Method ValidatePsciFunctionIds

src/include/kernel_fdt.hpp:803–827

* @brief 验证 PSCI 函数 ID * @param offset 节点偏移 * @return Expected 验证结果 */

   * @return Expected<void> 验证结果
   */
  [[nodiscard]] auto ValidatePsciFunctionIds(int offset) const
      -> Expected<void> {
    auto validate_id = [this, offset](const char* name,
                                      uint64_t expected) -> Expected<void> {
      int len = 0;
      const auto* prop = fdt_get_property(fdt_header_, offset, name, &len);
      if (prop != nullptr && static_cast<size_t>(len) >= sizeof(uint32_t)) {
        uint32_t id =
            fdt32_to_cpu(*reinterpret_cast<const uint32_t*>(prop->data));
        klog::Debug("PSCI {} function ID: {:#X}", name, id);
        if (id != expected) {
          klog::Err("PSCI {} function ID mismatch: expected {:#X}, got {:#X}",
                    name, expected, id);
          return std::unexpected(Error(ErrorCode::kFdtPropertyNotFound));
        }
      }
      return {};
    };

    return validate_id("cpu_on", kPsciCpuOnFuncId)
        .and_then([&]() { return validate_id("cpu_off", kPsciCpuOffFuncId); })
        .and_then([&]() {
          return validate_id("cpu_suspend", kPsciCpuSuspendFuncId);
        });
  }
};

using KernelFdtSingleton = etl::singleton<KernelFdt>;