release/src-rt-6.x.4708/linux/linux-2.6.36/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
  27 struct boot_info *the_boot_info;
  28 int treesource_error;
  29
  30 struct boot_info *dt_from_source(const char *fname)
  31 {
  32         the_boot_info = NULL;
  33         treesource_error = 0;
  34
  35         srcpos_file = dtc_open_file(fname, NULL);
  36         yyin = srcpos_file->file;
  37
  38         if (yyparse() != 0)
  39                 die("Unable to parse input tree\n");
  40
  41         if (treesource_error)
  42                 die("Syntax error parsing input tree\n");
  43
  44         return the_boot_info;
  45 }
  46
  47 static void write_prefix(FILE *f, int level)
  48 {
  49         int i;
  50
  51         for (i = 0; i < level; i++)
  52                 fputc('\t', f);
  53 }
  54
  55 static int isstring(char c)
  56 {
  57         return (isprint(c)
  58                 || (c == '\0')
  59                 || strchr("\a\b\t\n\v\f\r", c));
  60 }
  61
  62 static void write_propval_string(FILE *f, struct data val)
  63 {
  64         const char *str = val.val;
  65         int i;
  66         int newchunk = 1;
  67         struct marker *m = val.markers;
  68
  69         assert(str[val.len-1] == '\0');
  70
  71         for (i = 0; i < (val.len-1); i++) {
  72                 char c = str[i];
  73
  74                 if (newchunk) {
  75                         while (m && (m->offset <= i)) {
  76                                 if (m->type == LABEL) {
  77                                         assert(m->offset == i);
  78                                         fprintf(f, "%s: ", m->ref);
  79                                 }
  80                                 m = m->next;
  81                         }
  82                         fprintf(f, "\"");
  83                         newchunk = 0;
  84                 }
  85
  86                 switch (c) {
  87                 case '\a':
  88                         fprintf(f, "\\a");
  89                         break;
  90                 case '\b':
  91                         fprintf(f, "\\b");
  92                         break;
  93                 case '\t':
  94                         fprintf(f, "\\t");
  95                         break;
  96                 case '\n':
  97                         fprintf(f, "\\n");
  98                         break;
  99                 case '\v':
 100                         fprintf(f, "\\v");
 101                         break;
 102                 case '\f':
 103                         fprintf(f, "\\f");
 104                         break;
 105                 case '\r':
 106                         fprintf(f, "\\r");
 107                         break;
 108                 case '\\':
 109                         fprintf(f, "\\\\");
 110                         break;
 111                 case '\"':
 112                         fprintf(f, "\\\"");
 113                         break;
 114                 case '\0':
 115                         fprintf(f, "\", ");
 116                         newchunk = 1;
 117                         break;
 118                 default:
 119                         if (isprint(c))
 120                                 fprintf(f, "%c", c);
 121                         else
 122                                 fprintf(f, "\\x%02hhx", c);
 123                 }
 124         }
 125         fprintf(f, "\"");
 126
 127         /* Wrap up any labels at the end of the value */
 128         for_each_marker_of_type(m, LABEL) {
 129                 assert (m->offset == val.len);
 130                 fprintf(f, " %s:", m->ref);
 131         }
 132 }
 133
 134 static void write_propval_cells(FILE *f, struct data val)
 135 {
 136         void *propend = val.val + val.len;
 137         cell_t *cp = (cell_t *)val.val;
 138         struct marker *m = val.markers;
 139
 140         fprintf(f, "<");
 141         for (;;) {
 142                 while (m && (m->offset <= ((char *)cp - val.val))) {
 143                         if (m->type == LABEL) {
 144                                 assert(m->offset == ((char *)cp - val.val));
 145                                 fprintf(f, "%s: ", m->ref);
 146                         }
 147                         m = m->next;
 148                 }
 149
 150                 fprintf(f, "0x%x", fdt32_to_cpu(*cp++));
 151                 if ((void *)cp >= propend)
 152                         break;
 153                 fprintf(f, " ");
 154         }
 155
 156         /* Wrap up any labels at the end of the value */
 157         for_each_marker_of_type(m, LABEL) {
 158                 assert (m->offset == val.len);
 159                 fprintf(f, " %s:", m->ref);
 160         }
 161         fprintf(f, ">");
 162 }
 163
 164 static void write_propval_bytes(FILE *f, struct data val)
 165 {
 166         void *propend = val.val + val.len;
 167         const char *bp = val.val;
 168         struct marker *m = val.markers;
 169
 170         fprintf(f, "[");
 171         for (;;) {
 172                 while (m && (m->offset == (bp-val.val))) {
 173                         if (m->type == LABEL)
 174                                 fprintf(f, "%s: ", m->ref);
 175                         m = m->next;
 176                 }
 177
 178                 fprintf(f, "%02hhx", *bp++);
 179                 if ((const void *)bp >= propend)
 180                         break;
 181                 fprintf(f, " ");
 182         }
 183
 184         /* Wrap up any labels at the end of the value */
 185         for_each_marker_of_type(m, LABEL) {
 186                 assert (m->offset == val.len);
 187                 fprintf(f, " %s:", m->ref);
 188         }
 189         fprintf(f, "]");
 190 }
 191
 192 static void write_propval(FILE *f, struct property *prop)
 193 {
 194         int len = prop->val.len;
 195         const char *p = prop->val.val;
 196         struct marker *m = prop->val.markers;
 197         int nnotstring = 0, nnul = 0;
 198         int nnotstringlbl = 0, nnotcelllbl = 0;
 199         int i;
 200
 201         if (len == 0) {
 202                 fprintf(f, ";\n");
 203                 return;
 204         }
 205
 206         for (i = 0; i < len; i++) {
 207                 if (! isstring(p[i]))
 208                         nnotstring++;
 209                 if (p[i] == '\0')
 210                         nnul++;
 211         }
 212
 213         for_each_marker_of_type(m, LABEL) {
 214                 if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
 215                         nnotstringlbl++;
 216                 if ((m->offset % sizeof(cell_t)) != 0)
 217                         nnotcelllbl++;
 218         }
 219
 220         fprintf(f, " = ");
 221         if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul < (len-nnul))
 222             && (nnotstringlbl == 0)) {
 223                 write_propval_string(f, prop->val);
 224         } else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
 225                 write_propval_cells(f, prop->val);
 226         } else {
 227                 write_propval_bytes(f, prop->val);
 228         }
 229
 230         fprintf(f, ";\n");
 231 }
 232
 233 static void write_tree_source_node(FILE *f, struct node *tree, int level)
 234 {
 235         struct property *prop;
 236         struct node *child;
 237
 238         write_prefix(f, level);
 239         if (tree->label)
 240                 fprintf(f, "%s: ", tree->label);
 241         if (tree->name && (*tree->name))
 242                 fprintf(f, "%s {\n", tree->name);
 243         else
 244                 fprintf(f, "/ {\n");
 245
 246         for_each_property(tree, prop) {
 247                 write_prefix(f, level+1);
 248                 if (prop->label)
 249                         fprintf(f, "%s: ", prop->label);
 250                 fprintf(f, "%s", prop->name);
 251                 write_propval(f, prop);
 252         }
 253         for_each_child(tree, child) {
 254                 fprintf(f, "\n");
 255                 write_tree_source_node(f, child, level+1);
 256         }
 257         write_prefix(f, level);
 258         fprintf(f, "};\n");
 259 }
 260
 261
 262 void dt_to_source(FILE *f, struct boot_info *bi)
 263 {
 264         struct reserve_info *re;
 265
 266         fprintf(f, "/dts-v1/;\n\n");
 267
 268         for (re = bi->reservelist; re; re = re->next) {
 269                 if (re->label)
 270                         fprintf(f, "%s: ", re->label);
 271                 fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
 272                         (unsigned long long)re->re.address,
 273                         (unsigned long long)re->re.size);
 274         }
 275
 276         write_tree_source_node(f, bi->dt, 0);
 277 }