| 363 | */ |
| 364 | template <typename Callback> |
| 365 | [[nodiscard]] auto ForEachNode(Callback&& callback) const -> Expected<void> { |
| 366 | assert(fdt_header_ != nullptr && "fdt_header_ is null"); |
| 367 | |
| 368 | int offset = -1; |
| 369 | int depth = 0; |
| 370 | |
| 371 | while (true) { |
| 372 | offset = fdt_next_node(fdt_header_, offset, &depth); |
| 373 | if (offset < 0) { |
| 374 | if (offset == -FDT_ERR_NOTFOUND) { |
| 375 | break; |
| 376 | } |
| 377 | return std::unexpected(Error(ErrorCode::kFdtParseFailed)); |
| 378 | } |
| 379 | |
| 380 | const char* node_name = fdt_get_name(fdt_header_, offset, nullptr); |
| 381 | if (node_name == nullptr) { |
| 382 | continue; |
| 383 | } |
| 384 | |
| 385 | int status_len = 0; |
| 386 | const auto* status_prop = |
| 387 | fdt_get_property(fdt_header_, offset, "status", &status_len); |
| 388 | if (status_prop != nullptr) { |
| 389 | const char* status = reinterpret_cast<const char*>(status_prop->data); |
| 390 | if (strcmp(status, "okay") != 0 && strcmp(status, "ok") != 0) { |
| 391 | continue; |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | const char* compatible_data = nullptr; |
| 396 | size_t compatible_len = 0; |
| 397 | int compat_len = 0; |
| 398 | const auto* compat_prop = |
| 399 | fdt_get_property(fdt_header_, offset, "compatible", &compat_len); |
| 400 | if (compat_prop != nullptr && compat_len > 0) { |
| 401 | compatible_data = reinterpret_cast<const char*>(compat_prop->data); |
| 402 | compatible_len = static_cast<size_t>(compat_len); |
| 403 | } |
| 404 | |
| 405 | uint64_t mmio_base = 0; |
| 406 | size_t mmio_size = 0; |
| 407 | int reg_len = 0; |
| 408 | const auto* reg_prop = |
| 409 | fdt_get_property(fdt_header_, offset, "reg", ®_len); |
| 410 | if (reg_prop != nullptr && |
| 411 | static_cast<size_t>(reg_len) >= 2 * sizeof(uint64_t)) { |
| 412 | const auto* reg = reinterpret_cast<const uint64_t*>(reg_prop->data); |
| 413 | mmio_base = fdt64_to_cpu(reg[0]); |
| 414 | mmio_size = fdt64_to_cpu(reg[1]); |
| 415 | } |
| 416 | |
| 417 | uint32_t irq = 0; |
| 418 | int irq_len = 0; |
| 419 | const auto* irq_prop = |
| 420 | fdt_get_property(fdt_header_, offset, "interrupts", &irq_len); |
| 421 | if (irq_prop != nullptr && |
| 422 | static_cast<size_t>(irq_len) >= sizeof(uint32_t)) { |