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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef DTC_H
3#define DTC_H
4
5/*
6 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
7 */
8
9#include <stdio.h>
10#include <string.h>
11#include <stdlib.h>
12#include <stdint.h>
13#include <stdbool.h>
14#include <stdarg.h>
15#include <assert.h>
16#include <ctype.h>
17#include <errno.h>
18#include <unistd.h>
19#include <inttypes.h>
20
21#include <libfdt_env.h>
22#include <fdt.h>
23
24#include "util.h"
25
26#ifdef DEBUG
27#define debug(...) printf(__VA_ARGS__)
28#else
29#define debug(...)
30#endif
31
32#define DEFAULT_FDT_VERSION 17
33
34/*
35 * Command line options
36 */
37extern int quiet; /* Level of quietness */
38extern unsigned int reservenum; /* Number of memory reservation slots */
39extern int minsize; /* Minimum blob size */
40extern int padsize; /* Additional padding to blob */
41extern int alignsize; /* Additional padding to blob accroding to the alignsize */
42extern int phandle_format; /* Use linux,phandle or phandle properties */
43extern int generate_symbols; /* generate symbols for nodes with labels */
44extern int generate_fixups; /* generate fixups */
45extern int auto_label_aliases; /* auto generate labels -> aliases */
46extern int annotate; /* annotate .dts with input source location */
47
48#define PHANDLE_LEGACY 0x1
49#define PHANDLE_EPAPR 0x2
50#define PHANDLE_BOTH 0x3
51
52typedef uint32_t cell_t;
53
54static inline bool phandle_is_valid(cell_t phandle)
55{
56 return phandle != 0 && phandle != ~0U;
57}
58
59static inline uint16_t dtb_ld16(const void *p)
60{
61 const uint8_t *bp = (const uint8_t *)p;
62
63 return ((uint16_t)bp[0] << 8)
64 | bp[1];
65}
66
67static inline uint32_t dtb_ld32(const void *p)
68{
69 const uint8_t *bp = (const uint8_t *)p;
70
71 return ((uint32_t)bp[0] << 24)
72 | ((uint32_t)bp[1] << 16)
73 | ((uint32_t)bp[2] << 8)
74 | bp[3];
75}
76
77static inline uint64_t dtb_ld64(const void *p)
78{
79 const uint8_t *bp = (const uint8_t *)p;
80
81 return ((uint64_t)bp[0] << 56)
82 | ((uint64_t)bp[1] << 48)
83 | ((uint64_t)bp[2] << 40)
84 | ((uint64_t)bp[3] << 32)
85 | ((uint64_t)bp[4] << 24)
86 | ((uint64_t)bp[5] << 16)
87 | ((uint64_t)bp[6] << 8)
88 | bp[7];
89}
90
91#define streq(a, b) (strcmp((a), (b)) == 0)
92#define strstarts(s, prefix) (strncmp((s), (prefix), strlen(prefix)) == 0)
93#define strprefixeq(a, n, b) (strlen(b) == (n) && (memcmp(a, b, n) == 0))
94static inline bool strends(const char *str, const char *suffix)
95{
96 unsigned int len, suffix_len;
97
98 len = strlen(str);
99 suffix_len = strlen(suffix);
100 if (len < suffix_len)
101 return false;
102 return streq(str + len - suffix_len, suffix);
103}
104
105#define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
106
107/* Data blobs */
108enum markertype {
109 TYPE_NONE,
110 REF_PHANDLE,
111 REF_PATH,
112 LABEL,
113 TYPE_UINT8,
114 TYPE_UINT16,
115 TYPE_UINT32,
116 TYPE_UINT64,
117 TYPE_STRING,
118};
119
120static inline bool is_type_marker(enum markertype type)
121{
122 return type >= TYPE_UINT8;
123}
124
125extern const char *markername(enum markertype markertype);
126
127struct marker {
128 enum markertype type;
129 unsigned int offset;
130 char *ref;
131 struct marker *next;
132};
133
134struct data {
135 unsigned int len;
136 char *val;
137 struct marker *markers;
138};
139
140
141#define empty_data ((struct data){ 0 /* all .members = 0 or NULL */ })
142
143#define for_each_marker(m) \
144 for (; (m); (m) = (m)->next)
145#define for_each_marker_of_type(m, t) \
146 for_each_marker(m) \
147 if ((m)->type == (t))
148
149static inline struct marker *next_type_marker(struct marker *m)
150{
151 for_each_marker(m)
152 if (is_type_marker(m->type))
153 break;
154 return m;
155}
156
157static inline size_t type_marker_length(struct marker *m)
158{
159 struct marker *next = next_type_marker(m->next);
160
161 if (next)
162 return next->offset - m->offset;
163 return 0;
164}
165
166void data_free(struct data d);
167
168struct data data_grow_for(struct data d, unsigned int xlen);
169
170struct data data_copy_mem(const char *mem, int len);
171struct data data_copy_escape_string(const char *s, int len);
172struct data data_copy_file(FILE *f, size_t len);
173
174struct data data_append_data(struct data d, const void *p, int len);
175struct data data_insert_at_marker(struct data d, struct marker *m,
176 const void *p, int len);
177struct data data_merge(struct data d1, struct data d2);
178struct data data_append_cell(struct data d, cell_t word);
179struct data data_append_integer(struct data d, uint64_t word, int bits);
180struct data data_append_re(struct data d, uint64_t address, uint64_t size);
181struct data data_append_addr(struct data d, uint64_t addr);
182struct data data_append_byte(struct data d, uint8_t byte);
183struct data data_append_zeroes(struct data d, int len);
184struct data data_append_align(struct data d, int align);
185
186struct data data_add_marker(struct data d, enum markertype type, char *ref);
187
188bool data_is_one_string(struct data d);
189
190/* DT constraints */
191
192#define MAX_PROPNAME_LEN 31
193#define MAX_NODENAME_LEN 31
194
195/* Live trees */
196struct label {
197 bool deleted;
198 char *label;
199 struct label *next;
200};
201
202struct bus_type {
203 const char *name;
204};
205
206struct property {
207 bool deleted;
208 char *name;
209 struct data val;
210
211 struct property *next;
212
213 struct label *labels;
214 struct srcpos *srcpos;
215};
216
217struct node {
218 bool deleted;
219 char *name;
220 struct property *proplist;
221 struct node *children;
222
223 struct node *parent;
224 struct node *next_sibling;
225
226 char *fullpath;
227 int basenamelen;
228
229 cell_t phandle;
230 int addr_cells, size_cells;
231
232 struct label *labels;
233 const struct bus_type *bus;
234 struct srcpos *srcpos;
235
236 bool omit_if_unused, is_referenced;
237};
238
239#define for_each_label_withdel(l0, l) \
240 for ((l) = (l0); (l); (l) = (l)->next)
241
242#define for_each_label(l0, l) \
243 for_each_label_withdel(l0, l) \
244 if (!(l)->deleted)
245
246#define for_each_property_withdel(n, p) \
247 for ((p) = (n)->proplist; (p); (p) = (p)->next)
248
249#define for_each_property(n, p) \
250 for_each_property_withdel(n, p) \
251 if (!(p)->deleted)
252
253#define for_each_child_withdel(n, c) \
254 for ((c) = (n)->children; (c); (c) = (c)->next_sibling)
255
256#define for_each_child(n, c) \
257 for_each_child_withdel(n, c) \
258 if (!(c)->deleted)
259
260void add_label(struct label **labels, char *label);
261void delete_labels(struct label **labels);
262
263struct property *build_property(char *name, struct data val,
264 struct srcpos *srcpos);
265struct property *build_property_delete(char *name);
266struct property *chain_property(struct property *first, struct property *list);
267struct property *reverse_properties(struct property *first);
268
269struct node *build_node(struct property *proplist, struct node *children,
270 struct srcpos *srcpos);
271struct node *build_node_delete(struct srcpos *srcpos);
272struct node *name_node(struct node *node, char *name);
273struct node *omit_node_if_unused(struct node *node);
274struct node *reference_node(struct node *node);
275struct node *chain_node(struct node *first, struct node *list);
276struct node *merge_nodes(struct node *old_node, struct node *new_node);
277struct node *add_orphan_node(struct node *old_node, struct node *new_node, char *ref);
278
279void add_property(struct node *node, struct property *prop);
280void delete_property_by_name(struct node *node, char *name);
281void delete_property(struct property *prop);
282void add_child(struct node *parent, struct node *child);
283void delete_node_by_name(struct node *parent, char *name);
284void delete_node(struct node *node);
285void append_to_property(struct node *node,
286 char *name, const void *data, int len,
287 enum markertype type);
288
289const char *get_unitname(struct node *node);
290struct property *get_property(struct node *node, const char *propname);
291cell_t propval_cell(struct property *prop);
292cell_t propval_cell_n(struct property *prop, unsigned int n);
293struct property *get_property_by_label(struct node *tree, const char *label,
294 struct node **node);
295struct marker *get_marker_label(struct node *tree, const char *label,
296 struct node **node, struct property **prop);
297struct node *get_subnode(struct node *node, const char *nodename);
298struct node *get_node_by_path(struct node *tree, const char *path);
299struct node *get_node_by_label(struct node *tree, const char *label);
300struct node *get_node_by_phandle(struct node *tree, cell_t phandle);
301struct node *get_node_by_ref(struct node *tree, const char *ref);
302cell_t get_node_phandle(struct node *root, struct node *node);
303
304uint32_t guess_boot_cpuid(struct node *tree);
305
306/* Boot info (tree plus memreserve information */
307
308struct reserve_info {
309 uint64_t address, size;
310
311 struct reserve_info *next;
312
313 struct label *labels;
314};
315
316struct reserve_info *build_reserve_entry(uint64_t start, uint64_t len);
317struct reserve_info *chain_reserve_entry(struct reserve_info *first,
318 struct reserve_info *list);
319struct reserve_info *add_reserve_entry(struct reserve_info *list,
320 struct reserve_info *new);
321
322
323struct dt_info {
324 unsigned int dtsflags;
325 struct reserve_info *reservelist;
326 uint32_t boot_cpuid_phys;
327 struct node *dt; /* the device tree */
328 const char *outname; /* filename being written to, "-" for stdout */
329};
330
331/* DTS version flags definitions */
332#define DTSF_V1 0x0001 /* /dts-v1/ */
333#define DTSF_PLUGIN 0x0002 /* /plugin/ */
334
335struct dt_info *build_dt_info(unsigned int dtsflags,
336 struct reserve_info *reservelist,
337 struct node *tree, uint32_t boot_cpuid_phys);
338void sort_tree(struct dt_info *dti);
339void generate_label_tree(struct dt_info *dti, char *name, bool allocph);
340void generate_fixups_tree(struct dt_info *dti, char *name);
341void generate_local_fixups_tree(struct dt_info *dti, char *name);
342
343/* Checks */
344
345void parse_checks_option(bool warn, bool error, const char *arg);
346void process_checks(bool force, struct dt_info *dti);
347
348/* Flattened trees */
349
350void dt_to_blob(FILE *f, struct dt_info *dti, int version);
351void dt_to_asm(FILE *f, struct dt_info *dti, int version);
352
353struct dt_info *dt_from_blob(const char *fname);
354
355/* Tree source */
356
357void dt_to_source(FILE *f, struct dt_info *dti);
358struct dt_info *dt_from_source(const char *f);
359
360/* YAML source */
361
362void dt_to_yaml(FILE *f, struct dt_info *dti);
363
364/* FS trees */
365
366struct dt_info *dt_from_fs(const char *dirname);
367
368#endif /* DTC_H */
1#ifndef _DTC_H
2#define _DTC_H
3
4/*
5 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
6 *
7 *
8 * This program 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 program 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 GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 * USA
22 */
23
24#include <stdio.h>
25#include <string.h>
26#include <stdlib.h>
27#include <stdint.h>
28#include <stdbool.h>
29#include <stdarg.h>
30#include <assert.h>
31#include <ctype.h>
32#include <errno.h>
33#include <unistd.h>
34
35#include <libfdt_env.h>
36#include <fdt.h>
37
38#include "util.h"
39
40#ifdef DEBUG
41#define debug(...) printf(__VA_ARGS__)
42#else
43#define debug(...)
44#endif
45
46
47#define DEFAULT_FDT_VERSION 17
48
49/*
50 * Command line options
51 */
52extern int quiet; /* Level of quietness */
53extern int reservenum; /* Number of memory reservation slots */
54extern int minsize; /* Minimum blob size */
55extern int padsize; /* Additional padding to blob */
56extern int phandle_format; /* Use linux,phandle or phandle properties */
57
58#define PHANDLE_LEGACY 0x1
59#define PHANDLE_EPAPR 0x2
60#define PHANDLE_BOTH 0x3
61
62typedef uint32_t cell_t;
63
64
65#define streq(a, b) (strcmp((a), (b)) == 0)
66#define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
67
68#define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
69
70/* Data blobs */
71enum markertype {
72 REF_PHANDLE,
73 REF_PATH,
74 LABEL,
75};
76
77struct marker {
78 enum markertype type;
79 int offset;
80 char *ref;
81 struct marker *next;
82};
83
84struct data {
85 int len;
86 char *val;
87 struct marker *markers;
88};
89
90
91#define empty_data ((struct data){ 0 /* all .members = 0 or NULL */ })
92
93#define for_each_marker(m) \
94 for (; (m); (m) = (m)->next)
95#define for_each_marker_of_type(m, t) \
96 for_each_marker(m) \
97 if ((m)->type == (t))
98
99void data_free(struct data d);
100
101struct data data_grow_for(struct data d, int xlen);
102
103struct data data_copy_mem(const char *mem, int len);
104struct data data_copy_escape_string(const char *s, int len);
105struct data data_copy_file(FILE *f, size_t len);
106
107struct data data_append_data(struct data d, const void *p, int len);
108struct data data_insert_at_marker(struct data d, struct marker *m,
109 const void *p, int len);
110struct data data_merge(struct data d1, struct data d2);
111struct data data_append_cell(struct data d, cell_t word);
112struct data data_append_integer(struct data d, uint64_t word, int bits);
113struct data data_append_re(struct data d, const struct fdt_reserve_entry *re);
114struct data data_append_addr(struct data d, uint64_t addr);
115struct data data_append_byte(struct data d, uint8_t byte);
116struct data data_append_zeroes(struct data d, int len);
117struct data data_append_align(struct data d, int align);
118
119struct data data_add_marker(struct data d, enum markertype type, char *ref);
120
121bool data_is_one_string(struct data d);
122
123/* DT constraints */
124
125#define MAX_PROPNAME_LEN 31
126#define MAX_NODENAME_LEN 31
127
128/* Live trees */
129struct label {
130 bool deleted;
131 char *label;
132 struct label *next;
133};
134
135struct property {
136 bool deleted;
137 char *name;
138 struct data val;
139
140 struct property *next;
141
142 struct label *labels;
143};
144
145struct node {
146 bool deleted;
147 char *name;
148 struct property *proplist;
149 struct node *children;
150
151 struct node *parent;
152 struct node *next_sibling;
153
154 char *fullpath;
155 int basenamelen;
156
157 cell_t phandle;
158 int addr_cells, size_cells;
159
160 struct label *labels;
161};
162
163#define for_each_label_withdel(l0, l) \
164 for ((l) = (l0); (l); (l) = (l)->next)
165
166#define for_each_label(l0, l) \
167 for_each_label_withdel(l0, l) \
168 if (!(l)->deleted)
169
170#define for_each_property_withdel(n, p) \
171 for ((p) = (n)->proplist; (p); (p) = (p)->next)
172
173#define for_each_property(n, p) \
174 for_each_property_withdel(n, p) \
175 if (!(p)->deleted)
176
177#define for_each_child_withdel(n, c) \
178 for ((c) = (n)->children; (c); (c) = (c)->next_sibling)
179
180#define for_each_child(n, c) \
181 for_each_child_withdel(n, c) \
182 if (!(c)->deleted)
183
184void add_label(struct label **labels, char *label);
185void delete_labels(struct label **labels);
186
187struct property *build_property(char *name, struct data val);
188struct property *build_property_delete(char *name);
189struct property *chain_property(struct property *first, struct property *list);
190struct property *reverse_properties(struct property *first);
191
192struct node *build_node(struct property *proplist, struct node *children);
193struct node *build_node_delete(void);
194struct node *name_node(struct node *node, char *name);
195struct node *chain_node(struct node *first, struct node *list);
196struct node *merge_nodes(struct node *old_node, struct node *new_node);
197
198void add_property(struct node *node, struct property *prop);
199void delete_property_by_name(struct node *node, char *name);
200void delete_property(struct property *prop);
201void add_child(struct node *parent, struct node *child);
202void delete_node_by_name(struct node *parent, char *name);
203void delete_node(struct node *node);
204
205const char *get_unitname(struct node *node);
206struct property *get_property(struct node *node, const char *propname);
207cell_t propval_cell(struct property *prop);
208struct property *get_property_by_label(struct node *tree, const char *label,
209 struct node **node);
210struct marker *get_marker_label(struct node *tree, const char *label,
211 struct node **node, struct property **prop);
212struct node *get_subnode(struct node *node, const char *nodename);
213struct node *get_node_by_path(struct node *tree, const char *path);
214struct node *get_node_by_label(struct node *tree, const char *label);
215struct node *get_node_by_phandle(struct node *tree, cell_t phandle);
216struct node *get_node_by_ref(struct node *tree, const char *ref);
217cell_t get_node_phandle(struct node *root, struct node *node);
218
219uint32_t guess_boot_cpuid(struct node *tree);
220
221/* Boot info (tree plus memreserve information */
222
223struct reserve_info {
224 struct fdt_reserve_entry re;
225
226 struct reserve_info *next;
227
228 struct label *labels;
229};
230
231struct reserve_info *build_reserve_entry(uint64_t start, uint64_t len);
232struct reserve_info *chain_reserve_entry(struct reserve_info *first,
233 struct reserve_info *list);
234struct reserve_info *add_reserve_entry(struct reserve_info *list,
235 struct reserve_info *new);
236
237
238struct boot_info {
239 struct reserve_info *reservelist;
240 struct node *dt; /* the device tree */
241 uint32_t boot_cpuid_phys;
242};
243
244struct boot_info *build_boot_info(struct reserve_info *reservelist,
245 struct node *tree, uint32_t boot_cpuid_phys);
246void sort_tree(struct boot_info *bi);
247
248/* Checks */
249
250void parse_checks_option(bool warn, bool error, const char *arg);
251void process_checks(bool force, struct boot_info *bi);
252
253/* Flattened trees */
254
255void dt_to_blob(FILE *f, struct boot_info *bi, int version);
256void dt_to_asm(FILE *f, struct boot_info *bi, int version);
257
258struct boot_info *dt_from_blob(const char *fname);
259
260/* Tree source */
261
262void dt_to_source(FILE *f, struct boot_info *bi);
263struct boot_info *dt_from_source(const char *f);
264
265/* FS trees */
266
267struct boot_info *dt_from_fs(const char *dirname);
268
269#endif /* _DTC_H */