1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * (C) Copyright Linaro, Ltd. 2018 4 * (C) Copyright Arm Holdings. 2017 5 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005. 6 */ 7 8#include <stdlib.h> 9#include <yaml.h> 10#include "dtc.h" 11#include "srcpos.h" 12 13char *yaml_error_name[] = { 14 [YAML_NO_ERROR] = "no error", 15 [YAML_MEMORY_ERROR] = "memory error", 16 [YAML_READER_ERROR] = "reader error", 17 [YAML_SCANNER_ERROR] = "scanner error", 18 [YAML_PARSER_ERROR] = "parser error", 19 [YAML_COMPOSER_ERROR] = "composer error", 20 [YAML_WRITER_ERROR] = "writer error", 21 [YAML_EMITTER_ERROR] = "emitter error", 22}; 23 24#define yaml_emitter_emit_or_die(emitter, event) ( \ 25{ \ 26 if (!yaml_emitter_emit(emitter, event)) \ 27 die("yaml '%s': %s in %s, line %i\n", \ 28 yaml_error_name[(emitter)->error], \ 29 (emitter)->problem, __func__, __LINE__); \ 30}) 31 32static void yaml_propval_int(yaml_emitter_t *emitter, struct marker *markers, 33 char *data, unsigned int seq_offset, unsigned int len, int width) 34{ 35 yaml_event_t event; 36 void *tag; 37 unsigned int off; 38 39 switch(width) { 40 case 1: tag = "!u8"; break; 41 case 2: tag = "!u16"; break; 42 case 4: tag = "!u32"; break; 43 case 8: tag = "!u64"; break; 44 default: 45 die("Invalid width %i", width); 46 } 47 assert(len % width == 0); 48 49 yaml_sequence_start_event_initialize(&event, NULL, 50 (yaml_char_t *)tag, width == 4, YAML_FLOW_SEQUENCE_STYLE); 51 yaml_emitter_emit_or_die(emitter, &event); 52 53 for (off = 0; off < len; off += width) { 54 char buf[32]; 55 struct marker *m; 56 bool is_phandle = false; 57 58 switch(width) { 59 case 1: 60 sprintf(buf, "0x%"PRIx8, *(uint8_t*)(data + off)); 61 break; 62 case 2: 63 sprintf(buf, "0x%"PRIx16, dtb_ld16(data + off)); 64 break; 65 case 4: 66 sprintf(buf, "0x%"PRIx32, dtb_ld32(data + off)); 67 m = markers; 68 is_phandle = false; 69 for_each_marker_of_type(m, REF_PHANDLE) { 70 if (m->offset == (seq_offset + off)) { 71 is_phandle = true; 72 break; 73 } 74 } 75 break; 76 case 8: 77 sprintf(buf, "0x%"PRIx64, dtb_ld64(data + off)); 78 break; 79 } 80 81 if (is_phandle) 82 yaml_scalar_event_initialize(&event, NULL, 83 (yaml_char_t*)"!phandle", (yaml_char_t *)buf, 84 strlen(buf), 0, 0, YAML_PLAIN_SCALAR_STYLE); 85 else 86 yaml_scalar_event_initialize(&event, NULL, 87 (yaml_char_t*)YAML_INT_TAG, (yaml_char_t *)buf, 88 strlen(buf), 1, 1, YAML_PLAIN_SCALAR_STYLE); 89 yaml_emitter_emit_or_die(emitter, &event); 90 } 91 92 yaml_sequence_end_event_initialize(&event); 93 yaml_emitter_emit_or_die(emitter, &event); 94} 95 96static void yaml_propval_string(yaml_emitter_t *emitter, char *str, int len) 97{ 98 yaml_event_t event; 99 int i; 100 101 assert(str[len-1] == '\0'); 102 103 /* Make sure the entire string is in the lower 7-bit ascii range */ 104 for (i = 0; i < len; i++) 105 assert(isascii(str[i])); 106 107 yaml_scalar_event_initialize(&event, NULL, 108 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)str, 109 len-1, 0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE); 110 yaml_emitter_emit_or_die(emitter, &event); 111} 112 113static void yaml_propval(yaml_emitter_t *emitter, struct property *prop) 114{ 115 yaml_event_t event; 116 unsigned int len = prop->val.len; 117 struct marker *m = prop->val.markers; 118 struct marker *markers = prop->val.markers; 119 120 /* Emit the property name */ 121 yaml_scalar_event_initialize(&event, NULL, 122 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)prop->name, 123 strlen(prop->name), 1, 1, YAML_PLAIN_SCALAR_STYLE); 124 yaml_emitter_emit_or_die(emitter, &event); 125 126 /* Boolean properties are easiest to deal with. Length is zero, so just emit 'true' */ 127 if (len == 0) { 128 yaml_scalar_event_initialize(&event, NULL, 129 (yaml_char_t *)YAML_BOOL_TAG, 130 (yaml_char_t*)"true", 131 strlen("true"), 1, 0, YAML_PLAIN_SCALAR_STYLE); 132 yaml_emitter_emit_or_die(emitter, &event); 133 return; 134 } 135 136 if (!m) 137 die("No markers present in property '%s' value\n", prop->name); 138 139 yaml_sequence_start_event_initialize(&event, NULL, 140 (yaml_char_t *)YAML_SEQ_TAG, 1, YAML_FLOW_SEQUENCE_STYLE); 141 yaml_emitter_emit_or_die(emitter, &event); 142 143 for_each_marker(m) { 144 int chunk_len; 145 char *data = &prop->val.val[m->offset]; 146 147 if (m->type < TYPE_UINT8) 148 continue; 149 150 chunk_len = type_marker_length(m) ? : len; 151 assert(chunk_len > 0); 152 len -= chunk_len; 153 154 switch(m->type) { 155 case TYPE_UINT16: 156 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 2); 157 break; 158 case TYPE_UINT32: 159 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 4); 160 break; 161 case TYPE_UINT64: 162 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 8); 163 break; 164 case TYPE_STRING: 165 yaml_propval_string(emitter, data, chunk_len); 166 break; 167 default: 168 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 1); 169 break; 170 } 171 } 172 173 yaml_sequence_end_event_initialize(&event); 174 yaml_emitter_emit_or_die(emitter, &event); 175} 176 177 178static void yaml_tree(struct node *tree, yaml_emitter_t *emitter) 179{ 180 struct property *prop; 181 struct node *child; 182 yaml_event_t event; 183 184 if (tree->deleted) 185 return; 186 187 yaml_mapping_start_event_initialize(&event, NULL, 188 (yaml_char_t *)YAML_MAP_TAG, 1, YAML_ANY_MAPPING_STYLE); 189 yaml_emitter_emit_or_die(emitter, &event); 190 191 for_each_property(tree, prop) 192 yaml_propval(emitter, prop); 193 194 /* Loop over all the children, emitting them into the map */ 195 for_each_child(tree, child) { 196 yaml_scalar_event_initialize(&event, NULL, 197 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)child->name, 198 strlen(child->name), 1, 0, YAML_PLAIN_SCALAR_STYLE); 199 yaml_emitter_emit_or_die(emitter, &event); 200 yaml_tree(child, emitter); 201 } 202 203 yaml_mapping_end_event_initialize(&event); 204 yaml_emitter_emit_or_die(emitter, &event); 205} 206 207void dt_to_yaml(FILE *f, struct dt_info *dti) 208{ 209 yaml_emitter_t emitter; 210 yaml_event_t event; 211 212 yaml_emitter_initialize(&emitter); 213 yaml_emitter_set_output_file(&emitter, f); 214 yaml_stream_start_event_initialize(&event, YAML_UTF8_ENCODING); 215 yaml_emitter_emit_or_die(&emitter, &event); 216 217 yaml_document_start_event_initialize(&event, NULL, NULL, NULL, 0); 218 yaml_emitter_emit_or_die(&emitter, &event); 219 220 yaml_sequence_start_event_initialize(&event, NULL, (yaml_char_t *)YAML_SEQ_TAG, 1, YAML_ANY_SEQUENCE_STYLE); 221 yaml_emitter_emit_or_die(&emitter, &event); 222 223 yaml_tree(dti->dt, &emitter); 224 225 yaml_sequence_end_event_initialize(&event); 226 yaml_emitter_emit_or_die(&emitter, &event); 227 228 yaml_document_end_event_initialize(&event, 0); 229 yaml_emitter_emit_or_die(&emitter, &event); 230 231 yaml_stream_end_event_initialize(&event); 232 yaml_emitter_emit_or_die(&emitter, &event); 233 234 yaml_emitter_delete(&emitter); 235} 236