1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5
6 #include "dtc.h"
7 #include "srcpos.h"
8
9 extern FILE *yyin;
10 extern int yyparse(void);
11 extern YYLTYPE yylloc;
12
13 struct dt_info *parser_output;
14 bool treesource_error;
15
dt_from_source(const char * fname)16 struct dt_info *dt_from_source(const char *fname)
17 {
18 parser_output = NULL;
19 treesource_error = false;
20
21 srcfile_push(fname);
22 yyin = current_srcfile->f;
23 yylloc.file = current_srcfile;
24
25 if (yyparse() != 0)
26 die("Unable to parse input tree\n");
27
28 if (treesource_error)
29 die("Syntax error parsing input tree\n");
30
31 return parser_output;
32 }
33
write_prefix(FILE * f,int level)34 static void write_prefix(FILE *f, int level)
35 {
36 int i;
37
38 for (i = 0; i < level; i++)
39 fputc('\t', f);
40 }
41
isstring(char c)42 static bool isstring(char c)
43 {
44 return (isprint((unsigned char)c)
45 || (c == '\0')
46 || strchr("\a\b\t\n\v\f\r", c));
47 }
48
write_propval_string(FILE * f,const char * s,size_t len)49 static void write_propval_string(FILE *f, const char *s, size_t len)
50 {
51 const char *end = s + len - 1;
52
53 if (!len)
54 return;
55
56 assert(*end == '\0');
57
58 fprintf(f, "\"");
59 while (s < end) {
60 char c = *s++;
61 switch (c) {
62 case '\a':
63 fprintf(f, "\\a");
64 break;
65 case '\b':
66 fprintf(f, "\\b");
67 break;
68 case '\t':
69 fprintf(f, "\\t");
70 break;
71 case '\n':
72 fprintf(f, "\\n");
73 break;
74 case '\v':
75 fprintf(f, "\\v");
76 break;
77 case '\f':
78 fprintf(f, "\\f");
79 break;
80 case '\r':
81 fprintf(f, "\\r");
82 break;
83 case '\\':
84 fprintf(f, "\\\\");
85 break;
86 case '\"':
87 fprintf(f, "\\\"");
88 break;
89 case '\0':
90 fprintf(f, "\\0");
91 break;
92 default:
93 if (isprint((unsigned char)c))
94 fprintf(f, "%c", c);
95 else
96 fprintf(f, "\\x%02"PRIx8, c);
97 }
98 }
99 fprintf(f, "\"");
100 }
101
write_propval_int(FILE * f,const char * p,size_t len,size_t width)102 static void write_propval_int(FILE *f, const char *p, size_t len, size_t width)
103 {
104 const char *end = p + len;
105 assert(len % width == 0);
106
107 for (; p < end; p += width) {
108 switch (width) {
109 case 1:
110 fprintf(f, "%02"PRIx8, *(const uint8_t*)p);
111 break;
112 case 2:
113 fprintf(f, "0x%02"PRIx16, dtb_ld16(p));
114 break;
115 case 4:
116 fprintf(f, "0x%02"PRIx32, dtb_ld32(p));
117 break;
118 case 8:
119 fprintf(f, "0x%02"PRIx64, dtb_ld64(p));
120 break;
121 }
122 if (p + width < end)
123 fputc(' ', f);
124 }
125 }
126
127 static const char *delim_start[] = {
128 [TYPE_UINT8] = "[",
129 [TYPE_UINT16] = "/bits/ 16 <",
130 [TYPE_UINT32] = "<",
131 [TYPE_UINT64] = "/bits/ 64 <",
132 [TYPE_STRING] = "",
133 };
134 static const char *delim_end[] = {
135 [TYPE_UINT8] = "]",
136 [TYPE_UINT16] = ">",
137 [TYPE_UINT32] = ">",
138 [TYPE_UINT64] = ">",
139 [TYPE_STRING] = "",
140 };
141
guess_value_type(struct property * prop)142 static enum markertype guess_value_type(struct property *prop)
143 {
144 int len = prop->val.len;
145 const char *p = prop->val.val;
146 struct marker *m = prop->val.markers;
147 int nnotstring = 0, nnul = 0;
148 int nnotstringlbl = 0, nnotcelllbl = 0;
149 int i;
150
151 for (i = 0; i < len; i++) {
152 if (! isstring(p[i]))
153 nnotstring++;
154 if (p[i] == '\0')
155 nnul++;
156 }
157
158 for_each_marker_of_type(m, LABEL) {
159 if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
160 nnotstringlbl++;
161 if ((m->offset % sizeof(cell_t)) != 0)
162 nnotcelllbl++;
163 }
164
165 if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul <= (len-nnul))
166 && (nnotstringlbl == 0)) {
167 return TYPE_STRING;
168 } else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
169 return TYPE_UINT32;
170 }
171
172 return TYPE_UINT8;
173 }
174
write_propval(FILE * f,struct property * prop)175 static void write_propval(FILE *f, struct property *prop)
176 {
177 size_t len = prop->val.len;
178 struct marker *m = prop->val.markers;
179 struct marker dummy_marker;
180 enum markertype emit_type = TYPE_NONE;
181 char *srcstr;
182
183 if (len == 0) {
184 fprintf(f, ";");
185 if (annotate) {
186 srcstr = srcpos_string_first(prop->srcpos, annotate);
187 if (srcstr) {
188 fprintf(f, " /* %s */", srcstr);
189 free(srcstr);
190 }
191 }
192 fprintf(f, "\n");
193 return;
194 }
195
196 fprintf(f, " =");
197
198 if (!next_type_marker(m)) {
199 /* data type information missing, need to guess */
200 dummy_marker.type = guess_value_type(prop);
201 dummy_marker.next = prop->val.markers;
202 dummy_marker.offset = 0;
203 dummy_marker.ref = NULL;
204 m = &dummy_marker;
205 }
206
207 for_each_marker(m) {
208 size_t chunk_len = (m->next ? m->next->offset : len) - m->offset;
209 size_t data_len = type_marker_length(m) ? : len - m->offset;
210 const char *p = &prop->val.val[m->offset];
211 struct marker *m_phandle;
212
213 if (is_type_marker(m->type)) {
214 emit_type = m->type;
215 fprintf(f, " %s", delim_start[emit_type]);
216 } else if (m->type == LABEL)
217 fprintf(f, " %s:", m->ref);
218
219 if (emit_type == TYPE_NONE || chunk_len == 0)
220 continue;
221
222 switch(emit_type) {
223 case TYPE_UINT16:
224 write_propval_int(f, p, chunk_len, 2);
225 break;
226 case TYPE_UINT32:
227 m_phandle = prop->val.markers;
228 for_each_marker_of_type(m_phandle, REF_PHANDLE)
229 if (m->offset == m_phandle->offset)
230 break;
231
232 if (m_phandle) {
233 if (m_phandle->ref[0] == '/')
234 fprintf(f, "&{%s}", m_phandle->ref);
235 else
236 fprintf(f, "&%s", m_phandle->ref);
237 if (chunk_len > 4) {
238 fputc(' ', f);
239 write_propval_int(f, p + 4, chunk_len - 4, 4);
240 }
241 } else {
242 write_propval_int(f, p, chunk_len, 4);
243 }
244 break;
245 case TYPE_UINT64:
246 write_propval_int(f, p, chunk_len, 8);
247 break;
248 case TYPE_STRING:
249 write_propval_string(f, p, chunk_len);
250 break;
251 default:
252 write_propval_int(f, p, chunk_len, 1);
253 }
254
255 if (chunk_len == data_len) {
256 size_t pos = m->offset + chunk_len;
257 fprintf(f, pos == len ? "%s" : "%s,",
258 delim_end[emit_type] ? : "");
259 emit_type = TYPE_NONE;
260 }
261 }
262 fprintf(f, ";");
263 if (annotate) {
264 srcstr = srcpos_string_first(prop->srcpos, annotate);
265 if (srcstr) {
266 fprintf(f, " /* %s */", srcstr);
267 free(srcstr);
268 }
269 }
270 fprintf(f, "\n");
271 }
272
write_tree_source_node(FILE * f,struct node * tree,int level)273 static void write_tree_source_node(FILE *f, struct node *tree, int level)
274 {
275 struct property *prop;
276 struct node *child;
277 struct label *l;
278 char *srcstr;
279
280 write_prefix(f, level);
281 for_each_label(tree->labels, l)
282 fprintf(f, "%s: ", l->label);
283 if (tree->name && (*tree->name))
284 fprintf(f, "%s {", tree->name);
285 else
286 fprintf(f, "/ {");
287
288 if (annotate) {
289 srcstr = srcpos_string_first(tree->srcpos, annotate);
290 if (srcstr) {
291 fprintf(f, " /* %s */", srcstr);
292 free(srcstr);
293 }
294 }
295 fprintf(f, "\n");
296
297 for_each_property(tree, prop) {
298 write_prefix(f, level+1);
299 for_each_label(prop->labels, l)
300 fprintf(f, "%s: ", l->label);
301 fprintf(f, "%s", prop->name);
302 write_propval(f, prop);
303 }
304 for_each_child(tree, child) {
305 fprintf(f, "\n");
306 write_tree_source_node(f, child, level+1);
307 }
308 write_prefix(f, level);
309 fprintf(f, "};");
310 if (annotate) {
311 srcstr = srcpos_string_last(tree->srcpos, annotate);
312 if (srcstr) {
313 fprintf(f, " /* %s */", srcstr);
314 free(srcstr);
315 }
316 }
317 fprintf(f, "\n");
318 }
319
dt_to_source(FILE * f,struct dt_info * dti)320 void dt_to_source(FILE *f, struct dt_info *dti)
321 {
322 struct reserve_info *re;
323
324 fprintf(f, "/dts-v1/;\n\n");
325
326 for (re = dti->reservelist; re; re = re->next) {
327 struct label *l;
328
329 for_each_label(re->labels, l)
330 fprintf(f, "%s: ", l->label);
331 fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
332 (unsigned long long)re->address,
333 (unsigned long long)re->size);
334 }
335
336 write_tree_source_node(f, dti->dt, 0);
337 }
338