region
[--count
].offset
- base
;
183 if (!include
&& start
!= -1) {
184 if (count
< max_regions
) {
185 region
[count
].offset
= base
+ start
;
186 region
[count
].size
= stop_at
- start
;
191 } while (tag
!= FDT_END
);
193 if (nextoffset
!= fdt_size_dt_struct(fdt
))
194 return -FDT_ERR_BADLAYOUT
;
196 /* Add a region for the END tag and the string table */
197 if (count
< max_regions
) {
198 region
[count
].offset
= base
+ start
;
199 region
[count
].size
= nextoffset
- start
;
201 region
[count
].size
+= fdt_size_dt_strings(fdt
);