Method GetPsciMethod

src/include/kernel_fdt.hpp:789–796

* @brief 获取 PSCI method 属性 * @param offset 节点偏移 * @return Expected method 字符串 */

   * @return Expected<const char*> method 字符串
   */
  [[nodiscard]] auto GetPsciMethod(int offset) const -> Expected<const char*> {
    int len = 0;
    const auto* prop = fdt_get_property(fdt_header_, offset, "method", &len);
    if (prop == nullptr) {
      return std::unexpected(Error(ErrorCode::kFdtPropertyNotFound));
    }
    return reinterpret_cast<const char*>(prop->data);
  }

  /**
   * @brief 验证 PSCI 函数 ID