scripts/dtc/yamltree.c

   1 /*
   2  * (C) Copyright Linaro, Ltd. 2018
   3  * (C) Copyright Arm Holdings.  2017
   4  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  19  *                                                                   USA
  20  */
  21
  22 #include <stdlib.h>
  23 #include <yaml.h>
  24 #include "dtc.h"
  25 #include "srcpos.h"
  26
  27 char *yaml_error_name[] = {
  28         [YAML_NO_ERROR] = "no error",
  29         [YAML_MEMORY_ERROR] = "memory error",
  30         [YAML_READER_ERROR] = "reader error",
  31         [YAML_SCANNER_ERROR] = "scanner error",
  32         [YAML_PARSER_ERROR] = "parser error",
  33         [YAML_COMPOSER_ERROR] = "composer error",
  34         [YAML_WRITER_ERROR] = "writer error",
  35         [YAML_EMITTER_ERROR] = "emitter error",
  36 };
  37
  38 #define yaml_emitter_emit_or_die(emitter, event) (                      \
  39 {                                                                       \
  40         if (!yaml_emitter_emit(emitter, event))                         \
  41                 die("yaml '%s': %s in %s, line %i\n",                   \
  42                     yaml_error_name[(emitter)->error],                  \
  43                     (emitter)->problem, __func__, __LINE__);            \
  44 })
  45
  46 static void yaml_propval_int(yaml_emitter_t *emitter, struct marker *markers, char *data, int len, int width)
  47 {
  48         yaml_event_t event;
  49         void *tag;
  50         int off, start_offset = markers->offset;
  51
  52         switch(width) {
  53                 case 1: tag = "!u8"; break;
  54                 case 2: tag = "!u16"; break;
  55                 case 4: tag = "!u32"; break;
  56                 case 8: tag = "!u64"; break;
  57                 default:
  58                         die("Invalid width %i", width);
  59         }
  60         assert(len % width == 0);
  61
  62         yaml_sequence_start_event_initialize(&event, NULL,
  63                 (yaml_char_t *)tag, width == 4, YAML_FLOW_SEQUENCE_STYLE);
  64         yaml_emitter_emit_or_die(emitter, &event);
  65
  66         for (off = 0; off < len; off += width) {
  67                 char buf[32];
  68                 struct marker *m;
  69                 bool is_phandle = false;
  70
  71                 switch(width) {
  72                 case 1:
  73                         sprintf(buf, "0x%"PRIx8, *(uint8_t*)(data + off));
  74                         break;
  75                 case 2:
  76                         sprintf(buf, "0x%"PRIx16, fdt16_to_cpu(*(fdt16_t*)(data + off)));
  77                         break;
  78                 case 4:
  79                         sprintf(buf, "0x%"PRIx32, fdt32_to_cpu(*(fdt32_t*)(data + off)));
  80                         m = markers;
  81                         is_phandle = false;
  82                         for_each_marker_of_type(m, REF_PHANDLE) {
  83                                 if (m->offset == (start_offset + off)) {
  84                                         is_phandle = true;
  85                                         break;
  86                                 }
  87                         }
  88                         break;
  89                 case 8:
  90                         sprintf(buf, "0x%"PRIx64, fdt64_to_cpu(*(fdt64_t*)(data + off)));
  91                         break;
  92                 }
  93
  94                 if (is_phandle)
  95                         yaml_scalar_event_initialize(&event, NULL,
  96                                 (yaml_char_t*)"!phandle", (yaml_char_t *)buf,
  97                                 strlen(buf), 0, 0, YAML_PLAIN_SCALAR_STYLE);
  98                 else
  99                         yaml_scalar_event_initialize(&event, NULL,
 100                                 (yaml_char_t*)YAML_INT_TAG, (yaml_char_t *)buf,
 101                                 strlen(buf), 1, 1, YAML_PLAIN_SCALAR_STYLE);
 102                 yaml_emitter_emit_or_die(emitter, &event);
 103         }
 104
 105         yaml_sequence_end_event_initialize(&event);
 106         yaml_emitter_emit_or_die(emitter, &event);
 107 }
 108
 109 static void yaml_propval_string(yaml_emitter_t *emitter, char *str, int len)
 110 {
 111         yaml_event_t event;
 112         int i;
 113
 114         assert(str[len-1] == '\0');
 115
 116         /* Make sure the entire string is in the lower 7-bit ascii range */
 117         for (i = 0; i < len; i++)
 118                 assert(isascii(str[i]));
 119
 120         yaml_scalar_event_initialize(&event, NULL,
 121                 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)str,
 122                 len-1, 0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE);
 123         yaml_emitter_emit_or_die(emitter, &event);
 124 }
 125
 126 static void yaml_propval(yaml_emitter_t *emitter, struct property *prop)
 127 {
 128         yaml_event_t event;
 129         int len = prop->val.len;
 130         struct marker *m = prop->val.markers;
 131
 132         /* Emit the property name */
 133         yaml_scalar_event_initialize(&event, NULL,
 134                 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)prop->name,
 135                 strlen(prop->name), 1, 1, YAML_PLAIN_SCALAR_STYLE);
 136         yaml_emitter_emit_or_die(emitter, &event);
 137
 138         /* Boolean properties are easiest to deal with. Length is zero, so just emit 'true' */
 139         if (len == 0) {
 140                 yaml_scalar_event_initialize(&event, NULL,
 141                         (yaml_char_t *)YAML_BOOL_TAG,
 142                         (yaml_char_t*)"true",
 143                         strlen("true"), 1, 0, YAML_PLAIN_SCALAR_STYLE);
 144                 yaml_emitter_emit_or_die(emitter, &event);
 145                 return;
 146         }
 147
 148         if (!m)
 149                 die("No markers present in property '%s' value\n", prop->name);
 150
 151         yaml_sequence_start_event_initialize(&event, NULL,
 152                 (yaml_char_t *)YAML_SEQ_TAG, 1, YAML_FLOW_SEQUENCE_STYLE);
 153         yaml_emitter_emit_or_die(emitter, &event);
 154
 155         for_each_marker(m) {
 156                 int chunk_len;
 157                 char *data = &prop->val.val[m->offset];
 158
 159                 if (m->type < TYPE_UINT8)
 160                         continue;
 161
 162                 chunk_len = type_marker_length(m) ? : len;
 163                 assert(chunk_len > 0);
 164                 len -= chunk_len;
 165
 166                 switch(m->type) {
 167                 case TYPE_UINT16:
 168                         yaml_propval_int(emitter, m, data, chunk_len, 2);
 169                         break;
 170                 case TYPE_UINT32:
 171                         yaml_propval_int(emitter, m, data, chunk_len, 4);
 172                         break;
 173                 case TYPE_UINT64:
 174                         yaml_propval_int(emitter, m, data, chunk_len, 8);
 175                         break;
 176                 case TYPE_STRING:
 177                         yaml_propval_string(emitter, data, chunk_len);
 178                         break;
 179                 default:
 180                         yaml_propval_int(emitter, m, data, chunk_len, 1);
 181                         break;
 182                 }
 183         }
 184
 185         yaml_sequence_end_event_initialize(&event);
 186         yaml_emitter_emit_or_die(emitter, &event);
 187 }
 188
 189
 190 static void yaml_tree(struct node *tree, yaml_emitter_t *emitter)
 191 {
 192         struct property *prop;
 193         struct node *child;
 194         yaml_event_t event;
 195
 196         if (tree->deleted)
 197                 return;
 198
 199         yaml_mapping_start_event_initialize(&event, NULL,
 200                 (yaml_char_t *)YAML_MAP_TAG, 1, YAML_ANY_MAPPING_STYLE);
 201         yaml_emitter_emit_or_die(emitter, &event);
 202
 203         for_each_property(tree, prop)
 204                 yaml_propval(emitter, prop);
 205
 206         /* Loop over all the children, emitting them into the map */
 207         for_each_child(tree, child) {
 208                 yaml_scalar_event_initialize(&event, NULL,
 209                         (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)child->name,
 210                         strlen(child->name), 1, 0, YAML_PLAIN_SCALAR_STYLE);
 211                 yaml_emitter_emit_or_die(emitter, &event);
 212                 yaml_tree(child, emitter);
 213         }
 214
 215         yaml_mapping_end_event_initialize(&event);
 216         yaml_emitter_emit_or_die(emitter, &event);
 217 }
 218
 219 void dt_to_yaml(FILE *f, struct dt_info *dti)
 220 {
 221         yaml_emitter_t emitter;
 222         yaml_event_t event;
 223
 224         yaml_emitter_initialize(&emitter);
 225         yaml_emitter_set_output_file(&emitter, f);
 226         yaml_stream_start_event_initialize(&event, YAML_UTF8_ENCODING);
 227         yaml_emitter_emit_or_die(&emitter, &event);
 228
 229         yaml_document_start_event_initialize(&event, NULL, NULL, NULL, 0);
 230         yaml_emitter_emit_or_die(&emitter, &event);
 231
 232         yaml_sequence_start_event_initialize(&event, NULL, (yaml_char_t *)YAML_SEQ_TAG, 1, YAML_ANY_SEQUENCE_STYLE);
 233         yaml_emitter_emit_or_die(&emitter, &event);
 234
 235         yaml_tree(dti->dt, &emitter);
 236
 237         yaml_sequence_end_event_initialize(&event);
 238         yaml_emitter_emit_or_die(&emitter, &event);
 239
 240         yaml_document_end_event_initialize(&event, 0);
 241         yaml_emitter_emit_or_die(&emitter, &event);
 242
 243         yaml_stream_end_event_initialize(&event);
 244         yaml_emitter_emit_or_die(&emitter, &event);
 245
 246         yaml_emitter_delete(&emitter);
 247 }