scripts/dtc/treesource.c

   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
  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
  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
  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
  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
 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, fdt16_to_cpu(*(const fdt16_t*)p));
 114                         break;
 115                 case 4:
 116                         fprintf(f, "0x%02"PRIx32, fdt32_to_cpu(*(const fdt32_t*)p));
 117                         break;
 118                 case 8:
 119                         fprintf(f, "0x%02"PRIx64, fdt64_to_cpu(*(const fdt64_t*)p));
 120                         break;
 121                 }
 122                 if (p + width < end)
 123                         fputc(' ', f);
 124         }
 125 }
 126
 127 static bool has_data_type_information(struct marker *m)
 128 {
 129         return m->type >= TYPE_UINT8;
 130 }
 131
 132 static struct marker *next_type_marker(struct marker *m)
 133 {
 134         while (m && !has_data_type_information(m))
 135                 m = m->next;
 136         return m;
 137 }
 138
 139 size_t type_marker_length(struct marker *m)
 140 {
 141         struct marker *next = next_type_marker(m->next);
 142
 143         if (next)
 144                 return next->offset - m->offset;
 145         return 0;
 146 }
 147
 148 static const char *delim_start[] = {
 149         [TYPE_UINT8] = "[",
 150         [TYPE_UINT16] = "/bits/ 16 <",
 151         [TYPE_UINT32] = "<",
 152         [TYPE_UINT64] = "/bits/ 64 <",
 153         [TYPE_STRING] = "",
 154 };
 155 static const char *delim_end[] = {
 156         [TYPE_UINT8] = "]",
 157         [TYPE_UINT16] = ">",
 158         [TYPE_UINT32] = ">",
 159         [TYPE_UINT64] = ">",
 160         [TYPE_STRING] = "",
 161 };
 162
 163 static enum markertype guess_value_type(struct property *prop)
 164 {
 165         int len = prop->val.len;
 166         const char *p = prop->val.val;
 167         struct marker *m = prop->val.markers;
 168         int nnotstring = 0, nnul = 0;
 169         int nnotstringlbl = 0, nnotcelllbl = 0;
 170         int i;
 171
 172         for (i = 0; i < len; i++) {
 173                 if (! isstring(p[i]))
 174                         nnotstring++;
 175                 if (p[i] == '\0')
 176                         nnul++;
 177         }
 178
 179         for_each_marker_of_type(m, LABEL) {
 180                 if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
 181                         nnotstringlbl++;
 182                 if ((m->offset % sizeof(cell_t)) != 0)
 183                         nnotcelllbl++;
 184         }
 185
 186         if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul < (len-nnul))
 187             && (nnotstringlbl == 0)) {
 188                 return TYPE_STRING;
 189         } else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
 190                 return TYPE_UINT32;
 191         }
 192
 193         return TYPE_UINT8;
 194 }
 195
 196 static void write_propval(FILE *f, struct property *prop)
 197 {
 198         size_t len = prop->val.len;
 199         struct marker *m = prop->val.markers;
 200         struct marker dummy_marker;
 201         enum markertype emit_type = TYPE_NONE;
 202         char *srcstr;
 203
 204         if (len == 0) {
 205                 fprintf(f, ";");
 206                 if (annotate) {
 207                         srcstr = srcpos_string_first(prop->srcpos, annotate);
 208                         if (srcstr) {
 209                                 fprintf(f, " /* %s */", srcstr);
 210                                 free(srcstr);
 211                         }
 212                 }
 213                 fprintf(f, "\n");
 214                 return;
 215         }
 216
 217         fprintf(f, " =");
 218
 219         if (!next_type_marker(m)) {
 220                 /* data type information missing, need to guess */
 221                 dummy_marker.type = guess_value_type(prop);
 222                 dummy_marker.next = prop->val.markers;
 223                 dummy_marker.offset = 0;
 224                 dummy_marker.ref = NULL;
 225                 m = &dummy_marker;
 226         }
 227
 228         for_each_marker(m) {
 229                 size_t chunk_len = (m->next ? m->next->offset : len) - m->offset;
 230                 size_t data_len = type_marker_length(m) ? : len - m->offset;
 231                 const char *p = &prop->val.val[m->offset];
 232
 233                 if (has_data_type_information(m)) {
 234                         emit_type = m->type;
 235                         fprintf(f, " %s", delim_start[emit_type]);
 236                 } else if (m->type == LABEL)
 237                         fprintf(f, " %s:", m->ref);
 238                 else if (m->offset)
 239                         fputc(' ', f);
 240
 241                 if (emit_type == TYPE_NONE) {
 242                         assert(chunk_len == 0);
 243                         continue;
 244                 }
 245
 246                 switch(emit_type) {
 247                 case TYPE_UINT16:
 248                         write_propval_int(f, p, chunk_len, 2);
 249                         break;
 250                 case TYPE_UINT32:
 251                         write_propval_int(f, p, chunk_len, 4);
 252                         break;
 253                 case TYPE_UINT64:
 254                         write_propval_int(f, p, chunk_len, 8);
 255                         break;
 256                 case TYPE_STRING:
 257                         write_propval_string(f, p, chunk_len);
 258                         break;
 259                 default:
 260                         write_propval_int(f, p, chunk_len, 1);
 261                 }
 262
 263                 if (chunk_len == data_len) {
 264                         size_t pos = m->offset + chunk_len;
 265                         fprintf(f, pos == len ? "%s" : "%s,",
 266                                 delim_end[emit_type] ? : "");
 267                         emit_type = TYPE_NONE;
 268                 }
 269         }
 270         fprintf(f, ";");
 271         if (annotate) {
 272                 srcstr = srcpos_string_first(prop->srcpos, annotate);
 273                 if (srcstr) {
 274                         fprintf(f, " /* %s */", srcstr);
 275                         free(srcstr);
 276                 }
 277         }
 278         fprintf(f, "\n");
 279 }
 280
 281 static void write_tree_source_node(FILE *f, struct node *tree, int level)
 282 {
 283         struct property *prop;
 284         struct node *child;
 285         struct label *l;
 286         char *srcstr;
 287
 288         write_prefix(f, level);
 289         for_each_label(tree->labels, l)
 290                 fprintf(f, "%s: ", l->label);
 291         if (tree->name && (*tree->name))
 292                 fprintf(f, "%s {", tree->name);
 293         else
 294                 fprintf(f, "/ {");
 295
 296         if (annotate) {
 297                 srcstr = srcpos_string_first(tree->srcpos, annotate);
 298                 if (srcstr) {
 299                         fprintf(f, " /* %s */", srcstr);
 300                         free(srcstr);
 301                 }
 302         }
 303         fprintf(f, "\n");
 304
 305         for_each_property(tree, prop) {
 306                 write_prefix(f, level+1);
 307                 for_each_label(prop->labels, l)
 308                         fprintf(f, "%s: ", l->label);
 309                 fprintf(f, "%s", prop->name);
 310                 write_propval(f, prop);
 311         }
 312         for_each_child(tree, child) {
 313                 fprintf(f, "\n");
 314                 write_tree_source_node(f, child, level+1);
 315         }
 316         write_prefix(f, level);
 317         fprintf(f, "};");
 318         if (annotate) {
 319                 srcstr = srcpos_string_last(tree->srcpos, annotate);
 320                 if (srcstr) {
 321                         fprintf(f, " /* %s */", srcstr);
 322                         free(srcstr);
 323                 }
 324         }
 325         fprintf(f, "\n");
 326 }
 327
 328 void dt_to_source(FILE *f, struct dt_info *dti)
 329 {
 330         struct reserve_info *re;
 331
 332         fprintf(f, "/dts-v1/;\n\n");
 333
 334         for (re = dti->reservelist; re; re = re->next) {
 335                 struct label *l;
 336
 337                 for_each_label(re->labels, l)
 338                         fprintf(f, "%s: ", l->label);
 339                 fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
 340                         (unsigned long long)re->address,
 341                         (unsigned long long)re->size);
 342         }
 343
 344         write_tree_source_node(f, dti->dt, 0);
 345 }