scripts/dtc/treesource.c

   1 /*
   2  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  18  *                                                                   USA
  19  */
  20
  21 #include "dtc.h"
  22 #include "srcpos.h"
  23
  24 extern FILE *yyin;
  25 extern int yyparse(void);
  26 extern YYLTYPE yylloc;
  27
  28 struct boot_info *the_boot_info;
  29 bool treesource_error;
  30
  31 struct boot_info *dt_from_source(const char *fname)
  32 {
  33         the_boot_info = NULL;
  34         treesource_error = false;
  35
  36         srcfile_push(fname);
  37         yyin = current_srcfile->f;
  38         yylloc.file = current_srcfile;
  39
  40         if (yyparse() != 0)
  41                 die("Unable to parse input tree\n");
  42
  43         if (treesource_error)
  44                 die("Syntax error parsing input tree\n");
  45
  46         return the_boot_info;
  47 }
  48
  49 static void write_prefix(FILE *f, int level)
  50 {
  51         int i;
  52
  53         for (i = 0; i < level; i++)
  54                 fputc('\t', f);
  55 }
  56
  57 static bool isstring(char c)
  58 {
  59         return (isprint((unsigned char)c)
  60                 || (c == '\0')
  61                 || strchr("\a\b\t\n\v\f\r", c));
  62 }
  63
  64 static void write_propval_string(FILE *f, struct data val)
  65 {
  66         const char *str = val.val;
  67         int i;
  68         struct marker *m = val.markers;
  69
  70         assert(str[val.len-1] == '\0');
  71
  72         while (m && (m->offset == 0)) {
  73                 if (m->type == LABEL)
  74                         fprintf(f, "%s: ", m->ref);
  75                 m = m->next;
  76         }
  77         fprintf(f, "\"");
  78
  79         for (i = 0; i < (val.len-1); i++) {
  80                 char c = str[i];
  81
  82                 switch (c) {
  83                 case '\a':
  84                         fprintf(f, "\\a");
  85                         break;
  86                 case '\b':
  87                         fprintf(f, "\\b");
  88                         break;
  89                 case '\t':
  90                         fprintf(f, "\\t");
  91                         break;
  92                 case '\n':
  93                         fprintf(f, "\\n");
  94                         break;
  95                 case '\v':
  96                         fprintf(f, "\\v");
  97                         break;
  98                 case '\f':
  99                         fprintf(f, "\\f");
 100                         break;
 101                 case '\r':
 102                         fprintf(f, "\\r");
 103                         break;
 104                 case '\\':
 105                         fprintf(f, "\\\\");
 106                         break;
 107                 case '\"':
 108                         fprintf(f, "\\\"");
 109                         break;
 110                 case '\0':
 111                         fprintf(f, "\", ");
 112                         while (m && (m->offset <= (i + 1))) {
 113                                 if (m->type == LABEL) {
 114                                         assert(m->offset == (i+1));
 115                                         fprintf(f, "%s: ", m->ref);
 116                                 }
 117                                 m = m->next;
 118                         }
 119                         fprintf(f, "\"");
 120                         break;
 121                 default:
 122                         if (isprint((unsigned char)c))
 123                                 fprintf(f, "%c", c);
 124                         else
 125                                 fprintf(f, "\\x%02hhx", c);
 126                 }
 127         }
 128         fprintf(f, "\"");
 129
 130         /* Wrap up any labels at the end of the value */
 131         for_each_marker_of_type(m, LABEL) {
 132                 assert (m->offset == val.len);
 133                 fprintf(f, " %s:", m->ref);
 134         }
 135 }
 136
 137 static void write_propval_cells(FILE *f, struct data val)
 138 {
 139         void *propend = val.val + val.len;
 140         cell_t *cp = (cell_t *)val.val;
 141         struct marker *m = val.markers;
 142
 143         fprintf(f, "<");
 144         for (;;) {
 145                 while (m && (m->offset <= ((char *)cp - val.val))) {
 146                         if (m->type == LABEL) {
 147                                 assert(m->offset == ((char *)cp - val.val));
 148                                 fprintf(f, "%s: ", m->ref);
 149                         }
 150                         m = m->next;
 151                 }
 152
 153                 fprintf(f, "0x%x", fdt32_to_cpu(*cp++));
 154                 if ((void *)cp >= propend)
 155                         break;
 156                 fprintf(f, " ");
 157         }
 158
 159         /* Wrap up any labels at the end of the value */
 160         for_each_marker_of_type(m, LABEL) {
 161                 assert (m->offset == val.len);
 162                 fprintf(f, " %s:", m->ref);
 163         }
 164         fprintf(f, ">");
 165 }
 166
 167 static void write_propval_bytes(FILE *f, struct data val)
 168 {
 169         void *propend = val.val + val.len;
 170         const char *bp = val.val;
 171         struct marker *m = val.markers;
 172
 173         fprintf(f, "[");
 174         for (;;) {
 175                 while (m && (m->offset == (bp-val.val))) {
 176                         if (m->type == LABEL)
 177                                 fprintf(f, "%s: ", m->ref);
 178                         m = m->next;
 179                 }
 180
 181                 fprintf(f, "%02hhx", (unsigned char)(*bp++));
 182                 if ((const void *)bp >= propend)
 183                         break;
 184                 fprintf(f, " ");
 185         }
 186
 187         /* Wrap up any labels at the end of the value */
 188         for_each_marker_of_type(m, LABEL) {
 189                 assert (m->offset == val.len);
 190                 fprintf(f, " %s:", m->ref);
 191         }
 192         fprintf(f, "]");
 193 }
 194
 195 static void write_propval(FILE *f, struct property *prop)
 196 {
 197         int len = prop->val.len;
 198         const char *p = prop->val.val;
 199         struct marker *m = prop->val.markers;
 200         int nnotstring = 0, nnul = 0;
 201         int nnotstringlbl = 0, nnotcelllbl = 0;
 202         int i;
 203
 204         if (len == 0) {
 205                 fprintf(f, ";\n");
 206                 return;
 207         }
 208
 209         for (i = 0; i < len; i++) {
 210                 if (! isstring(p[i]))
 211                         nnotstring++;
 212                 if (p[i] == '\0')
 213                         nnul++;
 214         }
 215
 216         for_each_marker_of_type(m, LABEL) {
 217                 if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
 218                         nnotstringlbl++;
 219                 if ((m->offset % sizeof(cell_t)) != 0)
 220                         nnotcelllbl++;
 221         }
 222
 223         fprintf(f, " = ");
 224         if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul < (len-nnul))
 225             && (nnotstringlbl == 0)) {
 226                 write_propval_string(f, prop->val);
 227         } else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
 228                 write_propval_cells(f, prop->val);
 229         } else {
 230                 write_propval_bytes(f, prop->val);
 231         }
 232
 233         fprintf(f, ";\n");
 234 }
 235
 236 static void write_tree_source_node(FILE *f, struct node *tree, int level)
 237 {
 238         struct property *prop;
 239         struct node *child;
 240         struct label *l;
 241
 242         write_prefix(f, level);
 243         for_each_label(tree->labels, l)
 244                 fprintf(f, "%s: ", l->label);
 245         if (tree->name && (*tree->name))
 246                 fprintf(f, "%s {\n", tree->name);
 247         else
 248                 fprintf(f, "/ {\n");
 249
 250         for_each_property(tree, prop) {
 251                 write_prefix(f, level+1);
 252                 for_each_label(prop->labels, l)
 253                         fprintf(f, "%s: ", l->label);
 254                 fprintf(f, "%s", prop->name);
 255                 write_propval(f, prop);
 256         }
 257         for_each_child(tree, child) {
 258                 fprintf(f, "\n");
 259                 write_tree_source_node(f, child, level+1);
 260         }
 261         write_prefix(f, level);
 262         fprintf(f, "};\n");
 263 }
 264
 265
 266 void dt_to_source(FILE *f, struct boot_info *bi)
 267 {
 268         struct reserve_info *re;
 269
 270         fprintf(f, "/dts-v1/;\n\n");
 271
 272         for (re = bi->reservelist; re; re = re->next) {
 273                 struct label *l;
 274
 275                 for_each_label(re->labels, l)
 276                         fprintf(f, "%s: ", l->label);
 277                 fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
 278                         (unsigned long long)re->re.address,
 279                         (unsigned long long)re->re.size);
 280         }
 281
 282         write_tree_source_node(f, bi->dt, 0);
 283 }
 284